re PR target/80819 (Useless store to the stack in _mm_set_epi64x with SSE4 -mno-avx)

	PR target/80819
	* config/i386/sse.md (vec_concatv2di): Remove * from (=Yr,0,*rm)
	alternative.

	* gcc.target/i386/pr80819-1.c: New test.
	* gcc.target/i386/pr80819-2.c: New test.

From-SVN: r255226

gcc/ChangeLog

+2017-11-29  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/80819
+	* config/i386/sse.md (vec_concatv2di): Remove * from (=Yr,0,*rm)
+	alternative.
+
 2017-11-28  David Malcolm  <dmalcolm@redhat.com>
 
 	* diagnostic-show-locus.c (layout::print_trailing_fixits): Handle

gcc/config/i386/sse.md

@@ -13919,7 +13919,7 @@
 	  (match_operand:DI 1 "nonimmediate_operand"
 	  "  0, 0,x ,Yv,r ,vm,?!*Yn,0,Yv,0,0,v")
 	  (match_operand:DI 2 "vector_move_operand"
-	  "*rm,rm,rm,rm,C ,C ,C ,x,Yv,x,m,m")))]
+	  " rm,rm,rm,rm,C ,C ,C ,x,Yv,x,m,m")))]
   "TARGET_SSE"
   "@
    pinsrq\t{$1, %2, %0|%0, %2, 1}

gcc/testsuite/ChangeLog

+2017-11-29  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/80819
+	* gcc.target/i386/pr80819-1.c: New test.
+	* gcc.target/i386/pr80819-2.c: New test.
+
 2017-11-28  David Malcolm  <dmalcolm@redhat.com>
 
 	* gcc.dg/plugin/diagnostic-test-show-locus-bw.c

gcc/testsuite/gcc.target/i386/pr80819-1.c

+/* PR target/80819 */
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -msse4 -mno-avx -mtune=haswell -masm=att" } */
+
+typedef unsigned long long V __attribute__((vector_size (16)));
+
+V
+foo (unsigned long long x, unsigned long long y)
+{
+  return (V) { x, y };
+}
+
+/* { dg-final { scan-assembler-not "movq\[ \t]*%rsi, \[-0-9]*\\(" } } */

gcc/testsuite/gcc.target/i386/pr80819-2.c

+/* PR target/80819 */
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -msse4 -mno-avx -mtune=generic -masm=att" } */
+
+typedef unsigned long long V __attribute__((vector_size (16)));
+
+V
+foo (unsigned long long x, unsigned long long y)
+{
+  return (V) { x, y };
+}
+
+/* { dg-final { scan-assembler-not "movq\[ \t]*%rsi, \[-0-9]*\\(" } } */