diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM/sub-cmp-peephole.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/sub-cmp-peephole.ll b/test/CodeGen/ARM/sub-cmp-peephole.ll index c46c891..6fcbdee 100644 --- a/test/CodeGen/ARM/sub-cmp-peephole.ll +++ b/test/CodeGen/ARM/sub-cmp-peephole.ll @@ -44,3 +44,22 @@ entry: %sub. = select i1 %cmp, i32 %sub, i32 0 ret i32 %sub. } +; If CPSR is live-out, we can't remove cmp if there exists +; a swapped sub. +define i32 @j(i32 %a, i32 %b) nounwind { +entry: +; CHECK: j: +; CHECK: sub +; CHECK: cmp + %cmp = icmp eq i32 %b, %a + %sub = sub nsw i32 %a, %b + br i1 %cmp, label %if.then, label %if.else + +if.then: + %cmp2 = icmp sgt i32 %b, %a + %sel = select i1 %cmp2, i32 %sub, i32 %a + ret i32 %sel + +if.else: + ret i32 %sub +} |