derek.holloway
7502bf64a4
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36 lines
1.0 KiB
LLVM
36 lines
1.0 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin8 -misched-print-dags -o - 2>&1 > /dev/null | FileCheck %s
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; REQUIRES: asserts
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@sc = common global i8 0
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@uc = common global i8 0
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@ui = common global i32 0
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; Regression Test for PR92368.
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;
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; CHECK: SU(8): CMP8rr %4:gr8, %3:gr8, implicit-def $eflags
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; CHECK: Predecessors:
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; CHECK-NEXT: SU(6): Data Latency=0 Reg=%4
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; CHECK-NEXT: SU(7): Out Latency=0
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; CHECK-NEXT: SU(5): Out Latency=0
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; CHECK-NEXT: SU(3): Data Latency=4 Reg=%3
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define void @misched_bug() nounwind {
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entry:
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%v0 = load i8, ptr @sc, align 1
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%v1 = zext i8 %v0 to i32
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%v2 = load i8, ptr @uc, align 1
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%v3 = zext i8 %v2 to i32
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%v4 = trunc i32 %v3 to i8
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%v5 = trunc i32 %v1 to i8
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%pair74 = cmpxchg ptr @sc, i8 %v4, i8 %v5 monotonic monotonic
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%v6 = extractvalue { i8, i1 } %pair74, 0
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%v7 = icmp eq i8 %v6, %v4
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%v8 = zext i1 %v7 to i8
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%v9 = zext i8 %v8 to i32
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store i32 %v9, ptr @ui, align 4
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br label %return
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return: ; preds = %ventry
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ret void
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}
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