[Bug middle-end/33597] Internal compiler error while compiling libswcale from ffmpeg

[irar at il dot ibm dot com]

--- Comment #6 from irar at il dot ibm dot com  2007-09-30 10:37 ---
(In reply to comment #5)
> Patch in testing:

Thanks for fixing this! 
(I've just started to test the exact same patch :))

Ira


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33597

[Bug middle-end/33597] Internal compiler error while compiling libswcale from ffmpeg

[ubizjak at gmail dot com]

--- Comment #5 from ubizjak at gmail dot com  2007-09-30 10:28 ---
Patch in testing:

--cut here--
Index: tree-vect-analyze.c
===
--- tree-vect-analyze.c (revision 128890)
+++ tree-vect-analyze.c (working copy)
@@ -2696,6 +2696,13 @@
  return false;
}
  icode = (int) optab->handlers[(int) vec_mode].insn_code;
+ if (icode == CODE_FOR_nothing)
+   {
+ if (vect_print_dump_info (REPORT_SLP))
+   fprintf (vect_dump,
+"Build SLP failed: op not supported by target.");
+ return false;
+   }
  optab_op2_mode = insn_data[icode].operand[2].mode;
  if (!VECTOR_MODE_P (optab_op2_mode))
{
--cut here--


-- 

ubizjak at gmail dot com changed:

   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |ubizjak at gmail dot com
   |dot org |
 Status|NEW |ASSIGNED
   Last reconfirmed|2007-09-30 10:03:40 |2007-09-30 10:28:58
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33597

[Bug middle-end/33597] Internal compiler error while compiling libswcale from ffmpeg

[ubizjak at gmail dot com]

--- Comment #4 from ubizjak at gmail dot com  2007-09-30 10:03 ---
segfaults with -ftree-vectorize in SLP.

reduced testcase:

--cut here--
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;

void
rgb15to24_C (const uint8_t * src, uint8_t * dst, long src_size)
{
  const uint16_t *end;
  const uint16_t *s = (uint16_t *)src;
  uint8_t *d = (uint8_t *)dst;

  end = s + src_size/2;
  while (s < end)
{
  uint16_t bgr = *s++;

  *d++ = (bgr&0x1F)<<3;
  *d++ = (bgr&0x3E0)>>2;
  *d++ = (bgr&0x7C00)>>7;
}
}
--cut here--

gcc -O2 -ftree-vectorize -msse2:

t.c: In function �rgb15to24_C�:
t.c:6: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See  for instructions.

Program received signal SIGSEGV, Segmentation fault.
0x00a94d24 in vect_build_slp_tree (loop_vinfo=0x1039cc0, 
node=0x7fffb8b97da0, group_size=3, slp_impossible=0x7fffb8b97e3f "", 
inside_cost=0x7fffb8b97e38, outside_cost=0x7fffb8b97e34, 
ncopies_for_cost=3) at ../../gcc-svn/trunk/gcc/tree-vect-analyze.c:2700
2700  if (!VECTOR_MODE_P (optab_op2_mode))


#0  0x00a94d24 in vect_build_slp_tree (loop_vinfo=0x1039cc0, 
node=0x7fffb8b97da0, group_size=3, slp_impossible=0x7fffb8b97e3f "", 
inside_cost=0x7fffb8b97e38, outside_cost=0x7fffb8b97e34, 
ncopies_for_cost=3) at ../../gcc-svn/trunk/gcc/tree-vect-analyze.c:2700
#1  0x00a94f73 in vect_build_slp_tree (loop_vinfo=0x1039cc0, 
node=0x7fffb8b97e28, group_size=3, slp_impossible=0x7fffb8b97e3f "", 
inside_cost=0x7fffb8b97e38, outside_cost=0x7fffb8b97e34, 
ncopies_for_cost=3) at ../../gcc-svn/trunk/gcc/tree-vect-analyze.c:2870
#2  0x00a955e3 in vect_analyze_slp_instance (loop_vinfo=0x1039cc0, 
stmt=)
at ../../gcc-svn/trunk/gcc/tree-vect-analyze.c:3000
#3  0x00a993e0 in vect_analyze_loop (loop=)
at ../../gcc-svn/trunk/gcc/tree-vect-analyze.c:3045
#4  0x007f82ce in vectorize_loops ()
at ../../gcc-svn/trunk/gcc/tree-vectorizer.c:2501

Confirmed on x86_64 and i686/sse2.


-- 

ubizjak at gmail dot com changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2007-09-30 10:03:40
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33597

[Bug middle-end/33597] Internal compiler error while compiling libswcale from ffmpeg

[ismail at pardus dot org dot tr]

--- Comment #3 from ismail at pardus dot org dot tr  2007-09-29 23:03 
---
Created an attachment (id=14270)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14270&action=view)
Corresponding *.i file


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33597

[Bug middle-end/33597] Internal compiler error while compiling libswcale from ffmpeg

[pinskia at gcc dot gnu dot org]

--- Comment #2 from pinskia at gcc dot gnu dot org  2007-09-29 22:59 ---
The .i file is important and not the .s file.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33597