[Bug c/37776] New: ICE compiling Matrix.c in pymol using -fgraphite

["howarth at nitro dot med dot uc dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

When the -fgraphite flag is passed while compiling pymol
(http://pymol.sourceforge.net), an ICE occurs for Matrix.c of the form...

gcc-4 --save-temps -Wall -fgraphite -I../layer0 -I../layer1 -I../layer2
-I../layer3 -I../layer4 -I../layer5  -Wmissing-prototypes -Wno-long-double -O3
-funroll-loops -fomit-frame-pointer -ffast-math  -I/sw/include
-I/sw/include/python2.5 -I/sw/include/python2.5/Numeric -I/usr/X11R6/include
-D_HAVE_LIBPNG  -D_PYMOL_MODULE -D_PYMOL_NUMPY -D_PYMOL_FINK  -I../ov/src   -c
-o Matrix.o Matrix.c
Matrix.c: In function ?pymol_rg_?:
Matrix.c:3059: error: edge from 12 to 539 should be marked irreducible
Matrix.c:3059: error: basic block 539 should be marked irreducible
Matrix.c:3059: internal compiler error: in verify_loop_structure, at
cfgloop.c:1569


-- 
           Summary: ICE compiling Matrix.c in pymol using -fgraphite
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: howarth at nitro dot med dot uc dot edu
 GCC build triplet: i686-apple-darwin9
  GCC host triplet: i686-apple-darwin9
GCC target triplet: i686-apple-darwin9


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37776