re PR libgomp/91530 (Several libgomp.*/scan-* tests FAIL without avx_runtime)

	PR libgomp/91530
	* config/i386/sse.md (vec_shl_<mode>, vec_shr_<mode>): Use
	V_128 iterator instead of VI_128.

	* testsuite/libgomp.c/scan-21.c: New test.
	* testsuite/libgomp.c/scan-22.c: New test.

From-SVN: r274985

libgomp/testsuite/libgomp.c/scan-21.c

@@ -4,9 +4,3 @@
 /* { dg-final { scan-tree-dump-times "vectorized \[2-6] loops" 2 "vect" } } */
 
 #include "scan-13.c"
-/* { dg-require-effective-target size32plus } */
-/* { dg-require-effective-target avx_runtime } */
-/* { dg-additional-options "-O2 -fopenmp -fdump-tree-vect-details -msse2 -mno-sse3" } */
-/* { dg-final { scan-tree-dump-times "vectorized \[2-6] loops" 2 "vect" } } */
-
-#include "scan-13.c"

libgomp/testsuite/libgomp.c/scan-22.c

@@ -4,9 +4,3 @@
 /* { dg-final { scan-tree-dump-times "vectorized \[2-6] loops" 2 "vect" } } */
 
 #include "scan-17.c"
-/* { dg-require-effective-target size32plus } */
-/* { dg-require-effective-target avx_runtime } */
-/* { dg-additional-options "-O2 -fopenmp -fdump-tree-vect-details -msse2 -mno-sse3" } */
-/* { dg-final { scan-tree-dump-times "vectorized \[2-6] loops" 2 "vect" } } */
-
-#include "scan-17.c"