[Bug inline-asm/54273] New: [4.7] ICE in extract_constrain_insn_cached with --float=soft, --target=powerpc-unknown-linux-gnu

["simonb at google dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54273

             Bug #: 54273
           Summary: [4.7] ICE in extract_constrain_insn_cached with
                    --float=soft, --target=powerpc-unknown-linux-gnu
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: inline-asm
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: simonb@google.com


gcc.target/powerpc/regnames-1.c fails in gcc-4_7-branch at r190414 with
--target=powerpc-unknown-linux-gnu --float=soft.  I haven't yet checked 4.8.

Repro, using a cross-gcc hosted on x86_64:

  configure \
  --enable-languages=c \
  --build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu \
  --target=powerpc-unknown-linux-gnu \
  --with-float=soft

  make -j6 all-gcc
  make RUNTESTFLAGS='powerpc.exp=regnames-1.c' check-gcc

...
FAIL: gcc.target/powerpc/regnames-1.c (internal compiler error)
...
.../gcc/testsuite/gcc.target/powerpc/regnames-1.c:8:1: error: insn does not
satisfy its constraints:
(insn 20 2 33 (set (mem/c:DF (plus:SI (reg/f:SI 31 %r31)
                (const_int 8 [0x8])) [0 S8 A64])
        (reg/v:DF 49 %f17 [ f17 ]))
.../gcc/testsuite/gcc.target/powerpc/regnames-1.c:7 282 {*movdf_softfloat32}
     (nil))
.../gcc/testsuite/gcc.target/powerpc/regnames-1.c:8:1: internal compiler error:
in extract_constrain_insn_cached, at recog.c:2038