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llvm/llvm/test/Transforms/CorrelatedValuePropagation/shl.ll 

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=correlated-propagation -S | FileCheck %s

define i8 @test0(i8 %a, i8 %b) {
; CHECK-LABEL: @test0(
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i8 [[SHL]]
;
  %shl = shl i8 %a, %b
  ret i8 %shl
}

define i8 @test1(i8 %a, i8 %b) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 8
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 [[A:%.*]], [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 8
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 %a, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test2(i8 %a, i8 %b) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 9
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 [[A:%.*]], [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 9
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 %a, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test3(i8 %a, i8 %b) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ugt i8 [[B:%.*]], 6
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 [[A:%.*]], [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ugt i8 %b, 6
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 %a, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test4(i8 %a, i8 %b) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ugt i8 [[B:%.*]], 7
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw nsw i8 [[A:%.*]], [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ugt i8 %b, 7
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 %a, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test5(i8 %b) {
; CHECK-LABEL: @test5(
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw nsw i8 0, [[B:%.*]]
; CHECK-NEXT:    ret i8 0
;
  %shl = shl i8 0, %b
  ret i8 %shl
}

define i8 @test6(i8 %b) {
; CHECK-LABEL: @test6(
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw i8 1, [[B:%.*]]
; CHECK-NEXT:    ret i8 [[SHL]]
;
  %shl = shl i8 1, %b
  ret i8 %shl
}

define i8 @test7(i8 %b) {
; CHECK-LABEL: @test7(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 7
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw nsw i8 1, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 7
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 1, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test8(i8 %b) {
; CHECK-LABEL: @test8(
; CHECK-NEXT:    [[SHL:%.*]] = shl nsw i8 -1, [[B:%.*]]
; CHECK-NEXT:    ret i8 [[SHL]]
;
  %shl = shl i8 -1, %b
  ret i8 %shl
}

define i8 @test9(i8 %b) {
; CHECK-LABEL: @test9(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i8 [[B:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw nsw i8 -1, [[B]]
; CHECK-NEXT:    ret i8 -1
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp eq i8 %b, 0
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 -1, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test10(i8 %b) {
; CHECK-LABEL: @test10(
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 42, [[B:%.*]]
; CHECK-NEXT:    ret i8 [[SHL]]
;
  %shl = shl i8 42, %b
  ret i8 %shl
}

define i8 @test11(i8 %b) {
; CHECK-LABEL: @test11(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 2
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw nsw i8 42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 2
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test12(i8 %b) {
; CHECK-LABEL: @test12(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 3
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw i8 42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 3
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test13(i8 %b) {
; CHECK-LABEL: @test13(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 4
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 4
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test14(i8 %b) {
; CHECK-LABEL: @test14(
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 -42, [[B:%.*]]
; CHECK-NEXT:    ret i8 [[SHL]]
;
  %shl = shl i8 -42, %b
  ret i8 %shl
}

define i8 @test15(i8 %b) {
; CHECK-LABEL: @test15(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 2
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nsw i8 -42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 2
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 -42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test16(i8 %b) {
; CHECK-LABEL: @test16(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[B:%.*]], 3
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 -42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp ult i8 %b, 3
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 -42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test17(i8 %b) {
; CHECK-LABEL: @test17(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i8 [[B:%.*]], 2
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw nsw i8 42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp slt i8 %b, 2
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test18(i8 %b) {
; CHECK-LABEL: @test18(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i8 [[B:%.*]], 3
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw i8 42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp slt i8 %b, 3
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i8 @test19(i8 %b) {
; CHECK-LABEL: @test19(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i8 [[B:%.*]], 4
; CHECK-NEXT:    br i1 [[CMP]], label [[BB:%.*]], label [[EXIT:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[SHL:%.*]] = shl i8 42, [[B]]
; CHECK-NEXT:    ret i8 [[SHL]]
; CHECK:       exit:
; CHECK-NEXT:    ret i8 0
;
entry:
  %cmp = icmp slt i8 %b, 4
  br i1 %cmp, label %bb, label %exit

bb:
  %shl = shl i8 42, %b
  ret i8 %shl

exit:
  ret i8 0
}

define i1 @nuw_range1(i8 %b) {
; CHECK-LABEL: @nuw_range1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C:%.*]] = add nuw nsw i8 [[B:%.*]], 1
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw i8 [[C]], 2
; CHECK-NEXT:    ret i1 false
;
entry:
  %c = add nuw nsw i8 %b, 1
  %shl = shl nuw i8 %c, 2
  %cmp = icmp eq i8 %shl, 0
  ret i1 %cmp
}

define i1 @nuw_range2(i8 %b) {
; CHECK-LABEL: @nuw_range2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C:%.*]] = add nuw nsw i8 [[B:%.*]], 3
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw i8 [[C]], 2
; CHECK-NEXT:    ret i1 false
;
entry:
  %c = add nuw nsw i8 %b, 3
  %shl = shl nuw i8 %c, 2
  %cmp = icmp ult i8 %shl, 2
  ret i1 %cmp
}

define i1 @nsw_range1(i8 %b) {
; CHECK-LABEL: @nsw_range1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C:%.*]] = add nuw nsw i8 [[B:%.*]], -3
; CHECK-NEXT:    [[SHL:%.*]] = shl nsw i8 [[C]], 2
; CHECK-NEXT:    ret i1 false
;
entry:
  %c = add nuw nsw i8 %b, -3
  %shl = shl nsw i8 %c, 2
  %cmp = icmp slt i8 %c, %shl
  ret i1 %cmp
}

define i64 @shl_nuw_nsw_test1(i32 %x) {
; CHECK-LABEL: @shl_nuw_nsw_test1(
; CHECK-NEXT:    [[SHL1:%.*]] = shl nuw nsw i32 1, [[X:%.*]]
; CHECK-NEXT:    [[ADD1:%.*]] = add nsw i32 [[SHL1]], -1
; CHECK-NEXT:    [[EXT:%.*]] = zext nneg i32 [[ADD1]] to i64
; CHECK-NEXT:    [[SHL2:%.*]] = shl nuw nsw i64 [[EXT]], 2
; CHECK-NEXT:    [[ADD2:%.*]] = add nuw nsw i64 [[SHL2]], 39
; CHECK-NEXT:    [[LSHR:%.*]] = lshr i64 [[ADD2]], 3
; CHECK-NEXT:    ret i64 [[LSHR]]
;
  %shl1 = shl nuw nsw i32 1, %x
  %add1 = add nsw i32 %shl1, -1
  %ext = sext i32 %add1 to i64
  %shl2 = shl nsw i64 %ext, 2
  %add2 = add nsw i64 %shl2, 39
  %lshr = lshr i64 %add2, 3
  %and = and i64 %lshr, 4294967295
  ret i64 %and
}

define i32 @shl_nuw_nsw_test2(i32 range(i32 -2147483248, 1) %x) {
; CHECK-LABEL: @shl_nuw_nsw_test2(
; CHECK-NEXT:    [[SHL:%.*]] = shl nsw i32 [[X:%.*]], 1
; CHECK-NEXT:    ret i32 200
;
  %shl = shl nsw i32 %x, 1
  %smax = call i32 @llvm.smax.i32(i32 %shl, i32 200)
  ret i32 %smax
}

define i64 @shl_nuw_nsw_test3(i1 %cond, i64 range(i64 1, 0) %x, i64 range(i64 3, 0) %y) {
; CHECK-LABEL: @shl_nuw_nsw_test3(
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw i64 1, [[X:%.*]]
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[COND:%.*]], i64 [[Y:%.*]], i64 [[SHL]]
; CHECK-NEXT:    ret i64 [[SEL]]
;
  %shl = shl nuw i64 1, %x
  %sel = select i1 %cond, i64 %y, i64 %shl
  %umax = call i64 @llvm.umax.i64(i64 %sel, i64 2)
  ret i64 %umax
}

define i1 @shl_nuw_nsw_test4(i32 %x, i32 range(i32 0, 32) %k) {
; CHECK-LABEL: @shl_nuw_nsw_test4(
; CHECK-NEXT:    [[CONV:%.*]] = sext i32 [[X:%.*]] to i64
; CHECK-NEXT:    [[SH_PROM:%.*]] = zext nneg i32 [[K:%.*]] to i64
; CHECK-NEXT:    [[SHL:%.*]] = shl nsw i64 [[CONV]], [[SH_PROM]]
; CHECK-NEXT:    ret i1 false
;
  %conv = sext i32 %x to i64
  %sh_prom = zext nneg i32 %k to i64
  %shl = shl nsw i64 %conv, %sh_prom
  %cmp = icmp eq i64 %shl, -9223372036854775808
  ret i1 %cmp
}

define i1 @shl_nuw_nsw_test5(i32 %x) {
; CHECK-LABEL: @shl_nuw_nsw_test5(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SHL:%.*]] = shl nuw nsw i32 768, [[X:%.*]]
; CHECK-NEXT:    [[ADD:%.*]] = add nuw nsw i32 [[SHL]], 1846
; CHECK-NEXT:    ret i1 true
;
entry:
  %shl = shl nuw nsw i32 768, %x
  %add = add nuw i32 %shl, 1846
  %cmp = icmp sgt i32 %add, 0
  ret i1 %cmp
}