derek.holloway
7502bf64a4
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38 lines
960 B
LLVM
38 lines
960 B
LLVM
; RUN: opt -disable-output -passes="loop-mssa(loop-rotate),print<memoryssa>" -verify-memoryssa < %s 2>&1 | FileCheck %s
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; CHECK: entry:
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; CHECK-NEXT: 3 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store ptr null, ptr %p, align 8
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; CHECK-NEXT: MemoryUse(3)
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; CHECK-NEXT: %val11 = load ptr, ptr %p, align 8
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; CHECK: loop.latch:
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; CHECK-NEXT: 5 = MemoryPhi({loop.latch,1},{loop.latch.lr.ph,3})
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; CHECK-NEXT: MemoryUse(5)
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; CHECK-NEXT: %val2 = load ptr, ptr %p, align 8
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; CHECK-NEXT: 1 = MemoryDef(5)
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; CHECK-NEXT: store ptr null, ptr %p, align 8
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; CHECK-NEXT: MemoryUse(1)
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; CHECK-NEXT: %val1 = load ptr, ptr %p, align 8
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; CHECK: exit:
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; CHECK-NEXT: 4 = MemoryPhi({entry,3},{loop.exit_crit_edge,1})
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define void @test(ptr %p) {
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entry:
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br label %loop
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loop:
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store ptr null, ptr %p
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%val1 = load ptr, ptr %p
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%cmp = icmp eq ptr %val1, null
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br i1 %cmp, label %exit, label %loop.latch
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loop.latch:
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%val2 = load ptr, ptr %p
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br label %loop
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exit:
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ret void
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}
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