| ; RUN: llc < %s -mtriple=x86_64-apple-darwin8 -misched-print-dags -o - 2>&1 > /dev/null | FileCheck %s |
| ; REQUIRES: asserts |
| |
| @sc = common global i8 0 |
| @uc = common global i8 0 |
| @ui = common global i32 0 |
| |
| ; Regression Test for PR92368. |
| ; |
| ; CHECK: SU(8): CMP8rr %4:gr8, %3:gr8, implicit-def $eflags |
| ; CHECK: Predecessors: |
| ; CHECK-NEXT: SU(6): Data Latency=0 Reg=%4 |
| ; CHECK-NEXT: SU(7): Out Latency=0 |
| ; CHECK-NEXT: SU(5): Out Latency=0 |
| ; CHECK-NEXT: SU(3): Data Latency=4 Reg=%3 |
| define void @misched_bug() nounwind { |
| entry: |
| %v0 = load i8, ptr @sc, align 1 |
| %v1 = zext i8 %v0 to i32 |
| %v2 = load i8, ptr @uc, align 1 |
| %v3 = zext i8 %v2 to i32 |
| %v4 = trunc i32 %v3 to i8 |
| %v5 = trunc i32 %v1 to i8 |
| %pair74 = cmpxchg ptr @sc, i8 %v4, i8 %v5 monotonic monotonic |
| %v6 = extractvalue { i8, i1 } %pair74, 0 |
| %v7 = icmp eq i8 %v6, %v4 |
| %v8 = zext i1 %v7 to i8 |
| %v9 = zext i8 %v8 to i32 |
| store i32 %v9, ptr @ui, align 4 |
| br label %return |
| |
| return: ; preds = %ventry |
| ret void |
| } |
| |
