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| author | Owen Anderson <resistor@mac.com> | 2013-07-30 23:53:17 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2013-07-30 23:53:17 +0000 |
| commit | c7be519dc004a51cbb2db1ab8c450eec9d2305eb (patch) | |
| tree | b5d8a7e7c5630febce28147d3437444139530cef /llvm/test/Transforms | |
| parent | a0016db818aecc14486b93c8f1f72642cac4e5de (diff) | |
| download | bcm5719-llvm-c7be519dc004a51cbb2db1ab8c450eec9d2305eb.tar.gz bcm5719-llvm-c7be519dc004a51cbb2db1ab8c450eec9d2305eb.zip | |
Preserve fast-math flags when folding (fsub x, (fneg y)) to (fadd x, y).
llvm-svn: 187462
Diffstat (limited to 'llvm/test/Transforms')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/fneg-ext.ll | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/fneg-ext.ll b/llvm/test/Transforms/InstCombine/fneg-ext.ll index 49ad2325261..922d26a465b 100644 --- a/llvm/test/Transforms/InstCombine/fneg-ext.ll +++ b/llvm/test/Transforms/InstCombine/fneg-ext.ll @@ -10,3 +10,14 @@ define double @test1(float %a, double %b) nounwind readnone ssp uwtable { %3 = fsub double %b, %2 ret double %3 } + +; CHECK: test2 +define double @test2(float %a, double %b) nounwind readnone ssp uwtable { +; CHECK-NOT: fsub +; CHECK: fpext +; CHECK: fadd fast + %1 = fsub float -0.000000e+00, %a + %2 = fpext float %1 to double + %3 = fsub fast double %b, %2 + ret double %3 +} |
