https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69140
Bug ID: 69140
Summary: [5.3 regression] Stack alignment + O1 breaks on x86_64
[introduced by r230176 ]
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: bucaneer at gmail dot com
Target Milestone: ---
Compilation of 64bit Wine with GCC 5.3 fails when using both stack realignment
(-mincoming-stack-boundary=3) and optimization (-O1 or higher):
---
../../../wine/dlls/advapi32/crypt_md4.c:134:1: internal compiler error: in
choose_baseaddr, at config/i386/i386.c:10412
---
which refers to this assert in choose_baseaddr:
---
gcc_assert (base_reg != NULL);
---
This worked fine in some pre-5.3 dev builds (as confirmed when testing bug
66697 fix). git bisect identifies r230176 as the cause of the regression:
---
commit 6ca53fc513f4efdca56af52439ffc5a49b9e6e21
Author: ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed Nov 11 14:56:17 2015 +0000
PR target/67265
* ira.c (ira_setup_eliminable_regset): Do not necessarily create the
frame pointer for stack checking if non-call exceptions aren't used.
* config/i386/i386.c (ix86_finalize_stack_realign_flags): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-5-branch@230176
138bc75d-0d04-0410-961f-82ee72b054a4
---
