[Bug rtl-optimization/44787] New: [regression]internal compiler error: in reload_cse_simplify_operands, at postreload.c:395

["jingyu at google dot com" <gcc-bugzilla at gcc dot gnu dot org>]

Revision 160947 breaks the following test case.

void joint_decode(float* mlt_buffer1, int t) {
    int i;
    float decode_buffer[1060];
    foo(decode_buffer);
    for (i=0; i<10 ; i++) {
        mlt_buffer1[i] = i * decode_buffer[t];
    }
}

/usr/local/install/R160947/libexec/gcc/arm-linux-androideabi/4.6.0/cc1
-fpreprocessed cook.i -fPIC -quiet -dumpbase cook.i  "-march=armv7-a"
"-mfloat-abi=softfp" "-mfpu=neon" -mthumb -auxbase-strip cook.o -Os  
-fno-strict-aliasing  -o /tmp/ccrdKipa.s 

cook.i: In function 'joint_decode':
cook.i:8:1: error: insn does not satisfy its constraints:
(insn 98 55 59 2 cook.i:6 (set (reg:SI 3 r3)
        (plus:SI (mult:SI (reg/v:SI 5 r5 [orig:183 t ] [183])
                (const_int 4 [0x4]))
            (reg/f:SI 13 sp))) 674 {*thumb2_arith_shiftsi} (nil))
cook.i:8:1: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:395
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

I tried revision 160946 and did not see such error. The bug may not be brought
by r160947, but it was triggered.


-- 
           Summary: [regression]internal compiler error: in
                    reload_cse_simplify_operands, at postreload.c:395
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jingyu at google dot com
 GCC build triplet: x86_64-pc-linux-gnu
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: arm-linux-androideabi,arm-eabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44787