1; RUN: llc < %s -mtriple=x86_64-apple-darwin8 -misched-print-dags -o - 2>&1 > /dev/null | FileCheck %s 2; REQUIRES: asserts 3 4@sc = common global i8 0 5@uc = common global i8 0 6@ui = common global i32 0 7 8; Regression Test for PR92368. 9; 10; CHECK: SU(8): CMP8rr %4:gr8, %3:gr8, implicit-def $eflags 11; CHECK: Predecessors: 12; CHECK-NEXT: SU(6): Data Latency=0 Reg=%4 13; CHECK-NEXT: SU(7): Out Latency=0 14; CHECK-NEXT: SU(5): Out Latency=0 15; CHECK-NEXT: SU(3): Data Latency=4 Reg=%3 16define void @misched_bug() nounwind { 17entry: 18 %v0 = load i8, ptr @sc, align 1 19 %v1 = zext i8 %v0 to i32 20 %v2 = load i8, ptr @uc, align 1 21 %v3 = zext i8 %v2 to i32 22 %v4 = trunc i32 %v3 to i8 23 %v5 = trunc i32 %v1 to i8 24 %pair74 = cmpxchg ptr @sc, i8 %v4, i8 %v5 monotonic monotonic 25 %v6 = extractvalue { i8, i1 } %pair74, 0 26 %v7 = icmp eq i8 %v6, %v4 27 %v8 = zext i1 %v7 to i8 28 %v9 = zext i8 %v8 to i32 29 store i32 %v9, ptr @ui, align 4 30 br label %return 31 32return: ; preds = %ventry 33 ret void 34} 35 36