re PR middle-end/17767 (MMX intrinsics cause internal compiler error)

	PR middle-end/17767
	* cse.c (fold_rtx) [RTX_COMPARE, RTX_COMM_COMPARE]: Don't attempt
	any simplifications of vector mode comparison operators.
	* simplify-rtx.c (simplify_relational_operation): Fix variable name.

testsuite:

	* gcc.dg/i386-mmx-6.c: New test case.

From-SVN: r92896

gcc/ChangeLog

+2005-01-04  Uros Bizjak  <uros@kss-loka.si>
+
+	PR middle-end/17767
+	* cse.c (fold_rtx) [RTX_COMPARE, RTX_COMM_COMPARE]: Don't attempt
+	any simplifications of vector mode comparison operators.
+	* simplify-rtx.c (simplify_relational_operation): Fix variable name.
+
 2005-01-04  Paolo Bonzini  <bonzini@gnu.org>
 	    Devang Patel  <dpatel@apple.com>
 
 	PR tree-optimization/18308
-
 	* tree-if-conv.c (add_to_dst_predicate_list): Gimplify
 	the operands before creating a new expression.
 	* dojump.c (do_jump): Make drop_through_label available

gcc/cse.c

@@ -3865,6 +3865,10 @@ fold_rtx (rtx x, rtx insn)
 	 constant, set CONST_ARG0 and CONST_ARG1 appropriately.  We needn't
 	 do anything if both operands are already known to be constant.  */
 
+      /* ??? Vector mode comparisons are not supported yet.  */
+      if (VECTOR_MODE_P (mode))
+	break;
+
       if (const_arg0 == 0 || const_arg1 == 0)
 	{
 	  struct table_elt *p0, *p1;

gcc/simplify-rtx.c

@@ -2757,7 +2757,7 @@ simplify_relational_operation (enum rtx_code code, enum machine_mode mode,
 #ifdef VECTOR_STORE_FLAG_VALUE
 	  {
 	    int i, units;
-	    rtvec c;
+	    rtvec v;
 
 	    rtx val = VECTOR_STORE_FLAG_VALUE (mode);
 	    if (val == NULL_RTX)

gcc/testsuite/ChangeLog

+2005-01-04  Uros Bizjak  <uros@kss-loka.si>
+
+	PR middle-end/17767
+	* gcc.dg/i386-mmx-6.c: New test case.
+
 2005-01-04  Paolo Bonzini  <bonzini@gnu.org>
 
 	PR tree-optimization/18308

gcc/testsuite/gcc.dg/i386-mmx-6.c

+/* PR middle-end/17767 */
+/* Contributed by Volker Reichelt <reichelt@igpm.rwth-aachen.de> */
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O -mmmx" } */
+typedef int __m64 __attribute__ ((vector_size (8)));
+typedef short __v4hi __attribute__ ((vector_size (8)));
+
+__m64 foo ()
+{
+  int i;
+  __m64 m;
+
+  for (i = 0; i < 2; i++)
+    m = (__m64) __builtin_ia32_pcmpeqw ((__v4hi) m, (__v4hi) m);
+
+  return m;
+}