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| author | Evan Cheng <evan.cheng@apple.com> | 2009-01-27 03:30:42 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-01-27 03:30:42 +0000 |
| commit | 6a86bd71df6114ce3435b6fda70573f8c1ff80cf (patch) | |
| tree | 4e40de51fbcc4837f84a94190e7ad36dd33d3866 /test/CodeGen/X86/smul-with-overflow-2.ll | |
| parent | ccc497f15223f146b8bdad265a6cd1604bf6f82f (diff) | |
| download | external_llvm-6a86bd71df6114ce3435b6fda70573f8c1ff80cf.zip external_llvm-6a86bd71df6114ce3435b6fda70573f8c1ff80cf.tar.gz external_llvm-6a86bd71df6114ce3435b6fda70573f8c1ff80cf.tar.bz2 | |
Implement multiple with overflow by 2 with an add instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63090 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/smul-with-overflow-2.ll')
| -rw-r--r-- | test/CodeGen/X86/smul-with-overflow-2.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/CodeGen/X86/smul-with-overflow-2.ll b/test/CodeGen/X86/smul-with-overflow-2.ll new file mode 100644 index 0000000..c3dbfd7 --- /dev/null +++ b/test/CodeGen/X86/smul-with-overflow-2.ll @@ -0,0 +1,20 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep mul | count 1 +; RUN: llvm-as < %s | llc -march=x86 | grep add | count 3 + +define i32 @t1(i32 %a, i32 %b) nounwind readnone { +entry: + %tmp0 = add i32 %b, %a + %tmp1 = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %tmp0, i32 2) + %tmp2 = extractvalue { i32, i1 } %tmp1, 0 + ret i32 %tmp2 +} + +define i32 @t2(i32 %a, i32 %b) nounwind readnone { +entry: + %tmp0 = add i32 %b, %a + %tmp1 = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %tmp0, i32 4) + %tmp2 = extractvalue { i32, i1 } %tmp1, 0 + ret i32 %tmp2 +} + +declare { i32, i1 } @llvm.smul.with.overflow.i32(i32, i32) nounwind |