[Bug regression/37456] New: gcc4.4 ICE: verify_flow_info failed

[Bug regression/37456] New: gcc4.4 ICE: verify_flow_info failed

[anton at samba dot org]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 988 bytes --]

I get an ICE on PowerPC with the following code on a gcc svn checkout from this
morning:

gcc version 4.4.0 20080909 (experimental) (GCC) 

# /root/gcc-installed/bin/g++ -O -ffast-math -c foo.cpp

foo.cpp: In member function ‘void testcase::foo::doit(double, double, double)’:
foo.cpp:16: error: control flow in the middle of basic block 3
foo.cpp:16: error: control flow in the middle of basic block 3
foo.cpp:16: error: BB 3 can not throw but has EH edges
foo.cpp:16: internal compiler error: verify_flow_info failed

It compiles OK if the -ffast-math flag is not specified.


-- 
           Summary: gcc4.4 ICE: verify_flow_info failed
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: regression
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: anton at samba dot org
  GCC host triplet: powerpc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug regression/37456] gcc4.4 ICE: verify_flow_info failed

[anton at samba dot org]

------- Comment #1 from anton at samba dot org  2008-09-10 07:35 -------
Created an attachment (id=16280)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16280&action=view)
Testcase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug regression/37456] gcc4.4 ICE: verify_flow_info failed

[amodra at bigpond dot net dot au]

-- 

amodra at bigpond dot net dot au changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
 GCC target triplet|                            |powerpc-linux
   Last reconfirmed|0000-00-00 00:00:00         |2008-09-10 08:14:32
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug regression/37456] [4.4 Regression] ICE: verify_flow_info failed: control flow in the middle of basic block

[tbm at gcc dot gnu dot org]

------- Comment #2 from tbm at gcc dot gnu dot org  2008-09-10 10:26 -------
I get the same on x86_64.


-- 

tbm at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   GCC host triplet|powerpc-linux               |
 GCC target triplet|powerpc-linux               |
            Summary|gcc4.4 ICE: verify_flow_info|[4.4 Regression] ICE:
                   |failed                      |verify_flow_info failed:
                   |                            |control flow in the middle
                   |                            |of basic block


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug middle-end/37456] [4.4 Regression] ICE: verify_flow_info failed: control flow in the middle of basic block

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|regression                  |middle-end
           Keywords|                            |ice-on-valid-code
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug middle-end/37456] [4.4 Regression] ICE: verify_flow_info failed: control flow in the middle of basic block

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2008-09-14 04:50 -------
Here is a reduced testcase without -ffast-math (aka it also applies to integers
:) ):
int zot(int );
struct bar {
~bar() { }
};
int x;
void doit(int a, int b, int c) {
bar pn;
int b1 = zot(a) * c;
int b2 = zot(b) * c;
x = b1 + b2;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug middle-end/37456] [4.4 Regression] ICE: verify_flow_info failed: control flow in the middle of basic block

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2008-09-15 08:31 -------
This is caused by PR15255 fix, undistribute_ops_list -> build_and_add_sum
happily appends new statements after a throwing statement.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug middle-end/37456] [4.4 Regression] ICE: verify_flow_info failed: control flow in the middle of basic block

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2008-09-15 08:38 -------
Mine then.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2008-09-10 08:14:32         |2008-09-15 08:38:13
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug middle-end/37456] [4.4 Regression] ICE: verify_flow_info failed: control flow in the middle of basic block

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2008-09-18 11:28 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456

[Bug middle-end/37456] [4.4 Regression] ICE: verify_flow_info failed: control flow in the middle of basic block

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2008-09-18 11:29 -------
Subject: Bug 37456

Author: rguenth
Date: Thu Sep 18 11:28:18 2008
New Revision: 140449

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140449
Log:
2008-09-18  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/37456
        * tree-ssa-reassoc.c (build_and_add_sum): If the stmt we
        want to insert after ends a BB insert on the single fallthru
        outgoing edge.

        * testsuite/g++.dg/torture/pr37456.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr37456.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37456