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; RUN: opt -S -rewrite-statepoints-for-gc < %s | FileCheck %s
; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s
;
; Regression test:
; After the rewritable callsite collection if any callsite was found
; in a block that was reported unreachable by DominanceTree then
; removeUnreachableBlocks() was called. But it is stronger than
; DominatorTree::isReachableFromEntry(), i.e. removeUnreachableBlocks
; can remove some blocks for which isReachableFromEntry() returns true.
; This resulted in stale pointers to the collected but removed
; callsites. Such stale pointers caused crash when accessed.
declare void @f(i8 addrspace(1)* %obj)
define void @test(i8 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: test(
; CHECK-NEXT: @f
call void @f(i8 addrspace(1)* %arg) #1
br i1 true, label %not_zero, label %zero
not_zero:
ret void
; This block is reachable but removed by removeUnreachableBlocks()
zero:
; CHECK-NOT: @f
call void @f(i8 addrspace(1)* %arg) #1
ret void
unreach:
call void @f(i8 addrspace(1)* %arg) #1
ret void
}
attributes #1 = { norecurse noimplicitfloat }
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