https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105630
Bug ID: 105630 Summary: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O1 -ftree-parallelize-loops=2 Product: gcc Version: 13.0 Status: UNCONFIRMED Keywords: compare-debug-failure Severity: normal Priority: P3 Component: debug Assignee: unassigned at gcc dot gnu.org Reporter: asolokha at gmx dot com Target Milestone: --- Target: aarch64-linux-gnu gcc 13.0.0 20220515 snapshot (g:18547874ee205d830acb31f1e3c1c89fc7725c14) fails -fcompare-debug check when compiling the following testcase w/ -O1 -ftree-parallelize-loops=2: int m; static int n; void foo (void) { int *arr[] = { &n, &n, &n }; int unused = n; m = 0; } void bar (int *arr, int i) { while (i < 1) arr[i++] = 1; } aarch64-linux-gnu-gcc-13.0.0 -O1 -fcompare-debug -ftree-parallelize-loops=2 -c fjosrfpk.c aarch64-linux-gnu-gcc-13.0.0: error: fjosrfpk.c: '-fcompare-debug' failure --- fjosrfpk.c.gkd +++ fjosrfpk.gk.c.gkd @@ -360,7 +360,7 @@ 1: int i; 2: signed int D.xxxx; -;; Function bar._loopfn.0 (bar._loopfn.0, funcdef_no=2, cgraph_uid=3, symbol_order=5) +;; Function bar._loopfn.0 (bar._loopfn.0, funcdef_no=2, cgraph_uid=3, symbol_order=6) (note # 0 0 NOTE_INSN_DELETED) (note # 0 0 [bb 2] NOTE_INSN_BASIC_BLOCK) It was originally reported in PR105415 comment 8.