| ; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -relocation-model=pic -disable-fp-elim -mcpu=cortex-a8 | FileCheck %s | |
| ; subs r4, #1 | |
| ; cmp r4, 0 | |
| ; bgt | |
| ; cmp cannot be optimized away since it will clear the overflow bit. | |
| ; gt / ge, lt, le conditions all depend on V bit. | |
| ; rdar://9172742 | |
| define i32 @t() nounwind { | |
| ; CHECK: t: | |
| entry: | |
| br label %bb2 | |
| bb: ; preds = %bb2 | |
| %0 = tail call i32 @rand() nounwind | |
| %1 = icmp eq i32 %0, 50 | |
| br i1 %1, label %bb3, label %bb1 | |
| bb1: ; preds = %bb | |
| %tmp = tail call i32 @puts() nounwind | |
| %indvar.next = add i32 %indvar, 1 | |
| br label %bb2 | |
| bb2: ; preds = %bb1, %entry | |
| ; CHECK: bb2 | |
| ; CHECK: subs [[REG:r[0-9]+]], #1 | |
| ; CHECK: cmp [[REG]], #0 | |
| ; CHECK: bgt | |
| %indvar = phi i32 [ %indvar.next, %bb1 ], [ 0, %entry ] | |
| %tries.0 = sub i32 2147483647, %indvar | |
| %tmp1 = icmp sgt i32 %tries.0, 0 | |
| br i1 %tmp1, label %bb, label %bb3 | |
| bb3: ; preds = %bb2, %bb | |
| ret i32 0 | |
| } | |
| declare i32 @rand() | |
| declare i32 @puts() nounwind |