This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug rtl-optimization/57281] [4.9 Regression] x86_64-linux loop fails to terminate at -O3 -m32
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 15 May 2013 09:41:17 +0000
- Subject: [Bug rtl-optimization/57281] [4.9 Regression] x86_64-linux loop fails to terminate at -O3 -m32
- Auto-submitted: auto-generated
- References: <bug-57281-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57281
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|target |rtl-optimization
Summary|[4.9 Regression] |[4.9 Regression]
|x86_64-linux loop fails to |x86_64-linux loop fails to
|terminate at -O3 -m32, |terminate at -O3 -m32
|bogus extendsidi2_1 |
|splitter |
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
postreload leaves a REG_DEAD note on the
(insn 19 78 21 4 (parallel [
(set (mem:DI (reg/f:SI 3 bx [orig:68 D.1736 ] [68]) [4 *_18+0 S8
A64])
(sign_extend:DI (reg:SI 0 ax [orig:75 b ] [75])))
(clobber (reg:CC 17 flags))
(clobber (reg:SI 1 dx [80]))
]) t.c:9 137 {extendsidi2_1}
(expr_list:REG_UNUSED (reg:SI 1 dx [80])
(expr_list:REG_DEAD (reg:SI 0 ax [orig:75 b ] [75])
(nil))))
which is bogus.