re PR target/87573 (error: could not split insn since r264877)

	PR target/87573
	* config/i386/mmx.md (const_vector 0 -> mem splitter): New splitter.

testsuite/ChangeLog:

	PR target/87573
	* gcc.target/i386/pr87573.c: New test.

From-SVN: r265019

gcc/ChangeLog

+2018-10-10  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/87573
+	* config/i386/mmx.md (const_vector 0 -> mem splitter): New splitter.
+
 2018-10-10  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/87550

gcc/config/i386/mmx.md

@@ -217,7 +217,14 @@
 
 (define_split
   [(set (match_operand:MMXMODE 0 "nonimmediate_gr_operand")
-        (match_operand:MMXMODE 1 "general_gr_operand"))]
+        (match_operand:MMXMODE 1 "nonimmediate_gr_operand"))]
+  "!TARGET_64BIT && reload_completed"
+  [(const_int 0)]
+  "ix86_split_long_move (operands); DONE;")
+
+(define_split
+  [(set (match_operand:MMXMODE 0 "nonimmediate_gr_operand")
+        (match_operand:MMXMODE 1 "const0_operand"))]
   "!TARGET_64BIT && reload_completed"
   [(const_int 0)]
   "ix86_split_long_move (operands); DONE;")

gcc/testsuite/ChangeLog

+2018-10-10  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/87573
+	* gcc.target/i386/pr87573.c: New test.
+
 2018-10-10  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/87550

gcc/testsuite/gcc.target/i386/pr87573.c

+/* PR target/87573 */
+/* { dg-do compile { target ia32 } } */
+/* { dg-options "-O1 -mmmx -mno-sse" } */
+
+typedef char __v8qi __attribute__((vector_size(8)));
+
+__v8qi e;
+
+void f (void)
+{
+  e = (__v8qi) {0, 0, 0, 0, 0, 0, 0, 0};
+}