re PR target/48678 (unable to find a register to spill in class ‘GENERAL_REGS’)

	PR target/48678
	* config/i386/i386.md (movstrict<mode>): FAIL if operands[0]
	is a SUBREG with non-MODE_INT mode inside of it.

	* gcc.target/i386/pr48678.c: New test.

From-SVN: r172721

gcc/ChangeLog

+2011-04-19  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/48678
+	* config/i386/i386.md (movstrict<mode>): FAIL if operands[0]
+	is a SUBREG with non-MODE_INT mode inside of it.
+
 2011-04-19  Martin Jambor  <mjambor@suse.cz>
 
 	* ipa-cp.c (ipcp_process_devirtualization_opportunities): Devirtualize

gcc/config/i386/i386.md

@@ -2425,6 +2425,9 @@
 {
   if (TARGET_PARTIAL_REG_STALL && optimize_function_for_speed_p (cfun))
     FAIL;
+  if (GET_CODE (operands[0]) == SUBREG
+      && GET_MODE_CLASS (GET_MODE (SUBREG_REG (operands[0]))) != MODE_INT)
+    FAIL;
   /* Don't generate memory->memory moves, go through a register */
   if (MEM_P (operands[0]) && MEM_P (operands[1]))
     operands[1] = force_reg (<MODE>mode, operands[1]);

gcc/testsuite/ChangeLog

+2011-04-19  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/48678
+	* gcc.target/i386/pr48678.c: New test.
+
 2011-04-19  Martin Jambor  <mjambor@suse.cz>
 
 	* g++.dg/opt/devirt1.C: Bump to -O2, remove XFAIL.

gcc/testsuite/gcc.target/i386/pr48678.c

+/* PR target/48678 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse2" } */
+
+#include <emmintrin.h>
+
+typedef short T __attribute__((may_alias));
+struct S { __m128i d; };
+
+__m128i
+foo (short *x, struct S *y, __m128i *z)
+{
+  struct S s = *y;
+  ((T *) &s.d)[0] = *x;
+  return _mm_cmpeq_epi16 (s.d, *z);
+}