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* [Bug rtl-optimization/19627] New: if-conversion2 generates wrong code / crash on SH4
@ 2005-01-25 17:15 michael dot schwingen at lancom dot de
  2005-01-25 17:16 ` [Bug rtl-optimization/19627] " michael dot schwingen at lancom dot de
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: michael dot schwingen at lancom dot de @ 2005-01-25 17:15 UTC (permalink / raw)
  To: gcc-bugs

gcc generates wrong code on the test case when called with
/opt/cgcc-3.4.3-20050125/bin/sh-elf-gcc -m4 -S -Os -fomit-frame-pointer test2.c

Adding -fno-if-conversion2 creates working code. It seems that the code that
modifies the stack pointer to make space for function arguments is shifted
across a branch to a point where some paths through the function end up with a
wrong stack pointer at the end.

Attached: test2.c, test2.s, test2.c.27.flow2, test2.c.29.ce3

-- 
           Summary: if-conversion2 generates wrong code / crash on SH4
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: michael dot schwingen at lancom dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: unknown-i686-linux
  GCC host triplet: unknown-i686-linux
GCC target triplet: unknown-sh-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19627


^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2005-07-31  2:35 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-01-25 17:15 [Bug rtl-optimization/19627] New: if-conversion2 generates wrong code / crash on SH4 michael dot schwingen at lancom dot de
2005-01-25 17:16 ` [Bug rtl-optimization/19627] " michael dot schwingen at lancom dot de
2005-01-25 17:17 ` michael dot schwingen at lancom dot de
2005-01-25 17:18 ` michael dot schwingen at lancom dot de
2005-01-25 17:18 ` pinskia at gcc dot gnu dot org
2005-01-25 17:21 ` michael dot schwingen at lancom dot de
2005-02-24 22:40 ` amylaar at gcc dot gnu dot org
2005-02-24 22:51 ` amylaar at gcc dot gnu dot org
2005-02-25  1:05 ` amylaar at gcc dot gnu dot org
2005-07-31  2:38 ` pinskia at gcc dot gnu dot org

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