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|
; RUN: opt < %s -S -early-cse | FileCheck %s
; RUN: opt < %s -S -basicaa -early-cse-memssa | FileCheck %s
define void @test1(float %A, float %B, float* %PA, float* %PB) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[C:%.*]] = fadd float %A, %B
; CHECK-NEXT: store float [[C]], float* %PA
; CHECK-NEXT: store float [[C]], float* %PB
; CHECK-NEXT: ret void
;
%C = fadd float %A, %B
store float %C, float* %PA
%D = fadd float %B, %A
store float %D, float* %PB
ret void
}
define void @test2(float %A, float %B, i1* %PA, i1* %PB) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[C:%.*]] = fcmp oeq float %A, %B
; CHECK-NEXT: store i1 [[C]], i1* %PA
; CHECK-NEXT: store i1 [[C]], i1* %PB
; CHECK-NEXT: ret void
;
%C = fcmp oeq float %A, %B
store i1 %C, i1* %PA
%D = fcmp oeq float %B, %A
store i1 %D, i1* %PB
ret void
}
define void @test3(float %A, float %B, i1* %PA, i1* %PB) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[C:%.*]] = fcmp uge float %A, %B
; CHECK-NEXT: store i1 [[C]], i1* %PA
; CHECK-NEXT: store i1 [[C]], i1* %PB
; CHECK-NEXT: ret void
;
%C = fcmp uge float %A, %B
store i1 %C, i1* %PA
%D = fcmp ule float %B, %A
store i1 %D, i1* %PB
ret void
}
define void @test4(i32 %A, i32 %B, i1* %PA, i1* %PB) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 %A, %B
; CHECK-NEXT: store i1 [[C]], i1* %PA
; CHECK-NEXT: store i1 [[C]], i1* %PB
; CHECK-NEXT: ret void
;
%C = icmp eq i32 %A, %B
store i1 %C, i1* %PA
%D = icmp eq i32 %B, %A
store i1 %D, i1* %PB
ret void
}
define void @test5(i32 %A, i32 %B, i1* %PA, i1* %PB) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 %A, %B
; CHECK-NEXT: store i1 [[C]], i1* %PA
; CHECK-NEXT: store i1 [[C]], i1* %PB
; CHECK-NEXT: ret void
;
%C = icmp sgt i32 %A, %B
store i1 %C, i1* %PA
%D = icmp slt i32 %B, %A
store i1 %D, i1* %PB
ret void
}
; Min/max operands may be commuted in the compare and select.
define i8 @smin_commute(i8 %a, i8 %b) {
; CHECK-LABEL: @smin_commute(
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 %b, %a
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
; CHECK-NEXT: [[R:%.*]] = mul i8 [[M1]], [[M1]]
; CHECK-NEXT: ret i8 [[R]]
;
%cmp1 = icmp slt i8 %a, %b
%cmp2 = icmp slt i8 %b, %a
%m1 = select i1 %cmp1, i8 %a, i8 %b
%m2 = select i1 %cmp2, i8 %b, i8 %a
%r = mul i8 %m1, %m2
ret i8 %r
}
; Min/max can also have a swapped predicate and select operands.
define i1 @smin_swapped(i8 %a, i8 %b) {
; CHECK-LABEL: @smin_swapped(
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 %a, %b
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %b, i8 %a
; CHECK-NEXT: ret i1 true
;
%cmp1 = icmp sgt i8 %a, %b
%cmp2 = icmp slt i8 %a, %b
%m1 = select i1 %cmp1, i8 %b, i8 %a
%m2 = select i1 %cmp2, i8 %a, i8 %b
%r = icmp eq i8 %m2, %m1
ret i1 %r
}
define i8 @smax_commute(i8 %a, i8 %b) {
; CHECK-LABEL: @smax_commute(
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 %b, %a
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
; CHECK-NEXT: ret i8 0
;
%cmp1 = icmp sgt i8 %a, %b
%cmp2 = icmp sgt i8 %b, %a
%m1 = select i1 %cmp1, i8 %a, i8 %b
%m2 = select i1 %cmp2, i8 %b, i8 %a
%r = urem i8 %m2, %m1
ret i8 %r
}
define i8 @smax_swapped(i8 %a, i8 %b) {
; CHECK-LABEL: @smax_swapped(
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 %a, %b
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %b, i8 %a
; CHECK-NEXT: ret i8 1
;
%cmp1 = icmp slt i8 %a, %b
%cmp2 = icmp sgt i8 %a, %b
%m1 = select i1 %cmp1, i8 %b, i8 %a
%m2 = select i1 %cmp2, i8 %a, i8 %b
%r = sdiv i8 %m1, %m2
ret i8 %r
}
define i8 @umin_commute(i8 %a, i8 %b) {
; CHECK-LABEL: @umin_commute(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i8 %b, %a
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
; CHECK-NEXT: ret i8 0
;
%cmp1 = icmp ult i8 %a, %b
%cmp2 = icmp ult i8 %b, %a
%m1 = select i1 %cmp1, i8 %a, i8 %b
%m2 = select i1 %cmp2, i8 %b, i8 %a
%r = sub i8 %m2, %m1
ret i8 %r
}
; Choose a vector type just to show that works.
define <2 x i8> @umin_swapped(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @umin_swapped(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt <2 x i8> %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult <2 x i8> %a, %b
; CHECK-NEXT: [[M1:%.*]] = select <2 x i1> [[CMP1]], <2 x i8> %b, <2 x i8> %a
; CHECK-NEXT: ret <2 x i8> zeroinitializer
;
%cmp1 = icmp ugt <2 x i8> %a, %b
%cmp2 = icmp ult <2 x i8> %a, %b
%m1 = select <2 x i1> %cmp1, <2 x i8> %b, <2 x i8> %a
%m2 = select <2 x i1> %cmp2, <2 x i8> %a, <2 x i8> %b
%r = sub <2 x i8> %m2, %m1
ret <2 x i8> %r
}
define i8 @umax_commute(i8 %a, i8 %b) {
; CHECK-LABEL: @umax_commute(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i8 %b, %a
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 %b
; CHECK-NEXT: ret i8 1
;
%cmp1 = icmp ugt i8 %a, %b
%cmp2 = icmp ugt i8 %b, %a
%m1 = select i1 %cmp1, i8 %a, i8 %b
%m2 = select i1 %cmp2, i8 %b, i8 %a
%r = udiv i8 %m1, %m2
ret i8 %r
}
define i8 @umax_swapped(i8 %a, i8 %b) {
; CHECK-LABEL: @umax_swapped(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i8 %a, %b
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %b, i8 %a
; CHECK-NEXT: [[R:%.*]] = add i8 [[M1]], [[M1]]
; CHECK-NEXT: ret i8 [[R]]
;
%cmp1 = icmp ult i8 %a, %b
%cmp2 = icmp ugt i8 %a, %b
%m1 = select i1 %cmp1, i8 %b, i8 %a
%m2 = select i1 %cmp2, i8 %a, i8 %b
%r = add i8 %m2, %m1
ret i8 %r
}
; Min/max may exist with non-canonical operands. Value tracking can match those.
define i8 @smax_nsw(i8 %a, i8 %b) {
; CHECK-LABEL: @smax_nsw(
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 %a, %b
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 %a, %b
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 [[SUB]], 0
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 0, i8 [[SUB]]
; CHECK-NEXT: ret i8 0
;
%sub = sub nsw i8 %a, %b
%cmp1 = icmp slt i8 %a, %b
%cmp2 = icmp sgt i8 %sub, 0
%m1 = select i1 %cmp1, i8 0, i8 %sub
%m2 = select i1 %cmp2, i8 %sub, i8 0
%r = sub i8 %m2, %m1
ret i8 %r
}
define i8 @abs_swapped(i8 %a) {
; CHECK-LABEL: @abs_swapped(
; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, %a
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 %a, 0
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 %a, 0
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 [[NEG]]
; CHECK-NEXT: ret i8 [[M1]]
;
%neg = sub i8 0, %a
%cmp1 = icmp sgt i8 %a, 0
%cmp2 = icmp slt i8 %a, 0
%m1 = select i1 %cmp1, i8 %a, i8 %neg
%m2 = select i1 %cmp2, i8 %neg, i8 %a
%r = or i8 %m2, %m1
ret i8 %r
}
define i8 @nabs_swapped(i8 %a) {
; CHECK-LABEL: @nabs_swapped(
; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, %a
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 %a, 0
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 %a, 0
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 [[NEG]]
; CHECK-NEXT: ret i8 0
;
%neg = sub i8 0, %a
%cmp1 = icmp slt i8 %a, 0
%cmp2 = icmp sgt i8 %a, 0
%m1 = select i1 %cmp1, i8 %a, i8 %neg
%m2 = select i1 %cmp2, i8 %neg, i8 %a
%r = xor i8 %m2, %m1
ret i8 %r
}
; These two tests make sure we still consider it a match when the RHS of the
; compares are different.
define i8 @abs_different_constants(i8 %a) {
; CHECK-LABEL: @abs_different_constants(
; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, %a
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 %a, -1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i8 %a, 0
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 [[NEG]]
; CHECK-NEXT: ret i8 [[M1]]
;
%neg = sub i8 0, %a
%cmp1 = icmp sgt i8 %a, -1
%cmp2 = icmp slt i8 %a, 0
%m1 = select i1 %cmp1, i8 %a, i8 %neg
%m2 = select i1 %cmp2, i8 %neg, i8 %a
%r = or i8 %m2, %m1
ret i8 %r
}
define i8 @nabs_different_constants(i8 %a) {
; CHECK-LABEL: @nabs_different_constants(
; CHECK-NEXT: [[NEG:%.*]] = sub i8 0, %a
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i8 %a, 0
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 %a, -1
; CHECK-NEXT: [[M1:%.*]] = select i1 [[CMP1]], i8 %a, i8 [[NEG]]
; CHECK-NEXT: ret i8 0
;
%neg = sub i8 0, %a
%cmp1 = icmp slt i8 %a, 0
%cmp2 = icmp sgt i8 %a, -1
%m1 = select i1 %cmp1, i8 %a, i8 %neg
%m2 = select i1 %cmp2, i8 %neg, i8 %a
%r = xor i8 %m2, %m1
ret i8 %r
}
|
