https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94167
Bug ID: 94167 Summary: pr71109.c -fcompare-debug failures on x86_64 and powerpc64le Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zhroma at gcc dot gnu.org Target Milestone: --- Running gcc -O2 -fcompare-debug gcc/testsuite/gcc.c-torture/compile/pr71109.c fails with recent master on powerpc64le. I also checked that same happens on x86 with recent 9.3.0 and old 5.5.0 ubuntu. On master, first dump file with difference is fixup_cfg3 -- I've compared (on powerpc64le) usual regtest results and '-fcompare-debug' results and there are like ~10 more failures, two of them already reported as PR94166. Certainly, there are actually a lot of cases when -fcompare-debug dumps differs, but .o files have same code, so that can only be catched "manually" (e.g. using RUNTESTFLAGS="--target_board=unix/-fcompare-debug" or bootstrapping --with-build-config=bootstrap-debug-lean). And I'm not sure how much community bothers about fixing issues like this one.