[Bug middle-end/45230] New: gcc.c-torture/execute/strncmp-1.c ICEs with -fgraphite-identity

[howarth at nitro dot med dot uc dot edu]

Current gcc trunk with the proposed graphite merge
(http://gcc.gnu.org/ml/gcc-patches/2010-08/msg00080.html) still ICEs the
compiler when the gcc.c-torture/execute/strncmp-1.c testcase is compiled with
-fgraphite-identity. The error appears as...

gcc-4 strncmp-1.c -w -Os -lm -m32 -fgraphite-identity -o strncmp-1.x7
strncmp-1.c: In function ‘main’:
strncmp-1.c:44:1: internal compiler error: in rename_uses, at sese.c:534
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The ICE doesn't backtrace in gdb...

 gdb /sw/lib/gcc4.6/libexec/gcc/x86_64-apple-darwin10.4.0/4.6.0/cc1
GNU gdb 6.3.50-20050815 (Apple version gdb-1469) (Wed May  5 04:36:56 UTC 2010)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared
libraries ............. done

(gdb) r -fpreprocessed strncmp-1.i -fPIC -quiet -dumpbase strncmp-1.c
-mmacosx-version-min=10.6.4 -m32 -mtune=generic -auxbase strncmp-1 -Os -w
-version -fgraphite-identity -o strncmp-1.s
Starting program:
/sw/lib/gcc4.6/libexec/gcc/x86_64-apple-darwin10.4.0/4.6.0/cc1 -fpreprocessed
strncmp-1.i -fPIC -quiet -dumpbase strncmp-1.c -mmacosx-version-min=10.6.4 -m32
-mtune=generic -auxbase strncmp-1 -Os -w -version -fgraphite-identity -o
strncmp-1.s
Reading symbols for shared libraries .++++++++++++..... done
GNU C (GCC) version 4.6.0 20100807 (experimental) (x86_64-apple-darwin10.4.0)
        compiled by GNU C version 4.6.0 20100807 (experimental), GMP version
4.3.2, MPFR version 2.4.2-p3, MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C (GCC) version 4.6.0 20100807 (experimental) (x86_64-apple-darwin10.4.0)
        compiled by GNU C version 4.6.0 20100807 (experimental), GMP version
4.3.2, MPFR version 2.4.2-p3, MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 51323d20c79050973b53377b407f3f68
strncmp-1.c: In function ‘main’:
strncmp-1.c:44:1: internal compiler error: in rename_uses, at sese.c:534
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Program exited with code 04.
(gdb) bt
No stack.

A log stepping from the sese.c:534 breakpoint up to the crash is attached.


-- 
           Summary: gcc.c-torture/execute/strncmp-1.c ICEs with -fgraphite-
                    identity
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: howarth at nitro dot med dot uc dot edu
 GCC build triplet: x86_64-apple-darwin10
  GCC host triplet: x86_64-apple-darwin10
GCC target triplet: x86_64-apple-darwin10


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45230