https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108461
Bug ID: 108461 Summary: '-fcompare-debug' failure (length) w/ -mcpu=e500mc -O2 -ftrapv -fno-expensive-optimizations -fno-guess-branch-probability -fno-tree-dce -fno-tree-dse Product: gcc Version: 13.0 Status: UNCONFIRMED Keywords: compare-debug-failure Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: asolokha at gmx dot com Target Milestone: --- Target: powerpc-e300c3-linux-gnu Created attachment 54303 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54303&action=edit gkd diff w/ -m32 gcc 13.0.0 20230115 snapshot (g:05cd79c2420d3fe6d84bad694d9808982112b0f0) fails -fcompare-debug check when compiling the following testcase w/ -mcpu=e500mc -O2 -fcompare-debug -ftrapv -fno-expensive-optimizations -fno-guess-branch-probability -fno-tree-dce -fno-tree-dse: char m; void bar (int y) { int a = 1; a = 0x3e10 < y + a + 0x3e00; } void foo (char x) { for (x = 0; x < 3; ++x) { if (m) bar (m); m = x; } } % powerpc-e300c3-linux-gnu-gcc-13 -m32 -mcpu=e500mc -O2 -fcompare-debug -ftrapv -fno-expensive-optimizations -fno-guess-branch-probability -fno-tree-dce -fno-tree-dse -c oxbijmxo.c powerpc-e300c3-linux-gnu-gcc-13: error: oxbijmxo.c: '-fcompare-debug' failure (length) gkd diff attached.