Commit 93073e52 authored by Sanjay Patel's avatar Sanjay Patel
Browse files

[InstCombine] add tests for abs with extra use of operand; NFC

parent 04a830f8

llvm/test/Transforms/InstCombine/abs-1.ll

+59 −0
Original line number Diff line number Diff line
@@ -569,3 +569,62 @@ define i1 @abs_must_be_positive(i32 %x) { 
  ret i1 %c2

}



define i8 @abs_swapped(i8 %a) {

; CHECK-LABEL: @abs_swapped(

; CHECK-NEXT:    [[NEG:%.*]] = sub i8 0, [[A:%.*]]

; CHECK-NEXT:    call void @extra_use(i8 [[NEG]])

; CHECK-NEXT:    [[CMP1:%.*]] = icmp sgt i8 [[A]], 0

; CHECK-NEXT:    [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]]

; CHECK-NEXT:    ret i8 [[M1]]

;

  %neg = sub i8 0, %a

  call void @extra_use(i8 %neg)

  %cmp1 = icmp sgt i8 %a, 0

  %m1 = select i1 %cmp1, i8 %a, i8 %neg

  ret i8 %m1

}



define i8 @nabs_swapped(i8 %a) {

; CHECK-LABEL: @nabs_swapped(

; CHECK-NEXT:    [[NEG:%.*]] = sub i8 0, [[A:%.*]]

; CHECK-NEXT:    call void @extra_use(i8 [[NEG]])

; CHECK-NEXT:    [[CMP2:%.*]] = icmp sgt i8 [[A]], 0

; CHECK-NEXT:    [[M2:%.*]] = select i1 [[CMP2]], i8 [[NEG]], i8 [[A]]

; CHECK-NEXT:    ret i8 [[M2]]

;

  %neg = sub i8 0, %a

  call void @extra_use(i8 %neg)

  %cmp2 = icmp sgt i8 %a, 0

  %m2 = select i1 %cmp2, i8 %neg, i8 %a

  ret i8 %m2

}



define i8 @abs_different_constants(i8 %a) {

; CHECK-LABEL: @abs_different_constants(

; CHECK-NEXT:    [[NEG:%.*]] = sub i8 0, [[A:%.*]]

; CHECK-NEXT:    call void @extra_use(i8 [[NEG]])

; CHECK-NEXT:    [[CMP1:%.*]] = icmp sgt i8 [[A]], -1

; CHECK-NEXT:    [[M1:%.*]] = select i1 [[CMP1]], i8 [[A]], i8 [[NEG]]

; CHECK-NEXT:    ret i8 [[M1]]

;

  %neg = sub i8 0, %a

  call void @extra_use(i8 %neg)

  %cmp1 = icmp sgt i8 %a, -1

  %m1 = select i1 %cmp1, i8 %a, i8 %neg

  ret i8 %m1

}



define i8 @nabs_different_constants(i8 %a) {

; CHECK-LABEL: @nabs_different_constants(

; CHECK-NEXT:    [[NEG:%.*]] = sub i8 0, [[A:%.*]]

; CHECK-NEXT:    call void @extra_use(i8 [[NEG]])

; CHECK-NEXT:    [[CMP2:%.*]] = icmp sgt i8 [[A]], -1

; CHECK-NEXT:    [[M2:%.*]] = select i1 [[CMP2]], i8 [[NEG]], i8 [[A]]

; CHECK-NEXT:    ret i8 [[M2]]

;

  %neg = sub i8 0, %a

  call void @extra_use(i8 %neg)

  %cmp2 = icmp sgt i8 %a, -1

  %m2 = select i1 %cmp2, i8 %neg, i8 %a

  ret i8 %m2

}