[gcc r12-7841] Fix typo in vec_setv8hi_0.

[hongtao Liu <liuhongt@gcc.gnu.org>]

https://gcc.gnu.org/g:e4352a0fee49441a32d12e8d8b98c425cfed4a86

commit r12-7841-ge4352a0fee49441a32d12e8d8b98c425cfed4a86
Author: liuhongt <hongtao.liu@intel.com>
Date:   Mon Mar 28 11:12:37 2022 +0800

    Fix typo in vec_setv8hi_0.
    
    pinsrw is available for both reg and mem operand under sse2.
    pextrw requires sse4.1 for mem operands.
    
    The patch change attr "isa" for pinsrw mem alternative from sse4_noavx
    to noavx, will enable below optimization.
    
    -        movzwl  (%rdi), %eax
             pxor    %xmm1, %xmm1
    -        pinsrw  $0, %eax, %xmm1
    +        pinsrw  $0, (%rdi), %xmm1
             movdqa  %xmm1, %xmm0
    
    gcc/ChangeLog:
    
            PR target/105066
            * config/i386/sse.md (vec_set<mode>_0): Change attr "isa" of
            alternative 4 from sse4_noavx to noavx.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/i386/pr105066.c: New test.

Diff:
---
 gcc/config/i386/sse.md                   |  4 ++--
 gcc/testsuite/gcc.target/i386/pr105066.c | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 58d2bd972ed..01543afd111 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -10617,9 +10617,9 @@
   [(set (attr "isa")
 	(cond [(eq_attr "alternative" "0,1,2")
 		 (const_string "avx512fp16")
-	       (eq_attr "alternative" "3")
+	       (eq_attr "alternative" "3,4")
 		 (const_string "noavx")
-	       (eq_attr "alternative" "4,5,6")
+	       (eq_attr "alternative" "5,6")
 		 (const_string "sse4_noavx")
 	       (eq_attr "alternative" "7,8,9")
 		 (const_string "avx")
diff --git a/gcc/testsuite/gcc.target/i386/pr105066.c b/gcc/testsuite/gcc.target/i386/pr105066.c
new file mode 100644
index 00000000000..c5c5b9e12de
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr105066.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse2 -mno-sse4.1" } */
+/* { dg-final { scan-assembler-not "movzwl" } } */
+/* { dg-final { scan-assembler {(?n)pinsrw[ \t]+\$0.*\(%} } } */
+
+#include <immintrin.h>
+
+__m128i load16(void *p){
+    return _mm_loadu_si16(p);
+}