[Bug tree-optimization/30667] New: [Regression 4.3] ICE in immed_double_const, at emit-rtl.c:468

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Using gcc version 4.3.0 20070201
and   gcc version 4.3.0 20070130 on i386-pc-linux-gnu
(AMD Athlon(tm) XP 2800+) with the following options causes an ICE:

$ gfortran-4.3 -O2 -ftree-vectorize -march=athlon-xp test.f
test.f: In function 'cblank_cvb':
test.f:6: internal compiler error: in immed_double_const, at emit-rtl.c:468

gcc version 4.1.1 20060724 (prerelease) (4.1.1-3mdk) with
gfortran-4.1.1 -O2 -ftree-vectorize -march=athlon-xp test.f
gives no ICE.

On AMD Athlon(tm) 64 X2 Dual Core Processor 4800+ with today's 4.3 build
(gcc-Version 4.3.0 20070131 (experimental), x86_64-unknown-linux-gnu) and
gfortran -O3 -ftree-vectorize -march=athlon-xp -m32 xxx.f90
it does not give an ICE either.

Test case:
------------------------------------------
      subroutine cblank_cvb(a,ndim)
      character*(*) a
      character*1 blank
      data blank/' '/
      do 100 i=1,ndim
100   a(i:i)=blank
      end
------------------------------------------

Backtrace:

Breakpoint 1, fancy_abort (file=0x84af1dc
"/home/fxcoudert/gfortran_nightbuild/trunk/gcc/emit-rtl.c", line=468,
    function=0x84af1c9 "immed_double_const") at
/home/fxcoudert/gfortran_nightbuild/trunk/gcc/diagnostic.c:641
641     /home/fxcoudert/gfortran_nightbuild/trunk/gcc/diagnostic.c: No such
file or directory.
        in /home/fxcoudert/gfortran_nightbuild/trunk/gcc/diagnostic.c
(gdb) bt
#0  fancy_abort (file=0x84af1dc
"/home/fxcoudert/gfortran_nightbuild/trunk/gcc/emit-rtl.c", line=468,
    function=0x84af1c9 "immed_double_const") at
/home/fxcoudert/gfortran_nightbuild/trunk/gcc/diagnostic.c:641
#1  0x0811089f in immed_double_const (i0=32, i1=0, mode=TImode) at
/home/fxcoudert/gfortran_nightbuild/trunk/gcc/emit-rtl.c:468
#2  0x000001d4 in ?? ()
#3  0x084af1c9 in __FUNCTION__.27361 ()
#4  0x00000080 in ?? ()
#5  0x00000000 in ?? ()


-- 
           Summary: [Regression 4.3] ICE in immed_double_const, at emit-
                    rtl.c:468
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org
GCC target triplet: i386-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30667