232 lines
7.3 KiB
LLVM
232 lines
7.3 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 both x and y are free to invert.
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declare void @use1(i1)
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; Most basic positive test
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define i1 @t0(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @t0(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
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; CHECK-NEXT: ret i1 [[I3_NOT]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i2 = icmp eq i32 %v2, %v3
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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; All operands must be invertible
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define i1 @n1(i1 %i1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @n1(
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; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1:%.*]], i1 false
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; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
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; CHECK-NEXT: ret i1 [[I4]]
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;
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%i2 = icmp eq i32 %v2, %v3
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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define i1 @n2(i32 %v0, i32 %v1, i1 %i2) {
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; CHECK-LABEL: @n2(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[NOT_I2:%.*]] = xor i1 [[I2:%.*]], true
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[NOT_I2]], i1 true, i1 [[I1]]
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; CHECK-NEXT: ret i1 [[I3]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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define i1 @n3(i1 %i1, i1 %i2) {
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; CHECK-LABEL: @n3(
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2:%.*]], i1 [[I1:%.*]], i1 false
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; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
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; CHECK-NEXT: ret i1 [[I4]]
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;
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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; All other uses of operands must be invertible
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define i1 @n4(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @n4(
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; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I1]])
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
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; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
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; CHECK-NEXT: ret i1 [[I4]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i2 = icmp eq i32 %v2, %v3
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call void @use1(i1 %i1)
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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define i1 @n5(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @n5(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I2]])
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; CHECK-NEXT: [[NOT_I2:%.*]] = xor i1 [[I2]], true
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[NOT_I2]], i1 true, i1 [[I1]]
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; CHECK-NEXT: ret i1 [[I3]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i2 = icmp eq i32 %v2, %v3
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call void @use1(i1 %i2)
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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define i1 @n6(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @n6(
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; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I1]])
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; CHECK-NEXT: call void @use1(i1 [[I2]])
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
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; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
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; CHECK-NEXT: ret i1 [[I4]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i2 = icmp eq i32 %v2, %v3
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call void @use1(i1 %i1)
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call void @use1(i1 %i2)
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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; Hands have invertible uses
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define i1 @t7(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @t7(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I1]])
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; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
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; CHECK-NEXT: ret i1 [[I3_NOT]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i1.not = xor i1 %i1, -1
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call void @use1(i1 %i1.not)
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%i2 = icmp eq i32 %v2, %v3
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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define i1 @t8(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @t8(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I2]])
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
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; CHECK-NEXT: ret i1 [[I3_NOT]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i2 = icmp eq i32 %v2, %v3
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%i2.not = xor i1 %i2, -1
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call void @use1(i1 %i2.not)
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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define i1 @t9(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @t9(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I1]])
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; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I2]])
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
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; CHECK-NEXT: ret i1 [[I3_NOT]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i1.not = xor i1 %i1, -1
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call void @use1(i1 %i1.not)
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%i2 = icmp eq i32 %v2, %v3
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%i2.not = xor i1 %i2, -1
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call void @use1(i1 %i2.not)
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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; Select can have other uses
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; Not all uses can be adapted
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define i1 @n10(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
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; CHECK-LABEL: @n10(
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; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
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; CHECK-NEXT: call void @use1(i1 [[I3]])
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; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
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; CHECK-NEXT: ret i1 [[I4]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i2 = icmp eq i32 %v2, %v3
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%i3 = select i1 %i2, i1 %i1, i1 false
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call void @use1(i1 %i3)
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%i4 = xor i1 %i3, -1
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ret i1 %i4
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}
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; All other uses can be adapted.
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define i1 @t11(i32 %v0, i32 %v1, i32 %v2, i32 %v3, i1 %v4, i1 %v5) {
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; CHECK-LABEL: @t11(
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; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
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; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
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; CHECK-NEXT: [[I3_NOT:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
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; CHECK-NEXT: [[I5:%.*]] = select i1 [[I3_NOT]], i1 [[V5:%.*]], i1 [[V4:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[I5]])
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; CHECK-NEXT: ret i1 [[I3_NOT]]
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;
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%i1 = icmp eq i32 %v0, %v1
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%i2 = icmp eq i32 %v2, %v3
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%i3 = select i1 %i2, i1 %i1, i1 false
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%i4 = xor i1 %i3, -1
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%i5 = select i1 %i3, i1 %v4, i1 %v5
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call void @use1(i1 %i5)
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ret i1 %i4
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}
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; This would miscompile by not handling the unsimplified select correctly.
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define i1 @PR59704(i1 %c, i1 %b, i64 %arg) {
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; CHECK-LABEL: @PR59704(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i64 [[ARG:%.*]], 0
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; CHECK-NEXT: br label [[JOIN]]
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; CHECK: join:
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; CHECK-NEXT: [[PHI:%.*]] = phi i1 [ true, [[ENTRY:%.*]] ], [ [[CMP_NOT]], [[IF]] ]
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; CHECK-NEXT: ret i1 [[PHI]]
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;
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entry:
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br i1 %c, label %if, label %join
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if:
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%cmp = icmp ne i64 %arg, 0
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%and = select i1 %cmp, i1 %cmp, i1 false
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br label %join
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join:
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%phi = phi i1 [ false, %entry ], [ %and, %if ]
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%not = xor i1 %phi, true
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ret i1 %not
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}
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