PATCH: PR target/47364: [x32] internal compiler error: in emit_move_insn, at expr.c:3355

[H.J. Lu]

Hi,

We should only expand strlen to Pmode.  Otherwise, we got

[hjl@gnu-6 ilp32-38]$ cat x.i
char one[50] = "ijk";
int
main (void)
{
  return __builtin_strlen (one) != 3;
}
[hjl@gnu-6 ilp32-38]$ /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc 
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -S -o x.s -mx32 -O2 x.i
x.i: In function ‘main’:
x.i:5:27: internal compiler error: in emit_move_insn, at expr.c:3333
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

OK for trunk?

Thanks.


H.J.
----
2011-07-27  H.J. Lu  <hongjiu...@intel.com>

        PR target/47364
        * config/i386/i386.md (strlen<mode>): Replace SWI48x with P.

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index e91a299..c772f94 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -15824,11 +15855,11 @@
    (set_attr "prefix_rep" "1")])
 
 (define_expand "strlen<mode>"
-  [(set (match_operand:SWI48x 0 "register_operand" "")
-       (unspec:SWI48x [(match_operand:BLK 1 "general_operand" "")
-                       (match_operand:QI 2 "immediate_operand" "")
-                       (match_operand 3 "immediate_operand" "")]
-                      UNSPEC_SCAS))]
+  [(set (match_operand:P 0 "register_operand" "")
+       (unspec:P [(match_operand:BLK 1 "general_operand" "")
+                  (match_operand:QI 2 "immediate_operand" "")
+                  (match_operand 3 "immediate_operand" "")]
+                 UNSPEC_SCAS))]
   ""
 {
  if (ix86_expand_strlen (operands[0], operands[1], operands[2], operands[3]))