[Bug rtl-optimization/21299] New: internal error on invalid asm statement (3.2, 3.3, 3.4, 4.0)

["mikulas at artax dot karlin dot mff dot cuni dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

The following incorrect code compiled with -O, -O2 or -O3 generates an internal
error. Bug happens on gcc-3.2.3, gcc-3.3.3, gcc-3.4.3, gcc-4.0.0

void f(unsigned long long a)
{
__asm__ ("nop"::"ad"(a));
}

as.c: In function 'f':
as.c:4: error: unrecognizable insn:
(insn:HI 12 7 13 0 (parallel [
            (asm_operands/v ("nop") ("") 0 [
                    (reg/v:DI 0 ax [orig:58 a ] [58])
                ]
                 [
                    (asm_input:DI ("ad"))
                ] ("as.c") 3)
            (clobber (reg:QI 19 dirflag))
            (clobber (reg:QI 18 fpsr))
            (clobber (reg:QI 17 flags))
        ]) -1 (insn_list:REG_DEP_TRUE 6 (nil))
    (nil))
as.c:4: 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.

-- 
           Summary: internal error on invalid asm statement (3.2, 3.3, 3.4,
                    4.0)
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mikulas at artax dot karlin dot mff dot cuni dot cz
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21299