diff options
| -rw-r--r-- | test/CodeGen/ARM/fold-const.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/fold-const.ll b/test/CodeGen/ARM/fold-const.ll new file mode 100644 index 0000000..227e4e8 --- /dev/null +++ b/test/CodeGen/ARM/fold-const.ll @@ -0,0 +1,14 @@ +; RUN: llc < %s -march=arm -mattr=+v7 | FileCheck %s + +define i32 @f(i32 %a) nounwind readnone optsize ssp { +entry: + %conv = zext i32 %a to i64 + %tmp1 = tail call i64 @llvm.ctlz.i64(i64 %conv) +; CHECK: clz +; CHECK-NOT: adds + %cast = trunc i64 %tmp1 to i32 + %sub = sub nsw i32 63, %cast + ret i32 %sub +} + +declare i64 @llvm.ctlz.i64(i64) nounwind readnone |