[Bug c/17241] New: sh4 application SIGSEGV's with gcc-3.3.4 -O2

[Bug c/17241] New: sh4 application SIGSEGV's with gcc-3.3.4 -O2

[gp at qnx dot com]

A test case (src from libmad) SIGSEGV's when compiled with -O2.  It runs with -
O0.  It has the same behavior with gcc-3.3.1, gcc-3.3.3, and gcc-3.3.4 
targetting sh-unknown-nto-qnx6.3.0.  It looks like an sh optimization issue, 
and not qnx specific.

Command line (generates no errors or warnings):
sh-unknown-nto-qnx-6.3.0-gcc-3.3.4 bug.c -obug -ml -O2

The pre-processed source is large, as any changes I made to the original 
source made the SIGSEGV stop happening.

gdb output:
Program received signal SIGSEGV, Segmentation fault.
0x080409e4 in dct32 (in=0x8e4, slot=0, lo=0x803da64, hi=0xfffffff4) 
at /tmp/gccbug/bug.c:167
167       t86  = t65 + t66;  t109 = MUL(t65 - t66, costab20);
(gdb) bt
#0  0x080409e4 in dct32 (in=0x8e4, slot=0, lo=0x803da64, hi=0xfffffff4) 
at /tmp/
gccbug/bug.c:167
#1  0x080411b4 in main (argc=2276, argv=0x0) at /tmp/gccbug/bug.c:427
(gdb)

-- 
           Summary: sh4 application SIGSEGV's with gcc-3.3.4 -O2
           Product: gcc
           Version: 3.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gp at qnx dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i386-pc-nto-qnx6.3.0
  GCC host triplet: i386-pc-nto-qnx6.3.0
GCC target triplet: sh-unknown-nto-qnx6.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |rtl-optimization
           Keywords|                            |wrong-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[gp at qnx dot com]

------- Additional Comments From gp at qnx dot com  2004-08-30 19:07 -------
Subject: RE:  sh4 application SIGSEGV's with g
	cc-3.3.4 -O2

I have been unable to attach my test case to this report.  I mailed
gcc-bugs.  May I send the file to you?  Perhaps you will have more success.

Thanks.
GP

-----Original Message-----
From: pinskia at gcc dot gnu dot org [mailto:gcc-bugzilla@gcc.gnu.org] 
Sent: August 30, 2004 2:34 PM
To: gp@qnx.com
Subject: [Bug rtl-optimization/17241] sh4 application SIGSEGV's with
gcc-3.3.4 -O2



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |rtl-optimization
           Keywords|                            |wrong-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

------- You are receiving this mail because: -------
You reported the bug, or are watching the reporter.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[gp at qnx dot com]

------- Additional Comments From gp at qnx dot com  2004-08-30 20:41 -------
Created an attachment (id=7005)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7005&action=view)
preprocessed testcase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[gp at qnx dot com]

------- Additional Comments From gp at qnx dot com  2004-08-30 20:42 -------
Created an attachment (id=7006)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7006&action=view)
assembly of testcase (after -save-temps)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[aheiner at harmanbecker dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aheiner at harmanbecker dot
                   |                            |com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[aheiner at harmanbecker dot com]

------- Additional Comments From aheiner at harmanbecker dot com  2004-09-06 07:47 -------
This error is also inside 3.3.1, but not inside 2.95.3

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |3.3.4
      Known to work|                            |2.95.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241

[Bug rtl-optimization/17241] sh4 application SIGSEGV's with gcc-3.3.4 -O2

[ebotcazou at gcc dot gnu dot org]

------- Comment #5 from ebotcazou at gcc dot gnu dot org  2007-05-17 15:28 -------
3.3.x is not maintained anymore.


-- 

ebotcazou at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ebotcazou at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17241