141 lines
5.1 KiB
LLVM
141 lines
5.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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; Transform
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; z = (~x) & y
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; into:
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; z = ~(x | (~y))
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; iff y is free to invert and all uses of z can be freely updated.
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declare void @use1(i1)
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declare void @use8(i8)
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; Most basic positive test
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define i8 @t0(i1 %i0, i8 %v0, i8 %v1, i8 %v2, i8 %v3) {
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; CHECK-LABEL: @t0(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I0:%.*]], i1 true, i1 [[I1]]
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; CHECK-NEXT: [[I4:%.*]] = select i1 [[I3_NOT]], i8 [[V3:%.*]], i8 [[V2:%.*]]
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; CHECK-NEXT: ret i8 [[I4]]
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;
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%i1 = icmp eq i8 %v0, %v1
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%i2 = xor i1 %i0, -1
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = select i1 %i3, i8 %v2, i8 %v3
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ret i8 %i4
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}
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define i8 @t0_commutative(i1 %i0, i8 %v0, i8 %v1, i8 %v2, i8 %v3) {
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; CHECK-LABEL: @t0_commutative(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I1]], i1 true, i1 [[I0:%.*]]
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; CHECK-NEXT: [[I4:%.*]] = select i1 [[I3_NOT]], i8 [[V3:%.*]], i8 [[V2:%.*]]
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; CHECK-NEXT: ret i8 [[I4]]
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;
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%i1 = icmp eq i8 %v0, %v1
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%i2 = xor i1 %i0, -1
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%i3 = select i1 %i1, i1 %i2, i1 false
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%i4 = select i1 %i3, i8 %v2, i8 %v3
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ret i8 %i4
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}
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define i8 @t1(i8 %v0, i8 %v1, i8 %v2, i8 %v3, i8 %v4, i8 %v5) {
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; CHECK-LABEL: @t1(
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; CHECK-NEXT: [[I0:%.*]] = icmp eq i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i8 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I0]])
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I0]], i1 true, i1 [[I1]]
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; CHECK-NEXT: [[I4:%.*]] = select i1 [[I3_NOT]], i8 [[V5:%.*]], i8 [[V4:%.*]]
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; CHECK-NEXT: ret i8 [[I4]]
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;
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%i0 = icmp eq i8 %v0, %v1
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%i1 = icmp eq i8 %v2, %v3
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call void @use1(i1 %i0)
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%i2 = xor i1 %i0, -1
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = select i1 %i3, i8 %v4, i8 %v5
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ret i8 %i4
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}
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define i8 @t1_commutative(i8 %v0, i8 %v1, i8 %v2, i8 %v3, i8 %v4, i8 %v5) {
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; CHECK-LABEL: @t1_commutative(
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; CHECK-NEXT: [[I0:%.*]] = icmp eq i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i8 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I0]])
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I1]], i1 true, i1 [[I0]]
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; CHECK-NEXT: [[I4:%.*]] = select i1 [[I3_NOT]], i8 [[V5:%.*]], i8 [[V4:%.*]]
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; CHECK-NEXT: ret i8 [[I4]]
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;
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%i0 = icmp eq i8 %v0, %v1
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%i1 = icmp eq i8 %v2, %v3
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call void @use1(i1 %i0)
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%i2 = xor i1 %i0, -1
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%i3 = select i1 %i1, i1 %i2, i1 false
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%i4 = select i1 %i3, i8 %v4, i8 %v5
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ret i8 %i4
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}
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; All users of %i3 must be invertible
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define i1 @n2(i1 %i0, i8 %v0, i8 %v1, i8 %v2, i8 %v3) {
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; CHECK-LABEL: @n2(
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; CHECK-NEXT: [[I1:%.*]] = icmp eq i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = xor i1 [[I0:%.*]], true
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
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; CHECK-NEXT: ret i1 [[I3]]
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;
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%i1 = icmp eq i8 %v0, %v1
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%i2 = xor i1 %i0, -1
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%i3 = select i1 %i2, i1 %i1, i1 false
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ret i1 %i3 ; can not be inverted
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}
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; %i1 must be invertible
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define i8 @n3(i1 %i0, i8 %v0, i8 %v1, i8 %v2, i8 %v3) {
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; CHECK-LABEL: @n3(
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; CHECK-NEXT: [[I1:%.*]] = icmp eq i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I1]])
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; CHECK-NEXT: [[I2:%.*]] = xor i1 [[I0:%.*]], true
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
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; CHECK-NEXT: [[I4:%.*]] = select i1 [[I3]], i8 [[V2:%.*]], i8 [[V3:%.*]]
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; CHECK-NEXT: ret i8 [[I4]]
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;
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%i1 = icmp eq i8 %v0, %v1 ; has extra uninvertible use
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call void @use1(i1 %i1) ; bad extra use
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%i2 = xor i1 %i0, -1
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = select i1 %i3, i8 %v2, i8 %v3
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ret i8 %i4
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}
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; Extra uses are invertible
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define i8 @t4(i1 %i0, i8 %v0, i8 %v1, i8 %v2, i8 %v3, i8 %v4, i8 %v5) {
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; CHECK-LABEL: @t4(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = select i1 [[I1]], i8 [[V3:%.*]], i8 [[V2:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[I2]])
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; CHECK-NEXT: [[I4_NOT:%.*]] = select i1 [[I0:%.*]], i1 true, i1 [[I1]]
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; CHECK-NEXT: [[I5:%.*]] = select i1 [[I4_NOT]], i8 [[V5:%.*]], i8 [[V4:%.*]]
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; CHECK-NEXT: ret i8 [[I5]]
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;
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%i1 = icmp eq i8 %v0, %v1 ; has extra invertible use
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%i2 = select i1 %i1, i8 %v2, i8 %v3 ; invertible use
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call void @use8(i8 %i2)
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%i3 = xor i1 %i0, -1
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%i4 = select i1 %i3, i1 %i1, i1 false
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%i5 = select i1 %i4, i8 %v4, i8 %v5
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ret i8 %i5
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}
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define i8 @t4_commutative(i1 %i0, i8 %v0, i8 %v1, i8 %v2, i8 %v3, i8 %v4, i8 %v5) {
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; CHECK-LABEL: @t4_commutative(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i8 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = select i1 [[I1]], i8 [[V3:%.*]], i8 [[V2:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[I2]])
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; CHECK-NEXT: [[I4_NOT:%.*]] = select i1 [[I1]], i1 true, i1 [[I0:%.*]]
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; CHECK-NEXT: [[I5:%.*]] = select i1 [[I4_NOT]], i8 [[V5:%.*]], i8 [[V4:%.*]]
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; CHECK-NEXT: ret i8 [[I5]]
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;
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%i1 = icmp eq i8 %v0, %v1 ; has extra invertible use
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%i2 = select i1 %i1, i8 %v2, i8 %v3 ; invertible use
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call void @use8(i8 %i2)
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%i3 = xor i1 %i0, -1
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%i4 = select i1 %i1, i1 %i3, i1 false
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%i5 = select i1 %i4, i8 %v4, i8 %v5
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ret i8 %i5
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}
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