[Bug middle-end/37414] [4.4 regression] ICE with -ffast-math

[Bug middle-end/37414] [4.4 regression] ICE with -ffast-math

[reichelt at gcc dot gnu dot org]

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reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37414

[Bug middle-end/37414] New: [4.4 regression] ICE with -ffast-math

[reichelt at gcc dot gnu dot org]

The following code snippet triggers an ICE on mainline (i686-pc-linux-gnu)#
when compiled with "-ffast-math":

=======================================
double foo(double x) { return x; }
double y = 2*foo(1);
=======================================

bug0.cc:2: internal compiler error: Segmentation fault
Please submit a full bug report, [etc.]

The bug was introduced between 2008-08-23 and 2008-08-29.


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           Summary: [4.4 regression] ICE with -ffast-math
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, monitored
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37414

[Bug middle-end/37414] [4.4 regression] ICE with -ffast-math

[ubizjak at gmail dot com]

------- Comment #1 from ubizjak at gmail dot com  2008-09-08 06:50 -------
Confirmed:

Program received signal SIGSEGV, Segmentation fault.
0x082ac655 in optimize_function_for_speed_p (fun=0x0) at
../../gcc-svn/trunk/gcc/predict.c:205
/home/uros/gcc-svn/trunk/gcc/predict.c:205:6178:beg:0x82ac655
(gdb) bt
#0  0x082ac655 in optimize_function_for_speed_p (fun=0x0) at
../../gcc-svn/trunk/gcc/predict.c:205
#1  0x081f3c53 in fold_binary (code=MULT_EXPR, type=0xb7c4e478, op0=0xb7f56294,
op1=0xb7cd39bc) at ../../gcc-svn/trunk/gcc/fold-const.c:10414


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ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-09-08 06:50:37
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37414

[Bug middle-end/37414] [4.4 regression] ICE with -ffast-math

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2008-09-08 21:32 -------
Fixed.


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jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37414

[Bug middle-end/37414] [4.4 regression] ICE with -ffast-math

[jakub at gcc dot gnu dot org]

------- Comment #2 from jakub at gcc dot gnu dot org  2008-09-08 21:31 -------
Subject: Bug 37414

Author: jakub
Date: Mon Sep  8 21:30:23 2008
New Revision: 140122

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140122
Log:
        PR middle-end/37414
        * predict.c (optimize_function_for_size_p): Don't segfault if
        FUN is NULL.
        * fold-const.c (LOGICAL_OP_NON_SHORT_CIRCUIT, fold_truthop,
        tree_swap_operands_p): Don't test cfun != NULL before calling
        optimize_function_for_s*_p.

        * g++.dg/opt/init2.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/opt/init2.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/predict.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37414