derek.holloway
7502bf64a4
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34 lines
1.0 KiB
LLVM
34 lines
1.0 KiB
LLVM
; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s
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;
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; Regression test:
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; After the rewritable callsite collection if any callsite was found
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; in a block that was reported unreachable by DominanceTree then
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; removeUnreachableBlocks() was called. But it is stronger than
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; DominatorTree::isReachableFromEntry(), i.e. removeUnreachableBlocks
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; can remove some blocks for which isReachableFromEntry() returns true.
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; This resulted in stale pointers to the collected but removed
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; callsites. Such stale pointers caused crash when accessed.
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declare void @f(ptr addrspace(1) %obj)
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define void @test(ptr addrspace(1) %arg) gc "statepoint-example" {
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; CHECK-LABEL: test(
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; CHECK-NEXT: @f
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call void @f(ptr addrspace(1) %arg) #1
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br i1 true, label %not_zero, label %zero
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not_zero:
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ret void
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; This block is reachable but removed by removeUnreachableBlocks()
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zero:
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; CHECK-NOT: @f
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call void @f(ptr addrspace(1) %arg) #1
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ret void
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unreach:
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call void @f(ptr addrspace(1) %arg) #1
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ret void
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}
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attributes #1 = { norecurse noimplicitfloat }
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