[Bug tree-optimization/41835] New: ICE with -flto -O3 (BB N can not throw but has an EH edge)

[Bug tree-optimization/41835] New: ICE with -flto -O3 (BB N can not throw but has an EH edge)

[pinskia at gcc dot gnu dot org]

Looks like something is not removing the EH edges.
Anyways here is a simple testcase:
file 1):
void Stop_Profile( void );
struct CProfileSample { 
  ~CProfileSample( void )  { 
  Stop_Profile(); 
 }
};
void integrateVelocities(int);
void predictUnconstraintMotion(int size)
{
  CProfileSample __profile;
  for ( int i=0;i<size;i++) 
    integrateVelocities(1);
}

--- CUT ---
File 2:
void integrateVelocities(int) { }
void Stop_Profile( void ) {  }

--- CUT ---


-- 
           Summary: ICE with -flto -O3 (BB N can not throw but has an EH
                    edge)
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41835

[Bug tree-optimization/41835] ICE with -flto -O3 (BB N can not throw but has an EH edge)

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-10-26 20:56 -------
Confirmed.  There is a crude fixup pass, but this should be handled by
IPA nothrow (which doesn't exist).


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |lto
   Last reconfirmed|0000-00-00 00:00:00         |2009-10-26 20:56:03
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41835

[Bug tree-optimization/41835] ICE with -flto -O3 (BB N can not throw but has an EH edge)

[hubicka at gcc dot gnu dot org]

------- Comment #2 from hubicka at gcc dot gnu dot org  2009-12-11 11:37 -------
ipa nothrow is hidden in ipa-pure-const (that should be renamed eventually).
However issue here is that at IPA stage we should not touch function bodies, so
we should not do these updates.  This is why fixup pass exists to resolve these
cases after we get into local compilation.

This however seems like LTO is getting something wrong, we do make throw flags
to disappear at IPA for quite some time.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41835

[Bug tree-optimization/41835] ICE with -flto -O3 (BB N can not throw but has an EH edge)

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2010-04-23 15:38 -------
Seems to work for me, even with the 4.5.0 release.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41835

[Bug tree-optimization/41835] ICE with -flto -O3 (BB N can not throw but has an EH edge)

[hubicka at ucw dot cz]

------- Comment #4 from hubicka at ucw dot cz  2010-04-25 23:44 -------
Subject: Re:  ICE with -flto -O3 (BB N can not
        throw but has an EH edge)

> Seems to work for me, even with the 4.5.0 release.
Note that on mainline the code removing wpa fixup should help here too.  There
clearly was bugs.

Honza


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41835