[Bug rtl-optimization/20097] New: [4.0 regression] ICE in reload_cse_simplify_operands

["schwab at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

$ gcc/xgcc -v -B gcc -O2 -S md.i 
Reading specs from gcc/specs
Target: ia64-suse-linux
Configured with: ../configure --host=ia64-suse-linux --enable-shared --enable-threads --enable-__cxa_atexit --with-system-zlib --with-system-libunwind
Thread model: posix
gcc version 4.0.0 20050219 (experimental)
 gcc/cc1 -fpreprocessed md.i -quiet -dumpbase md.i -auxbase md -O2 -version -o md.s
GNU C version 4.0.0 20050219 (experimental) (ia64-suse-linux)
        compiled by GNU C version 4.0.0 20050219 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
md.i: In function â??do_mdâ??:
md.i:3741: error: insn does not satisfy its constraints:
(insn 5989 5988 5990 236 (set (reg:SI 262 p6)
        (reg:SI 17 r17)) 4 {*movsi_internal} (nil)
    (nil))
md.i:3741: internal compiler error: in reload_cse_simplify_operands, at postreload.c:391
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


Broken by this change:

2005-02-06  Roger Sayle  <roger@eyesopen.com>
	    Andrew Pinski  <pinskia@physics.uc.edu>
	    Paolo Bonzini  <paolo.bonzini@lu.unisi.ch>

	* simplify-rtx.c (simplify_relational_operation_1): Simplify
	(ne:SI (zero_extract:SI FOO (const_int 1) BAR) (const_int 0))
	into just (zero_extract:SI FOO (const_int 1) BAR).

-- 
           Summary: [4.0 regression] ICE in reload_cse_simplify_operands
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schwab at suse dot de
                CC: gcc-bugs at gcc dot gnu dot org,paolo dot bonzini at lu
                    dot unisi dot ch,pinskia at physics dot uc dot edu,roger
                    at eyesopen dot com
GCC target triplet: ia64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20097