| ; 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 } |