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| author | Duncan Sands <baldrick@free.fr> | 2012-04-10 20:35:27 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2012-04-10 20:35:27 +0000 |
| commit | 507bb7a42fce6502f90268712cbc32158c17bb59 (patch) | |
| tree | 44d94c76c0038d4aa74b10a504e7966fd17444f1 /test | |
| parent | 3ecb447f52d169dea6663b95b5b5b43e9bb5826b (diff) | |
| download | llvm-507bb7a42fce6502f90268712cbc32158c17bb59.tar.gz llvm-507bb7a42fce6502f90268712cbc32158c17bb59.tar.bz2 llvm-507bb7a42fce6502f90268712cbc32158c17bb59.tar.xz | |
Add a comment noting that the fdiv -> fmul conversion won't generate
multiplication by a denormal, and some tests checking that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154431 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/fdiv.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fdiv.ll b/test/CodeGen/X86/fdiv.ll index 82b9190b9a..0749682e2f 100644 --- a/test/CodeGen/X86/fdiv.ll +++ b/test/CodeGen/X86/fdiv.ll @@ -23,3 +23,19 @@ define double @funky(double %x) { %div = fdiv double %x, 0.0 ret double %div } + +define double @denormal1(double %x) { +; Don't generate multiplication by a denormal. +; CHECK: @denormal1 +; CHECK: divsd + %div = fdiv double %x, 0x7FD0000000000001 + ret double %div +} + +define double @denormal2(double %x) { +; Don't generate multiplication by a denormal. +; CHECK: @denormal +; CHECK: divsd + %div = fdiv double %x, 0x7FEFFFFFFFFFFFFF + ret double %div +} |