; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
;
; Saturating addition.
;
declare i8 @llvm.uadd.sat.i8(i8, i8)
declare i8 @llvm.sadd.sat.i8(i8, i8)
declare <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8>, <2 x i8>)
declare <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8>, <2 x i8>)
; Constant uadd argument is canonicalized to the right.
define i8 @test_scalar_uadd_canonical(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_canonical(
; CHECK-NEXT: [[X:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[A:%.*]], i8 10)
; CHECK-NEXT: ret i8 [[X]]
;
%x = call i8 @llvm.uadd.sat.i8(i8 10, i8 %a)
ret i8 %x
}
define <2 x i8> @test_vector_uadd_canonical(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_canonical(
; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 10, i8 20>)
; CHECK-NEXT: ret <2 x i8> [[X]]
;
%x = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> <i8 10, i8 20>, <2 x i8> %a)
ret <2 x i8> %x
}
; Constant sadd argument is canonicalized to the right.
define i8 @test_scalar_sadd_canonical(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_canonical(
; CHECK-NEXT: [[X:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 -10)
; CHECK-NEXT: ret i8 [[X]]
;
%x = call i8 @llvm.sadd.sat.i8(i8 -10, i8 %a)
ret i8 %x
}
define <2 x i8> @test_vector_sadd_canonical(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_sadd_canonical(
; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 10, i8 -20>)
; CHECK-NEXT: ret <2 x i8> [[X]]
;
%x = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> <i8 10, i8 -20>, <2 x i8> %a)
ret <2 x i8> %x
}
; Can combine uadds with constant operands.
define i8 @test_scalar_uadd_combine(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_combine(
; CHECK-NEXT: [[X2:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[A:%.*]], i8 30)
; CHECK-NEXT: ret i8 [[X2]]
;
%x1 = call i8 @llvm.uadd.sat.i8(i8 %a, i8 10)
%x2 = call i8 @llvm.uadd.sat.i8(i8 %x1, i8 20)
ret i8 %x2
}
define <2 x i8> @test_vector_uadd_combine(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_combine(
; CHECK-NEXT: [[X2:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 30, i8 30>)
; CHECK-NEXT: ret <2 x i8> [[X2]]
;
%x1 = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 10>)
%x2 = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %x1, <2 x i8> <i8 20, i8 20>)
ret <2 x i8> %x2
}
; This could simplify, but currently doesn't.
define <2 x i8> @test_vector_uadd_combine_non_splat(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_combine_non_splat(
; CHECK-NEXT: [[X1:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 10, i8 20>)
; CHECK-NEXT: [[X2:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[X1]], <2 x i8> <i8 30, i8 40>)
; CHECK-NEXT: ret <2 x i8> [[X2]]
;
%x1 = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 20>)
%x2 = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %x1, <2 x i8> <i8 30, i8 40>)
ret <2 x i8> %x2
}
; Can combine uadds even if they overflow.
define i8 @test_scalar_uadd_overflow(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_overflow(
; CHECK-NEXT: ret i8 -1
;
%y1 = call i8 @llvm.uadd.sat.i8(i8 %a, i8 100)
%y2 = call i8 @llvm.uadd.sat.i8(i8 %y1, i8 200)
ret i8 %y2
}
define <2 x i8> @test_vector_uadd_overflow(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_overflow(
; CHECK-NEXT: ret <2 x i8> <i8 -1, i8 -1>
;
%y1 = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 100, i8 100>)
%y2 = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %y1, <2 x i8> <i8 200, i8 200>)
ret <2 x i8> %y2
}
; Can combine sadds if sign matches.
define i8 @test_scalar_sadd_both_positive(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_both_positive(
; CHECK-NEXT: [[Z2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 30)
; CHECK-NEXT: ret i8 [[Z2]]
;
%z1 = call i8 @llvm.sadd.sat.i8(i8 %a, i8 10)
%z2 = call i8 @llvm.sadd.sat.i8(i8 %z1, i8 20)
ret i8 %z2
}
define <2 x i8> @test_vector_sadd_both_positive(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_sadd_both_positive(
; CHECK-NEXT: [[Z2:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 30, i8 30>)
; CHECK-NEXT: ret <2 x i8> [[Z2]]
;
%z1 = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 10>)
%z2 = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> %z1, <2 x i8> <i8 20, i8 20>)
ret <2 x i8> %z2
}
define i8 @test_scalar_sadd_both_negative(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_both_negative(
; CHECK-NEXT: [[U2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 -30)
; CHECK-NEXT: ret i8 [[U2]]
;
%u1 = call i8 @llvm.sadd.sat.i8(i8 %a, i8 -10)
%u2 = call i8 @llvm.sadd.sat.i8(i8 %u1, i8 -20)
ret i8 %u2
}
define <2 x i8> @test_vector_sadd_both_negative(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_sadd_both_negative(
; CHECK-NEXT: [[U2:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 -30, i8 -30>)
; CHECK-NEXT: ret <2 x i8> [[U2]]
;
%u1 = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 -10, i8 -10>)
%u2 = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> %u1, <2 x i8> <i8 -20, i8 -20>)
ret <2 x i8> %u2
}
; Can't combine sadds if constants have different sign.
define i8 @test_scalar_sadd_different_sign(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_different_sign(
; CHECK-NEXT: [[V1:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 10)
; CHECK-NEXT: [[V2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[V1]], i8 -20)
; CHECK-NEXT: ret i8 [[V2]]
;
%v1 = call i8 @llvm.sadd.sat.i8(i8 %a, i8 10)
%v2 = call i8 @llvm.sadd.sat.i8(i8 %v1, i8 -20)
ret i8 %v2
}
; Can't combine sadds if they overflow.
define i8 @test_scalar_sadd_overflow(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_overflow(
; CHECK-NEXT: [[W1:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 100)
; CHECK-NEXT: [[W2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[W1]], i8 100)
; CHECK-NEXT: ret i8 [[W2]]
;
%w1 = call i8 @llvm.sadd.sat.i8(i8 %a, i8 100)
%w2 = call i8 @llvm.sadd.sat.i8(i8 %w1, i8 100)
ret i8 %w2
}
; neg uadd neg always overflows.
define i8 @test_scalar_uadd_neg_neg(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_neg_neg(
; CHECK-NEXT: ret i8 -1
;
%a_neg = or i8 %a, -128
%r = call i8 @llvm.uadd.sat.i8(i8 %a_neg, i8 -10)
ret i8 %r
}
define <2 x i8> @test_vector_uadd_neg_neg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_neg_neg(
; CHECK-NEXT: ret <2 x i8> <i8 -1, i8 -1>
;
%a_neg = or <2 x i8> %a, <i8 -128, i8 -128>
%r = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a_neg, <2 x i8> <i8 -10, i8 -20>)
ret <2 x i8> %r
}
; nneg uadd nneg never overflows.
define i8 @test_scalar_uadd_nneg_nneg(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_nneg_nneg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and i8 [[A:%.*]], 127
; CHECK-NEXT: [[R:%.*]] = add nuw i8 [[A_NNEG]], 10
; CHECK-NEXT: ret i8 [[R]]
;
%a_nneg = and i8 %a, 127
%r = call i8 @llvm.uadd.sat.i8(i8 %a_nneg, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_uadd_nneg_nneg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_nneg_nneg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and <2 x i8> [[A:%.*]], <i8 127, i8 127>
; CHECK-NEXT: [[R:%.*]] = add nuw <2 x i8> [[A_NNEG]], <i8 10, i8 20>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_nneg = and <2 x i8> %a, <i8 127, i8 127>
%r = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a_nneg, <2 x i8> <i8 10, i8 20>)
ret <2 x i8> %r
}
; neg uadd nneg might overflow.
define i8 @test_scalar_uadd_neg_nneg(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or i8 [[A:%.*]], -128
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[A_NEG]], i8 10)
; CHECK-NEXT: ret i8 [[R]]
;
%a_neg = or i8 %a, -128
%r = call i8 @llvm.uadd.sat.i8(i8 %a_neg, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_uadd_neg_nneg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or <2 x i8> [[A:%.*]], <i8 -128, i8 -128>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[A_NEG]], <2 x i8> <i8 10, i8 20>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_neg = or <2 x i8> %a, <i8 -128, i8 -128>
%r = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a_neg, <2 x i8> <i8 10, i8 20>)
ret <2 x i8> %r
}
define i8 @test_scalar_uadd_never_overflows(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_never_overflows(
; CHECK-NEXT: [[A_MASKED:%.*]] = and i8 [[A:%.*]], -127
; CHECK-NEXT: [[R:%.*]] = add nuw nsw i8 [[A_MASKED]], 1
; CHECK-NEXT: ret i8 [[R]]
;
%a_masked = and i8 %a, 129
%r = call i8 @llvm.uadd.sat.i8(i8 %a_masked, i8 1)
ret i8 %r
}
define <2 x i8> @test_vector_uadd_never_overflows(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_never_overflows(
; CHECK-NEXT: [[A_MASKED:%.*]] = and <2 x i8> [[A:%.*]], <i8 -127, i8 -127>
; CHECK-NEXT: [[R:%.*]] = add nuw nsw <2 x i8> [[A_MASKED]], <i8 1, i8 1>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_masked = and <2 x i8> %a, <i8 129, i8 129>
%r = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a_masked, <2 x i8> <i8 1, i8 1>)
ret <2 x i8> %r
}
define i8 @test_scalar_uadd_always_overflows(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_always_overflows(
; CHECK-NEXT: ret i8 -1
;
%a_masked = or i8 %a, 192
%r = call i8 @llvm.uadd.sat.i8(i8 %a_masked, i8 64)
ret i8 %r
}
define <2 x i8> @test_vector_uadd_always_overflows(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_uadd_always_overflows(
; CHECK-NEXT: ret <2 x i8> <i8 -1, i8 -1>
;
%a_masked = or <2 x i8> %a, <i8 192, i8 192>
%r = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> %a_masked, <2 x i8> <i8 64, i8 64>)
ret <2 x i8> %r
}
; neg sadd nneg never overflows.
define i8 @test_scalar_sadd_neg_nneg(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or i8 [[A:%.*]], -128
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[A_NEG]], 10
; CHECK-NEXT: ret i8 [[R]]
;
%a_neg = or i8 %a, -128
%r = call i8 @llvm.sadd.sat.i8(i8 %a_neg, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_sadd_neg_nneg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_sadd_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or <2 x i8> [[A:%.*]], <i8 -128, i8 -128>
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i8> [[A_NEG]], <i8 10, i8 20>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_neg = or <2 x i8> %a, <i8 -128, i8 -128>
%r = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> %a_neg, <2 x i8> <i8 10, i8 20>)
ret <2 x i8> %r
}
; nneg sadd neg never overflows.
define i8 @test_scalar_sadd_nneg_neg(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_nneg_neg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and i8 [[A:%.*]], 127
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[A_NNEG]], -10
; CHECK-NEXT: ret i8 [[R]]
;
%a_nneg = and i8 %a, 127
%r = call i8 @llvm.sadd.sat.i8(i8 %a_nneg, i8 -10)
ret i8 %r
}
define <2 x i8> @test_vector_sadd_nneg_neg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_sadd_nneg_neg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and <2 x i8> [[A:%.*]], <i8 127, i8 127>
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i8> [[A_NNEG]], <i8 -10, i8 -20>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_nneg = and <2 x i8> %a, <i8 127, i8 127>
%r = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> %a_nneg, <2 x i8> <i8 -10, i8 -20>)
ret <2 x i8> %r
}
; neg sadd neg might overflow.
define i8 @test_scalar_sadd_neg_neg(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_neg_neg(
; CHECK-NEXT: [[A_NEG:%.*]] = or i8 [[A:%.*]], -128
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A_NEG]], i8 -10)
; CHECK-NEXT: ret i8 [[R]]
;
%a_neg = or i8 %a, -128
%r = call i8 @llvm.sadd.sat.i8(i8 %a_neg, i8 -10)
ret i8 %r
}
define <2 x i8> @test_vector_sadd_neg_neg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_sadd_neg_neg(
; CHECK-NEXT: [[A_NEG:%.*]] = or <2 x i8> [[A:%.*]], <i8 -128, i8 -128>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A_NEG]], <2 x i8> <i8 -10, i8 -20>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_neg = or <2 x i8> %a, <i8 -128, i8 -128>
%r = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> %a_neg, <2 x i8> <i8 -10, i8 -20>)
ret <2 x i8> %r
}
define i8 @test_scalar_sadd_always_overflows_low(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_always_overflows_low(
; CHECK-NEXT: ret i8 -128
;
%cmp = icmp slt i8 %a, -120
%min = select i1 %cmp, i8 %a, i8 -120
%r = call i8 @llvm.sadd.sat.i8(i8 %min, i8 -10)
ret i8 %r
}
define i8 @test_scalar_sadd_always_overflows_high(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_always_overflows_high(
; CHECK-NEXT: ret i8 127
;
%cmp = icmp sgt i8 %a, 120
%max = select i1 %cmp, i8 %a, i8 120
%r = call i8 @llvm.sadd.sat.i8(i8 %max, i8 10)
ret i8 %r
}
; While this is a no-overflow condition, the nuw flag gets lost due to
; canonicalization and we can no longer determine this
define i8 @test_scalar_uadd_sub_nuw_lost_no_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_sub_nuw_lost_no_ov(
; CHECK-NEXT: [[B:%.*]] = add i8 [[A:%.*]], -10
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[B]], i8 9)
; CHECK-NEXT: ret i8 [[R]]
;
%b = sub nuw i8 %a, 10
%r = call i8 @llvm.uadd.sat.i8(i8 %b, i8 9)
ret i8 %r
}
define i8 @test_scalar_uadd_urem_no_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_urem_no_ov(
; CHECK-NEXT: [[B:%.*]] = urem i8 [[A:%.*]], 100
; CHECK-NEXT: [[R:%.*]] = add nuw nsw i8 [[B]], -100
; CHECK-NEXT: ret i8 [[R]]
;
%b = urem i8 %a, 100
%r = call i8 @llvm.uadd.sat.i8(i8 %b, i8 156)
ret i8 %r
}
define i8 @test_scalar_uadd_urem_may_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_urem_may_ov(
; CHECK-NEXT: [[B:%.*]] = urem i8 [[A:%.*]], 100
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[B]], i8 -99)
; CHECK-NEXT: ret i8 [[R]]
;
%b = urem i8 %a, 100
%r = call i8 @llvm.uadd.sat.i8(i8 %b, i8 157)
ret i8 %r
}
; We have a constant range for the LHS, but only known bits for the RHS
define i8 @test_scalar_uadd_udiv_known_bits(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_uadd_udiv_known_bits(
; CHECK-NEXT: [[AA:%.*]] = udiv i8 -66, [[A:%.*]]
; CHECK-NEXT: [[BB:%.*]] = and i8 [[B:%.*]], 63
; CHECK-NEXT: [[R:%.*]] = add nuw i8 [[AA]], [[BB]]
; CHECK-NEXT: ret i8 [[R]]
;
%aa = udiv i8 190, %a
%bb = and i8 %b, 63
%r = call i8 @llvm.uadd.sat.i8(i8 %aa, i8 %bb)
ret i8 %r
}
define i8 @test_scalar_sadd_srem_no_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_srem_no_ov(
; CHECK-NEXT: [[B:%.*]] = srem i8 [[A:%.*]], 100
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[B]], 28
; CHECK-NEXT: ret i8 [[R]]
;
%b = srem i8 %a, 100
%r = call i8 @llvm.sadd.sat.i8(i8 %b, i8 28)
ret i8 %r
}
define i8 @test_scalar_sadd_srem_may_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_srem_may_ov(
; CHECK-NEXT: [[B:%.*]] = srem i8 [[A:%.*]], 100
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[B]], i8 29)
; CHECK-NEXT: ret i8 [[R]]
;
%b = srem i8 %a, 100
%r = call i8 @llvm.sadd.sat.i8(i8 %b, i8 29)
ret i8 %r
}
define i8 @test_scalar_sadd_srem_and_no_ov(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_sadd_srem_and_no_ov(
; CHECK-NEXT: [[AA:%.*]] = srem i8 [[A:%.*]], 100
; CHECK-NEXT: [[BB:%.*]] = and i8 [[B:%.*]], 15
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[AA]], [[BB]]
; CHECK-NEXT: ret i8 [[R]]
;
%aa = srem i8 %a, 100
%bb = and i8 %b, 15
%r = call i8 @llvm.sadd.sat.i8(i8 %aa, i8 %bb)
ret i8 %r
}
;
; Saturating subtraction.
;
declare i8 @llvm.usub.sat.i8(i8, i8)
declare i8 @llvm.ssub.sat.i8(i8, i8)
declare <2 x i8> @llvm.usub.sat.v2i8(<2 x i8>, <2 x i8>)
declare <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8>, <2 x i8>)
; Cannot canonicalize usub to uadd.
define i8 @test_scalar_usub_canonical(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_canonical(
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 10)
; CHECK-NEXT: ret i8 [[R]]
;
%r = call i8 @llvm.usub.sat.i8(i8 %a, i8 10)
ret i8 %r
}
; Canonicalize ssub to sadd.
define i8 @test_scalar_ssub_canonical(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_canonical(
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 -10)
; CHECK-NEXT: ret i8 [[R]]
;
%r = call i8 @llvm.ssub.sat.i8(i8 %a, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_ssub_canonical(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_canonical(
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 -10, i8 -10>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 10>)
ret <2 x i8> %r
}
define <2 x i8> @test_vector_ssub_canonical_min_non_splat(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_canonical_min_non_splat(
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 -10, i8 10>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 -10>)
ret <2 x i8> %r
}
; Cannot canonicalize signed min.
define i8 @test_scalar_ssub_canonical_min(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_canonical_min(
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.ssub.sat.i8(i8 [[A:%.*]], i8 -128)
; CHECK-NEXT: ret i8 [[R]]
;
%r = call i8 @llvm.ssub.sat.i8(i8 %a, i8 -128)
ret i8 %r
}
define <2 x i8> @test_vector_ssub_canonical_min(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_canonical_min(
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 -128, i8 -10>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 -128, i8 -10>)
ret <2 x i8> %r
}
; Can combine usubs with constant operands.
define i8 @test_scalar_usub_combine(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_combine(
; CHECK-NEXT: [[X2:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 30)
; CHECK-NEXT: ret i8 [[X2]]
;
%x1 = call i8 @llvm.usub.sat.i8(i8 %a, i8 10)
%x2 = call i8 @llvm.usub.sat.i8(i8 %x1, i8 20)
ret i8 %x2
}
; Can simplify zero check followed by decrement
define i8 @test_simplify_decrement(i8 %a) {
; CHECK-LABEL: @test_simplify_decrement(
; CHECK-NEXT: [[I2:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 1)
; CHECK-NEXT: ret i8 [[I2]]
;
%i = icmp eq i8 %a, 0
%i1 = sub i8 %a, 1
%i2 = select i1 %i, i8 0, i8 %i1
ret i8 %i2
}
declare void @use.i1(i1)
define i8 @test_simplify_decrement_ne(i8 %a) {
; CHECK-LABEL: @test_simplify_decrement_ne(
; CHECK-NEXT: [[I:%.*]] = icmp ne i8 [[A:%.*]], 0
; CHECK-NEXT: call void @use.i1(i1 [[I]])
; CHECK-NEXT: [[I2:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A]], i8 1)
; CHECK-NEXT: ret i8 [[I2]]
;
%i = icmp ne i8 %a, 0
call void @use.i1(i1 %i)
%i1 = add i8 %a, -1
%i2 = select i1 %i, i8 %i1, i8 0
ret i8 %i2
}
define <2 x i8> @test_simplify_decrement_vec(<2 x i8> %a) {
; CHECK-LABEL: @test_simplify_decrement_vec(
; CHECK-NEXT: [[I2:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 1, i8 1>)
; CHECK-NEXT: ret <2 x i8> [[I2]]
;
%i = icmp eq <2 x i8> %a, <i8 0, i8 0>
%i1 = sub <2 x i8> %a, <i8 1, i8 1>
%i2 = select <2 x i1> %i, <2 x i8> <i8 0, i8 0>, <2 x i8> %i1
ret <2 x i8> %i2
}
define <2 x i8> @test_simplify_decrement_vec_poison(<2 x i8> %a) {
; CHECK-LABEL: @test_simplify_decrement_vec_poison(
; CHECK-NEXT: [[I2:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 1, i8 1>)
; CHECK-NEXT: ret <2 x i8> [[I2]]
;
%i = icmp eq <2 x i8> %a, <i8 0, i8 0>
%i1 = sub <2 x i8> %a, <i8 1, i8 1>
%i2 = select <2 x i1> %i, <2 x i8> <i8 0, i8 poison>, <2 x i8> %i1
ret <2 x i8> %i2
}
define i8 @test_simplify_decrement_invalid_ne(i8 %a) {
; CHECK-LABEL: @test_simplify_decrement_invalid_ne(
; CHECK-NEXT: [[I_NOT:%.*]] = icmp eq i8 [[A:%.*]], 0
; CHECK-NEXT: [[I2:%.*]] = sext i1 [[I_NOT]] to i8
; CHECK-NEXT: ret i8 [[I2]]
;
%i = icmp ne i8 %a, 0
%i1 = sub i8 %a, 1
%i2 = select i1 %i, i8 0, i8 %i1
ret i8 %i2
}
define i8 @test_invalid_simplify_sub2(i8 %a) {
; CHECK-LABEL: @test_invalid_simplify_sub2(
; CHECK-NEXT: [[I:%.*]] = icmp eq i8 [[A:%.*]], 0
; CHECK-NEXT: [[I1:%.*]] = add i8 [[A]], -2
; CHECK-NEXT: [[I2:%.*]] = select i1 [[I]], i8 0, i8 [[I1]]
; CHECK-NEXT: ret i8 [[I2]]
;
%i = icmp eq i8 %a, 0
%i1 = sub i8 %a, 2
%i2 = select i1 %i, i8 0, i8 %i1
ret i8 %i2
}
define i8 @test_invalid_simplify_eq2(i8 %a) {
; CHECK-LABEL: @test_invalid_simplify_eq2(
; CHECK-NEXT: [[I:%.*]] = icmp eq i8 [[A:%.*]], 2
; CHECK-NEXT: [[I1:%.*]] = add i8 [[A]], -1
; CHECK-NEXT: [[I2:%.*]] = select i1 [[I]], i8 0, i8 [[I1]]
; CHECK-NEXT: ret i8 [[I2]]
;
%i = icmp eq i8 %a, 2
%i1 = sub i8 %a, 1
%i2 = select i1 %i, i8 0, i8 %i1
ret i8 %i2
}
define i8 @test_invalid_simplify_select_1(i8 %a) {
; CHECK-LABEL: @test_invalid_simplify_select_1(
; CHECK-NEXT: [[I:%.*]] = icmp eq i8 [[A:%.*]], 0
; CHECK-NEXT: [[I1:%.*]] = add i8 [[A]], -1
; CHECK-NEXT: [[I2:%.*]] = select i1 [[I]], i8 1, i8 [[I1]]
; CHECK-NEXT: ret i8 [[I2]]
;
%i = icmp eq i8 %a, 0
%i1 = sub i8 %a, 1
%i2 = select i1 %i, i8 1, i8 %i1
ret i8 %i2
}
define i8 @test_invalid_simplify_other(i8 %a, i8 %b) {
; CHECK-LABEL: @test_invalid_simplify_other(
; CHECK-NEXT: [[I:%.*]] = icmp eq i8 [[A:%.*]], 0
; CHECK-NEXT: [[I1:%.*]] = add i8 [[B:%.*]], -1
; CHECK-NEXT: [[I2:%.*]] = select i1 [[I]], i8 0, i8 [[I1]]
; CHECK-NEXT: ret i8 [[I2]]
;
%i = icmp eq i8 %a, 0
%i1 = sub i8 %b, 1
%i2 = select i1 %i, i8 0, i8 %i1
ret i8 %i2
}
define <2 x i8> @test_vector_usub_combine(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_combine(
; CHECK-NEXT: [[X2:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 30, i8 30>)
; CHECK-NEXT: ret <2 x i8> [[X2]]
;
%x1 = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 10>)
%x2 = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %x1, <2 x i8> <i8 20, i8 20>)
ret <2 x i8> %x2
}
; This could simplify, but currently doesn't.
define <2 x i8> @test_vector_usub_combine_non_splat(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_combine_non_splat(
; CHECK-NEXT: [[X1:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 10, i8 20>)
; CHECK-NEXT: [[X2:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[X1]], <2 x i8> <i8 30, i8 40>)
; CHECK-NEXT: ret <2 x i8> [[X2]]
;
%x1 = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 20>)
%x2 = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %x1, <2 x i8> <i8 30, i8 40>)
ret <2 x i8> %x2
}
; Can combine usubs even if they overflow.
define i8 @test_scalar_usub_overflow(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_overflow(
; CHECK-NEXT: ret i8 0
;
%y1 = call i8 @llvm.usub.sat.i8(i8 %a, i8 100)
%y2 = call i8 @llvm.usub.sat.i8(i8 %y1, i8 200)
ret i8 %y2
}
define <2 x i8> @test_vector_usub_overflow(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_overflow(
; CHECK-NEXT: ret <2 x i8> zeroinitializer
;
%y1 = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 100, i8 100>)
%y2 = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %y1, <2 x i8> <i8 200, i8 200>)
ret <2 x i8> %y2
}
; Can combine ssubs if sign matches.
define i8 @test_scalar_ssub_both_positive(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_both_positive(
; CHECK-NEXT: [[Z2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 -30)
; CHECK-NEXT: ret i8 [[Z2]]
;
%z1 = call i8 @llvm.ssub.sat.i8(i8 %a, i8 10)
%z2 = call i8 @llvm.ssub.sat.i8(i8 %z1, i8 20)
ret i8 %z2
}
define <2 x i8> @test_vector_ssub_both_positive(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_both_positive(
; CHECK-NEXT: [[Z2:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 -30, i8 -30>)
; CHECK-NEXT: ret <2 x i8> [[Z2]]
;
%z1 = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 10, i8 10>)
%z2 = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %z1, <2 x i8> <i8 20, i8 20>)
ret <2 x i8> %z2
}
define i8 @test_scalar_ssub_both_negative(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_both_negative(
; CHECK-NEXT: [[U2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 30)
; CHECK-NEXT: ret i8 [[U2]]
;
%u1 = call i8 @llvm.ssub.sat.i8(i8 %a, i8 -10)
%u2 = call i8 @llvm.ssub.sat.i8(i8 %u1, i8 -20)
ret i8 %u2
}
define <2 x i8> @test_vector_ssub_both_negative(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_both_negative(
; CHECK-NEXT: [[U2:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 30, i8 30>)
; CHECK-NEXT: ret <2 x i8> [[U2]]
;
%u1 = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a, <2 x i8> <i8 -10, i8 -10>)
%u2 = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %u1, <2 x i8> <i8 -20, i8 -20>)
ret <2 x i8> %u2
}
; Can't combine ssubs if constants have different sign.
define i8 @test_scalar_ssub_different_sign(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_different_sign(
; CHECK-NEXT: [[V1:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 -10)
; CHECK-NEXT: [[V2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[V1]], i8 20)
; CHECK-NEXT: ret i8 [[V2]]
;
%v1 = call i8 @llvm.ssub.sat.i8(i8 %a, i8 10)
%v2 = call i8 @llvm.ssub.sat.i8(i8 %v1, i8 -20)
ret i8 %v2
}
; Can combine sadd and ssub with appropriate signs.
define i8 @test_scalar_sadd_ssub(i8 %a) {
; CHECK-LABEL: @test_scalar_sadd_ssub(
; CHECK-NEXT: [[V2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 30)
; CHECK-NEXT: ret i8 [[V2]]
;
%v1 = call i8 @llvm.sadd.sat.i8(i8 10, i8 %a)
%v2 = call i8 @llvm.ssub.sat.i8(i8 %v1, i8 -20)
ret i8 %v2
}
define <2 x i8> @test_vector_sadd_ssub(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_sadd_ssub(
; CHECK-NEXT: [[V2:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A:%.*]], <2 x i8> <i8 -30, i8 -30>)
; CHECK-NEXT: ret <2 x i8> [[V2]]
;
%v1 = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> <i8 -10, i8 -10>, <2 x i8> %a)
%v2 = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %v1, <2 x i8> <i8 20, i8 20>)
ret <2 x i8> %v2
}
; Can't combine ssubs if they overflow.
define i8 @test_scalar_ssub_overflow(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_overflow(
; CHECK-NEXT: [[W1:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A:%.*]], i8 -100)
; CHECK-NEXT: [[W2:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[W1]], i8 -100)
; CHECK-NEXT: ret i8 [[W2]]
;
%w1 = call i8 @llvm.ssub.sat.i8(i8 %a, i8 100)
%w2 = call i8 @llvm.ssub.sat.i8(i8 %w1, i8 100)
ret i8 %w2
}
; nneg usub neg always overflows.
define i8 @test_scalar_usub_nneg_neg(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_nneg_neg(
; CHECK-NEXT: ret i8 0
;
%a_nneg = and i8 %a, 127
%r = call i8 @llvm.usub.sat.i8(i8 %a_nneg, i8 -10)
ret i8 %r
}
define <2 x i8> @test_vector_usub_nneg_neg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_nneg_neg(
; CHECK-NEXT: ret <2 x i8> zeroinitializer
;
%a_nneg = and <2 x i8> %a, <i8 127, i8 127>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a_nneg, <2 x i8> <i8 -10, i8 -20>)
ret <2 x i8> %r
}
; neg usub nneg never overflows.
define i8 @test_scalar_usub_neg_nneg(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or i8 [[A:%.*]], -128
; CHECK-NEXT: [[R:%.*]] = add i8 [[A_NEG]], -10
; CHECK-NEXT: ret i8 [[R]]
;
%a_neg = or i8 %a, -128
%r = call i8 @llvm.usub.sat.i8(i8 %a_neg, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_usub_neg_nneg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or <2 x i8> [[A:%.*]], <i8 -128, i8 -128>
; CHECK-NEXT: [[R:%.*]] = add <2 x i8> [[A_NEG]], <i8 -10, i8 -20>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_neg = or <2 x i8> %a, <i8 -128, i8 -128>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a_neg, <2 x i8> <i8 10, i8 20>)
ret <2 x i8> %r
}
; nneg usub nneg never may overflow.
define i8 @test_scalar_usub_nneg_nneg(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_nneg_nneg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and i8 [[A:%.*]], 127
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A_NNEG]], i8 10)
; CHECK-NEXT: ret i8 [[R]]
;
%a_nneg = and i8 %a, 127
%r = call i8 @llvm.usub.sat.i8(i8 %a_nneg, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_usub_nneg_nneg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_nneg_nneg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and <2 x i8> [[A:%.*]], <i8 127, i8 127>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[A_NNEG]], <2 x i8> <i8 10, i8 20>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_nneg = and <2 x i8> %a, <i8 127, i8 127>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a_nneg, <2 x i8> <i8 10, i8 20>)
ret <2 x i8> %r
}
define i8 @test_scalar_usub_never_overflows(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_never_overflows(
; CHECK-NEXT: [[A_MASKED:%.*]] = or i8 [[A:%.*]], 64
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[A_MASKED]], -10
; CHECK-NEXT: ret i8 [[R]]
;
%a_masked = or i8 %a, 64
%r = call i8 @llvm.usub.sat.i8(i8 %a_masked, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_usub_never_overflows(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_never_overflows(
; CHECK-NEXT: [[A_MASKED:%.*]] = or <2 x i8> [[A:%.*]], <i8 64, i8 64>
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i8> [[A_MASKED]], <i8 -10, i8 -10>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_masked = or <2 x i8> %a, <i8 64, i8 64>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a_masked, <2 x i8> <i8 10, i8 10>)
ret <2 x i8> %r
}
define i8 @test_scalar_usub_always_overflows(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_always_overflows(
; CHECK-NEXT: ret i8 0
;
%a_masked = and i8 %a, 64
%r = call i8 @llvm.usub.sat.i8(i8 %a_masked, i8 100)
ret i8 %r
}
define <2 x i8> @test_vector_usub_always_overflows(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_always_overflows(
; CHECK-NEXT: ret <2 x i8> zeroinitializer
;
%a_masked = and <2 x i8> %a, <i8 64, i8 64>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a_masked, <2 x i8> <i8 100, i8 100>)
ret <2 x i8> %r
}
; neg ssub neg never overflows.
define i8 @test_scalar_ssub_neg_neg(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_neg_neg(
; CHECK-NEXT: [[A_NEG:%.*]] = or i8 [[A:%.*]], -128
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[A_NEG]], 10
; CHECK-NEXT: ret i8 [[R]]
;
%a_neg = or i8 %a, -128
%r = call i8 @llvm.ssub.sat.i8(i8 %a_neg, i8 -10)
ret i8 %r
}
define <2 x i8> @test_vector_ssub_neg_neg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_neg_neg(
; CHECK-NEXT: [[A_NEG:%.*]] = or <2 x i8> [[A:%.*]], <i8 -128, i8 -128>
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i8> [[A_NEG]], <i8 10, i8 20>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_neg = or <2 x i8> %a, <i8 -128, i8 -128>
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a_neg, <2 x i8> <i8 -10, i8 -20>)
ret <2 x i8> %r
}
; nneg ssub nneg never overflows.
define i8 @test_scalar_ssub_nneg_nneg(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_nneg_nneg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and i8 [[A:%.*]], 127
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[A_NNEG]], -10
; CHECK-NEXT: ret i8 [[R]]
;
%a_nneg = and i8 %a, 127
%r = call i8 @llvm.ssub.sat.i8(i8 %a_nneg, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_ssub_nneg_nneg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_nneg_nneg(
; CHECK-NEXT: [[A_NNEG:%.*]] = and <2 x i8> [[A:%.*]], <i8 127, i8 127>
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i8> [[A_NNEG]], <i8 -10, i8 -20>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_nneg = and <2 x i8> %a, <i8 127, i8 127>
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a_nneg, <2 x i8> <i8 10, i8 20>)
ret <2 x i8> %r
}
; neg ssub nneg may overflow.
define i8 @test_scalar_ssub_neg_nneg(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or i8 [[A:%.*]], -128
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[A_NEG]], i8 -10)
; CHECK-NEXT: ret i8 [[R]]
;
%a_neg = or i8 %a, -128
%r = call i8 @llvm.ssub.sat.i8(i8 %a_neg, i8 10)
ret i8 %r
}
define <2 x i8> @test_vector_ssub_neg_nneg(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_ssub_neg_nneg(
; CHECK-NEXT: [[A_NEG:%.*]] = or <2 x i8> [[A:%.*]], <i8 -128, i8 -128>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.sadd.sat.v2i8(<2 x i8> [[A_NEG]], <2 x i8> <i8 -10, i8 -20>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%a_neg = or <2 x i8> %a, <i8 -128, i8 -128>
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %a_neg, <2 x i8> <i8 10, i8 20>)
ret <2 x i8> %r
}
define i8 @test_scalar_ssub_always_overflows_low(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_always_overflows_low(
; CHECK-NEXT: ret i8 -128
;
%cmp = icmp sgt i8 %a, 120
%max = select i1 %cmp, i8 %a, i8 120
%r = call i8 @llvm.ssub.sat.i8(i8 -10, i8 %max)
ret i8 %r
}
define i8 @test_scalar_ssub_always_overflows_high(i8 %a) {
; CHECK-LABEL: @test_scalar_ssub_always_overflows_high(
; CHECK-NEXT: ret i8 127
;
%cmp = icmp slt i8 %a, -120
%min = select i1 %cmp, i8 %a, i8 -120
%r = call i8 @llvm.ssub.sat.i8(i8 10, i8 %min)
ret i8 %r
}
define i8 @test_scalar_usub_add_nuw_no_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_add_nuw_no_ov(
; CHECK-NEXT: [[R:%.*]] = add i8 [[A:%.*]], 1
; CHECK-NEXT: ret i8 [[R]]
;
%b = add nuw i8 %a, 10
%r = call i8 @llvm.usub.sat.i8(i8 %b, i8 9)
ret i8 %r
}
define i8 @test_scalar_usub_add_nuw_nsw_no_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_add_nuw_nsw_no_ov(
; CHECK-NEXT: [[R:%.*]] = add i8 [[A:%.*]], 1
; CHECK-NEXT: ret i8 [[R]]
;
%b = add nuw nsw i8 %a, 10
%r = call i8 @llvm.usub.sat.i8(i8 %b, i8 9)
ret i8 %r
}
define i8 @test_scalar_usub_add_nuw_eq(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_add_nuw_eq(
; CHECK-NEXT: ret i8 [[A:%.*]]
;
%b = add nuw i8 %a, 10
%r = call i8 @llvm.usub.sat.i8(i8 %b, i8 10)
ret i8 %r
}
define i8 @test_scalar_usub_add_nuw_may_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_add_nuw_may_ov(
; CHECK-NEXT: [[B:%.*]] = add nuw i8 [[A:%.*]], 10
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[B]], i8 11)
; CHECK-NEXT: ret i8 [[R]]
;
%b = add nuw i8 %a, 10
%r = call i8 @llvm.usub.sat.i8(i8 %b, i8 11)
ret i8 %r
}
define i8 @test_scalar_usub_urem_must_ov(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_urem_must_ov(
; CHECK-NEXT: ret i8 0
;
%b = urem i8 %a, 10
%r = call i8 @llvm.usub.sat.i8(i8 %b, i8 10)
ret i8 %r
}
; Like the previous case, the result is always zero here. However, as there's
; no actual overflow, we won't know about it.
define i8 @test_scalar_usub_urem_must_zero(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_urem_must_zero(
; CHECK-NEXT: [[B:%.*]] = urem i8 [[A:%.*]], 10
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[B]], i8 9)
; CHECK-NEXT: ret i8 [[R]]
;
%b = urem i8 %a, 10
%r = call i8 @llvm.usub.sat.i8(i8 %b, i8 9)
ret i8 %r
}
; We have a constant range for the LHS, but only known bits for the RHS
define i8 @test_scalar_usub_add_nuw_known_bits(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_usub_add_nuw_known_bits(
; CHECK-NEXT: [[AA:%.*]] = add nuw i8 [[A:%.*]], 10
; CHECK-NEXT: [[BB:%.*]] = and i8 [[B:%.*]], 7
; CHECK-NEXT: [[R:%.*]] = sub nuw i8 [[AA]], [[BB]]
; CHECK-NEXT: ret i8 [[R]]
;
%aa = add nuw i8 %a, 10
%bb = and i8 %b, 7
%r = call i8 @llvm.usub.sat.i8(i8 %aa, i8 %bb)
ret i8 %r
}
define i8 @test_scalar_usub_add_nuw_inferred(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_add_nuw_inferred(
; CHECK-NEXT: [[B:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 10)
; CHECK-NEXT: [[R:%.*]] = add nuw i8 [[B]], 9
; CHECK-NEXT: ret i8 [[R]]
;
%b = call i8 @llvm.usub.sat.i8(i8 %a, i8 10)
%r = add i8 %b, 9
ret i8 %r
}
define <2 x i8> @test_vector_usub_add_nuw_no_ov(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_add_nuw_no_ov(
; CHECK-NEXT: [[R:%.*]] = add <2 x i8> [[A:%.*]], <i8 1, i8 1>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%b = add nuw <2 x i8> %a, <i8 10, i8 10>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %b, <2 x i8> <i8 9, i8 9>)
ret <2 x i8> %r
}
define <2 x i8> @test_vector_usub_add_nuw_no_ov_nonsplat1(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_add_nuw_no_ov_nonsplat1(
; CHECK-NEXT: [[R:%.*]] = add <2 x i8> [[A:%.*]], <i8 0, i8 1>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%b = add nuw <2 x i8> %a, <i8 10, i8 10>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %b, <2 x i8> <i8 10, i8 9>)
ret <2 x i8> %r
}
define <3 x i8> @test_vector_usub_add_nuw_no_ov_nonsplat1_poison(<3 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_add_nuw_no_ov_nonsplat1_poison(
; CHECK-NEXT: [[R:%.*]] = add <3 x i8> [[A:%.*]], <i8 0, i8 1, i8 poison>
; CHECK-NEXT: ret <3 x i8> [[R]]
;
%b = add nuw <3 x i8> %a, <i8 10, i8 10, i8 10>
%r = call <3 x i8> @llvm.usub.sat.v3i8(<3 x i8> %b, <3 x i8> <i8 10, i8 9, i8 poison>)
ret <3 x i8> %r
}
; Can be optimized if the add nuw RHS constant range handles non-splat vectors.
define <2 x i8> @test_vector_usub_add_nuw_no_ov_nonsplat2(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_add_nuw_no_ov_nonsplat2(
; CHECK-NEXT: [[B:%.*]] = add nuw <2 x i8> [[A:%.*]], <i8 10, i8 9>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[B]], <2 x i8> <i8 9, i8 9>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%b = add nuw <2 x i8> %a, <i8 10, i8 9>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %b, <2 x i8> <i8 9, i8 9>)
ret <2 x i8> %r
}
; Can be optimized if constant range is tracked per-element.
define <2 x i8> @test_vector_usub_add_nuw_no_ov_nonsplat3(<2 x i8> %a) {
; CHECK-LABEL: @test_vector_usub_add_nuw_no_ov_nonsplat3(
; CHECK-NEXT: [[B:%.*]] = add nuw <2 x i8> [[A:%.*]], <i8 10, i8 9>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[B]], <2 x i8> <i8 10, i8 9>)
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%b = add nuw <2 x i8> %a, <i8 10, i8 9>
%r = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %b, <2 x i8> <i8 10, i8 9>)
ret <2 x i8> %r
}
define i8 @test_scalar_ssub_add_nsw_no_ov(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_ssub_add_nsw_no_ov(
; CHECK-NEXT: [[AA:%.*]] = add nsw i8 [[A:%.*]], 7
; CHECK-NEXT: [[BB:%.*]] = and i8 [[B:%.*]], 7
; CHECK-NEXT: [[R:%.*]] = sub nsw i8 [[AA]], [[BB]]
; CHECK-NEXT: ret i8 [[R]]
;
%aa = add nsw i8 %a, 7
%bb = and i8 %b, 7
%r = call i8 @llvm.ssub.sat.i8(i8 %aa, i8 %bb)
ret i8 %r
}
define i8 @test_scalar_ssub_add_nsw_may_ov(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_ssub_add_nsw_may_ov(
; CHECK-NEXT: [[AA:%.*]] = add nsw i8 [[A:%.*]], 6
; CHECK-NEXT: [[BB:%.*]] = and i8 [[B:%.*]], 7
; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.ssub.sat.i8(i8 [[AA]], i8 [[BB]])
; CHECK-NEXT: ret i8 [[R]]
;
%aa = add nsw i8 %a, 6
%bb = and i8 %b, 7
%r = call i8 @llvm.ssub.sat.i8(i8 %aa, i8 %bb)
ret i8 %r
}
define <2 x i8> @test_vector_ssub_add_nsw_no_ov_splat(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @test_vector_ssub_add_nsw_no_ov_splat(
; CHECK-NEXT: [[AA:%.*]] = add nsw <2 x i8> [[A:%.*]], <i8 7, i8 7>
; CHECK-NEXT: [[BB:%.*]] = and <2 x i8> [[B:%.*]], <i8 7, i8 7>
; CHECK-NEXT: [[R:%.*]] = sub nsw <2 x i8> [[AA]], [[BB]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%aa = add nsw <2 x i8> %a, <i8 7, i8 7>
%bb = and <2 x i8> %b, <i8 7, i8 7>
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %aa, <2 x i8> %bb)
ret <2 x i8> %r
}
define <2 x i8> @test_vector_ssub_add_nsw_no_ov_nonsplat1(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @test_vector_ssub_add_nsw_no_ov_nonsplat1(
; CHECK-NEXT: [[AA:%.*]] = add nsw <2 x i8> [[A:%.*]], <i8 7, i8 7>
; CHECK-NEXT: [[BB:%.*]] = and <2 x i8> [[B:%.*]], <i8 7, i8 6>
; CHECK-NEXT: [[R:%.*]] = sub nsw <2 x i8> [[AA]], [[BB]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%aa = add nsw <2 x i8> %a, <i8 7, i8 7>
%bb = and <2 x i8> %b, <i8 7, i8 6>
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %aa, <2 x i8> %bb)
ret <2 x i8> %r
}
define <2 x i8> @test_vector_ssub_add_nsw_no_ov_nonsplat2(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @test_vector_ssub_add_nsw_no_ov_nonsplat2(
; CHECK-NEXT: [[AA:%.*]] = add nsw <2 x i8> [[A:%.*]], <i8 7, i8 8>
; CHECK-NEXT: [[BB:%.*]] = and <2 x i8> [[B:%.*]], <i8 7, i8 7>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> [[AA]], <2 x i8> [[BB]])
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%aa = add nsw <2 x i8> %a, <i8 7, i8 8>
%bb = and <2 x i8> %b, <i8 7, i8 7>
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %aa, <2 x i8> %bb)
ret <2 x i8> %r
}
define <2 x i8> @test_vector_ssub_add_nsw_no_ov_nonsplat3(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @test_vector_ssub_add_nsw_no_ov_nonsplat3(
; CHECK-NEXT: [[AA:%.*]] = add nsw <2 x i8> [[A:%.*]], <i8 7, i8 6>
; CHECK-NEXT: [[BB:%.*]] = and <2 x i8> [[B:%.*]], <i8 7, i8 6>
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> [[AA]], <2 x i8> [[BB]])
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%aa = add nsw <2 x i8> %a, <i8 7, i8 6>
%bb = and <2 x i8> %b, <i8 7, i8 6>
%r = call <2 x i8> @llvm.ssub.sat.v2i8(<2 x i8> %aa, <2 x i8> %bb)
ret <2 x i8> %r
}
define i8 @test_scalar_usub_add(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_usub_add(
; CHECK-NEXT: [[RES:%.*]] = call i8 @llvm.umax.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
%res = add i8 %sat, %b
ret i8 %res
}
define i8 @test_scalar_usub_add_extra_use(i8 %a, i8 %b, ptr %p) {
; CHECK-LABEL: @test_scalar_usub_add_extra_use(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: store i8 [[SAT]], ptr [[P:%.*]], align 1
; CHECK-NEXT: [[RES:%.*]] = add i8 [[SAT]], [[B]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
store i8 %sat, ptr %p
%res = add i8 %sat, %b
ret i8 %res
}
define i8 @test_scalar_usub_add_commuted(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_usub_add_commuted(
; CHECK-NEXT: [[RES:%.*]] = call i8 @llvm.umax.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
%res = add i8 %b, %sat
ret i8 %res
}
define i8 @test_scalar_usub_add_commuted_wrong(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_usub_add_commuted_wrong(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[B:%.*]], i8 [[A:%.*]])
; CHECK-NEXT: [[RES:%.*]] = add i8 [[SAT]], [[B]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %b, i8 %a)
%res = add i8 %sat, %b
ret i8 %res
}
define i8 @test_scalar_usub_add_const(i8 %a) {
; CHECK-LABEL: @test_scalar_usub_add_const(
; CHECK-NEXT: [[RES:%.*]] = call i8 @llvm.umax.i8(i8 [[A:%.*]], i8 42)
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 42)
%res = add i8 %sat, 42
ret i8 %res
}
define i8 @test_scalar_usub_sub(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_usub_sub(
; CHECK-NEXT: [[RES:%.*]] = call i8 @llvm.umin.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
%res = sub i8 %a, %sat
ret i8 %res
}
define i8 @test_scalar_usub_sub_extra_use(i8 %a, i8 %b, ptr %p) {
; CHECK-LABEL: @test_scalar_usub_sub_extra_use(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: store i8 [[SAT]], ptr [[P:%.*]], align 1
; CHECK-NEXT: [[RES:%.*]] = sub i8 [[A]], [[SAT]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
store i8 %sat, ptr %p
%res = sub i8 %a, %sat
ret i8 %res
}
define <2 x i8> @test_vector_usub_sub(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @test_vector_usub_sub(
; CHECK-NEXT: [[RES:%.*]] = call <2 x i8> @llvm.umin.v2i8(<2 x i8> [[A:%.*]], <2 x i8> [[B:%.*]])
; CHECK-NEXT: ret <2 x i8> [[RES]]
;
%sat = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> %a, <2 x i8> %b)
%res = sub <2 x i8> %a, %sat
ret <2 x i8> %res
}
define i8 @test_scalar_usub_sub_wrong(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_usub_sub_wrong(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: [[RES:%.*]] = sub i8 [[B]], [[SAT]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
%res = sub i8 %b, %sat
ret i8 %res
}
define i8 @test_scalar_usub_sub_wrong2(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_usub_sub_wrong2(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: [[RES:%.*]] = sub i8 [[SAT]], [[B]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
%res = sub i8 %sat, %b
ret i8 %res
}
define i8 @test_scalar_uadd_sub(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_uadd_sub(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: [[RES:%.*]] = sub i8 [[SAT]], [[B]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.uadd.sat.i8(i8 %a, i8 %b)
%res = sub i8 %sat, %b
ret i8 %res
}
define i8 @test_scalar_uadd_sub_extra_use(i8 %a, i8 %b, ptr %p) {
; CHECK-LABEL: @test_scalar_uadd_sub_extra_use(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: store i8 [[SAT]], ptr [[P:%.*]], align 1
; CHECK-NEXT: [[RES:%.*]] = sub i8 [[SAT]], [[B]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.uadd.sat.i8(i8 %a, i8 %b)
store i8 %sat, ptr %p
%res = sub i8 %sat, %b
ret i8 %res
}
define i8 @test_scalar_uadd_sub_commuted(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_uadd_sub_commuted(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[B:%.*]], i8 [[A:%.*]])
; CHECK-NEXT: [[RES:%.*]] = sub i8 [[SAT]], [[B]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.uadd.sat.i8(i8 %b, i8 %a)
%res = sub i8 %sat, %b
ret i8 %res
}
define i8 @test_scalar_uadd_sub_commuted_wrong(i8 %a, i8 %b) {
; CHECK-LABEL: @test_scalar_uadd_sub_commuted_wrong(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[A:%.*]], i8 [[B:%.*]])
; CHECK-NEXT: [[RES:%.*]] = sub i8 [[B]], [[SAT]]
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.uadd.sat.i8(i8 %a, i8 %b)
%res = sub i8 %b, %sat
ret i8 %res
}
define i8 @test_scalar_uadd_sub_const(i8 %a) {
; CHECK-LABEL: @test_scalar_uadd_sub_const(
; CHECK-NEXT: [[SAT:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[A:%.*]], i8 42)
; CHECK-NEXT: [[RES:%.*]] = add i8 [[SAT]], -42
; CHECK-NEXT: ret i8 [[RES]]
;
%sat = call i8 @llvm.uadd.sat.i8(i8 %a, i8 42)
%res = sub i8 %sat, 42
ret i8 %res
}
define i1 @scalar_uadd_eq_zero(i8 %a, i8 %b) {
; CHECK-LABEL: @scalar_uadd_eq_zero(
; CHECK-NEXT: [[TMP1:%.*]] = or i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%sat = call i8 @llvm.uadd.sat.i8(i8 %a, i8 %b)
%cmp = icmp eq i8 %sat, 0
ret i1 %cmp
}
define i1 @scalar_uadd_ne_zero(i8 %a, i8 %b) {
; CHECK-LABEL: @scalar_uadd_ne_zero(
; CHECK-NEXT: [[TMP1:%.*]] = or i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%sat = call i8 @llvm.uadd.sat.i8(i8 %a, i8 %b)
%cmp = icmp ne i8 %sat, 0
ret i1 %cmp
}
define i1 @scalar_usub_eq_zero(i8 %a, i8 %b) {
; CHECK-LABEL: @scalar_usub_eq_zero(
; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
%cmp = icmp eq i8 %sat, 0
ret i1 %cmp
}
define i1 @scalar_usub_ne_zero(i8 %a, i8 %b) {
; CHECK-LABEL: @scalar_usub_ne_zero(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%sat = call i8 @llvm.usub.sat.i8(i8 %a, i8 %b)
%cmp = icmp ne i8 %sat, 0
ret i1 %cmp
}
; Raw IR tests
define i32 @uadd_sat(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %y, %x
%c = icmp ult i32 %notx, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_flipped(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped(
; CHECK-NEXT: [[COND:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 9)
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ugt i32 %x, -11
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
define i32 @uadd_sat_flipped2(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped2(
; CHECK-NEXT: [[COND:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 9)
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ugt i32 %x, -10
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
define i32 @uadd_sat_flipped3(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped3(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -8
; CHECK-NEXT: [[ADD:%.*]] = add nuw i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 -1, i32 [[ADD]]
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ugt i32 %x, -8
%add = add nuw i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
; Negative Test
define i32 @uadd_sat_flipped3_neg_no_nuw(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped3_neg_no_nuw(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -8
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 -1, i32 [[ADD]]
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ugt i32 %x, -8
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
define i32 @uadd_sat_negative_one(i32 %x) {
; CHECK-LABEL: @uadd_sat_negative_one(
; CHECK-NEXT: [[COND:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 1)
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp eq i32 %x, -1
%add = add i32 %x, 1
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
define <2 x i8> @uadd_sat_flipped4_vector(<2 x i8> %x) {
; CHECK-LABEL: @uadd_sat_flipped4_vector(
; CHECK-NEXT: [[COND:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 9, i8 9>)
; CHECK-NEXT: ret <2 x i8> [[COND]]
;
%cmp = icmp ult <2 x i8> %x, <i8 -10, i8 -10>
%add = add <2 x i8> %x, <i8 9, i8 9>
%cond = select <2 x i1> %cmp, <2 x i8> %add, <2 x i8> <i8 -1, i8 -1>
ret <2 x i8> %cond
}
define <2 x i8> @uadd_sat_flipped4_poison_vector(<2 x i8> %x) {
; CHECK-LABEL: @uadd_sat_flipped4_poison_vector(
; CHECK-NEXT: [[COND:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 9, i8 9>)
; CHECK-NEXT: ret <2 x i8> [[COND]]
;
%cmp = icmp ult <2 x i8> %x, <i8 -10, i8 poison>
%add = add <2 x i8> %x, <i8 9, i8 9>
%cond = select <2 x i1> %cmp, <2 x i8> %add,<2 x i8> <i8 -1, i8 -1>
ret <2 x i8> %cond
}
define <2 x i8> @uadd_sat_flipped4_poison_vector_compare(<2 x i8> %x) {
; CHECK-LABEL: @uadd_sat_flipped4_poison_vector_compare(
; CHECK-NEXT: [[COND:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 9, i8 9>)
; CHECK-NEXT: ret <2 x i8> [[COND]]
;
%cmp = icmp ult <2 x i8> %x, <i8 -10, i8 poison>
%add = add <2 x i8> %x, <i8 9, i8 poison>
%cond = select <2 x i1> %cmp, <2 x i8> %add,<2 x i8> <i8 -1, i8 -1>
ret <2 x i8> %cond
}
define <2 x i8> @uadd_sat_flipped4_poison_vector_compare2(<2 x i8> %x) {
; CHECK-LABEL: @uadd_sat_flipped4_poison_vector_compare2(
; CHECK-NEXT: ret <2 x i8> <i8 -1, i8 -1>
;
%cmp = icmp ult <2 x i8> %x, <i8 -10, i8 poison>
%add = add <2 x i8> %x, <i8 poison, i8 poison>
%cond = select <2 x i1> %cmp, <2 x i8> %add,<2 x i8> <i8 -1, i8 -1>
ret <2 x i8> %cond
}
; Negative test:
define i32 @uadd_sat_flipped_too_big(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_too_big(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], -8
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[ADD]], i32 -1
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 %x, -8
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 %add, i32 -1
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -13
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 -1, i32 [[ADD]]
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp uge i32 %x, -12
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds2(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -12
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 -1, i32 [[ADD]]
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ugt i32 %x, -12
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds3(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds3(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -12
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 -1, i32 [[ADD]]
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ugt i32 %x, -12
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds4(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds4(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -9
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 -1, i32 [[ADD]]
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp uge i32 %x, -8
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 -1, i32 %add
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds5(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds5(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], -8
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[ADD]], i32 -1
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 %x, -8
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 %add, i32 -1
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds6(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds6(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], -11
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[ADD]], i32 -1
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ule i32 %x, -12
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 %add, i32 -1
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds7(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds7(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], -11
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[ADD]], i32 -1
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ule i32 %x, -12
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 %add, i32 -1
ret i32 %cond
}
; Negative test:
define i32 @uadd_sat_flipped_wrong_bounds8(i32 %x) {
; CHECK-LABEL: @uadd_sat_flipped_wrong_bounds8(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], -12
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 9
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[ADD]], i32 -1
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 %x, -12
%add = add i32 %x, 9
%cond = select i1 %cmp, i32 %add, i32 -1
ret i32 %cond
}
define i32 @uadd_sat_nonstrict(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_nonstrict(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %y, %x
%c = icmp ule i32 %notx, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_commute_add(i32 %xp, i32 %y) {
; CHECK-LABEL: @uadd_sat_commute_add(
; CHECK-NEXT: [[X:%.*]] = urem i32 42, [[XP:%.*]]
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X]], i32 [[Y:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%x = urem i32 42, %xp ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %x, %y
%c = icmp ult i32 %notx, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_ugt(i32 %x, i32 %yp) {
; CHECK-LABEL: @uadd_sat_ugt(
; CHECK-NEXT: [[Y:%.*]] = sdiv i32 [[YP:%.*]], 2442
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y]])
; CHECK-NEXT: ret i32 [[R]]
;
%y = sdiv i32 %yp, 2442 ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %y, %x
%c = icmp ugt i32 %y, %notx
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_uge(i32 %x, i32 %yp) {
; CHECK-LABEL: @uadd_sat_uge(
; CHECK-NEXT: [[Y:%.*]] = sdiv i32 [[YP:%.*]], 2442
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y]])
; CHECK-NEXT: ret i32 [[R]]
;
%y = sdiv i32 %yp, 2442 ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %y, %x
%c = icmp uge i32 %y, %notx
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define <2 x i32> @uadd_sat_ugt_commute_add(<2 x i32> %xp, <2 x i32> %yp) {
; CHECK-LABEL: @uadd_sat_ugt_commute_add(
; CHECK-NEXT: [[Y:%.*]] = sdiv <2 x i32> [[YP:%.*]], <i32 2442, i32 4242>
; CHECK-NEXT: [[X:%.*]] = srem <2 x i32> <i32 42, i32 43>, [[XP:%.*]]
; CHECK-NEXT: [[R:%.*]] = call <2 x i32> @llvm.uadd.sat.v2i32(<2 x i32> [[X]], <2 x i32> [[Y]])
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%y = sdiv <2 x i32> %yp, <i32 2442, i32 4242> ; thwart complexity-based-canonicalization
%x = srem <2 x i32> <i32 42, i32 43>, %xp ; thwart complexity-based-canonicalization
%notx = xor <2 x i32> %x, <i32 -1, i32 -1>
%a = add <2 x i32> %x, %y
%c = icmp ugt <2 x i32> %y, %notx
%r = select <2 x i1> %c, <2 x i32> <i32 -1, i32 -1>, <2 x i32> %a
ret <2 x i32> %r
}
define i32 @uadd_sat_commute_select(i32 %x, i32 %yp) {
; CHECK-LABEL: @uadd_sat_commute_select(
; CHECK-NEXT: [[Y:%.*]] = sdiv i32 [[YP:%.*]], 2442
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y]])
; CHECK-NEXT: ret i32 [[R]]
;
%y = sdiv i32 %yp, 2442 ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %y, %x
%c = icmp ult i32 %y, %notx
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_commute_select_nonstrict(i32 %x, i32 %yp) {
; CHECK-LABEL: @uadd_sat_commute_select_nonstrict(
; CHECK-NEXT: [[Y:%.*]] = sdiv i32 [[YP:%.*]], 2442
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y]])
; CHECK-NEXT: ret i32 [[R]]
;
%y = sdiv i32 %yp, 2442 ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %y, %x
%c = icmp ule i32 %y, %notx
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_commute_select_commute_add(i32 %xp, i32 %yp) {
; CHECK-LABEL: @uadd_sat_commute_select_commute_add(
; CHECK-NEXT: [[X:%.*]] = urem i32 42, [[XP:%.*]]
; CHECK-NEXT: [[Y:%.*]] = sdiv i32 [[YP:%.*]], 2442
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X]], i32 [[Y]])
; CHECK-NEXT: ret i32 [[R]]
;
%x = urem i32 42, %xp ; thwart complexity-based-canonicalization
%y = sdiv i32 %yp, 2442 ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %x, %y
%c = icmp ult i32 %y, %notx
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define <2 x i32> @uadd_sat_commute_select_ugt(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @uadd_sat_commute_select_ugt(
; CHECK-NEXT: [[R:%.*]] = call <2 x i32> @llvm.uadd.sat.v2i32(<2 x i32> [[X:%.*]], <2 x i32> [[Y:%.*]])
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%notx = xor <2 x i32> %x, <i32 -1, i32 -1>
%a = add <2 x i32> %y, %x
%c = icmp ugt <2 x i32> %notx, %y
%r = select <2 x i1> %c, <2 x i32> %a, <2 x i32> <i32 -1, i32 -1>
ret <2 x i32> %r
}
define i32 @uadd_sat_commute_select_ugt_commute_add(i32 %xp, i32 %y) {
; CHECK-LABEL: @uadd_sat_commute_select_ugt_commute_add(
; CHECK-NEXT: [[X:%.*]] = srem i32 42, [[XP:%.*]]
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X]], i32 [[Y:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%x = srem i32 42, %xp ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %x, %y
%c = icmp ugt i32 %notx, %y
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
; Negative test - make sure we have a -1 in the select.
define i32 @not_uadd_sat(i32 %x, i32 %y) {
; CHECK-LABEL: @not_uadd_sat(
; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], -2
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[X]], 1
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 [[Y:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, -2
%c = icmp ugt i32 %x, 1
%r = select i1 %c, i32 %a, i32 %y
ret i32 %r
}
; Negative test - make sure the predicate is 'ult'.
define i32 @not_uadd_sat2(i32 %x, i32 %y) {
; CHECK-LABEL: @not_uadd_sat2(
; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], -2
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[X]], 1
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 -1
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, -2
%c = icmp ugt i32 %x, 1
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
; The add may include a 'not' op rather than the cmp.
define i32 @uadd_sat_not(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp ult i32 %x, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_not_nonstrict(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not_nonstrict(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp ule i32 %x, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_not_commute_add(i32 %xp, i32 %yp) {
; CHECK-LABEL: @uadd_sat_not_commute_add(
; CHECK-NEXT: [[X:%.*]] = srem i32 42, [[XP:%.*]]
; CHECK-NEXT: [[Y:%.*]] = urem i32 42, [[YP:%.*]]
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%x = srem i32 42, %xp ; thwart complexity-based-canonicalization
%y = urem i32 42, %yp ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %y, %notx
%c = icmp ult i32 %x, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_not_ugt(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not_ugt(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp ugt i32 %y, %x
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_not_uge(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not_uge(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp uge i32 %y, %x
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define <2 x i32> @uadd_sat_not_ugt_commute_add(<2 x i32> %x, <2 x i32> %yp) {
; CHECK-LABEL: @uadd_sat_not_ugt_commute_add(
; CHECK-NEXT: [[Y:%.*]] = sdiv <2 x i32> [[YP:%.*]], <i32 2442, i32 4242>
; CHECK-NEXT: [[NOTX:%.*]] = xor <2 x i32> [[X:%.*]], <i32 -1, i32 -1>
; CHECK-NEXT: [[R:%.*]] = call <2 x i32> @llvm.uadd.sat.v2i32(<2 x i32> [[Y]], <2 x i32> [[NOTX]])
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%y = sdiv <2 x i32> %yp, <i32 2442, i32 4242> ; thwart complexity-based-canonicalization
%notx = xor <2 x i32> %x, <i32 -1, i32 -1>
%a = add <2 x i32> %y, %notx
%c = icmp ugt <2 x i32> %y, %x
%r = select <2 x i1> %c, <2 x i32> <i32 -1, i32 -1>, <2 x i32> %a
ret <2 x i32> %r
}
define i32 @uadd_sat_not_commute_select(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not_commute_select(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp ult i32 %y, %x
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_not_commute_select_nonstrict(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not_commute_select_nonstrict(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp ule i32 %y, %x
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_not_commute_select_commute_add(i32 %x, i32 %yp) {
; CHECK-LABEL: @uadd_sat_not_commute_select_commute_add(
; CHECK-NEXT: [[Y:%.*]] = sdiv i32 42, [[YP:%.*]]
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%y = sdiv i32 42, %yp ; thwart complexity-based-canonicalization
%notx = xor i32 %x, -1
%a = add i32 %y, %notx
%c = icmp ult i32 %y, %x
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define <2 x i32> @uadd_sat_not_commute_select_ugt(<2 x i32> %xp, <2 x i32> %yp) {
; CHECK-LABEL: @uadd_sat_not_commute_select_ugt(
; CHECK-NEXT: [[X:%.*]] = urem <2 x i32> <i32 42, i32 -42>, [[XP:%.*]]
; CHECK-NEXT: [[Y:%.*]] = srem <2 x i32> <i32 12, i32 412>, [[YP:%.*]]
; CHECK-NEXT: [[NOTX:%.*]] = xor <2 x i32> [[X]], <i32 -1, i32 -1>
; CHECK-NEXT: [[R:%.*]] = call <2 x i32> @llvm.uadd.sat.v2i32(<2 x i32> [[Y]], <2 x i32> [[NOTX]])
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%x = urem <2 x i32> <i32 42, i32 -42>, %xp ; thwart complexity-based-canonicalization
%y = srem <2 x i32> <i32 12, i32 412>, %yp ; thwart complexity-based-canonicalization
%notx = xor <2 x i32> %x, <i32 -1, i32 -1>
%a = add <2 x i32> %y, %notx
%c = icmp ugt <2 x i32> %x, %y
%r = select <2 x i1> %c, <2 x i32> %a, <2 x i32> <i32 -1, i32 -1>
ret <2 x i32> %r
}
define i32 @uadd_sat_not_commute_select_ugt_commute_add(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not_commute_select_ugt_commute_add(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp ugt i32 %x, %y
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_not_commute_select_uge_commute_add(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_not_commute_select_uge_commute_add(
; CHECK-NEXT: [[NOTX:%.*]] = xor i32 [[X:%.*]], -1
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[NOTX]])
; CHECK-NEXT: ret i32 [[R]]
;
%notx = xor i32 %x, -1
%a = add i32 %notx, %y
%c = icmp uge i32 %x, %y
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_constant(i32 %x) {
; CHECK-LABEL: @uadd_sat_constant(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, 42
%c = icmp ugt i32 %x, -43
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_constant_commute(i32 %x) {
; CHECK-LABEL: @uadd_sat_constant_commute(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, 42
%c = icmp ult i32 %x, -43
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_canon(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_canon(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ult i32 %a, %x
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_canon_y(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_canon_y(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[X:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ult i32 %a, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_canon_nuw(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_canon_nuw(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i32 [[A]]
;
%a = add nuw i32 %x, %y
%c = icmp ult i32 %a, %x
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_canon_y_nuw(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_canon_y_nuw(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret i32 [[A]]
;
%a = add nuw i32 %x, %y
%c = icmp ult i32 %a, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define <4 x i32> @uadd_sat_constant_vec(<4 x i32> %x) {
; CHECK-LABEL: @uadd_sat_constant_vec(
; CHECK-NEXT: [[R:%.*]] = call <4 x i32> @llvm.uadd.sat.v4i32(<4 x i32> [[X:%.*]], <4 x i32> <i32 42, i32 42, i32 42, i32 42>)
; CHECK-NEXT: ret <4 x i32> [[R]]
;
%a = add <4 x i32> %x, <i32 42, i32 42, i32 42, i32 42>
%c = icmp ugt <4 x i32> %x, <i32 -43, i32 -43, i32 -43, i32 -43>
%r = select <4 x i1> %c, <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>, <4 x i32> %a
ret <4 x i32> %r
}
define <4 x i32> @uadd_sat_constant_vec_commute(<4 x i32> %x) {
; CHECK-LABEL: @uadd_sat_constant_vec_commute(
; CHECK-NEXT: [[R:%.*]] = call <4 x i32> @llvm.uadd.sat.v4i32(<4 x i32> [[X:%.*]], <4 x i32> <i32 42, i32 42, i32 42, i32 42>)
; CHECK-NEXT: ret <4 x i32> [[R]]
;
%a = add <4 x i32> %x, <i32 42, i32 42, i32 42, i32 42>
%c = icmp ult <4 x i32> %x, <i32 -43, i32 -43, i32 -43, i32 -43>
%r = select <4 x i1> %c, <4 x i32> %a, <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>
ret <4 x i32> %r
}
define <4 x i32> @uadd_sat_constant_vec_commute_undefs(<4 x i32> %x) {
; CHECK-LABEL: @uadd_sat_constant_vec_commute_undefs(
; CHECK-NEXT: [[R:%.*]] = call <4 x i32> @llvm.uadd.sat.v4i32(<4 x i32> [[X:%.*]], <4 x i32> <i32 42, i32 42, i32 42, i32 42>)
; CHECK-NEXT: ret <4 x i32> [[R]]
;
%a = add <4 x i32> %x, <i32 42, i32 42, i32 42, i32 poison>
%c = icmp ult <4 x i32> %x, <i32 -43, i32 -43, i32 poison, i32 -43>
%r = select <4 x i1> %c, <4 x i32> %a, <4 x i32> <i32 -1, i32 poison, i32 -1, i32 -1>
ret <4 x i32> %r
}
declare i32 @get_i32()
declare <2 x i8> @get_v2i8()
define i32 @unsigned_sat_variable_using_min_add(i32 %x) {
; CHECK-LABEL: @unsigned_sat_variable_using_min_add(
; CHECK-NEXT: [[Y:%.*]] = call i32 @get_i32()
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y]])
; CHECK-NEXT: ret i32 [[R]]
;
%y = call i32 @get_i32() ; thwart complexity-based canonicalization
%noty = xor i32 %y, -1
%c = icmp ult i32 %x, %noty
%s = select i1 %c, i32 %x, i32 %noty
%r = add i32 %s, %y
ret i32 %r
}
define i32 @unsigned_sat_variable_using_min_commute_add(i32 %x) {
; CHECK-LABEL: @unsigned_sat_variable_using_min_commute_add(
; CHECK-NEXT: [[Y:%.*]] = call i32 @get_i32()
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 [[Y]])
; CHECK-NEXT: ret i32 [[R]]
;
%y = call i32 @get_i32() ; thwart complexity-based canonicalization
%noty = xor i32 %y, -1
%c = icmp ult i32 %x, %noty
%s = select i1 %c, i32 %x, i32 %noty
%r = add i32 %y, %s
ret i32 %r
}
define <2 x i8> @unsigned_sat_variable_using_min_commute_select(<2 x i8> %x) {
; CHECK-LABEL: @unsigned_sat_variable_using_min_commute_select(
; CHECK-NEXT: [[Y:%.*]] = call <2 x i8> @get_v2i8()
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[X:%.*]], <2 x i8> [[Y]])
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%y = call <2 x i8> @get_v2i8() ; thwart complexity-based canonicalization
%noty = xor <2 x i8> %y, <i8 -1, i8 -1>
%c = icmp ult <2 x i8> %noty, %x
%s = select <2 x i1> %c, <2 x i8> %noty, <2 x i8> %x
%r = add <2 x i8> %s, %y
ret <2 x i8> %r
}
define <2 x i8> @unsigned_sat_variable_using_min_commute_add_select(<2 x i8> %x) {
; CHECK-LABEL: @unsigned_sat_variable_using_min_commute_add_select(
; CHECK-NEXT: [[Y:%.*]] = call <2 x i8> @get_v2i8()
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.uadd.sat.v2i8(<2 x i8> [[X:%.*]], <2 x i8> [[Y]])
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%y = call <2 x i8> @get_v2i8() ; thwart complexity-based canonicalization
%noty = xor <2 x i8> %y, <i8 -1, i8 -1>
%c = icmp ult <2 x i8> %noty, %x
%s = select <2 x i1> %c, <2 x i8> %noty, <2 x i8> %x
%r = add <2 x i8> %y, %s
ret <2 x i8> %r
}
; Negative test
define i32 @unsigned_sat_variable_using_wrong_min(i32 %x) {
; CHECK-LABEL: @unsigned_sat_variable_using_wrong_min(
; CHECK-NEXT: [[Y:%.*]] = call i32 @get_i32()
; CHECK-NEXT: [[NOTY:%.*]] = xor i32 [[Y]], -1
; CHECK-NEXT: [[S:%.*]] = call i32 @llvm.smin.i32(i32 [[X:%.*]], i32 [[NOTY]])
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y]], [[S]]
; CHECK-NEXT: ret i32 [[R]]
;
%y = call i32 @get_i32() ; thwart complexity-based canonicalization
%noty = xor i32 %y, -1
%c = icmp slt i32 %x, %noty
%s = select i1 %c, i32 %x, i32 %noty
%r = add i32 %y, %s
ret i32 %r
}
; Negative test
define i32 @unsigned_sat_variable_using_wrong_value(i32 %x, i32 %z) {
; CHECK-LABEL: @unsigned_sat_variable_using_wrong_value(
; CHECK-NEXT: [[Y:%.*]] = call i32 @get_i32()
; CHECK-NEXT: [[NOTY:%.*]] = xor i32 [[Y]], -1
; CHECK-NEXT: [[S:%.*]] = call i32 @llvm.umin.i32(i32 [[X:%.*]], i32 [[NOTY]])
; CHECK-NEXT: [[R:%.*]] = add i32 [[Z:%.*]], [[S]]
; CHECK-NEXT: ret i32 [[R]]
;
%y = call i32 @get_i32() ; thwart complexity-based canonicalization
%noty = xor i32 %y, -1
%c = icmp ult i32 %x, %noty
%s = select i1 %c, i32 %x, i32 %noty
%r = add i32 %z, %s
ret i32 %r
}
; If we have a constant operand, there's no commutativity variation.
define i32 @unsigned_sat_constant_using_min(i32 %x) {
; CHECK-LABEL: @unsigned_sat_constant_using_min(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[X:%.*]], i32 -43)
; CHECK-NEXT: ret i32 [[R]]
;
%c = icmp ult i32 %x, 42
%s = select i1 %c, i32 %x, i32 42
%r = add i32 %s, -43
ret i32 %r
}
define <2 x i32> @unsigned_sat_constant_using_min_splat(<2 x i32> %x) {
; CHECK-LABEL: @unsigned_sat_constant_using_min_splat(
; CHECK-NEXT: [[R:%.*]] = call <2 x i32> @llvm.uadd.sat.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 -15, i32 -15>)
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%c = icmp ult <2 x i32> %x, <i32 14, i32 14>
%s = select <2 x i1> %c, <2 x i32> %x, <2 x i32> <i32 14, i32 14>
%r = add <2 x i32> %s, <i32 -15, i32 -15>
ret <2 x i32> %r
}
; Negative test
define i32 @unsigned_sat_constant_using_min_wrong_constant(i32 %x) {
; CHECK-LABEL: @unsigned_sat_constant_using_min_wrong_constant(
; CHECK-NEXT: [[S:%.*]] = call i32 @llvm.umin.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: [[R:%.*]] = add nsw i32 [[S]], -42
; CHECK-NEXT: ret i32 [[R]]
;
%c = icmp ult i32 %x, 42
%s = select i1 %c, i32 %x, i32 42
%r = add i32 %s, -42
ret i32 %r
}
define i32 @uadd_sat_via_add(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[X:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ult i32 %a, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_via_add_nonstrict(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add_nonstrict(
; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[C_NOT:%.*]] = icmp ugt i32 [[A]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = select i1 [[C_NOT]], i32 [[A]], i32 -1
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ule i32 %a, %y
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_via_add_swapped_select(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add_swapped_select(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[X:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp uge i32 %a, %y
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_via_add_swapped_select_strict(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add_swapped_select_strict(
; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[A]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 -1
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ugt i32 %a, %y
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_via_add_swapped_cmp(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add_swapped_cmp(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[X:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ugt i32 %y, %a
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_via_add_swapped_cmp_nonstrict(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add_swapped_cmp_nonstrict(
; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[C_NOT:%.*]] = icmp ult i32 [[Y]], [[A]]
; CHECK-NEXT: [[R:%.*]] = select i1 [[C_NOT]], i32 [[A]], i32 -1
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp uge i32 %y, %a
%r = select i1 %c, i32 -1, i32 %a
ret i32 %r
}
define i32 @uadd_sat_via_add_swapped_cmp_nonstric(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add_swapped_cmp_nonstric(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.uadd.sat.i32(i32 [[Y:%.*]], i32 [[X:%.*]])
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ule i32 %y, %a
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
define i32 @uadd_sat_via_add_swapped_cmp_select_nonstrict(i32 %x, i32 %y) {
; CHECK-LABEL: @uadd_sat_via_add_swapped_cmp_select_nonstrict(
; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[C:%.*]] = icmp ult i32 [[Y]], [[A]]
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 -1
; CHECK-NEXT: ret i32 [[R]]
;
%a = add i32 %x, %y
%c = icmp ult i32 %y, %a
%r = select i1 %c, i32 %a, i32 -1
ret i32 %r
}
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