| ; RUN: llc -mtriple=i686-- -mcpu=i486 -o - %s | FileCheck %s |
| |
| ; Main test here was that ISelDAG could cope with a MachineNode in the chain |
| ; from the first load to the "X86ISD::SUB". Previously it thought that meant no |
| ; cycle could be formed so it tried to use "sub (%eax), [[RHS]]". |
| |
| define void @gst_atomic_queue_push(i32* %addr) { |
| ; CHECK-LABEL: gst_atomic_queue_push: |
| ; CHECK: movl (%eax), [[LHS:%e[a-z]+]] |
| ; CHECK: lock orl |
| ; CHECK: movl (%eax), [[RHS:%e[a-z]+]] |
| ; CHECK: cmpl [[LHS]], [[RHS]] |
| |
| entry: |
| br label %while.body |
| |
| while.body: |
| %0 = load volatile i32, i32* %addr, align 4 |
| fence seq_cst |
| %1 = load volatile i32, i32* %addr, align 4 |
| %cmp = icmp sgt i32 %1, %0 |
| br i1 %cmp, label %while.body, label %if.then |
| |
| if.then: |
| ret void |
| } |
