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| author | Eli Friedman <eli.friedman@gmail.com> | 2009-06-16 06:58:29 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2009-06-16 06:58:29 +0000 |
| commit | abfad5d61ec2c0b825a0e697553714756034243f (patch) | |
| tree | a1f797187663fc5bbb6676d90f04b419a2b67f40 /llvm/test/CodeGen/X86/umul-with-overflow.ll | |
| parent | 48021d15d6b50376069f697c6266812244e788f3 (diff) | |
| download | bcm5719-llvm-abfad5d61ec2c0b825a0e697553714756034243f.tar.gz bcm5719-llvm-abfad5d61ec2c0b825a0e697553714756034243f.zip | |
Add some generic expansion logic for SMULO and UMULO. Fixes UMULO
support for x86, and UMULO/SMULO for many architectures, including PPC
(PR4201), ARM, and Cell. The resulting expansion isn't perfect, but it's
not bad.
llvm-svn: 73477
Diffstat (limited to 'llvm/test/CodeGen/X86/umul-with-overflow.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/umul-with-overflow.ll | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/umul-with-overflow.ll b/llvm/test/CodeGen/X86/umul-with-overflow.ll new file mode 100644 index 00000000000..9e69154f10f --- /dev/null +++ b/llvm/test/CodeGen/X86/umul-with-overflow.ll @@ -0,0 +1,8 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep "\\\\\\\<mul" + +declare {i32, i1} @llvm.umul.with.overflow.i32(i32 %a, i32 %b) +define i1 @a(i32 %x) zeroext nounwind { + %res = call {i32, i1} @llvm.umul.with.overflow.i32(i32 %x, i32 3) + %obil = extractvalue {i32, i1} %res, 1 + ret i1 %obil +} |
