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* [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" @ 2021-05-11 16:48 zhendong.su at inf dot ethz.ch 2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: zhendong.su at inf dot ethz.ch @ 2021-05-11 16:48 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539 Bug ID: 100539 Summary: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zhendong.su at inf dot ethz.ch Target Milestone: --- [514] % gcctk -v Using built-in specs. COLLECT_GCC=gcctk COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --disable-bootstrap --prefix=/local/suz-local/software/local/gcc-trunk --enable-languages=c,c++ --disable-werror --enable-multilib --with-system-zlib Thread model: posix Supported LTO compression algorithms: zlib gcc version 12.0.0 20210511 (experimental) [master revision 15e6b45c9ad:45dc47d4720:cf43636a74a028daf2024b33d1915274a2ff9655] (GCC) [515] % [515] % gcctk -Os small.c; ./a.out [516] % [516] % gcctk -Os -fno-dce -fno-inline-small-functions -fno-tree-dce small.c [517] % ./a.out Segmentation fault [518] % [518] % cat small.c int a, b; static void c(int *d) { int e = 0; for (; a < 1; a++) e |= (b == *d); } int main() { int g = 0; c(&g); return 0; } ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/100539] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" 2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch @ 2021-05-12 6:54 ` rguenth at gcc dot gnu.org 2021-05-12 9:35 ` [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 marxin at gcc dot gnu.org 2021-05-12 11:40 ` [Bug ipa/100539] " jamborm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2021-05-12 6:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2021-05-12 Component|tree-optimization |rtl-optimization Target| |x86_64-*-* Keywords| |wrong-code Version|unknown |12.0 Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- cmpl %edx, 0 oops. Confirmed. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch 2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org @ 2021-05-12 9:35 ` marxin at gcc dot gnu.org 2021-05-12 11:40 ` [Bug ipa/100539] " jamborm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: marxin at gcc dot gnu.org @ 2021-05-12 9:35 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539 Martin Liška <marxin at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jamborm at gcc dot gnu.org, | |marxin at gcc dot gnu.org Summary|wrong code at -Os and above |[10/11/12 Regression] wrong |with "-fno-dce |code at -Os and above with |-fno-inline-small-functions |"-fno-dce |-fno-tree-dce" |-fno-inline-small-functions | |-fno-tree-dce" since | |r10-3311-gff6686d2e5f797d6 --- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> --- Started likely with r10-3311-gff6686d2e5f797d6. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug ipa/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch 2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org 2021-05-12 9:35 ` [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 marxin at gcc dot gnu.org @ 2021-05-12 11:40 ` jamborm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: jamborm at gcc dot gnu.org @ 2021-05-12 11:40 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539 Martin Jambor <jamborm at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Component|rtl-optimization |ipa Resolution|--- |DUPLICATE Status|NEW |RESOLVED --- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> --- Perhaps not surprisingly, it's a dup of PR 93385. The posted patches fix this testcase too. *** This bug has been marked as a duplicate of bug 93385 *** ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-05-12 11:40 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch 2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org 2021-05-12 9:35 ` [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 marxin at gcc dot gnu.org 2021-05-12 11:40 ` [Bug ipa/100539] " jamborm at gcc dot gnu.org
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