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| author | Bill Wendling <isanbard@gmail.com> | 2008-12-12 21:15:41 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-12-12 21:15:41 +0000 |
| commit | d350e02e19e1b79c3fd6dc70ee3c01ab75c631c1 (patch) | |
| tree | e5c17479912ec8f1df32e32174f7d2df441a861b /test/CodeGen/X86/umul-with-carry.ll | |
| parent | e062b076893f96a7485e07ed94a49d6c6644076a (diff) | |
| download | llvm-d350e02e19e1b79c3fd6dc70ee3c01ab75c631c1.tar.gz llvm-d350e02e19e1b79c3fd6dc70ee3c01ab75c631c1.tar.bz2 llvm-d350e02e19e1b79c3fd6dc70ee3c01ab75c631c1.tar.xz | |
- Use patterns instead of creating completely new instruction matching patterns,
which are identical to the original patterns.
- Change the multiply with overflow so that we distinguish between signed and
unsigned multiplication. Currently, unsigned multiplication with overflow
isn't working!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60963 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/umul-with-carry.ll')
| -rw-r--r-- | test/CodeGen/X86/umul-with-carry.ll | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/CodeGen/X86/umul-with-carry.ll b/test/CodeGen/X86/umul-with-carry.ll new file mode 100644 index 0000000000..547e179bb2 --- /dev/null +++ b/test/CodeGen/X86/umul-with-carry.ll @@ -0,0 +1,26 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep {jc} | count 1 +; XFAIL: * + +; FIXME: umul-with-overflow not supported yet. + +@ok = internal constant [4 x i8] c"%d\0A\00" +@no = internal constant [4 x i8] c"no\0A\00" + +define i1 @func(i32 %v1, i32 %v2) nounwind { +entry: + %t = call {i32, i1} @llvm.umul.with.overflow.i32(i32 %v1, i32 %v2) + %sum = extractvalue {i32, i1} %t, 0 + %obit = extractvalue {i32, i1} %t, 1 + br i1 %obit, label %carry, label %normal + +normal: + %t1 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @ok, i32 0, i32 0), i32 %sum ) nounwind + ret i1 true + +carry: + %t2 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @no, i32 0, i32 0) ) nounwind + ret i1 false +} + +declare i32 @printf(i8*, ...) nounwind +declare {i32, i1} @llvm.umul.with.overflow.i32(i32, i32) |