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21dc20cbd6
handle NaN properly. Do (X une Y) ? X : Y -> X if one of X and Y is not zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96955 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.3 KiB
LLVM
54 lines
1.3 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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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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; CHECK: f0
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; CHECK: ret double %x
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define double @f0(double %x) nounwind readnone {
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entry:
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%cmp = fcmp une double %x, -1.0
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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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; CHECK: f1
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; CHECK: ret double -1.000000e+00
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define double @f1(double %x) nounwind readnone {
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entry:
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%cmp = fcmp une double %x, -1.0
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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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; CHECK: f2
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; CHECK: ret double %cond
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define double @f2(double %x, double %y) nounwind readnone {
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entry:
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%cmp = fcmp une double %x, %y
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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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; CHECK: f3
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; CHECK: ret double %cond
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define double @f3(double %x, double %y) nounwind readnone {
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entry:
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%cmp = fcmp une double %x, %y
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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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; CHECK: f4
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; CHECK: ret double %cond
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define double @f4(double %x) nounwind readnone {
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entry:
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%cmp = fcmp one double %x, -1.0
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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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; CHECK: f5
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; CHECK: ret double %cond
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define double @f5(double %x) nounwind readnone {
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entry:
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%cmp = fcmp one double %x, -1.0
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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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