* [Bug target/60607] -march=native command line option handling breaks LTO option machinery
2014-03-21 8:43 [Bug lto/60607] New: Missing lto command line option handling causes build failures trippels at gcc dot gnu.org
@ 2014-03-21 10:12 ` rguenth at gcc dot gnu.org
2014-03-22 8:12 ` trippels at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-03-21 10:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Keywords| |lto
Last reconfirmed| |2014-03-21
Component|lto |target
Ever confirmed|0 |1
Summary|Missing lto command line |-march=native command line
|option handling causes |option handling breaks LTO
|build failures |option machinery
Severity|enhancement |normal
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is that -march=native "explodes" to explicit set options, including
negative ones such as -mno-sse4.1. That's bad, as we now have conflicting
options for bar.o and foo.o which we merge like
/* Do what the old LTO code did - collect exactly one option
setting per OPT code, we pick the first we encounter.
??? This doesn't make too much sense, but when it doesn't
then we should complain. */
I think this option exploding done by -march=native is simply broken.
At least exploding to full positive _and_ negative lists is. Either we
have a separate option for each target feature - then we don't need the
-mno-xxx stuff, or we don't - then we need to fix that.
Note that the plan for the future is to no longer "merge" any target options
for link-time but use target attributes more aggressively. The current code
merely tries to make the link-step succeed somehow, not follow what the
user intended with setting specific target options on specific TUs.
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug target/60607] -march=native command line option handling breaks LTO option machinery
2014-03-21 8:43 [Bug lto/60607] New: Missing lto command line option handling causes build failures trippels at gcc dot gnu.org
2014-03-21 10:12 ` [Bug target/60607] -march=native command line option handling breaks LTO option machinery rguenth at gcc dot gnu.org
@ 2014-03-22 8:12 ` trippels at gcc dot gnu.org
2014-04-23 5:55 ` trippels at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: trippels at gcc dot gnu.org @ 2014-03-22 8:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Variation of the problem without -march=native:
markus@x4 tmp % cat foo.ii
markus@x4 tmp % cat bar.ii
typedef int __m128i __attribute__ ((__vector_size__ (16)));
__m128i a, b, c;
void dequant_scaling () { c = __builtin_ia32_pmulld128 (a, b); }
markus@x4 tmp % cat main.ii
void dequant_scaling();
int main ()
{
dequant_scaling();
}
markus@x4 tmp % g++ -flto -fPIC -march=amdfam10 -O2 -c foo.ii
markus@x4 tmp % g++ -flto -fPIC -march=amdfam10 -O2 -msse4.1 -c bar.ii
markus@x4 tmp % g++ -flto -march=native -O2 -shared foo.o bar.o
markus@x4 tmp % ar cr test.a foo.o bar.o
markus@x4 tmp % g++ -march=amdfam10 -O2 main.ii test.a
bar.ii: In function ‘dequant_scaling’:
bar.ii:3:61: error: ‘__builtin_ia32_pmulld128’ needs isa option -m32 -msse4.1
void dequant_scaling () { c = __builtin_ia32_pmulld128 (a, b); }
^
lto-wrapper: /usr/x86_64-pc-linux-gnu/gcc-bin/4.9.0/g++ returned 1 exit status
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.0/../../../../x86_64-pc-linux-gnu/bin/ld:
fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-447155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 22 10:57:55 2014
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From: "mikpelinux at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/60429] [4.7 Regression] Miscompilation (aliasing) with -finline-functions
Date: Sat, 22 Mar 2014 10:57:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`429
Mikael Pettersson <mikpelinux at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikpelinux at gmail dot com
--- Comment #29 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Richard, your 4.8 backport performs the same call twice in a row on lines 3017
and 3018 in tree-ssa-structalias.c; is that really intentional?
+ /* We have to include all fields that overlap the current
+ field shifted by rhsoffset. And we include at least
+ the last or the first field of the variable to represent
+ reachability of off-bound addresses, in particular &object + 1,
+ conservatively correct. */
+ temp = first_or_preceding_vi_for_offset (curr, offset);
+ temp = first_or_preceding_vi_for_offset (curr, offset);
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug target/60607] -march=native command line option handling breaks LTO option machinery
2014-03-21 8:43 [Bug lto/60607] New: Missing lto command line option handling causes build failures trippels at gcc dot gnu.org
2014-03-21 10:12 ` [Bug target/60607] -march=native command line option handling breaks LTO option machinery rguenth at gcc dot gnu.org
2014-03-22 8:12 ` trippels at gcc dot gnu.org
@ 2014-04-23 5:55 ` trippels at gcc dot gnu.org
2014-04-30 10:18 ` trippels at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: trippels at gcc dot gnu.org @ 2014-04-23 5:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|4.9.0 |4.9.1
Target Milestone|--- |4.9.1
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug target/60607] -march=native command line option handling breaks LTO option machinery
2014-03-21 8:43 [Bug lto/60607] New: Missing lto command line option handling causes build failures trippels at gcc dot gnu.org
` (2 preceding siblings ...)
2014-04-23 5:55 ` trippels at gcc dot gnu.org
@ 2014-04-30 10:18 ` trippels at gcc dot gnu.org
2014-07-16 13:26 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: trippels at gcc dot gnu.org @ 2014-04-30 10:18 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |steffen at hauihau dot de
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 60964 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug target/60607] -march=native command line option handling breaks LTO option machinery
2014-03-21 8:43 [Bug lto/60607] New: Missing lto command line option handling causes build failures trippels at gcc dot gnu.org
` (3 preceding siblings ...)
2014-04-30 10:18 ` trippels at gcc dot gnu.org
@ 2014-07-16 13:26 ` jakub at gcc dot gnu.org
2014-10-30 10:37 ` jakub at gcc dot gnu.org
2015-02-07 10:42 ` trippels at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2014-07-16 13:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.9.1 |4.9.2
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.9.1 has been released.
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug target/60607] -march=native command line option handling breaks LTO option machinery
2014-03-21 8:43 [Bug lto/60607] New: Missing lto command line option handling causes build failures trippels at gcc dot gnu.org
` (4 preceding siblings ...)
2014-07-16 13:26 ` jakub at gcc dot gnu.org
@ 2014-10-30 10:37 ` jakub at gcc dot gnu.org
2015-02-07 10:42 ` trippels at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2014-10-30 10:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.9.2 |4.9.3
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.9.2 has been released.
^ permalink raw reply [flat|nested] 8+ messages in thread* [Bug target/60607] -march=native command line option handling breaks LTO option machinery
2014-03-21 8:43 [Bug lto/60607] New: Missing lto command line option handling causes build failures trippels at gcc dot gnu.org
` (5 preceding siblings ...)
2014-10-30 10:37 ` jakub at gcc dot gnu.org
@ 2015-02-07 10:42 ` trippels at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-02-07 10:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60607
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|4.9.3 |5.0
--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Both issues are fixed on trunk. Closing.
^ permalink raw reply [flat|nested] 8+ messages in thread