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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 | db3c169f3a3102d40352ba63fd14a75c819c7adc (patch) | |
| tree | 2c07300d6c140827d397acdc72585d7ffbb0da8a /test/CodeGen/X86/umul-with-overflow.ll | |
| parent | 6314ac2bca0dfad6951931862b75a4586c9c8249 (diff) | |
| download | llvm-db3c169f3a3102d40352ba63fd14a75c819c7adc.tar.gz llvm-db3c169f3a3102d40352ba63fd14a75c819c7adc.tar.bz2 llvm-db3c169f3a3102d40352ba63fd14a75c819c7adc.tar.xz | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73477 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/umul-with-overflow.ll')
| -rw-r--r-- | test/CodeGen/X86/umul-with-overflow.ll | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/test/CodeGen/X86/umul-with-overflow.ll b/test/CodeGen/X86/umul-with-overflow.ll new file mode 100644 index 0000000000..9e69154f10 --- /dev/null +++ b/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 +} |