| ; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -relocation-model=pic -frame-pointer=all -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-LABEL: 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 |
| ; CHECK: bb1 |
| ; CHECK: subs [[REG:r[0-9]+]], #1 |
| %tmp = tail call i32 @puts() nounwind |
| %indvar.next = add i32 %indvar, 1 |
| br label %bb2 |
| |
| bb2: ; preds = %bb1, %entry |
| ; CHECK: cmp [[REG]], #0 |
| ; CHECK: ble |
| %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 |
