; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
define i32 @sub_constant(i32 %x) {
; CHECK-LABEL: @sub_constant(
; CHECK-NEXT: [[R:%.*]] = add i32 [[X:%.*]], -42
; CHECK-NEXT: ret i32 [[R]]
;
%r = sub i32 %x, 42
ret i32 %r
}
@g = global i32 0
define i32 @sub_constant_expression(i32 %x) {
; CHECK-LABEL: @sub_constant_expression(
; CHECK-NEXT: [[R:%.*]] = sub i32 [[X:%.*]], ptrtoint (ptr @g to i32)
; CHECK-NEXT: ret i32 [[R]]
;
%r = sub i32 %x, ptrtoint (ptr @g to i32)
ret i32 %r
}
define <2 x i32> @sub_constant_vec(<2 x i32> %x) {
; CHECK-LABEL: @sub_constant_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[X:%.*]], <i32 -42, i32 12>
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%r = sub <2 x i32> %x, <i32 42, i32 -12>
ret <2 x i32> %r
}
define <3 x i33> @sub_constant_vec_weird_type(<3 x i33> %x) {
; CHECK-LABEL: @sub_constant_vec_weird_type(
; CHECK-NEXT: [[R:%.*]] = add <3 x i33> [[X:%.*]], <i33 42, i33 -42, i33 12>
; CHECK-NEXT: ret <3 x i33> [[R]]
;
%r = sub <3 x i33> %x, <i33 -42, i33 42, i33 -12>
ret <3 x i33> %r
}
define <4 x i32> @sub_constant_expression_vec(<4 x i32> %x) {
; CHECK-LABEL: @sub_constant_expression_vec(
; CHECK-NEXT: [[R:%.*]] = sub <4 x i32> [[X:%.*]], bitcast (i128 ptrtoint (ptr @g to i128) to <4 x i32>)
; CHECK-NEXT: ret <4 x i32> [[R]]
;
%r = sub <4 x i32> %x, bitcast (i128 ptrtoint (ptr @g to i128) to <4 x i32>)
ret <4 x i32> %r
}
define i32 @neg_sub(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_sub(
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub i32 0, %x
%r = sub i32 %y, %neg
ret i32 %r
}
define i32 @neg_nsw_sub(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_nsw_sub(
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub nsw i32 0, %x
%r = sub i32 %y, %neg
ret i32 %r
}
define i32 @neg_sub_nsw(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_sub_nsw(
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub i32 0, %x
%r = sub nsw i32 %y, %neg
ret i32 %r
}
define i32 @neg_nsw_sub_nsw(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_nsw_sub_nsw(
; CHECK-NEXT: [[R:%.*]] = add nsw i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub nsw i32 0, %x
%r = sub nsw i32 %y, %neg
ret i32 %r
}
define <2 x i32> @neg_sub_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> zeroinitializer, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_nsw_sub_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> zeroinitializer, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_sub_nsw_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_nsw_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> zeroinitializer, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_nsw_sub_nsw_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_nsw_vec(
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> zeroinitializer, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_sub_vec_poison(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_vec_poison(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> <i32 0, i32 poison>, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_nsw_sub_vec_poison(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_vec_poison(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> <i32 poison, i32 0>, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_sub_nsw_vec_poison(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_nsw_vec_poison(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> <i32 poison, i32 0>, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
; This should not drop 'nsw'.
define <2 x i32> @neg_nsw_sub_nsw_vec_poison(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_nsw_vec_poison(
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> <i32 0, i32 poison>, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
; (~X) - (~Y) --> Y - X
; Also, show that we can handle extra uses and vectors.
declare void @use8(i8)
define i8 @notnotsub(i8 %x, i8 %y) {
; CHECK-LABEL: @notnotsub(
; CHECK-NEXT: [[NX:%.*]] = xor i8 [[X:%.*]], -1
; CHECK-NEXT: [[NY:%.*]] = xor i8 [[Y:%.*]], -1
; CHECK-NEXT: [[SUB:%.*]] = sub i8 [[Y]], [[X]]
; CHECK-NEXT: call void @use8(i8 [[NX]])
; CHECK-NEXT: call void @use8(i8 [[NY]])
; CHECK-NEXT: ret i8 [[SUB]]
;
%nx = xor i8 %x, -1
%ny = xor i8 %y, -1
%sub = sub i8 %nx, %ny
call void @use8(i8 %nx)
call void @use8(i8 %ny)
ret i8 %sub
}
define <2 x i8> @notnotsub_vec(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @notnotsub_vec(
; CHECK-NEXT: [[SUB:%.*]] = sub <2 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i8> [[SUB]]
;
%nx = xor <2 x i8> %x, <i8 -1, i8 -1>
%ny = xor <2 x i8> %y, <i8 -1, i8 -1>
%sub = sub <2 x i8> %nx, %ny
ret <2 x i8> %sub
}
define <2 x i8> @notnotsub_vec_poison_elts(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @notnotsub_vec_poison_elts(
; CHECK-NEXT: [[SUB:%.*]] = sub <2 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i8> [[SUB]]
;
%nx = xor <2 x i8> %x, <i8 poison, i8 -1>
%ny = xor <2 x i8> %y, <i8 -1, i8 poison>
%sub = sub <2 x i8> %nx, %ny
ret <2 x i8> %sub
}
define i32 @test5(i32 %A, i32 %B, i32 %C) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[D_NEG:%.*]] = sub i32 [[C:%.*]], [[B:%.*]]
; CHECK-NEXT: [[E:%.*]] = add i32 [[D_NEG]], [[A:%.*]]
; CHECK-NEXT: ret i32 [[E]]
;
%D = sub i32 %B, %C
%E = sub i32 %A, %D
ret i32 %E
}
define i32 @test6(i32 %A, i32 %B) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[B_NOT:%.*]] = xor i32 [[B:%.*]], -1
; CHECK-NEXT: [[D:%.*]] = and i32 [[A:%.*]], [[B_NOT]]
; CHECK-NEXT: ret i32 [[D]]
;
%C = and i32 %A, %B
%D = sub i32 %A, %C
ret i32 %D
}
define i32 @test6commuted(i32 %A, i32 %B) {
; CHECK-LABEL: @test6commuted(
; CHECK-NEXT: [[B_NOT:%.*]] = xor i32 [[B:%.*]], -1
; CHECK-NEXT: [[D:%.*]] = and i32 [[A:%.*]], [[B_NOT]]
; CHECK-NEXT: ret i32 [[D]]
;
%C = and i32 %B, %A
%D = sub i32 %A, %C
ret i32 %D
}
define i32 @test7(i32 %A) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[B:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT: ret i32 [[B]]
;
%B = sub i32 -1, %A
ret i32 %B
}
define i32 @test8(i32 %A) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[C:%.*]] = shl i32 [[A:%.*]], 3
; CHECK-NEXT: ret i32 [[C]]
;
%B = mul i32 9, %A
%C = sub i32 %B, %A
ret i32 %C
}
define i32 @test9(i32 %A) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: [[C:%.*]] = mul i32 [[A:%.*]], -2
; CHECK-NEXT: ret i32 [[C]]
;
%B = mul i32 3, %A
%C = sub i32 %A, %B
ret i32 %C
}
define i1 @test11(i8 %A, i8 %B) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[D:%.*]] = icmp ne i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret i1 [[D]]
;
%C = sub i8 %A, %B
%D = icmp ne i8 %C, 0
ret i1 %D
}
define <2 x i1> @test11vec(<2 x i8> %A, <2 x i8> %B) {
; CHECK-LABEL: @test11vec(
; CHECK-NEXT: [[D:%.*]] = icmp ne <2 x i8> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret <2 x i1> [[D]]
;
%C = sub <2 x i8> %A, %B
%D = icmp ne <2 x i8> %C, zeroinitializer
ret <2 x i1> %D
}
define i32 @test12(i32 %A) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: [[B_NEG:%.*]] = lshr i32 [[A:%.*]], 31
; CHECK-NEXT: ret i32 [[B_NEG]]
;
%B = ashr i32 %A, 31
%C = sub i32 0, %B
ret i32 %C
}
define i32 @test13(i32 %A) {
; CHECK-LABEL: @test13(
; CHECK-NEXT: [[B_NEG:%.*]] = ashr i32 [[A:%.*]], 31
; CHECK-NEXT: ret i32 [[B_NEG]]
;
%B = lshr i32 %A, 31
%C = sub i32 0, %B
ret i32 %C
}
define <2 x i32> @test12vec(<2 x i32> %A) {
; CHECK-LABEL: @test12vec(
; CHECK-NEXT: [[B_NEG:%.*]] = lshr <2 x i32> [[A:%.*]], <i32 31, i32 31>
; CHECK-NEXT: ret <2 x i32> [[B_NEG]]
;
%B = ashr <2 x i32> %A, <i32 31, i32 31>
%C = sub <2 x i32> zeroinitializer, %B
ret <2 x i32> %C
}
define <2 x i32> @test13vec(<2 x i32> %A) {
; CHECK-LABEL: @test13vec(
; CHECK-NEXT: [[B_NEG:%.*]] = ashr <2 x i32> [[A:%.*]], <i32 31, i32 31>
; CHECK-NEXT: ret <2 x i32> [[B_NEG]]
;
%B = lshr <2 x i32> %A, <i32 31, i32 31>
%C = sub <2 x i32> zeroinitializer, %B
ret <2 x i32> %C
}
define i32 @test15(i32 %A, i32 %B) {
; CHECK-LABEL: @test15(
; CHECK-NEXT: [[C:%.*]] = sub i32 0, [[A:%.*]]
; CHECK-NEXT: [[D:%.*]] = srem i32 [[B:%.*]], [[C]]
; CHECK-NEXT: ret i32 [[D]]
;
%C = sub i32 0, %A
%D = srem i32 %B, %C
ret i32 %D
}
define i32 @test16(i32 %A) {
; CHECK-LABEL: @test16(
; CHECK-NEXT: [[X_NEG:%.*]] = sdiv i32 [[A:%.*]], -1123
; CHECK-NEXT: ret i32 [[X_NEG]]
;
%X = sdiv i32 %A, 1123
%Y = sub i32 0, %X
ret i32 %Y
}
; Can't fold subtract here because negation it might oveflow.
; PR3142
define i32 @test17(i32 %A) {
; CHECK-LABEL: @test17(
; CHECK-NEXT: [[B:%.*]] = sub i32 0, [[A:%.*]]
; CHECK-NEXT: [[C:%.*]] = sdiv i32 [[B]], 1234
; CHECK-NEXT: ret i32 [[C]]
;
%B = sub i32 0, %A
%C = sdiv i32 %B, 1234
ret i32 %C
}
define i64 @test18(i64 %Y) {
; CHECK-LABEL: @test18(
; CHECK-NEXT: ret i64 0
;
%i.4 = shl i64 %Y, 2
%i.12 = shl i64 %Y, 2
%i.8 = sub i64 %i.4, %i.12
ret i64 %i.8
}
define i1 @test20(i32 %g, i32 %h) {
; CHECK-LABEL: @test20(
; CHECK-NEXT: [[I_4:%.*]] = icmp ne i32 [[H:%.*]], 0
; CHECK-NEXT: ret i1 [[I_4]]
;
%i.2 = sub i32 %g, %h
%i.4 = icmp ne i32 %i.2, %g
ret i1 %i.4
}
define i1 @test21(i32 %g, i32 %h) {
; CHECK-LABEL: @test21(
; CHECK-NEXT: [[I_4:%.*]] = icmp ne i32 [[H:%.*]], 0
; CHECK-NEXT: ret i1 [[I_4]]
;
%i.2 = sub i32 %g, %h
%i.4 = icmp ne i32 %i.2, %g
ret i1 %i.4
}
; PR2298
define zeroext i1 @test22(i32 %a, i32 %b) nounwind {
; CHECK-LABEL: @test22(
; CHECK-NEXT: [[I5:%.*]] = icmp eq i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: ret i1 [[I5]]
;
%i2 = sub i32 0, %a
%i4 = sub i32 0, %b
%i5 = icmp eq i32 %i2, %i4
ret i1 %i5
}
define i32 @test26(i32 %x) {
; CHECK-LABEL: @test26(
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl i32 -3, [[X:%.*]]
; CHECK-NEXT: ret i32 [[SHL_NEG]]
;
%shl = shl i32 3, %x
%neg = sub i32 0, %shl
ret i32 %neg
}
define i64 @test_neg_shl_sub(i64 %a, i64 %b) {
; CHECK-LABEL: @test_neg_shl_sub(
; CHECK-NEXT: [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[MUL_NEG:%.*]] = shl i64 [[SUB_NEG]], 2
; CHECK-NEXT: ret i64 [[MUL_NEG]]
;
%sub = sub i64 %a, %b
%mul = shl i64 %sub, 2
%neg = sub i64 0, %mul
ret i64 %neg
}
define i64 @test_neg_shl_sub_extra_use1(i64 %a, i64 %b, ptr %p) {
; CHECK-LABEL: @test_neg_shl_sub_extra_use1(
; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: store i64 [[SUB]], ptr [[P:%.*]], align 8
; CHECK-NEXT: [[MUL_NEG:%.*]] = mul i64 [[SUB]], -4
; CHECK-NEXT: ret i64 [[MUL_NEG]]
;
%sub = sub i64 %a, %b
store i64 %sub, ptr %p
%mul = shl i64 %sub, 2
%neg = sub i64 0, %mul
ret i64 %neg
}
define i64 @test_neg_shl_sub_extra_use2(i64 %a, i64 %b, ptr %p) {
; CHECK-LABEL: @test_neg_shl_sub_extra_use2(
; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[MUL:%.*]] = shl i64 [[SUB]], 2
; CHECK-NEXT: store i64 [[MUL]], ptr [[P:%.*]], align 8
; CHECK-NEXT: [[NEG:%.*]] = sub i64 0, [[MUL]]
; CHECK-NEXT: ret i64 [[NEG]]
;
%sub = sub i64 %a, %b
%mul = shl i64 %sub, 2
store i64 %mul, ptr %p
%neg = sub i64 0, %mul
ret i64 %neg
}
define i64 @test_neg_shl_div(i64 %a) {
; CHECK-LABEL: @test_neg_shl_div(
; CHECK-NEXT: [[DIV_NEG:%.*]] = sdiv i64 [[A:%.*]], -3
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl i64 [[DIV_NEG]], 2
; CHECK-NEXT: ret i64 [[SHL_NEG]]
;
%div = sdiv i64 %a, 3
%shl = shl i64 %div, 2
%neg = sub i64 0, %shl
ret i64 %neg
}
define i64 @test_neg_shl_zext_i1(i1 %a, i64 %b) {
; CHECK-LABEL: @test_neg_shl_zext_i1(
; CHECK-NEXT: [[EXT_NEG:%.*]] = sext i1 [[A:%.*]] to i64
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl nsw i64 [[EXT_NEG]], [[B:%.*]]
; CHECK-NEXT: ret i64 [[SHL_NEG]]
;
%ext = zext i1 %a to i64
%shl = shl i64 %ext, %b
%neg = sub i64 0, %shl
ret i64 %neg
}
define i64 @test_neg_shl_sext_i1(i1 %a, i64 %b) {
; CHECK-LABEL: @test_neg_shl_sext_i1(
; CHECK-NEXT: [[EXT_NEG:%.*]] = zext i1 [[A:%.*]] to i64
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl nuw i64 [[EXT_NEG]], [[B:%.*]]
; CHECK-NEXT: ret i64 [[SHL_NEG]]
;
%ext = sext i1 %a to i64
%shl = shl i64 %ext, %b
%neg = sub i64 0, %shl
ret i64 %neg
}
define i64 @test_neg_zext_i1_extra_use(i1 %a, i64 %b, ptr %p) {
; CHECK-LABEL: @test_neg_zext_i1_extra_use(
; CHECK-NEXT: [[EXT_NEG:%.*]] = sext i1 [[A:%.*]] to i64
; CHECK-NEXT: [[EXT:%.*]] = zext i1 [[A]] to i64
; CHECK-NEXT: store i64 [[EXT]], ptr [[P:%.*]], align 8
; CHECK-NEXT: ret i64 [[EXT_NEG]]
;
%ext = zext i1 %a to i64
%neg = sub i64 0, %ext
store i64 %ext, ptr %p
ret i64 %neg
}
define i64 @test_neg_sext_i1_extra_use(i1 %a, i64 %b, ptr %p) {
; CHECK-LABEL: @test_neg_sext_i1_extra_use(
; CHECK-NEXT: [[EXT_NEG:%.*]] = zext i1 [[A:%.*]] to i64
; CHECK-NEXT: [[EXT:%.*]] = sext i1 [[A]] to i64
; CHECK-NEXT: store i64 [[EXT]], ptr [[P:%.*]], align 8
; CHECK-NEXT: ret i64 [[EXT_NEG]]
;
%ext = sext i1 %a to i64
%neg = sub i64 0, %ext
store i64 %ext, ptr %p
ret i64 %neg
}
define i32 @test_neg_trunc_shl_sub(i64 %a, i64 %b) {
; CHECK-LABEL: @test_neg_trunc_shl_sub(
; CHECK-NEXT: [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[SUB_TR_NEG:%.*]] = trunc i64 [[SUB_NEG]] to i32
; CHECK-NEXT: [[TRUNC_NEG:%.*]] = shl i32 [[SUB_TR_NEG]], 2
; CHECK-NEXT: ret i32 [[TRUNC_NEG]]
;
%sub = sub i64 %a, %b
%shl = shl i64 %sub, 2
%trunc = trunc i64 %shl to i32
%neg = sub i32 0, %trunc
ret i32 %neg
}
define i32 @test_neg_trunc_shl_ashr(i64 %a, i64 %b) {
; CHECK-LABEL: @test_neg_trunc_shl_ashr(
; CHECK-NEXT: [[SHR_NEG:%.*]] = lshr i64 [[A:%.*]], 63
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl nuw i64 [[SHR_NEG]], [[B:%.*]]
; CHECK-NEXT: [[TRUNC_NEG:%.*]] = trunc i64 [[SHL_NEG]] to i32
; CHECK-NEXT: ret i32 [[TRUNC_NEG]]
;
%shr = ashr i64 %a, 63
%shl = shl i64 %shr, %b
%trunc = trunc i64 %shl to i32
%neg = sub i32 0, %trunc
ret i32 %neg
}
define i32 @test_neg_trunc_shl_lshr(i64 %a, i64 %b) {
; CHECK-LABEL: @test_neg_trunc_shl_lshr(
; CHECK-NEXT: [[SHR_NEG:%.*]] = ashr i64 [[A:%.*]], 63
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl nsw i64 [[SHR_NEG]], [[B:%.*]]
; CHECK-NEXT: [[TRUNC_NEG:%.*]] = trunc i64 [[SHL_NEG]] to i32
; CHECK-NEXT: ret i32 [[TRUNC_NEG]]
;
%shr = lshr i64 %a, 63
%shl = shl i64 %shr, %b
%trunc = trunc i64 %shl to i32
%neg = sub i32 0, %trunc
ret i32 %neg
}
define i64 @test_neg_mul_sub(i64 %a, i64 %b, i64 %c) {
; CHECK-LABEL: @test_neg_mul_sub(
; CHECK-NEXT: [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[MUL_NEG:%.*]] = mul i64 [[SUB_NEG]], [[C:%.*]]
; CHECK-NEXT: ret i64 [[MUL_NEG]]
;
%sub = sub i64 %a, %b
%mul = mul i64 %sub, %c
%neg = sub i64 0, %mul
ret i64 %neg
}
define i64 @test_neg_mul_sub_commuted(i64 %a, i64 %b, i64 %c) {
; CHECK-LABEL: @test_neg_mul_sub_commuted(
; CHECK-NEXT: [[COMPLEX:%.*]] = mul i64 [[C:%.*]], [[C]]
; CHECK-NEXT: [[SUB_NEG:%.*]] = sub i64 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[MUL_NEG:%.*]] = mul i64 [[SUB_NEG]], [[COMPLEX]]
; CHECK-NEXT: ret i64 [[MUL_NEG]]
;
%complex = mul i64 %c, %c
%sub = sub i64 %a, %b
%mul = mul i64 %complex, %sub
%neg = sub i64 0, %mul
ret i64 %neg
}
define i32 @test27(i32 %x, i32 %y) {
; CHECK-LABEL: @test27(
; CHECK-NEXT: [[MUL_NEG:%.*]] = shl i32 [[Y:%.*]], 3
; CHECK-NEXT: [[SUB:%.*]] = add i32 [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%mul = mul i32 %y, -8
%sub = sub i32 %x, %mul
ret i32 %sub
}
define <2 x i32> @test27vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @test27vec(
; CHECK-NEXT: [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 6>
; CHECK-NEXT: [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%mul = mul <2 x i32> %y, <i32 -8, i32 -6>
%sub = sub <2 x i32> %x, %mul
ret <2 x i32> %sub
}
define <2 x i32> @test27vecsplat(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @test27vecsplat(
; CHECK-NEXT: [[MUL_NEG:%.*]] = shl <2 x i32> [[Y:%.*]], <i32 3, i32 3>
; CHECK-NEXT: [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%mul = mul <2 x i32> %y, <i32 -8, i32 -8>
%sub = sub <2 x i32> %x, %mul
ret <2 x i32> %sub
}
define <2 x i32> @test27vecmixed(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @test27vecmixed(
; CHECK-NEXT: [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 -8>
; CHECK-NEXT: [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%mul = mul <2 x i32> %y, <i32 -8, i32 8>
%sub = sub <2 x i32> %x, %mul
ret <2 x i32> %sub
}
define i32 @test27commuted(i32 %x, i32 %y) {
; CHECK-LABEL: @test27commuted(
; CHECK-NEXT: [[MUL_NEG:%.*]] = shl i32 [[Y:%.*]], 3
; CHECK-NEXT: [[SUB:%.*]] = add i32 [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%mul = mul i32 -8, %y
%sub = sub i32 %x, %mul
ret i32 %sub
}
define <2 x i32> @test27commutedvec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @test27commutedvec(
; CHECK-NEXT: [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 6>
; CHECK-NEXT: [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%mul = mul <2 x i32> <i32 -8, i32 -6>, %y
%sub = sub <2 x i32> %x, %mul
ret <2 x i32> %sub
}
define <2 x i32> @test27commutedvecsplat(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @test27commutedvecsplat(
; CHECK-NEXT: [[MUL_NEG:%.*]] = shl <2 x i32> [[Y:%.*]], <i32 3, i32 3>
; CHECK-NEXT: [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%mul = mul <2 x i32> <i32 -8, i32 -8>, %y
%sub = sub <2 x i32> %x, %mul
ret <2 x i32> %sub
}
define <2 x i32> @test27commutedvecmixed(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @test27commutedvecmixed(
; CHECK-NEXT: [[MUL_NEG:%.*]] = mul <2 x i32> [[Y:%.*]], <i32 8, i32 -8>
; CHECK-NEXT: [[SUB:%.*]] = add <2 x i32> [[MUL_NEG]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%mul = mul <2 x i32> <i32 -8, i32 8>, %y
%sub = sub <2 x i32> %x, %mul
ret <2 x i32> %sub
}
define i32 @test28(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test28(
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[Z:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = add i32 [[X:%.*]], [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%neg = sub i32 0, %z
%mul = mul i32 %neg, %y
%sub = sub i32 %x, %mul
ret i32 %sub
}
define i32 @test28commuted(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test28commuted(
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[Z:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = add i32 [[X:%.*]], [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%neg = sub i32 0, %z
%mul = mul i32 %y, %neg
%sub = sub i32 %x, %mul
ret i32 %sub
}
define <2 x i64> @test31(<2 x i64> %A) {
; CHECK-LABEL: @test31(
; CHECK-NEXT: [[SUB:%.*]] = add <2 x i64> [[A:%.*]], <i64 3, i64 4>
; CHECK-NEXT: ret <2 x i64> [[SUB]]
;
%xor = xor <2 x i64> %A, <i64 -1, i64 -1>
%sub = sub <2 x i64> <i64 2, i64 3>, %xor
ret <2 x i64> %sub
}
define <2 x i64> @test32(<2 x i64> %A) {
; CHECK-LABEL: @test32(
; CHECK-NEXT: [[SUB:%.*]] = sub <2 x i64> <i64 3, i64 4>, [[A:%.*]]
; CHECK-NEXT: ret <2 x i64> [[SUB]]
;
%add = add <2 x i64> %A, <i64 -1, i64 -1>
%sub = sub <2 x i64> <i64 2, i64 3>, %add
ret <2 x i64> %sub
}
define <2 x i64> @test35(<2 x i64> %A) {
; CHECK-LABEL: @test35(
; CHECK-NEXT: [[SUB:%.*]] = mul <2 x i64> [[A:%.*]], <i64 -2, i64 -3>
; CHECK-NEXT: ret <2 x i64> [[SUB]]
;
%mul = mul <2 x i64> %A, <i64 3, i64 4>
%sub = sub <2 x i64> %A, %mul
ret <2 x i64> %sub
}
define <2 x i64> @test36(<2 x i64> %A) {
; CHECK-LABEL: @test36(
; CHECK-NEXT: [[SUB:%.*]] = mul <2 x i64> [[A:%.*]], <i64 7, i64 15>
; CHECK-NEXT: ret <2 x i64> [[SUB]]
;
%shl = shl <2 x i64> %A, <i64 3, i64 4>
%sub = sub <2 x i64> %shl, %A
ret <2 x i64> %sub
}
define <2 x i32> @test37(<2 x i32> %A) {
; CHECK-LABEL: @test37(
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq <2 x i32> [[A:%.*]], <i32 -2147483648, i32 -2147483648>
; CHECK-NEXT: [[DIV_NEG:%.*]] = sext <2 x i1> [[TMP1]] to <2 x i32>
; CHECK-NEXT: ret <2 x i32> [[DIV_NEG]]
;
%div = sdiv <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
%sub = sub nsw <2 x i32> zeroinitializer, %div
ret <2 x i32> %sub
}
define i32 @test38(i32 %A) {
; CHECK-LABEL: @test38(
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[A:%.*]], -2147483648
; CHECK-NEXT: [[DIV_NEG:%.*]] = sext i1 [[TMP1]] to i32
; CHECK-NEXT: ret i32 [[DIV_NEG]]
;
%div = sdiv i32 %A, -2147483648
%sub = sub nsw i32 0, %div
ret i32 %sub
}
define i16 @test40(i16 %a, i16 %b) {
; CHECK-LABEL: @test40(
; CHECK-NEXT: [[ASHR:%.*]] = ashr i16 [[A:%.*]], 1
; CHECK-NEXT: [[ASHR1:%.*]] = ashr i16 [[B:%.*]], 1
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i16 [[ASHR]], [[ASHR1]]
; CHECK-NEXT: ret i16 [[SUB]]
;
%ashr = ashr i16 %a, 1
%ashr1 = ashr i16 %b, 1
%sub = sub i16 %ashr, %ashr1
ret i16 %sub
}
define i32 @test41(i16 %a, i16 %b) {
; CHECK-LABEL: @test41(
; CHECK-NEXT: [[CONV:%.*]] = sext i16 [[A:%.*]] to i32
; CHECK-NEXT: [[CONV1:%.*]] = sext i16 [[B:%.*]] to i32
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 [[CONV]], [[CONV1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%conv = sext i16 %a to i32
%conv1 = sext i16 %b to i32
%sub = sub i32 %conv, %conv1
ret i32 %sub
}
define i4 @test42(i4 %x, i4 %y) {
; CHECK-LABEL: @test42(
; CHECK-NEXT: [[A:%.*]] = and i4 [[Y:%.*]], 7
; CHECK-NEXT: [[B:%.*]] = and i4 [[X:%.*]], 7
; CHECK-NEXT: [[C:%.*]] = sub nsw i4 [[A]], [[B]]
; CHECK-NEXT: ret i4 [[C]]
;
%a = and i4 %y, 7
%b = and i4 %x, 7
%c = sub i4 %a, %b
ret i4 %c
}
define i4 @test43(i4 %x, i4 %y) {
; CHECK-LABEL: @test43(
; CHECK-NEXT: [[A:%.*]] = or i4 [[X:%.*]], -8
; CHECK-NEXT: [[B:%.*]] = and i4 [[Y:%.*]], 7
; CHECK-NEXT: [[C:%.*]] = sub nuw i4 [[A]], [[B]]
; CHECK-NEXT: ret i4 [[C]]
;
%a = or i4 %x, -8
%b = and i4 %y, 7
%c = sub i4 %a, %b
ret i4 %c
}
define i32 @test44(i32 %x) {
; CHECK-LABEL: @test44(
; CHECK-NEXT: [[SUB:%.*]] = add nsw i32 [[X:%.*]], -32768
; CHECK-NEXT: ret i32 [[SUB]]
;
%sub = sub nsw i32 %x, 32768
ret i32 %sub
}
define <2 x i32> @test44vec(<2 x i32> %x) {
; CHECK-LABEL: @test44vec(
; CHECK-NEXT: [[SUB:%.*]] = add nsw <2 x i32> [[X:%.*]], <i32 -32768, i32 -32768>
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%sub = sub nsw <2 x i32> %x, <i32 32768, i32 32768>
ret <2 x i32> %sub
}
define <vscale x 2 x i32> @test44scalablevec(<vscale x 2 x i32> %x) {
; CHECK-LABEL: @test44scalablevec(
; CHECK-NEXT: [[SUB:%.*]] = add nsw <vscale x 2 x i32> [[X:%.*]], shufflevector (<vscale x 2 x i32> insertelement (<vscale x 2 x i32> poison, i32 -32768, i64 0), <vscale x 2 x i32> poison, <vscale x 2 x i32> zeroinitializer)
; CHECK-NEXT: ret <vscale x 2 x i32> [[SUB]]
;
%sub = sub nsw <vscale x 2 x i32> %x, splat (i32 32768)
ret <vscale x 2 x i32> %sub
}
define <2 x i16> @test44vecminval(<2 x i16> %x) {
; CHECK-LABEL: @test44vecminval(
; CHECK-NEXT: [[SUB:%.*]] = xor <2 x i16> [[X:%.*]], <i16 -32768, i16 -32768>
; CHECK-NEXT: ret <2 x i16> [[SUB]]
;
%sub = sub nsw <2 x i16> %x, <i16 -32768, i16 -32768>
ret <2 x i16> %sub
}
; FIXME: This isn't combined to xor as above because the pattern in visitSub
; uses m_ImmConstant which matches Constant but (explicitly) not ConstantExpr.
define <vscale x 2 x i16> @test44scalablevecminval(<vscale x 2 x i16> %x) {
; CHECK-LABEL: @test44scalablevecminval(
; CHECK-NEXT: [[SUB:%.*]] = add <vscale x 2 x i16> [[X:%.*]], shufflevector (<vscale x 2 x i16> insertelement (<vscale x 2 x i16> poison, i16 -32768, i64 0), <vscale x 2 x i16> poison, <vscale x 2 x i32> zeroinitializer)
; CHECK-NEXT: ret <vscale x 2 x i16> [[SUB]]
;
%sub = sub nsw <vscale x 2 x i16> %x, splat (i16 -32768)
ret <vscale x 2 x i16> %sub
}
define i32 @test45(i32 %x, i32 %y) {
; CHECK-LABEL: @test45(
; CHECK-NEXT: [[SUB:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
%xor = xor i32 %x, %y
%sub = sub i32 %or, %xor
ret i32 %sub
}
define i32 @test45commuted(i32 %x, i32 %y) {
; CHECK-LABEL: @test45commuted(
; CHECK-NEXT: [[SUB:%.*]] = and i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
%xor = xor i32 %y, %x
%sub = sub i32 %or, %xor
ret i32 %sub
}
define i32 @test46(i32 %x, i32 %y) {
; CHECK-LABEL: @test46(
; CHECK-NEXT: [[X_NOT:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[SUB:%.*]] = and i32 [[Y:%.*]], [[X_NOT]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %x, %y
%sub = sub i32 %or, %x
ret i32 %sub
}
define i32 @test46commuted(i32 %x, i32 %y) {
; CHECK-LABEL: @test46commuted(
; CHECK-NEXT: [[X_NOT:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[SUB:%.*]] = and i32 [[Y:%.*]], [[X_NOT]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%or = or i32 %y, %x
%sub = sub i32 %or, %x
ret i32 %sub
}
define i32 @test47(i1 %A, i32 %B, i32 %C, i32 %D) {
; CHECK-LABEL: @test47(
; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[D:%.*]], [[C:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = select i1 [[A:%.*]], i32 [[TMP1]], i32 0
; CHECK-NEXT: ret i32 [[SUB]]
;
%sel0 = select i1 %A, i32 %D, i32 %B
%sel1 = select i1 %A, i32 %C, i32 %B
%sub = sub i32 %sel0, %sel1
ret i32 %sub
}
define i32 @test48(i1 %A, i32 %B, i32 %C, i32 %D) {
; CHECK-LABEL: @test48(
; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[D:%.*]], [[C:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = select i1 [[A:%.*]], i32 0, i32 [[TMP1]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%sel0 = select i1 %A, i32 %B, i32 %D
%sel1 = select i1 %A, i32 %B, i32 %C
%sub = sub i32 %sel0, %sel1
ret i32 %sub
}
define i32 @test49(i32 %X) {
; CHECK-LABEL: @test49(
; CHECK-NEXT: [[SUB:%.*]] = sub i32 1, [[X:%.*]]
; CHECK-NEXT: [[RES:%.*]] = and i32 [[SUB]], 64
; CHECK-NEXT: ret i32 [[RES]]
;
%sub = sub i32 129, %X
%res = and i32 %sub, 64
ret i32 %res
}
define i32 @test50(i32 %X) {
; CHECK-LABEL: @test50(
; CHECK-NEXT: [[SUB:%.*]] = sub i32 1, [[X:%.*]]
; CHECK-NEXT: [[RES:%.*]] = and i32 [[SUB]], 127
; CHECK-NEXT: ret i32 [[RES]]
;
%sub = sub i32 129, %X
%res = and i32 %sub, 127
ret i32 %res
}
define i32 @test51(i32 %X) {
; CHECK-LABEL: @test51(
; CHECK-NEXT: [[SUB:%.*]] = sub i32 126, [[X:%.*]]
; CHECK-NEXT: [[RES:%.*]] = and i32 [[SUB]], 64
; CHECK-NEXT: ret i32 [[RES]]
;
%sub = sub i32 254, %X
%res = and i32 %sub, 64
ret i32 %res
}
define i32 @test52(i32 %X) {
; CHECK-LABEL: @test52(
; CHECK-NEXT: [[SUB:%.*]] = sub i32 126, [[X:%.*]]
; CHECK-NEXT: [[RES:%.*]] = and i32 [[SUB]], 127
; CHECK-NEXT: ret i32 [[RES]]
;
%sub = sub i32 254, %X
%res = and i32 %sub, 127
ret i32 %res
}
define <2 x i1> @test53(<2 x i1> %A, <2 x i1> %B) {
; CHECK-LABEL: @test53(
; CHECK-NEXT: [[SUB:%.*]] = xor <2 x i1> [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: ret <2 x i1> [[SUB]]
;
%sub = sub <2 x i1> %A, %B
ret <2 x i1> %sub
}
define i32 @test54(i1 %C) {
; CHECK-LABEL: @test54(
; CHECK-NEXT: [[V:%.*]] = select i1 [[C:%.*]], i32 -877, i32 113
; CHECK-NEXT: ret i32 [[V]]
;
%A = select i1 %C, i32 1000, i32 10
%V = sub i32 123, %A
ret i32 %V
}
define <2 x i32> @test54vec(i1 %C) {
; CHECK-LABEL: @test54vec(
; CHECK-NEXT: [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> <i32 -877, i32 -877>, <2 x i32> <i32 113, i32 113>
; CHECK-NEXT: ret <2 x i32> [[V]]
;
%A = select i1 %C, <2 x i32> <i32 1000, i32 1000>, <2 x i32> <i32 10, i32 10>
%V = sub <2 x i32> <i32 123, i32 123>, %A
ret <2 x i32> %V
}
define <2 x i32> @test54vec2(i1 %C) {
; CHECK-LABEL: @test54vec2(
; CHECK-NEXT: [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> <i32 -877, i32 -2167>, <2 x i32> <i32 113, i32 303>
; CHECK-NEXT: ret <2 x i32> [[V]]
;
%A = select i1 %C, <2 x i32> <i32 1000, i32 2500>, <2 x i32> <i32 10, i32 30>
%V = sub <2 x i32> <i32 123, i32 333>, %A
ret <2 x i32> %V
}
define i32 @test55(i1 %which) {
; CHECK-LABEL: @test55(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
; CHECK: delay:
; CHECK-NEXT: br label [[FINAL]]
; CHECK: final:
; CHECK-NEXT: [[A_NEG:%.*]] = phi i32 [ -877, [[ENTRY:%.*]] ], [ 113, [[DELAY]] ]
; CHECK-NEXT: ret i32 [[A_NEG]]
;
entry:
br i1 %which, label %final, label %delay
delay:
br label %final
final:
%A = phi i32 [ 1000, %entry ], [ 10, %delay ]
%value = sub i32 123, %A
ret i32 %value
}
define <2 x i32> @test55vec(i1 %which) {
; CHECK-LABEL: @test55vec(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
; CHECK: delay:
; CHECK-NEXT: br label [[FINAL]]
; CHECK: final:
; CHECK-NEXT: [[A_NEG:%.*]] = phi <2 x i32> [ <i32 -877, i32 -877>, [[ENTRY:%.*]] ], [ <i32 113, i32 113>, [[DELAY]] ]
; CHECK-NEXT: ret <2 x i32> [[A_NEG]]
;
entry:
br i1 %which, label %final, label %delay
delay:
br label %final
final:
%A = phi <2 x i32> [ <i32 1000, i32 1000>, %entry ], [ <i32 10, i32 10>, %delay ]
%value = sub <2 x i32> <i32 123, i32 123>, %A
ret <2 x i32> %value
}
define <2 x i32> @test55vec2(i1 %which) {
; CHECK-LABEL: @test55vec2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
; CHECK: delay:
; CHECK-NEXT: br label [[FINAL]]
; CHECK: final:
; CHECK-NEXT: [[A_NEG:%.*]] = phi <2 x i32> [ <i32 -877, i32 -2167>, [[ENTRY:%.*]] ], [ <i32 113, i32 303>, [[DELAY]] ]
; CHECK-NEXT: ret <2 x i32> [[A_NEG]]
;
entry:
br i1 %which, label %final, label %delay
delay:
br label %final
final:
%A = phi <2 x i32> [ <i32 1000, i32 2500>, %entry ], [ <i32 10, i32 30>, %delay ]
%value = sub <2 x i32> <i32 123, i32 333>, %A
ret <2 x i32> %value
}
define i32 @test56(i32 %A, i32 %B) {
; CHECK-LABEL: @test56(
; CHECK-NEXT: [[Y:%.*]] = sub i32 0, [[B:%.*]]
; CHECK-NEXT: ret i32 [[Y]]
;
%X = add i32 %A, %B
%Y = sub i32 %A, %X
ret i32 %Y
}
define i32 @test57(i32 %A, i32 %B) {
; CHECK-LABEL: @test57(
; CHECK-NEXT: [[Y:%.*]] = sub i32 0, [[B:%.*]]
; CHECK-NEXT: ret i32 [[Y]]
;
%X = add i32 %B, %A
%Y = sub i32 %A, %X
ret i32 %Y
}
@dummy_global1 = external global ptr
@dummy_global2 = external global ptr
define i64 @test58(ptr %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test58(
; CHECK-NEXT: [[GEPDIFF:%.*]] = sub i64 [[I:%.*]], [[J:%.*]]
; CHECK-NEXT: ret i64 [[GEPDIFF]]
;
%gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 %i
%gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 %j
%cast1 = ptrtoint ptr %gep1 to i64
%cast2 = ptrtoint ptr %gep2 to i64
%sub = sub i64 %cast1, %cast2
ret i64 %sub
}
define i64 @test59(ptr %foo, i64 %i) {
; CHECK-LABEL: @test59(
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr i8, ptr [[FOO:%.*]], i64 [[I:%.*]]
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr i8, ptr [[TMP1]], i64 4200
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds i8, ptr [[FOO]], i64 4200
; CHECK-NEXT: store ptr [[GEP1]], ptr @dummy_global1, align 8
; CHECK-NEXT: store ptr [[GEP2]], ptr @dummy_global2, align 8
; CHECK-NEXT: ret i64 [[I]]
;
; gep1 and gep2 have more than one uses
%gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 %i
%gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
%cast1 = ptrtoint ptr %gep1 to i64
%cast2 = ptrtoint ptr %gep2 to i64
%sub = sub i64 %cast1, %cast2
store ptr %gep1, ptr @dummy_global1
store ptr %gep2, ptr @dummy_global2
ret i64 %sub
}
define i64 @test60(ptr %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test60(
; CHECK-NEXT: [[GEP1_IDX:%.*]] = mul nsw i64 [[J:%.*]], 100
; CHECK-NEXT: [[GEP1_OFFS:%.*]] = add nsw i64 [[GEP1_IDX]], [[I:%.*]]
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i8, ptr [[FOO:%.*]], i64 [[GEP1_OFFS]]
; CHECK-NEXT: [[GEPDIFF:%.*]] = add nsw i64 [[GEP1_OFFS]], -4200
; CHECK-NEXT: store ptr [[GEP1]], ptr @dummy_global1, align 8
; CHECK-NEXT: ret i64 [[GEPDIFF]]
;
; gep1 has a non-constant index and more than one uses. Shouldn't duplicate the arithmetic.
%gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 %j, i64 %i
%gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
%cast1 = ptrtoint ptr %gep1 to i64
%cast2 = ptrtoint ptr %gep2 to i64
%sub = sub i64 %cast1, %cast2
store ptr %gep1, ptr @dummy_global1
ret i64 %sub
}
define i64 @test60_nuw(ptr %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test60_nuw(
; CHECK-NEXT: [[GEP1_IDX:%.*]] = mul nuw i64 [[J:%.*]], 100
; CHECK-NEXT: [[GEP1_OFFS:%.*]] = add nuw i64 [[GEP1_IDX]], [[I:%.*]]
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr nuw i8, ptr [[FOO:%.*]], i64 [[GEP1_OFFS]]
; CHECK-NEXT: [[GEPDIFF:%.*]] = add i64 [[GEP1_OFFS]], -4200
; CHECK-NEXT: store ptr [[GEP1]], ptr @dummy_global1, align 8
; CHECK-NEXT: ret i64 [[GEPDIFF]]
;
%gep1 = getelementptr nuw [100 x [100 x i8]], ptr %foo, i64 0, i64 %j, i64 %i
%gep2 = getelementptr nuw [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
%cast1 = ptrtoint ptr %gep1 to i64
%cast2 = ptrtoint ptr %gep2 to i64
%sub = sub i64 %cast1, %cast2
store ptr %gep1, ptr @dummy_global1
ret i64 %sub
}
define i64 @test61(ptr %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test61(
; CHECK-NEXT: [[GEP2_IDX:%.*]] = mul nsw i64 [[J:%.*]], 100
; CHECK-NEXT: [[GEP2_OFFS:%.*]] = add nsw i64 [[GEP2_IDX]], [[I:%.*]]
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds i8, ptr [[FOO:%.*]], i64 [[GEP2_OFFS]]
; CHECK-NEXT: [[GEPDIFF:%.*]] = sub nsw i64 4200, [[GEP2_OFFS]]
; CHECK-NEXT: store ptr [[GEP2]], ptr @dummy_global2, align 8
; CHECK-NEXT: ret i64 [[GEPDIFF]]
;
; gep2 has a non-constant index and more than one uses. Shouldn't duplicate the arithmetic.
%gep1 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 42, i64 0
%gep2 = getelementptr inbounds [100 x [100 x i8]], ptr %foo, i64 0, i64 %j, i64 %i
%cast1 = ptrtoint ptr %gep1 to i64
%cast2 = ptrtoint ptr %gep2 to i64
%sub = sub i64 %cast1, %cast2
store ptr %gep2, ptr @dummy_global2
ret i64 %sub
}
declare void @use.ptr(ptr)
define i64 @test_sub_ptradd_multiuse(ptr %p, i64 %idx1, i64 %idx2) {
; CHECK-LABEL: @test_sub_ptradd_multiuse(
; CHECK-NEXT: [[P1:%.*]] = getelementptr inbounds i8, ptr [[P:%.*]], i64 [[IDX1:%.*]]
; CHECK-NEXT: call void @use.ptr(ptr [[P1]])
; CHECK-NEXT: [[GEPDIFF:%.*]] = sub nsw i64 [[IDX1]], [[IDX2:%.*]]
; CHECK-NEXT: ret i64 [[GEPDIFF]]
;
%p1 = getelementptr inbounds i8, ptr %p, i64 %idx1
call void @use.ptr(ptr %p1)
%p2 = getelementptr inbounds i8, ptr %p, i64 %idx2
%p1.int = ptrtoint ptr %p1 to i64
%p2.int = ptrtoint ptr %p2 to i64
%sub = sub i64 %p1.int, %p2.int
ret i64 %sub
}
define i32 @test62(i32 %A) {
; CHECK-LABEL: @test62(
; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[A:%.*]], 1
; CHECK-NEXT: [[C:%.*]] = sub i32 2, [[TMP1]]
; CHECK-NEXT: ret i32 [[C]]
;
%B = sub i32 1, %A
%C = shl i32 %B, 1
ret i32 %C
}
define <2 x i32> @test62vec(<2 x i32> %A) {
; CHECK-LABEL: @test62vec(
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i32> [[A:%.*]], <i32 1, i32 1>
; CHECK-NEXT: [[C:%.*]] = sub <2 x i32> <i32 2, i32 2>, [[TMP1]]
; CHECK-NEXT: ret <2 x i32> [[C]]
;
%B = sub <2 x i32> <i32 1, i32 1>, %A
%C = shl <2 x i32> %B, <i32 1, i32 1>
ret <2 x i32> %C
}
define i32 @test63(i32 %A) {
; CHECK-LABEL: @test63(
; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[A:%.*]], 1
; CHECK-NEXT: ret i32 [[TMP1]]
;
%B = sub i32 1, %A
%C = shl i32 %B, 1
%D = sub i32 2, %C
ret i32 %D
}
define <2 x i32> @test63vec(<2 x i32> %A) {
; CHECK-LABEL: @test63vec(
; CHECK-NEXT: [[TMP1:%.*]] = shl <2 x i32> [[A:%.*]], <i32 1, i32 1>
; CHECK-NEXT: ret <2 x i32> [[TMP1]]
;
%B = sub <2 x i32> <i32 1, i32 1>, %A
%C = shl <2 x i32> %B, <i32 1, i32 1>
%D = sub <2 x i32> <i32 2, i32 2>, %C
ret <2 x i32> %D
}
define i32 @test64(i32 %x) {
; CHECK-LABEL: @test64(
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smin.i32(i32 [[X:%.*]], i32 255)
; CHECK-NEXT: [[DOTNEG:%.*]] = add nsw i32 [[TMP1]], 1
; CHECK-NEXT: ret i32 [[DOTNEG]]
;
%1 = xor i32 %x, -1
%2 = icmp sgt i32 %1, -256
%3 = select i1 %2, i32 %1, i32 -256
%res = sub i32 0, %3
ret i32 %res
}
define i32 @test65(i32 %x) {
; CHECK-LABEL: @test65(
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 -256)
; CHECK-NEXT: [[DOTNEG:%.*]] = add i32 [[TMP1]], 1
; CHECK-NEXT: ret i32 [[DOTNEG]]
;
%1 = xor i32 %x, -1
%2 = icmp slt i32 %1, 255
%3 = select i1 %2, i32 %1, i32 255
%res = sub i32 0, %3
ret i32 %res
}
define i32 @test66(i32 %x) {
; CHECK-LABEL: @test66(
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.umin.i32(i32 [[X:%.*]], i32 -101)
; CHECK-NEXT: [[DOTNEG:%.*]] = add nuw i32 [[TMP1]], 1
; CHECK-NEXT: ret i32 [[DOTNEG]]
;
%1 = xor i32 %x, -1
%2 = icmp ugt i32 %1, 100
%3 = select i1 %2, i32 %1, i32 100
%res = sub i32 0, %3
ret i32 %res
}
define i32 @test67(i32 %x) {
; CHECK-LABEL: @test67(
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[X:%.*]], i32 100)
; CHECK-NEXT: [[DOTNEG:%.*]] = add i32 [[TMP1]], 1
; CHECK-NEXT: ret i32 [[DOTNEG]]
;
%1 = xor i32 %x, -1
%2 = icmp ult i32 %1, -101
%3 = select i1 %2, i32 %1, i32 -101
%res = sub i32 0, %3
ret i32 %res
}
; Check splat vectors too
define <2 x i32> @test68(<2 x i32> %x) {
; CHECK-LABEL: @test68(
; CHECK-NEXT: [[TMP1:%.*]] = call <2 x i32> @llvm.smin.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 255, i32 255>)
; CHECK-NEXT: [[DOTNEG:%.*]] = add nsw <2 x i32> [[TMP1]], <i32 1, i32 1>
; CHECK-NEXT: ret <2 x i32> [[DOTNEG]]
;
%1 = xor <2 x i32> %x, <i32 -1, i32 -1>
%2 = icmp sgt <2 x i32> %1, <i32 -256, i32 -256>
%3 = select <2 x i1> %2, <2 x i32> %1, <2 x i32> <i32 -256, i32 -256>
%res = sub <2 x i32> zeroinitializer, %3
ret <2 x i32> %res
}
; And non-splat constant vectors.
define <2 x i32> @test69(<2 x i32> %x) {
; CHECK-LABEL: @test69(
; CHECK-NEXT: [[TMP1:%.*]] = call <2 x i32> @llvm.smin.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 255, i32 127>)
; CHECK-NEXT: [[DOTNEG:%.*]] = add <2 x i32> [[TMP1]], <i32 1, i32 1>
; CHECK-NEXT: ret <2 x i32> [[DOTNEG]]
;
%1 = xor <2 x i32> %x, <i32 -1, i32 -1>
%2 = icmp sgt <2 x i32> %1, <i32 -256, i32 -128>
%3 = select <2 x i1> %2, <2 x i32> %1, <2 x i32> <i32 -256, i32 -128>
%res = sub <2 x i32> zeroinitializer, %3
ret <2 x i32> %res
}
; Check (X | Y) - Y --> X & ~Y when Y is a constant
define i32 @test70(i32 %A) {
; CHECK-LABEL: @test70(
; CHECK-NEXT: [[C:%.*]] = and i32 [[A:%.*]], -124
; CHECK-NEXT: ret i32 [[C]]
;
%B = or i32 %A, 123
%C = sub i32 %B, 123
ret i32 %C
}
; Check (X | Y) - Y --> (X | Y) ^ Y doesn't happen where (X | Y) has multiple uses
define i32 @test71(i32 %A, i32 %B) {
; CHECK-LABEL: @test71(
; CHECK-NEXT: [[C:%.*]] = or i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[D:%.*]] = sub i32 [[C]], [[B]]
; CHECK-NEXT: [[E:%.*]] = mul i32 [[C]], [[D]]
; CHECK-NEXT: ret i32 [[E]]
;
%C = or i32 %A, %B
%D = sub i32 %C, %B
%E = mul i32 %C, %D
ret i32 %E
}
; Check (X | Y) - Y --> X & ~Y where X and Y are vectors
define <2 x i32> @test72(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test72(
; CHECK-NEXT: [[B_NOT:%.*]] = xor <2 x i32> [[B:%.*]], <i32 -1, i32 -1>
; CHECK-NEXT: [[D:%.*]] = and <2 x i32> [[A:%.*]], [[B_NOT]]
; CHECK-NEXT: ret <2 x i32> [[D]]
;
%C = or <2 x i32> %A, %B
%D = sub <2 x i32> %C, %B
ret <2 x i32> %D
}
; Check reversing sub operands won't trigger (X | Y) - Y --> X & ~Y
define i32 @test73(i32 %A, i32 %B) {
; CHECK-LABEL: @test73(
; CHECK-NEXT: [[C:%.*]] = or i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[D:%.*]] = sub i32 [[B]], [[C]]
; CHECK-NEXT: ret i32 [[D]]
;
%C = or i32 %A, %B
%D = sub i32 %B, %C
ret i32 %D
}
define i32 @nsw_inference1(i32 %x, i32 %y) {
; CHECK-LABEL: @nsw_inference1(
; CHECK-NEXT: [[X2:%.*]] = or i32 [[X:%.*]], 1024
; CHECK-NEXT: [[Y2:%.*]] = and i32 [[Y:%.*]], 1
; CHECK-NEXT: [[Z:%.*]] = sub nuw nsw i32 [[X2]], [[Y2]]
; CHECK-NEXT: ret i32 [[Z]]
;
%x2 = or i32 %x, 1024
%y2 = and i32 %y, 1
%z = sub i32 %x2, %y2
ret i32 %z
}
define i32 @nsw_inference2(i32 %x, i32 %y) {
; CHECK-LABEL: @nsw_inference2(
; CHECK-NEXT: [[X2:%.*]] = and i32 [[X:%.*]], -1025
; CHECK-NEXT: [[Y2:%.*]] = or i32 [[Y:%.*]], -2
; CHECK-NEXT: [[Z:%.*]] = sub nsw i32 [[X2]], [[Y2]]
; CHECK-NEXT: ret i32 [[Z]]
;
%x2 = and i32 %x, -1025
%y2 = or i32 %y, -2
%z = sub i32 %x2, %y2
ret i32 %z
}
define i8 @test74(i8 %x, i8 %y) {
; CHECK-LABEL: @test74(
; CHECK-NEXT: [[T0:%.*]] = and i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @use8(i8 [[T0]])
; CHECK-NEXT: [[T1:%.*]] = sub i8 [[X]], [[T0]]
; CHECK-NEXT: ret i8 [[T1]]
;
%t0 = and i8 %x, %y
call void @use8(i8 %t0)
%t1 = sub i8 %x, %t0
ret i8 %t1
}
define i8 @test75(i8 %x) {
; CHECK-LABEL: @test75(
; CHECK-NEXT: [[T0:%.*]] = and i8 [[X:%.*]], -8
; CHECK-NEXT: call void @use8(i8 [[T0]])
; CHECK-NEXT: [[T1:%.*]] = and i8 [[X]], 7
; CHECK-NEXT: ret i8 [[T1]]
;
%t0 = and i8 %x, -8
call void @use8(i8 %t0)
%t1 = sub i8 %x, %t0
ret i8 %t1
}
; ((w-x) + y) - z --> (w+y) - (x+z)
define i8 @sub_add_sub_reassoc(i8 %w, i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @sub_add_sub_reassoc(
; CHECK-NEXT: [[TMP1:%.*]] = add i8 [[W:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = add i8 [[X:%.*]], [[Z:%.*]]
; CHECK-NEXT: [[S2:%.*]] = sub i8 [[TMP1]], [[TMP2]]
; CHECK-NEXT: ret i8 [[S2]]
;
%s1 = sub i8 %w, %x
%a = add i8 %s1, %y
%s2 = sub i8 %a, %z
ret i8 %s2
}
; vectors work too.
define <2 x i8> @sub_add_sub_reassoc_commute(<2 x i8> %w, <2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
; CHECK-LABEL: @sub_add_sub_reassoc_commute(
; CHECK-NEXT: [[D:%.*]] = sdiv <2 x i8> [[Y:%.*]], <i8 42, i8 -42>
; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i8> [[W:%.*]], [[D]]
; CHECK-NEXT: [[TMP2:%.*]] = add <2 x i8> [[X:%.*]], [[Z:%.*]]
; CHECK-NEXT: [[S2:%.*]] = sub <2 x i8> [[TMP1]], [[TMP2]]
; CHECK-NEXT: ret <2 x i8> [[S2]]
;
%d = sdiv <2 x i8> %y, <i8 42, i8 -42> ; thwart complexity-based canonicalization
%s1 = sub <2 x i8> %w, %x
%a = add <2 x i8> %d, %s1
%s2 = sub <2 x i8> %a, %z
ret <2 x i8> %s2
}
; (v-w) + (x-y) - z --> (v+x) - (w+y+z)
define i8 @sub_add_sub_reassoc_twice(i8 %v, i8 %w, i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @sub_add_sub_reassoc_twice(
; CHECK-NEXT: [[TMP1:%.*]] = add i8 [[W:%.*]], [[Z:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = add i8 [[X:%.*]], [[V:%.*]]
; CHECK-NEXT: [[TMP3:%.*]] = add i8 [[Y:%.*]], [[TMP1]]
; CHECK-NEXT: [[S3:%.*]] = sub i8 [[TMP2]], [[TMP3]]
; CHECK-NEXT: ret i8 [[S3]]
;
%s1 = sub i8 %v, %w
%s2 = sub i8 %x, %y
%a = add i8 %s1, %s2
%s3 = sub i8 %a, %z
ret i8 %s3
}
; negative test - uses
define i8 @sub_add_sub_reassoc_use1(i8 %w, i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @sub_add_sub_reassoc_use1(
; CHECK-NEXT: [[S1:%.*]] = sub i8 [[W:%.*]], [[X:%.*]]
; CHECK-NEXT: call void @use8(i8 [[S1]])
; CHECK-NEXT: [[A:%.*]] = add i8 [[S1]], [[Y:%.*]]
; CHECK-NEXT: [[S2:%.*]] = sub i8 [[A]], [[Z:%.*]]
; CHECK-NEXT: ret i8 [[S2]]
;
%s1 = sub i8 %w, %x
call void @use8(i8 %s1)
%a = add i8 %s1, %y
%s2 = sub i8 %a, %z
ret i8 %s2
}
; negative test - uses
define i8 @sub_add_sub_reassoc_use2(i8 %w, i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @sub_add_sub_reassoc_use2(
; CHECK-NEXT: [[S1:%.*]] = sub i8 [[W:%.*]], [[X:%.*]]
; CHECK-NEXT: [[A:%.*]] = add i8 [[S1]], [[Y:%.*]]
; CHECK-NEXT: call void @use8(i8 [[A]])
; CHECK-NEXT: [[S2:%.*]] = sub i8 [[A]], [[Z:%.*]]
; CHECK-NEXT: ret i8 [[S2]]
;
%s1 = sub i8 %w, %x
%a = add i8 %s1, %y
call void @use8(i8 %a)
%s2 = sub i8 %a, %z
ret i8 %s2
}
define i8 @sub_mask_lowbits(i8 %x) {
; CHECK-LABEL: @sub_mask_lowbits(
; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X:%.*]], -4
; CHECK-NEXT: [[R:%.*]] = add i8 [[TMP1]], -108
; CHECK-NEXT: ret i8 [[R]]
;
%a1 = add i8 %x, 148 ; 0x94
%a2 = and i8 %x, 3
%r = sub i8 %a1, %a2
ret i8 %r
}
; Negative test - low-bit mask must not overlap with offset
define i8 @sub_not_mask_lowbits(i8 %x) {
; CHECK-LABEL: @sub_not_mask_lowbits(
; CHECK-NEXT: [[A1:%.*]] = add i8 [[X:%.*]], 4
; CHECK-NEXT: [[A2:%.*]] = and i8 [[X]], 7
; CHECK-NEXT: [[R:%.*]] = sub i8 [[A1]], [[A2]]
; CHECK-NEXT: ret i8 [[R]]
;
%a1 = add i8 %x, 4
%a2 = and i8 %x, 7
%r = sub i8 %a1, %a2
ret i8 %r
}
define <2 x i8> @sub_mask_lowbits_splat_extra_use(<2 x i8> %x, ptr %p) {
; CHECK-LABEL: @sub_mask_lowbits_splat_extra_use(
; CHECK-NEXT: [[A2:%.*]] = and <2 x i8> [[X:%.*]], <i8 10, i8 10>
; CHECK-NEXT: store <2 x i8> [[A2]], ptr [[P:%.*]], align 2
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i8> [[X]], <i8 -11, i8 -11>
; CHECK-NEXT: [[R:%.*]] = add <2 x i8> [[TMP1]], <i8 -64, i8 -64>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a1 = add <2 x i8> %x, <i8 192, i8 192> ; 0xc0
%a2 = and <2 x i8> %x, <i8 10, i8 10> ; 0x0a
store <2 x i8> %a2, ptr %p
%r = sub <2 x i8> %a1, %a2
ret <2 x i8> %r
}
define i16 @sub_nsw_mul_nsw(i16 %x, i16 %y) {
; CHECK-LABEL: @sub_nsw_mul_nsw(
; CHECK-NEXT: [[TMP1:%.*]] = sub nsw i16 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = shl nsw i16 [[TMP1]], 3
; CHECK-NEXT: ret i16 [[R]]
;
%x8 = mul nsw i16 %x, 8
%y8 = mul nsw i16 %y, 8
%r = sub nsw i16 %x8, %y8
ret i16 %r
}
define i16 @sub_nuw_mul_nsw(i16 %x, i16 %y) {
; CHECK-LABEL: @sub_nuw_mul_nsw(
; CHECK-NEXT: [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = shl i16 [[TMP1]], 2
; CHECK-NEXT: ret i16 [[R]]
;
%x8 = mul nsw i16 %x, 4
%y8 = mul nsw i16 %y, 4
%r = sub nuw i16 %x8, %y8
ret i16 %r
}
define i16 @sub_mul_nsw(i16 %x, i16 %y) {
; CHECK-LABEL: @sub_mul_nsw(
; CHECK-NEXT: [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = shl i16 [[TMP1]], 4
; CHECK-NEXT: ret i16 [[R]]
;
%x8 = mul nsw i16 %x, 16
%y8 = mul nsw i16 %y, 16
%r = sub i16 %x8, %y8
ret i16 %r
}
define i16 @sub_nsw_mul_nuw(i16 %x, i16 %y) {
; CHECK-LABEL: @sub_nsw_mul_nuw(
; CHECK-NEXT: [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = shl i16 [[TMP1]], 3
; CHECK-NEXT: ret i16 [[R]]
;
%x8 = mul nuw i16 %x, 8
%y8 = mul nuw i16 %y, 8
%r = sub nsw i16 %x8, %y8
ret i16 %r
}
define i16 @sub_nuw_mul_nuw(i16 %x, i16 %y) {
; CHECK-LABEL: @sub_nuw_mul_nuw(
; CHECK-NEXT: [[TMP1:%.*]] = sub nuw i16 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = shl nuw i16 [[TMP1]], 4
; CHECK-NEXT: ret i16 [[R]]
;
%x8 = mul nuw i16 %x, 16
%y8 = mul nuw i16 %y, 16
%r = sub nuw i16 %x8, %y8
ret i16 %r
}
define i16 @sub_mul_nuw(i16 %x, i16 %y) {
; CHECK-LABEL: @sub_mul_nuw(
; CHECK-NEXT: [[TMP1:%.*]] = sub i16 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = shl i16 [[TMP1]], 5
; CHECK-NEXT: ret i16 [[R]]
;
%x8 = mul nuw i16 %x, 32
%y8 = mul nuw i16 %y, 32
%r = sub i16 %x8, %y8
ret i16 %r
}
define i32 @and_test(i32 %x, i32 %y) {
; CHECK-LABEL: @and_test(
; CHECK-NEXT: [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%o = or i32 %x, %y
%r = sub i32 %a, %o
ret i32 %r
}
define i32 @and_test2(i32 %x, i32 %y) {
; CHECK-LABEL: @and_test2(
; CHECK-NEXT: [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%o = or i32 %y, %x
%r = sub i32 %a, %o
ret i32 %r
}
define i32 @and_test3(i32 %x, i32 %y) {
; CHECK-LABEL: @and_test3(
; CHECK-NEXT: [[R:%.*]] = and i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %y, %x
%o = or i32 %x, %y
%r = sub i32 %a, %o
ret i32 %r
}
define <2 x i8> @and_vec(<2 x i8> %X, <2 x i8> %Y) {
; CHECK-LABEL: @and_vec(
; CHECK-NEXT: [[R:%.*]] = and <2 x i8> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a = add <2 x i8> %X, %Y
%o = or <2 x i8> %X, %Y
%r = sub <2 x i8> %a, %o
ret <2 x i8> %r
}
define i32 @or_test(i32 %x, i32 %y) {
; CHECK-LABEL: @or_test(
; CHECK-NEXT: [[R:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%b = and i32 %x, %y
%r = sub i32 %a, %b
ret i32 %r
}
define i32 @or_test2(i32 %x, i32 %y) {
; CHECK-LABEL: @or_test2(
; CHECK-NEXT: [[R:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%b = and i32 %y, %x
%r = sub i32 %a, %b
ret i32 %r
}
define i32 @or_test3(i32 %x, i32 %y) {
; CHECK-LABEL: @or_test3(
; CHECK-NEXT: [[R:%.*]] = or i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %y, %x
%b = and i32 %x, %y
%r = sub i32 %a, %b
ret i32 %r
}
define <2 x i8> @or_vec(<2 x i8> %X, <2 x i8> %Y) {
; CHECK-LABEL: @or_vec(
; CHECK-NEXT: [[R:%.*]] = or <2 x i8> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a = add <2 x i8> %X, %Y
%b = and <2 x i8> %X, %Y
%r = sub <2 x i8> %a, %b
ret <2 x i8> %r
}
define i32 @pr51584(i32 %a, i32 %b) {
; CHECK-LABEL: @pr51584(
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[DOTNEG:%.*]] = sub i32 -11, [[TMP1]]
; CHECK-NEXT: ret i32 [[DOTNEG]]
;
%sub = sub i32 0, %a
%add = add nsw i32 11, %b
%sub1 = sub i32 %sub, %add
ret i32 %sub1
}
define i8 @sub_srem(i8 noundef %x, i8 %y) {
; CHECK-LABEL: @sub_srem(
; CHECK-NEXT: [[REM:%.*]] = srem i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 [[X]], [[REM]]
; CHECK-NEXT: ret i8 [[SUB]]
;
%rem = srem i8 %x, %y
%sub = sub i8 %x, %rem
ret i8 %sub
}
define <2 x i5> @sub_urem(<2 x i5> noundef %x, <2 x i5> %y) {
; CHECK-LABEL: @sub_urem(
; CHECK-NEXT: [[REM:%.*]] = urem <2 x i5> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub nuw <2 x i5> [[X]], [[REM]]
; CHECK-NEXT: ret <2 x i5> [[SUB]]
;
%rem = urem <2 x i5> %x, %y
%sub = sub <2 x i5> %x, %rem
ret <2 x i5> %sub
}
define <3 x i32> @nuw_const_zext(<3 x i8> %y) {
; CHECK-LABEL: @nuw_const_zext(
; CHECK-NEXT: [[ZY:%.*]] = zext <3 x i8> [[Y:%.*]] to <3 x i32>
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw <3 x i32> <i32 255, i32 128, i32 0>, [[ZY]]
; CHECK-NEXT: ret <3 x i32> [[S]]
;
%zy = zext <3 x i8> %y to <3 x i32>
%s = sub nuw <3 x i32> <i32 255, i32 128, i32 0>, %zy
ret <3 x i32> %s
}
define i32 @nuw_const_zext_big(i8 %y) {
; CHECK-LABEL: @nuw_const_zext_big(
; CHECK-NEXT: [[ZY:%.*]] = zext i8 [[Y:%.*]] to i32
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw i32 257, [[ZY]]
; CHECK-NEXT: ret i32 [[S]]
;
%zy = zext i8 %y to i32
%s = sub nuw i32 257, %zy
ret i32 %s
}
define i32 @nuw_zext_zext(i8 %x, i8 %y) {
; CHECK-LABEL: @nuw_zext_zext(
; CHECK-NEXT: [[ZX:%.*]] = zext i8 [[X:%.*]] to i32
; CHECK-NEXT: [[ZY:%.*]] = zext i8 [[Y:%.*]] to i32
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw i32 [[ZX]], [[ZY]]
; CHECK-NEXT: ret i32 [[S]]
;
%zx = zext i8 %x to i32
%zy = zext i8 %y to i32
%s = sub nuw i32 %zx, %zy
ret i32 %s
}
define <2 x i16> @nuw_zext_sext(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @nuw_zext_sext(
; CHECK-NEXT: [[ZX:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i16>
; CHECK-NEXT: [[SY:%.*]] = sext <2 x i8> [[Y:%.*]] to <2 x i16>
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw <2 x i16> [[ZX]], [[SY]]
; CHECK-NEXT: ret <2 x i16> [[S]]
;
%zx = zext <2 x i8> %x to <2 x i16>
%sy = sext <2 x i8> %y to <2 x i16>
%s = sub nuw <2 x i16> %zx, %sy
ret <2 x i16> %s
}
define i32 @nuw_sext_zext(i8 %x, i8 %y) {
; CHECK-LABEL: @nuw_sext_zext(
; CHECK-NEXT: [[SX:%.*]] = sext i8 [[X:%.*]] to i32
; CHECK-NEXT: [[ZY:%.*]] = zext i8 [[Y:%.*]] to i32
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw i32 [[SX]], [[ZY]]
; CHECK-NEXT: ret i32 [[S]]
;
%sx = sext i8 %x to i32
%zy = zext i8 %y to i32
%s = sub nuw i32 %sx, %zy
ret i32 %s
}
define i8 @nuw_zext_zext_use1(i5 %x, i5 %y) {
; CHECK-LABEL: @nuw_zext_zext_use1(
; CHECK-NEXT: [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
; CHECK-NEXT: call void @use8(i8 [[ZX]])
; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw i8 [[ZX]], [[ZY]]
; CHECK-NEXT: ret i8 [[S]]
;
%zx = zext i5 %x to i8
call void @use8(i8 %zx)
%zy = zext i5 %y to i8
%s = sub nuw i8 %zx, %zy
ret i8 %s
}
define i8 @nuw_zext_zext_use2(i5 %x, i5 %y) {
; CHECK-LABEL: @nuw_zext_zext_use2(
; CHECK-NEXT: [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
; CHECK-NEXT: call void @use8(i8 [[ZY]])
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw i8 [[ZX]], [[ZY]]
; CHECK-NEXT: ret i8 [[S]]
;
%zx = zext i5 %x to i8
%zy = zext i5 %y to i8
call void @use8(i8 %zy)
%s = sub nuw i8 %zx, %zy
ret i8 %s
}
define i8 @nuw_zext_zext_use3(i5 %x, i5 %y) {
; CHECK-LABEL: @nuw_zext_zext_use3(
; CHECK-NEXT: [[ZX:%.*]] = zext i5 [[X:%.*]] to i8
; CHECK-NEXT: call void @use8(i8 [[ZX]])
; CHECK-NEXT: [[ZY:%.*]] = zext i5 [[Y:%.*]] to i8
; CHECK-NEXT: call void @use8(i8 [[ZY]])
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw i8 [[ZX]], [[ZY]]
; CHECK-NEXT: ret i8 [[S]]
;
%zx = zext i5 %x to i8
call void @use8(i8 %zx)
%zy = zext i5 %y to i8
call void @use8(i8 %zy)
%s = sub nuw i8 %zx, %zy
ret i8 %s
}
define i32 @nuw_zext_zext_different_width(i8 %x, i7 %y) {
; CHECK-LABEL: @nuw_zext_zext_different_width(
; CHECK-NEXT: [[ZX:%.*]] = zext i8 [[X:%.*]] to i32
; CHECK-NEXT: [[ZY:%.*]] = zext i7 [[Y:%.*]] to i32
; CHECK-NEXT: [[S:%.*]] = sub nuw nsw i32 [[ZX]], [[ZY]]
; CHECK-NEXT: ret i32 [[S]]
;
%zx = zext i8 %x to i32
%zy = zext i7 %y to i32
%s = sub nuw i32 %zx, %zy
ret i32 %s
}
define i16 @sext_nsw_noundef(i8 noundef %x, i8 %y) {
; CHECK-LABEL: @sext_nsw_noundef(
; CHECK-NEXT: [[Z:%.*]] = sext i8 [[Y:%.*]] to i16
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub nsw i8 %x, %y
%ex = sext i8 %x to i16
%ed = sext i8 %d to i16
%z = sub i16 %ex, %ed
ret i16 %z
}
; negative test - requires noundef
define i16 @sext_nsw(i8 %x, i8 %y) {
; CHECK-LABEL: @sext_nsw(
; CHECK-NEXT: [[D:%.*]] = sub nsw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[EX:%.*]] = sext i8 [[X]] to i16
; CHECK-NEXT: [[ED:%.*]] = sext i8 [[D]] to i16
; CHECK-NEXT: [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub nsw i8 %x, %y
%ex = sext i8 %x to i16
%ed = sext i8 %d to i16
%z = sub i16 %ex, %ed
ret i16 %z
}
; negative test - requires nsw
define i16 @sext_noundef(i8 noundef %x, i8 %y) {
; CHECK-LABEL: @sext_noundef(
; CHECK-NEXT: [[D:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[EX:%.*]] = sext i8 [[X]] to i16
; CHECK-NEXT: [[ED:%.*]] = sext i8 [[D]] to i16
; CHECK-NEXT: [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub i8 %x, %y
%ex = sext i8 %x to i16
%ed = sext i8 %d to i16
%z = sub i16 %ex, %ed
ret i16 %z
}
; negative test - must have common operand
define i16 @sext_nsw_noundef_wrong_val(i8 noundef %x, i8 noundef %y, i8 noundef %q) {
; CHECK-LABEL: @sext_nsw_noundef_wrong_val(
; CHECK-NEXT: [[D:%.*]] = sub nsw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[EQ:%.*]] = sext i8 [[Q:%.*]] to i16
; CHECK-NEXT: [[ED:%.*]] = sext i8 [[D]] to i16
; CHECK-NEXT: [[Z:%.*]] = sub nsw i16 [[EQ]], [[ED]]
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub nsw i8 %x, %y
%eq = sext i8 %q to i16
%ed = sext i8 %d to i16
%z = sub i16 %eq, %ed
ret i16 %z
}
; two no-wrap analyses combine to allow reduction
define i16 @srem_sext_noundef(i8 noundef %x, i8 %y) {
; CHECK-LABEL: @srem_sext_noundef(
; CHECK-NEXT: [[R:%.*]] = srem i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[Z:%.*]] = sext i8 [[R]] to i16
; CHECK-NEXT: ret i16 [[Z]]
;
%r = srem i8 %x, %y
%d = sub i8 %x, %r
%sd = sext i8 %d to i16
%sx = sext i8 %x to i16
%z = sub i16 %sx, %sd
ret i16 %z
}
define i16 @zext_nuw_noundef(i8 noundef %x, i8 %y) {
; CHECK-LABEL: @zext_nuw_noundef(
; CHECK-NEXT: [[Z:%.*]] = zext i8 [[Y:%.*]] to i16
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub nuw i8 %x, %y
%ex = zext i8 %x to i16
%ed = zext i8 %d to i16
%z = sub i16 %ex, %ed
ret i16 %z
}
; negative test - requires noundef
define i16 @zext_nuw(i8 %x, i8 %y) {
; CHECK-LABEL: @zext_nuw(
; CHECK-NEXT: [[D:%.*]] = sub nuw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[EX:%.*]] = zext i8 [[X]] to i16
; CHECK-NEXT: [[ED:%.*]] = zext i8 [[D]] to i16
; CHECK-NEXT: [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub nuw i8 %x, %y
%ex = zext i8 %x to i16
%ed = zext i8 %d to i16
%z = sub i16 %ex, %ed
ret i16 %z
}
; negative test - requires nuw
define i16 @zext_noundef(i8 noundef %x, i8 %y) {
; CHECK-LABEL: @zext_noundef(
; CHECK-NEXT: [[D:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[EX:%.*]] = zext i8 [[X]] to i16
; CHECK-NEXT: [[ED:%.*]] = zext i8 [[D]] to i16
; CHECK-NEXT: [[Z:%.*]] = sub nsw i16 [[EX]], [[ED]]
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub i8 %x, %y
%ex = zext i8 %x to i16
%ed = zext i8 %d to i16
%z = sub i16 %ex, %ed
ret i16 %z
}
; negative test - must have common operand
define i16 @zext_nsw_noundef_wrong_val(i8 noundef %x, i8 noundef %y, i8 noundef %q) {
; CHECK-LABEL: @zext_nsw_noundef_wrong_val(
; CHECK-NEXT: [[D:%.*]] = sub nuw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[EQ:%.*]] = zext i8 [[Q:%.*]] to i16
; CHECK-NEXT: [[ED:%.*]] = zext i8 [[D]] to i16
; CHECK-NEXT: [[Z:%.*]] = sub nsw i16 [[EQ]], [[ED]]
; CHECK-NEXT: ret i16 [[Z]]
;
%d = sub nuw i8 %x, %y
%eq = zext i8 %q to i16
%ed = zext i8 %d to i16
%z = sub i16 %eq, %ed
ret i16 %z
}
; two no-wrap analyses combine to allow reduction
define i16 @urem_zext_noundef(i8 noundef %x, i8 %y) {
; CHECK-LABEL: @urem_zext_noundef(
; CHECK-NEXT: [[R:%.*]] = urem i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[Z:%.*]] = zext i8 [[R]] to i16
; CHECK-NEXT: ret i16 [[Z]]
;
%r = urem i8 %x, %y
%d = sub i8 %x, %r
%ed = zext i8 %d to i16
%ex = zext i8 %x to i16
%z = sub i16 %ex, %ed
ret i16 %z
}
; x * y - x --> (y - 1) * x
; TODO: The mul could retain nsw.
define i8 @mul_sub_common_factor_commute1(i8 %x, i8 %y) {
; CHECK-LABEL: @mul_sub_common_factor_commute1(
; CHECK-NEXT: [[X1:%.*]] = add i8 [[Y:%.*]], -1
; CHECK-NEXT: [[A:%.*]] = mul i8 [[X:%.*]], [[X1]]
; CHECK-NEXT: ret i8 [[A]]
;
%m = mul nsw i8 %x, %y
%a = sub nsw i8 %m, %x
ret i8 %a
}
; TODO: The mul could retain nuw.
define <2 x i8> @mul_sub_common_factor_commute2(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @mul_sub_common_factor_commute2(
; CHECK-NEXT: [[M1:%.*]] = add <2 x i8> [[Y:%.*]], <i8 -1, i8 -1>
; CHECK-NEXT: [[A:%.*]] = mul <2 x i8> [[M1]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i8> [[A]]
;
%m = mul nuw <2 x i8> %y, %x
%a = sub nuw <2 x i8> %m, %x
ret <2 x i8> %a
}
; x - (x * y) --> (1 - y) * x
define i8 @mul_sub_common_factor_commute3(i8 %x, i8 %y) {
; CHECK-LABEL: @mul_sub_common_factor_commute3(
; CHECK-NEXT: [[M1:%.*]] = sub i8 1, [[Y:%.*]]
; CHECK-NEXT: [[A:%.*]] = mul i8 [[X:%.*]], [[M1]]
; CHECK-NEXT: ret i8 [[A]]
;
%m = mul nuw i8 %x, %y
%a = sub nsw i8 %x, %m
ret i8 %a
}
define i8 @mul_sub_common_factor_commute4(i8 %x, i8 %y) {
; CHECK-LABEL: @mul_sub_common_factor_commute4(
; CHECK-NEXT: [[M1:%.*]] = sub i8 1, [[Y:%.*]]
; CHECK-NEXT: [[A:%.*]] = mul i8 [[X:%.*]], [[M1]]
; CHECK-NEXT: ret i8 [[A]]
;
%m = mul nsw i8 %y, %x
%a = sub nuw i8 %x, %m
ret i8 %a
}
; negative test - uses
define i8 @mul_sub_common_factor_use(i8 %x, i8 %y) {
; CHECK-LABEL: @mul_sub_common_factor_use(
; CHECK-NEXT: [[M:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @use8(i8 [[M]])
; CHECK-NEXT: [[A:%.*]] = sub i8 [[M]], [[X]]
; CHECK-NEXT: ret i8 [[A]]
;
%m = mul i8 %x, %y
call void @use8(i8 %m)
%a = sub i8 %m, %x
ret i8 %a
}
define i5 @demand_low_bits_uses(i8 %x, i8 %y) {
; CHECK-LABEL: @demand_low_bits_uses(
; CHECK-NEXT: [[M:%.*]] = and i8 [[X:%.*]], 96
; CHECK-NEXT: [[A:%.*]] = sub i8 [[Y:%.*]], [[M]]
; CHECK-NEXT: call void @use8(i8 [[A]])
; CHECK-NEXT: [[R:%.*]] = trunc i8 [[Y]] to i5
; CHECK-NEXT: ret i5 [[R]]
;
%m = and i8 %x, 96 ; 0x60
%a = sub i8 %y, %m
call void @use8(i8 %a)
%r = trunc i8 %a to i5
ret i5 %r
}
; negative test - demands one more bit
define i6 @demand_low_bits_uses_extra_bit(i8 %x, i8 %y) {
; CHECK-LABEL: @demand_low_bits_uses_extra_bit(
; CHECK-NEXT: [[M:%.*]] = and i8 [[X:%.*]], 96
; CHECK-NEXT: [[A:%.*]] = sub i8 [[Y:%.*]], [[M]]
; CHECK-NEXT: call void @use8(i8 [[A]])
; CHECK-NEXT: [[R:%.*]] = trunc i8 [[A]] to i6
; CHECK-NEXT: ret i6 [[R]]
;
%m = and i8 %x, 96 ; 0x60
%a = sub i8 %y, %m
call void @use8(i8 %a)
%r = trunc i8 %a to i6
ret i6 %r
}
; negative test - must be operand 1
define i8 @demand_low_bits_uses_commute(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @demand_low_bits_uses_commute(
; CHECK-NEXT: [[M:%.*]] = and i8 [[X:%.*]], -64
; CHECK-NEXT: [[A:%.*]] = sub i8 [[M]], [[Y:%.*]]
; CHECK-NEXT: call void @use8(i8 [[A]])
; CHECK-NEXT: [[S:%.*]] = sub i8 [[A]], [[Z:%.*]]
; CHECK-NEXT: [[R:%.*]] = shl i8 [[S]], 2
; CHECK-NEXT: ret i8 [[R]]
;
%m = and i8 %x, -64 ; 0xC0
%a = sub i8 %m, %y
call void @use8(i8 %a)
%s = sub i8 %a, %z
%r = shl i8 %s, 2
ret i8 %r
}
; sub becomes negate and combines with shl
define i8 @shrink_sub_from_constant_lowbits(i8 %x) {
; CHECK-LABEL: @shrink_sub_from_constant_lowbits(
; CHECK-NEXT: [[X000_NEG:%.*]] = mul i8 [[X:%.*]], -8
; CHECK-NEXT: ret i8 [[X000_NEG]]
;
%x000 = shl i8 %x, 3 ; 3 low bits are known zero
%sub = sub i8 7, %x000
%r = and i8 %sub, -8 ; 3 low bits are not demanded
ret i8 %r
}
; negative test - extra use prevents shrinking '7'
define i8 @shrink_sub_from_constant_lowbits_uses(i8 %x) {
; CHECK-LABEL: @shrink_sub_from_constant_lowbits_uses(
; CHECK-NEXT: [[X000:%.*]] = shl i8 [[X:%.*]], 3
; CHECK-NEXT: [[SUB:%.*]] = sub i8 7, [[X000]]
; CHECK-NEXT: call void @use8(i8 [[SUB]])
; CHECK-NEXT: [[R:%.*]] = and i8 [[SUB]], -8
; CHECK-NEXT: ret i8 [[R]]
;
%x000 = shl i8 %x, 3 ; 3 low bits are known zero
%sub = sub i8 7, %x000
call void @use8(i8 %sub)
%r = and i8 %sub, -8 ; 3 low bits are not demanded
ret i8 %r
}
; safe to clear 3 low bits (2 higher bits remain set)
define i8 @shrink_sub_from_constant_lowbits2(i8 %x) {
; CHECK-LABEL: @shrink_sub_from_constant_lowbits2(
; CHECK-NEXT: [[X000:%.*]] = and i8 [[X:%.*]], -8
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 24, [[X000]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[SUB]], -16
; CHECK-NEXT: ret i8 [[R]]
;
%x000 = and i8 %x, -8 ; 3 low bits are known zero
%sub = sub nsw i8 30, %x000 ; 0b0001_1110
%r = and i8 %sub, -16 ; 4 low bits are not demanded
ret i8 %r
}
; safe to clear 3 low bits (2 higher bits remain set)
define <2 x i8> @shrink_sub_from_constant_lowbits3(<2 x i8> %x) {
; CHECK-LABEL: @shrink_sub_from_constant_lowbits3(
; CHECK-NEXT: [[X0000:%.*]] = shl <2 x i8> [[X:%.*]], <i8 4, i8 4>
; CHECK-NEXT: [[SUB:%.*]] = sub nuw <2 x i8> <i8 24, i8 24>, [[X0000]]
; CHECK-NEXT: [[R:%.*]] = lshr exact <2 x i8> [[SUB]], <i8 3, i8 3>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%x0000 = shl <2 x i8> %x, <i8 4, i8 4> ; 4 low bits are known zero
%sub = sub nuw <2 x i8> <i8 31, i8 31>, %x0000
%r = lshr <2 x i8> %sub, <i8 3, i8 3> ; 3 low bits are not demanded
ret <2 x i8> %r
}
; eliminate the mask of y or the mask of the result
define i8 @demand_sub_from_variable_lowbits(i8 %x, i8 %y) {
; CHECK-LABEL: @demand_sub_from_variable_lowbits(
; CHECK-NEXT: [[X000:%.*]] = shl i8 [[X:%.*]], 3
; CHECK-NEXT: [[SUB:%.*]] = sub i8 [[Y:%.*]], [[X000]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[SUB]], -8
; CHECK-NEXT: ret i8 [[R]]
;
%x000 = shl i8 %x, 3 ; 3 low bits are known zero
%y000 = and i8 %y, -8
%sub = sub i8 %y000, %x000
%r = and i8 %sub, -8 ; 3 low bits are not demanded
ret i8 %r
}
; setting the low 3 bits of y doesn't change anything
define i8 @demand_sub_from_variable_lowbits2(i8 %x, i8 %y) {
; CHECK-LABEL: @demand_sub_from_variable_lowbits2(
; CHECK-NEXT: [[X0000:%.*]] = shl i8 [[X:%.*]], 4
; CHECK-NEXT: [[SUB:%.*]] = sub nuw nsw i8 [[Y:%.*]], [[X0000]]
; CHECK-NEXT: [[R:%.*]] = lshr i8 [[SUB]], 4
; CHECK-NEXT: ret i8 [[R]]
;
%x0000 = shl i8 %x, 4 ; 4 low bits are known zero
%y111 = or i8 %y, 7
%sub = sub nsw nuw i8 %y111, %x0000
%r = lshr i8 %sub, 4 ; 4 low bits are not demanded
ret i8 %r
}
; negative test - the mask of y removes an extra bit, so that instruction is needed
define i8 @demand_sub_from_variable_lowbits3(i8 %x, i8 %y) {
; CHECK-LABEL: @demand_sub_from_variable_lowbits3(
; CHECK-NEXT: [[X0000:%.*]] = shl i8 [[X:%.*]], 4
; CHECK-NEXT: [[Y00000:%.*]] = and i8 [[Y:%.*]], -32
; CHECK-NEXT: [[SUB:%.*]] = sub i8 [[Y00000]], [[X0000]]
; CHECK-NEXT: [[R:%.*]] = lshr exact i8 [[SUB]], 4
; CHECK-NEXT: ret i8 [[R]]
;
%x0000 = shl i8 %x, 4 ; 4 low bits are known zero
%y00000 = and i8 %y, -32
%sub = sub i8 %y00000, %x0000
%r = lshr i8 %sub, 4 ; 4 low bits are not demanded
ret i8 %r
}
; C - ((C3 - X) & C2) --> (C - (C2 & C3)) + (X & C2) when:
; (C3 - ((C2 & C3) - 1)) is pow2
; ((C2 + C3) & ((C2 & C3) - 1)) == ((C2 & C3) - 1)
; C2 is negative pow2
define i10 @sub_to_and_nuw(i10 %x) {
; CHECK-LABEL: @sub_to_and_nuw(
; CHECK-NEXT: [[TMP1:%.*]] = and i10 [[X:%.*]], 120
; CHECK-NEXT: [[R:%.*]] = add nuw nsw i10 [[TMP1]], 379
; CHECK-NEXT: ret i10 [[R]]
;
%sub = sub nuw i10 71, %x
%and = and i10 %sub, 120
%r = sub i10 443, %and
ret i10 %r
}
; C - ((C3 -nuw X) & C2) --> (C - (C2 & C3)) + (X & C2) when:
; (C3 - ((C2 & C3) - 1)) is pow2
; ((C2 + C3) & ((C2 & C3) - 1)) == ((C2 & C3) - 1)
define i10 @sub_to_and_negpow2(i10 %x) {
; CHECK-LABEL: @sub_to_and_negpow2(
; CHECK-NEXT: [[TMP1:%.*]] = and i10 [[X:%.*]], -8
; CHECK-NEXT: [[R:%.*]] = add i10 [[TMP1]], -31
; CHECK-NEXT: ret i10 [[R]]
;
%sub = sub i10 71, %x
%and = and i10 %sub, -8
%r = sub i10 33, %and
ret i10 %r
}
; TODO:
; C + ((C3 -nuw X) & C2) --> (C + (C2 & C3)) - (X & C2) when:
define i10 @add_to_and_nuw(i10 %x) {
; CHECK-LABEL: @add_to_and_nuw(
; CHECK-NEXT: [[SUB:%.*]] = sub nuw i10 71, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i10 [[SUB]], 120
; CHECK-NEXT: [[R:%.*]] = add nuw nsw i10 [[AND]], 224
; CHECK-NEXT: ret i10 [[R]]
;
%sub = sub nuw i10 71, %x
%and = and i10 %sub, 120
%r = add i10 224, %and
ret i10 %r
}
; (C3 - (C2 & C3) + 1) is not pow2
define i10 @sub_to_and_negative1(i10 %x) {
; CHECK-LABEL: @sub_to_and_negative1(
; CHECK-NEXT: [[SUB:%.*]] = sub i10 71, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i10 [[SUB]], 248
; CHECK-NEXT: [[R:%.*]] = sub nuw nsw i10 444, [[AND]]
; CHECK-NEXT: ret i10 [[R]]
;
%sub = sub nuw i10 327, %x
%and = and i10 %sub, 248
%r = sub i10 444, %and
ret i10 %r
}
; ((C2 + C3) & ((C2 & C3) - 1)) == ((C2 & C3) - 1)
define i10 @sub_to_and_negative2(i10 %x) {
; CHECK-LABEL: @sub_to_and_negative2(
; CHECK-NEXT: [[SUB:%.*]] = sub nuw i10 71, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i10 [[SUB]], 88
; CHECK-NEXT: [[R:%.*]] = sub nsw i10 64, [[AND]]
; CHECK-NEXT: ret i10 [[R]]
;
%sub = sub nuw i10 71, %x
%and = and i10 %sub, 88
%r = sub i10 64, %and
ret i10 %r
}
; no nuw && C2 is not neg-pow2
define i10 @sub_to_and_negative3(i10 %x) {
; CHECK-LABEL: @sub_to_and_negative3(
; CHECK-NEXT: [[SUB:%.*]] = sub i10 71, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i10 [[SUB]], 120
; CHECK-NEXT: [[R:%.*]] = sub nsw i10 64, [[AND]]
; CHECK-NEXT: ret i10 [[R]]
;
%sub = sub i10 71, %x
%and = and i10 %sub, 120
%r = sub i10 64, %and
ret i10 %r
}
declare void @use10(i10)
; and is not one-use
define i10 @sub_to_and_negative4(i10 %x) {
; CHECK-LABEL: @sub_to_and_negative4(
; CHECK-NEXT: [[SUB:%.*]] = sub i10 71, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i10 [[SUB]], 120
; CHECK-NEXT: [[R:%.*]] = sub nsw i10 64, [[AND]]
; CHECK-NEXT: call void @use10(i10 [[AND]])
; CHECK-NEXT: ret i10 [[R]]
;
%sub = sub i10 71, %x
%and = and i10 %sub, 120
%r = sub i10 64, %and
call void @use10(i10 %and)
ret i10 %r
}
define <2 x i8> @sub_to_and_vector1(<2 x i8> %x) {
; CHECK-LABEL: @sub_to_and_vector1(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], <i8 120, i8 120>
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i8> [[TMP1]], <i8 -9, i8 -9>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%sub = sub nuw <2 x i8> <i8 71, i8 71>, %x
%and = and <2 x i8> %sub, <i8 120, i8 120>
%r = sub <2 x i8> <i8 55, i8 55>, %and
ret <2 x i8> %r
}
define <2 x i8> @sub_to_and_vector2(<2 x i8> %x) {
; CHECK-LABEL: @sub_to_and_vector2(
; CHECK-NEXT: [[SUB:%.*]] = sub nuw <2 x i8> <i8 71, i8 poison>, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> [[SUB]], <i8 120, i8 120>
; CHECK-NEXT: [[R:%.*]] = sub nsw <2 x i8> <i8 77, i8 77>, [[AND]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%sub = sub nuw <2 x i8> <i8 71, i8 poison>, %x
%and = and <2 x i8> %sub, <i8 120, i8 120>
%r = sub <2 x i8> <i8 77, i8 77>, %and
ret <2 x i8> %r
}
define <2 x i8> @sub_to_and_vector3(<2 x i8> %x) {
; CHECK-LABEL: @sub_to_and_vector3(
; CHECK-NEXT: [[SUB:%.*]] = sub nuw <2 x i8> <i8 71, i8 71>, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> [[SUB]], <i8 120, i8 poison>
; CHECK-NEXT: [[R:%.*]] = sub nsw <2 x i8> <i8 44, i8 44>, [[AND]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%sub = sub nuw <2 x i8> <i8 71, i8 71>, %x
%and = and <2 x i8> %sub, <i8 120, i8 poison>
%r = sub <2 x i8> <i8 44, i8 44>, %and
ret <2 x i8> %r
}
define <2 x i8> @sub_to_and_vector4(<2 x i8> %x) {
; CHECK-LABEL: @sub_to_and_vector4(
; CHECK-NEXT: [[SUB:%.*]] = sub nuw <2 x i8> <i8 71, i8 71>, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> [[SUB]], <i8 120, i8 120>
; CHECK-NEXT: [[R:%.*]] = sub nsw <2 x i8> <i8 88, i8 poison>, [[AND]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%sub = sub nuw <2 x i8> <i8 71, i8 71>, %x
%and = and <2 x i8> %sub, <i8 120, i8 120>
%r = sub <2 x i8> <i8 88, i8 poison>, %and
ret <2 x i8> %r
}
; (X * X) - (Y * Y) --> (X + Y) * (X - Y)
define i8 @diff_of_squares(i8 %x, i8 %y) {
; CHECK-LABEL: @diff_of_squares(
; CHECK-NEXT: [[ADD:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub i8 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = mul i8 [[ADD]], [[SUB]]
; CHECK-NEXT: ret i8 [[R]]
;
%x2 = mul i8 %x, %x
%y2 = mul i8 %y, %y
%r = sub i8 %x2, %y2
ret i8 %r
}
; All-or-nothing for propagation of no-wrap flags (possibly conservative)
define i5 @diff_of_squares_nuw(i5 %x, i5 %y) {
; CHECK-LABEL: @diff_of_squares_nuw(
; CHECK-NEXT: [[ADD:%.*]] = add nuw i5 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub nuw i5 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = mul nuw i5 [[ADD]], [[SUB]]
; CHECK-NEXT: ret i5 [[R]]
;
%x2 = mul nuw i5 %x, %x
%y2 = mul nuw i5 %y, %y
%r = sub nuw i5 %x2, %y2
ret i5 %r
}
; All-or-nothing for propagation of no-wrap flags (possibly conservative)
define i5 @diff_of_squares_partial_nuw(i5 %x, i5 %y) {
; CHECK-LABEL: @diff_of_squares_partial_nuw(
; CHECK-NEXT: [[ADD:%.*]] = add i5 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub i5 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = mul i5 [[ADD]], [[SUB]]
; CHECK-NEXT: ret i5 [[R]]
;
%x2 = mul nuw i5 %x, %x
%y2 = mul nuw i5 %y, %y
%r = sub i5 %x2, %y2
ret i5 %r
}
; All-or-nothing for propagation of no-wrap flags (possibly conservative)
define <2 x i5> @diff_of_squares_nsw(<2 x i5> %x, <2 x i5> %y) {
; CHECK-LABEL: @diff_of_squares_nsw(
; CHECK-NEXT: [[ADD:%.*]] = add nsw <2 x i5> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub nsw <2 x i5> [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = mul nsw <2 x i5> [[ADD]], [[SUB]]
; CHECK-NEXT: ret <2 x i5> [[R]]
;
%x2 = mul nsw <2 x i5> %x, %x
%y2 = mul nsw <2 x i5> %y, %y
%r = sub nsw <2 x i5> %x2, %y2
ret <2 x i5> %r
}
; All-or-nothing for propagation of no-wrap flags (possibly conservative)
define <2 x i5> @diff_of_squares_partial_nsw(<2 x i5> %x, <2 x i5> %y) {
; CHECK-LABEL: @diff_of_squares_partial_nsw(
; CHECK-NEXT: [[ADD:%.*]] = add <2 x i5> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub <2 x i5> [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = mul <2 x i5> [[ADD]], [[SUB]]
; CHECK-NEXT: ret <2 x i5> [[R]]
;
%x2 = mul nsw <2 x i5> %x, %x
%y2 = mul <2 x i5> %y, %y
%r = sub nsw <2 x i5> %x2, %y2
ret <2 x i5> %r
}
define i1 @diff_of_squares_nsw_i1(i1 %x, i1 %y) {
; CHECK-LABEL: @diff_of_squares_nsw_i1(
; CHECK-NEXT: ret i1 false
;
%x2 = mul nsw i1 %x, %x
%y2 = mul nsw i1 %y, %y
%r = sub nsw i1 %x2, %y2
ret i1 %r
}
define i1 @diff_of_squares_nuw_i1(i1 %x, i1 %y) {
; CHECK-LABEL: @diff_of_squares_nuw_i1(
; CHECK-NEXT: [[R:%.*]] = xor i1 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i1 [[R]]
;
%x2 = mul nuw i1 %x, %x
%y2 = mul nuw i1 %y, %y
%r = sub nuw i1 %x2, %y2
ret i1 %r
}
; It is not correct to propagate nsw.
; TODO: This should reduce more.
define i2 @diff_of_squares_nsw_i2(i2 %x, i2 %y) {
; CHECK-LABEL: @diff_of_squares_nsw_i2(
; CHECK-NEXT: [[ADD:%.*]] = add i2 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub i2 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = mul i2 [[ADD]], [[SUB]]
; CHECK-NEXT: ret i2 [[R]]
;
%x2 = mul nsw i2 %x, %x
%y2 = mul nsw i2 %y, %y
%r = sub nsw i2 %x2, %y2
ret i2 %r
}
; TODO: This should reduce more.
define i2 @diff_of_squares_nuw_i2(i2 %x, i2 %y) {
; CHECK-LABEL: @diff_of_squares_nuw_i2(
; CHECK-NEXT: [[ADD:%.*]] = add nuw i2 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = sub nuw i2 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = mul nuw i2 [[ADD]], [[SUB]]
; CHECK-NEXT: ret i2 [[R]]
;
%x2 = mul nuw i2 %x, %x
%y2 = mul nuw i2 %y, %y
%r = sub nuw i2 %x2, %y2
ret i2 %r
}
; negative test
define i8 @diff_of_squares_use1(i8 %x, i8 %y) {
; CHECK-LABEL: @diff_of_squares_use1(
; CHECK-NEXT: [[X2:%.*]] = mul i8 [[X:%.*]], [[X]]
; CHECK-NEXT: call void @use8(i8 [[X2]])
; CHECK-NEXT: [[Y2:%.*]] = mul i8 [[Y:%.*]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = sub i8 [[X2]], [[Y2]]
; CHECK-NEXT: ret i8 [[R]]
;
%x2 = mul i8 %x, %x
call void @use8(i8 %x2)
%y2 = mul i8 %y, %y
%r = sub i8 %x2, %y2
ret i8 %r
}
; negative test
define i8 @diff_of_squares_use2(i8 %x, i8 %y) {
; CHECK-LABEL: @diff_of_squares_use2(
; CHECK-NEXT: [[X2:%.*]] = mul i8 [[X:%.*]], [[X]]
; CHECK-NEXT: [[Y2:%.*]] = mul i8 [[Y:%.*]], [[Y]]
; CHECK-NEXT: call void @use8(i8 [[Y2]])
; CHECK-NEXT: [[R:%.*]] = sub i8 [[X2]], [[Y2]]
; CHECK-NEXT: ret i8 [[R]]
;
%x2 = mul i8 %x, %x
%y2 = mul i8 %y, %y
call void @use8(i8 %y2)
%r = sub i8 %x2, %y2
ret i8 %r
}
; negative test - must be squares
define i8 @diff_of_muls1(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @diff_of_muls1(
; CHECK-NEXT: [[M:%.*]] = mul i8 [[X:%.*]], [[Z:%.*]]
; CHECK-NEXT: [[Y2:%.*]] = mul i8 [[Y:%.*]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = sub i8 [[M]], [[Y2]]
; CHECK-NEXT: ret i8 [[R]]
;
%m = mul i8 %x, %z
%y2 = mul i8 %y, %y
%r = sub i8 %m, %y2
ret i8 %r
}
; negative test - must be squares
define i8 @diff_of_muls2(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @diff_of_muls2(
; CHECK-NEXT: [[X2:%.*]] = mul i8 [[X:%.*]], [[X]]
; CHECK-NEXT: [[M:%.*]] = mul i8 [[Y:%.*]], [[Z:%.*]]
; CHECK-NEXT: [[R:%.*]] = sub i8 [[X2]], [[M]]
; CHECK-NEXT: ret i8 [[R]]
;
%x2 = mul i8 %x, %x
%m = mul i8 %y, %z
%r = sub i8 %x2, %m
ret i8 %r
}
define i8 @sub_of_adds_2xz_multiuse(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @sub_of_adds_2xz_multiuse(
; CHECK-NEXT: [[XZ:%.*]] = add i8 [[X:%.*]], [[Z:%.*]]
; CHECK-NEXT: [[YZ:%.*]] = add i8 [[Z]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = sub i8 [[X]], [[Y]]
; CHECK-NEXT: call void @use8(i8 [[XZ]])
; CHECK-NEXT: call void @use8(i8 [[YZ]])
; CHECK-NEXT: ret i8 [[R]]
;
%xz = add i8 %x, %z
%yz = add i8 %z, %y
%r = sub i8 %xz, %yz
call void @use8(i8 %xz)
call void @use8(i8 %yz)
ret i8 %r
}
define i8 @sub_of_adds_2xc_multiuse2_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @sub_of_adds_2xc_multiuse2_fail(
; CHECK-NEXT: [[XC:%.*]] = add i8 [[X:%.*]], 10
; CHECK-NEXT: [[YC:%.*]] = add i8 [[Y:%.*]], 11
; CHECK-NEXT: [[R:%.*]] = sub i8 [[XC]], [[YC]]
; CHECK-NEXT: call void @use8(i8 [[XC]])
; CHECK-NEXT: call void @use8(i8 [[YC]])
; CHECK-NEXT: ret i8 [[R]]
;
%xc = add i8 %x, 10
%yc = add i8 %y, 11
%r = sub i8 %xc, %yc
call void @use8(i8 %xc)
call void @use8(i8 %yc)
ret i8 %r
}
define i8 @sub_of_adds_2xc(i8 %x, i8 %y) {
; CHECK-LABEL: @sub_of_adds_2xc(
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = add i8 [[TMP1]], 2
; CHECK-NEXT: ret i8 [[R]]
;
%xc = add i8 %x, 10
%yc = add i8 %y, 8
%r = sub i8 %xc, %yc
ret i8 %r
}
define i32 @sub_infer_nuw_from_domcond(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_infer_nuw_from_domcond(
; CHECK-NEXT: [[COND_NOT:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SUB:%.*]] = sub nuw i32 [[X]], [[Y]]
; CHECK-NEXT: ret i32 [[SUB]]
; CHECK: if.else:
; CHECK-NEXT: ret i32 0
;
%cond = icmp uge i32 %x, %y
br i1 %cond, label %if.then, label %if.else
if.then:
%sub = sub i32 %x, %y
ret i32 %sub
if.else:
ret i32 0
}
define i1 @sub_infer_nuw_from_domcond_fold1(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_infer_nuw_from_domcond_fold1(
; CHECK-NEXT: [[COND_NOT:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: ret i1 false
; CHECK: if.else:
; CHECK-NEXT: ret i1 false
;
%cond = icmp uge i32 %x, %y
br i1 %cond, label %if.then, label %if.else
if.then:
%ext0 = zext i32 %y to i64
%ext1 = zext i32 %x to i64
%sub = sub i32 %x, %y
%ext2 = zext i32 %sub to i64
%add = add nuw nsw i64 %ext2, %ext0
%cmp = icmp ugt i64 %add, %ext1
ret i1 %cmp
if.else:
ret i1 false
}
define i64 @sub_infer_nuw_from_domcond_fold2(i32 range(i32 0, 2147483648) %x, i32 range(i32 0, 2147483648) %y) {
; CHECK-LABEL: @sub_infer_nuw_from_domcond_fold2(
; CHECK-NEXT: [[COND_NOT:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SUB:%.*]] = sub nuw nsw i32 [[X]], [[Y]]
; CHECK-NEXT: [[EXT:%.*]] = zext nneg i32 [[SUB]] to i64
; CHECK-NEXT: ret i64 [[EXT]]
; CHECK: if.else:
; CHECK-NEXT: ret i64 0
;
%cond = icmp uge i32 %x, %y
br i1 %cond, label %if.then, label %if.else
if.then:
%sub = sub i32 %x, %y
%ext = zext i32 %sub to i64
ret i64 %ext
if.else:
ret i64 0
}
define i1 @sub_infer_nuw_from_domcond_fold3(i16 %xx, i32 range(i32 0, 12) %y) {
; CHECK-LABEL: @sub_infer_nuw_from_domcond_fold3(
; CHECK-NEXT: [[X:%.*]] = zext i16 [[XX:%.*]] to i32
; CHECK-NEXT: [[COND:%.*]] = icmp ugt i32 [[Y:%.*]], [[X]]
; CHECK-NEXT: br i1 [[COND]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: ret i1 false
; CHECK: if.else:
; CHECK-NEXT: ret i1 false
;
%x = zext i16 %xx to i32
%cond = icmp ult i32 %x, %y
br i1 %cond, label %if.then, label %if.else
if.then:
%sub = sub nsw i32 %y, %x
%cmp = icmp eq i32 %sub, -1
ret i1 %cmp
if.else:
ret i1 false
}
; negative tests
define i32 @sub_infer_nuw_from_domcond_wrong_pred(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_infer_nuw_from_domcond_wrong_pred(
; CHECK-NEXT: [[COND_NOT:%.*]] = icmp slt i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: br i1 [[COND_NOT]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SUB:%.*]] = sub i32 [[X]], [[Y]]
; CHECK-NEXT: ret i32 [[SUB]]
; CHECK: if.else:
; CHECK-NEXT: ret i32 0
;
%cond = icmp sge i32 %x, %y
br i1 %cond, label %if.then, label %if.else
if.then:
%sub = sub i32 %x, %y
ret i32 %sub
if.else:
ret i32 0
}
define i32 @sub_infer_nuw_from_domcond_lhs_is_false(i32 %x, i32 %y) {
; CHECK-LABEL: @sub_infer_nuw_from_domcond_lhs_is_false(
; CHECK-NEXT: [[COND_NOT:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: br i1 [[COND_NOT]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SUB:%.*]] = sub i32 [[X]], [[Y]]
; CHECK-NEXT: ret i32 [[SUB]]
; CHECK: if.else:
; CHECK-NEXT: ret i32 0
;
%cond = icmp uge i32 %x, %y
br i1 %cond, label %if.else, label %if.then
if.then:
%sub = sub i32 %x, %y
ret i32 %sub
if.else:
ret i32 0
}
define i32 @fold_sub_and_into_andn(i32 %x) {
; CHECK-LABEL: @fold_sub_and_into_andn(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = and i32 [[X:%.*]], 63
; CHECK-NEXT: [[AND:%.*]] = xor i32 [[TMP0]], 63
; CHECK-NEXT: ret i32 [[AND]]
;
entry:
%sub = sub i32 63, %x
%and = and i32 %sub, 63
ret i32 %and
}
define i1 @fold_sub_and_into_andn_icmp(i32 %x) {
; CHECK-LABEL: @fold_sub_and_into_andn_icmp(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = and i32 [[X:%.*]], 63
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], 63
; CHECK-NEXT: ret i1 [[CMP]]
;
entry:
%sub = sub i32 63, %x
%and = and i32 %sub, 63
%cmp = icmp eq i32 %and, 0
ret i1 %cmp
}
define i32 @fold_sub_and_into_andn_subset(i32 %x) {
; CHECK-LABEL: @fold_sub_and_into_andn_subset(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = and i32 [[X:%.*]], 31
; CHECK-NEXT: [[AND:%.*]] = xor i32 [[TMP0]], 31
; CHECK-NEXT: ret i32 [[AND]]
;
entry:
%sub = sub i32 63, %x
%and = and i32 %sub, 31
ret i32 %and
}
; Negative tests
define i32 @fold_sub_and_into_andn_nonmask(i32 %x, i32 %y) {
; CHECK-LABEL: @fold_sub_and_into_andn_nonmask(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB:%.*]] = sub i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i32 [[SUB]], 63
; CHECK-NEXT: ret i32 [[AND]]
;
entry:
%sub = sub i32 %y, %x
%and = and i32 %sub, 63
ret i32 %and
}
define i32 @fold_sub_and_into_andn_superset(i32 %x) {
; CHECK-LABEL: @fold_sub_and_into_andn_superset(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB:%.*]] = sub i32 63, [[X:%.*]]
; CHECK-NEXT: [[AND:%.*]] = and i32 [[SUB]], 127
; CHECK-NEXT: ret i32 [[AND]]
;
entry:
%sub = sub i32 63, %x
%and = and i32 %sub, 127
ret i32 %and
}
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