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| author | Ahmed Bougacha <ahmed.bougacha@gmail.com> | 2015-05-29 00:04:30 +0000 |
|---|---|---|
| committer | Ahmed Bougacha <ahmed.bougacha@gmail.com> | 2015-05-29 00:04:30 +0000 |
| commit | 0ea9d1e7531e2ba74691c5e0836b224c95c0ac95 (patch) | |
| tree | da39a610ba8235b7dfac3fe6520106a5563ce795 /llvm/test/Transforms/InstCombine/fpcast.ll | |
| parent | b30c50c8fae80824ea0afe1e17a94f54e21151c9 (diff) | |
| download | bcm5719-llvm-0ea9d1e7531e2ba74691c5e0836b224c95c0ac95.tar.gz bcm5719-llvm-0ea9d1e7531e2ba74691c5e0836b224c95c0ac95.zip | |
[IR] fptrunc-of-fptrunc isn't an EliminableCastPair.
Double and single rounding can produce different results.
This is the IR counterpart to r228911.
llvm-svn: 238531
Diffstat (limited to 'llvm/test/Transforms/InstCombine/fpcast.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/fpcast.ll | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/fpcast.ll b/llvm/test/Transforms/InstCombine/fpcast.ll index 8319624b87c..93a64e6b49b 100644 --- a/llvm/test/Transforms/InstCombine/fpcast.ll +++ b/llvm/test/Transforms/InstCombine/fpcast.ll @@ -85,3 +85,11 @@ define float @test8(float %V) { ; CHECK-NEXT: %[[trunc:.*]] = fptrunc double %frem to float ; CHECK-NEXT: ret float %trunc } + +; CHECK-LABEL: @test_fptrunc_fptrunc +; CHECK-NOT: fptrunc double {{.*}} to half +define half @test_fptrunc_fptrunc(double %V) { + %t1 = fptrunc double %V to float + %t2 = fptrunc float %t1 to half + ret half %t2 +} |
