diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2007-12-14 02:13:44 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-12-14 02:13:44 +0000 |
| commit | e9fbc3f014c82ebed8cb1fad28ae48811272c225 (patch) | |
| tree | c5be4347306adad5128c25e33cb763cbf56e6380 /llvm/test/CodeGen/X86/clz.ll | |
| parent | d4d8c3c71785f89f4970b41c0c27f8f553099382 (diff) | |
| download | bcm5719-llvm-e9fbc3f014c82ebed8cb1fad28ae48811272c225.tar.gz bcm5719-llvm-e9fbc3f014c82ebed8cb1fad28ae48811272c225.zip | |
Implement ctlz and cttz with bsr and bsf.
llvm-svn: 45024
Diffstat (limited to 'llvm/test/CodeGen/X86/clz.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/clz.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/clz.ll b/llvm/test/CodeGen/X86/clz.ll new file mode 100644 index 00000000000..0505529cc48 --- /dev/null +++ b/llvm/test/CodeGen/X86/clz.ll @@ -0,0 +1,16 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep bsr +; RUN: llvm-as < %s | llc -march=x86 | grep bsf + +define i32 @t1(i32 %x) nounwind { + %tmp = tail call i32 @llvm.ctlz.i32( i32 %x ) + ret i32 %tmp +} + +declare i32 @llvm.ctlz.i32(i32) nounwind readnone + +define i32 @t2(i32 %x) nounwind { + %tmp = tail call i32 @llvm.cttz.i32( i32 %x ) + ret i32 %tmp +} + +declare i32 @llvm.cttz.i32(i32) nounwind readnone |
