https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90576
Bug ID: 90576
Summary: [10 regression] SPEC CPU2006 450.soplex miscompiled
with -Os -flto after r271413
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: mkuvyrkov at gcc dot gnu.org
Target Milestone: ---
After
===
commit ce7b4f267706c23405705d848c1dcf686496f262
Author: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon May 20 12:01:40 2019 +0000
* tree-ssa-alias.c (compare_sizes): New function.
(sompare_type_sizes): New function
(aliasing_component_refs_p): Use it.
(indirect_ref_may_alias_decl_p): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@271413
138bc75d-0d04-0410-961f-82ee72b054a4
===
GCC miscompiles 450.soplex with -Os -flto at least on AArch64 and AArch32. The
benchmark finishes within seconds with
===
450.soplex: copy 0 non-zero return code (exit code=11, signal=0)
===
FWIW, "-Os -fno-lto" seem to work.
Considering that both AArch64 and AArch32 are affected and the nature of the
patch, this is likely affects other architectures.
Honza, would you please investigate? Please let me know if it doesn't readily
reproduce for you, and I'll help with a testcase.
