Bug 109689 - build error - sna_render_inline.h:40:26: error: inlining failed in call to always_inline ‘vertex_emit_2s’: target specific option mismatch
Summary: build error - sna_render_inline.h:40:26: error: inlining failed in call to al...
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: git
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Chris Wilson
QA Contact: Intel GFX Bugs mailing list
URL:
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Depends on:
Blocks:
 
Reported: 2019-02-20 12:06 UTC by Fabio Pedretti
Modified: 2019-02-21 23:34 UTC (History)
0 users

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Description Fabio Pedretti 2019-02-20 12:06:30 UTC 
Build failure on i386 on Ubuntu cosmic. Builds fine on amd64 and also on i386 Ubuntu bionic.

Full build log:
https://launchpadlibrarian.net/412075109/buildlog_ubuntu-cosmic-i386.xserver-xorg-video-intel_2%3A2.99.917+git1902201253.33ee0c~oibaf~c_BUILDING.txt.gz

Error:
In file included from ../../../src/sna/gen4_vertex.c:34:
../../../src/sna/gen4_vertex.c: In function ‘emit_vertex’:
../../../src/sna/sna_render_inline.h:40:26: error: inlining failed in call to always_inline ‘vertex_emit_2s’: target specific option mismatch
 static force_inline void vertex_emit_2s(struct sna *sna, int16_t x, int16_t y)
                          ^~~~~~~~~~~~~~
../../../src/sna/gen4_vertex.c:308:25: note: called from here
 #define OUT_VERTEX(x,y) vertex_emit_2s(sna, x,y) /* XXX assert(!too_large(x, y)); */
                         ^~~~~~~~~~~~~~~~~~~~~~~~
../../../src/sna/gen4_vertex.c:360:2: note: in expansion of macro ‘OUT_VERTEX’
  OUT_VERTEX(dstX, dstY);
  ^~~~~~~~~~
make[5]: *** [Makefile:695: gen4_vertex.lo] Error 1
Comment 1 Chris Wilson 2019-02-20 12:08:47 UTC 
Is it not the same old compiler bug for not handling target attributes across translation units?
Comment 2 Fabio Pedretti 2019-02-20 12:33:41 UTC 
Yes, actually it is an old bug, distros added patch to workaroud this:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=909860
https://bugzilla.suse.com/show_bug.cgi?id=1092541
https://src.fedoraproject.org/rpms/xorg-x11-drv-intel/c/f2e86334f3a168b04afddb57d4bc4f630e59a5e9

Can it be addressed in -intel?
Comment 3 Chris Wilson 2019-02-21 23:34:51 UTC 
commit 9e6e003e3468dca674ac848e2669af973da02fd4 (origin/master, origin/HEAD)
Author: Adam Jackson <ajax@redhat.com>
Date:   Tue Mar 6 12:07:46 2018 -0500

    Fix build on i686
    
    Presumably this only matters for i686 because amd64 implies sse2, but:
    
    BUILDSTDERR: In file included from gen4_vertex.c:34:
    BUILDSTDERR: gen4_vertex.c: In function 'emit_vertex':
    BUILDSTDERR: sna_render_inline.h:40:26: error: inlining failed in call to al
ways_inline 'vertex_emit_2s': target specific option mismatch
    BUILDSTDERR:  static force_inline void vertex_emit_2s(struct sna *sna, int16
_t x, int16_t y)
    BUILDSTDERR:                           ^~~~~~~~~~~~~~
    BUILDSTDERR: gen4_vertex.c:308:25: note: called from here
    BUILDSTDERR:  #define OUT_VERTEX(x,y) vertex_emit_2s(sna, x,y) /* XXX assert
(!too_large(x, y)); */
    BUILDSTDERR:                          ^~~~~~~~~~~~~~~~~~~~~~~~
    BUILDSTDERR: gen4_vertex.c:360:2: note: in expansion of macro 'OUT_VERTEX'
    BUILDSTDERR:   OUT_VERTEX(dstX, dstY);
    BUILDSTDERR:   ^~~~~~~~~~
    
    The bug here appears to be that emit_vertex() is declared 'sse2' but
    vertex_emit_2s is merely always_inline. gcc8 decides that since you said
    always_inline you need to have explicitly cloned it for every
    permutation of targets. Merely saying inline seems to do the job of
    cloning vertex_emit_2s as much as necessary.
    
    So to reiterate: if you say always-inline, it won't, but if you just say
    maybe inline, it will. Thanks gcc, that's helpful.

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