1; RUN: opt -S -passes=rewrite-statepoints-for-gc < %s | FileCheck %s 2; 3; Regression test: 4; After the rewritable callsite collection if any callsite was found 5; in a block that was reported unreachable by DominanceTree then 6; removeUnreachableBlocks() was called. But it is stronger than 7; DominatorTree::isReachableFromEntry(), i.e. removeUnreachableBlocks 8; can remove some blocks for which isReachableFromEntry() returns true. 9; This resulted in stale pointers to the collected but removed 10; callsites. Such stale pointers caused crash when accessed. 11declare void @f(ptr addrspace(1) %obj) 12 13define void @test(ptr addrspace(1) %arg) gc "statepoint-example" { 14; CHECK-LABEL: test( 15; CHECK-NEXT: @f 16 call void @f(ptr addrspace(1) %arg) #1 17 br i1 true, label %not_zero, label %zero 18 19not_zero: 20 ret void 21 22; This block is reachable but removed by removeUnreachableBlocks() 23zero: 24; CHECK-NOT: @f 25 call void @f(ptr addrspace(1) %arg) #1 26 ret void 27 28unreach: 29 call void @f(ptr addrspace(1) %arg) #1 30 ret void 31} 32 33attributes #1 = { norecurse noimplicitfloat } 34