https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100382
Bug ID: 100382 Summary: [12 Regression] go.test/test/fixedbugs/issue16095.go hang since r12-248 Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: jakub at gcc dot gnu.org Target Milestone: --- Since r12-248-gb58dc0b803057c0e6032e0d9bd92cd834f72c75c the go.test/test/fixedbugs/issue16095.go test hangs. To reproduce e.g.: ../configure --enable-languages=c,c++,go --disable-bootstrap make -j32 cd gcc make -j32 check-go The first difference (good to bad) is in the dse2 dump: @@ -889,7 +889,6 @@ void main.main () uint8[20] * _69; uint32 _72; uint64 GOTMP.131_73; - int _74; bool GOTMP.132_75; bool GOTMP.132_77; int GOTMP.16_155; @@ -1190,7 +1189,6 @@ void main.main () goto <bb 52>; [100.00%] <bb 54> [count: 0]: - _74 = MEM[(int *)0B]; goto <bb 54>; [100.00%] <bb 55> [count: 0]: @@ -1217,7 +1215,7 @@ void main.main () goto <bb 68>; [100.00%] <bb 59> [count: 0]: - # x_76 = PHI <x_78(D)(36), _61(37), _61(41), _61(44), _61(45), _61(46), _61(47), _61(48), _61(53), _61(54)> + # x_76 = PHI <x_78(D)(36), _61(37), _61(41), _61(44), _61(45), _61(46), _61(47), _61(48), _61(53)> <L28>: # DEBUG x => x_76 runtime.checkdefer (&GOTMP.15);