forked from OSchip/llvm-project
117 lines
3.9 KiB
LLVM
117 lines
3.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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declare void @use(i1)
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; X == 42.0 ? X : 42.0 --> 42.0
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define double @oeq(double %x) {
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; CHECK-LABEL: @oeq(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[X:%.*]], 4.200000e+01
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: ret double 4.200000e+01
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;
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%cmp = fcmp oeq double %x, 42.0
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, double %x, double 42.0
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ret double %cond
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}
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; X == 42.0 ? 42.0 : X --> X
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define float @oeq_swapped(float %x) {
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; CHECK-LABEL: @oeq_swapped(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq float [[X:%.*]], 4.200000e+01
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: ret float [[X]]
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;
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%cmp = fcmp oeq float %x, 42.0
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, float 42.0, float %x
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ret float %cond
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}
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; x != y ? x : y -> x if it's the right kind of != and at least
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; one of x and y is not negative zero.
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; X != 42.0 ? X : 42.0 --> X
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define double @une(double %x) {
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; CHECK-LABEL: @une(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 4.200000e+01
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: ret double [[X]]
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;
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%cmp = fcmp une double %x, 42.0
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, double %x, double 42.0
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ret double %cond
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}
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; X != 42.0 ? 42.0 : X --> 42.0
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define double @une_swapped(double %x) {
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; CHECK-LABEL: @une_swapped(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 4.200000e+01
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: ret double 4.200000e+01
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;
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%cmp = fcmp une double %x, 42.0
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, double 42.0, double %x
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ret double %cond
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}
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define double @une_could_be_negzero(double %x, double %y) {
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; CHECK-LABEL: @une_could_be_negzero(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double [[Y]]
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; CHECK-NEXT: ret double [[COND]]
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;
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%cmp = fcmp une double %x, %y
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, double %x, double %y
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ret double %cond
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}
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define double @une_swapped_could_be_negzero(double %x, double %y) {
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; CHECK-LABEL: @une_swapped_could_be_negzero(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[Y]], double [[X]]
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; CHECK-NEXT: ret double [[COND]]
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;
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%cmp = fcmp une double %x, %y
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, double %y, double %x
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ret double %cond
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}
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define double @one(double %x) {
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; CHECK-LABEL: @one(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp one double [[X:%.*]], -1.000000e+00
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double -1.000000e+00
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; CHECK-NEXT: ret double [[COND]]
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;
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%cmp = fcmp one double %x, -1.0
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, double %x, double -1.0
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ret double %cond
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}
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define double @one_swapped(double %x) {
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; CHECK-LABEL: @one_swapped(
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; CHECK-NEXT: [[CMP:%.*]] = fcmp one double [[X:%.*]], -1.000000e+00
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double -1.000000e+00, double [[X]]
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; CHECK-NEXT: ret double [[COND]]
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;
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%cmp = fcmp one double %x, -1.0
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call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization
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%cond = select i1 %cmp, double -1.0, double %x
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ret double %cond
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}
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