https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
Hongtao.liu changed:
What|Removed |Added
CC||crazylht at gmail dot com
--- Comment #9
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
Andrew Pinski changed:
What|Removed |Added
Keywords||missed-optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
Oleg Endo olegendo at gcc dot gnu.org changed:
What|Removed |Added
CC||olegendo at gcc
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
--- Comment #6 from wmi at google dot com ---
Created attachment 32328
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=32328action=edit
2.c
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
--- Comment #7 from wmi at google dot com ---
After looking into the problem more, I found IVOPT may not be the root cause.
Even if IVOPT create a memory operand using two registers, if only the
following optimizations doesn't propagate the memory
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
--- Comment #5 from rguenther at suse dot de rguenther at suse dot de ---
On Fri, 14 Feb 2014, wmi at google dot com wrote:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
Bug ID: 60206
Summary: IVOPT has no idea of
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
--- Comment #1 from Andrew Pinski pinskia at gcc dot gnu.org ---
I think the real issue __FP_FRAC_SUB_4 needs to be fixed not to use inline-asm
but normal C code. The normal C code should be able to produce as good as the
inline-asm code now too.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
--- Comment #2 from wmi at google dot com ---
This is a way to fix the problem. libgcc/soft-fp/op-4.h has provided a C
version of __FP_FRAC_SUB_4, but now it is overrided by the inline asm version
in config/i386/32/sfp-machine.h.
But the inline
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
--- Comment #3 from joseph at codesourcery dot com joseph at codesourcery dot
com ---
On Fri, 14 Feb 2014, pinskia at gcc dot gnu.org wrote:
I think the real issue __FP_FRAC_SUB_4 needs to be fixed not to use inline-asm
but normal C code. The
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60206
--- Comment #4 from wmi at google dot com ---
On Fri, 14 Feb 2014, pinskia at gcc dot gnu.org wrote:
I think the real issue __FP_FRAC_SUB_4 needs to be fixed not to use
inline-asm
but normal C code. The normal C code should be able to
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