| Eric Christopher | 2b88e8f | 2011-07-14 06:23:09 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=arm -mattr=+v7 | FileCheck %s |
| 2 | |
| 3 | define i32 @f(i32 %a) nounwind readnone optsize ssp { |
| 4 | entry: |
| 5 | %conv = zext i32 %a to i64 |
| Chandler Carruth | ddbc274 | 2011-12-12 11:59:10 +0000 | [diff] [blame] | 6 | %tmp1 = tail call i64 @llvm.ctlz.i64(i64 %conv, i1 true) |
| Eric Christopher | 2b88e8f | 2011-07-14 06:23:09 +0000 | [diff] [blame] | 7 | ; CHECK: clz |
| 8 | ; CHECK-NOT: adds |
| 9 | %cast = trunc i64 %tmp1 to i32 |
| 10 | %sub = sub nsw i32 63, %cast |
| 11 | ret i32 %sub |
| 12 | } |
| 13 | |
| Chandler Carruth | ddbc274 | 2011-12-12 11:59:10 +0000 | [diff] [blame] | 14 | declare i64 @llvm.ctlz.i64(i64, i1) nounwind readnone |