[gcc r13-3490] Always use TYPE_MODE instead of DECL_MODE for vector field

[H.J. Lu <hjl@gcc.gnu.org>]

https://gcc.gnu.org/g:1c64aba8cdf6509533f554ad86640f274cdbe37f

commit r13-3490-g1c64aba8cdf6509533f554ad86640f274cdbe37f
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Oct 19 12:53:35 2022 -0700

    Always use TYPE_MODE instead of DECL_MODE for vector field
    
    e034c5c8957 re PR target/78643 (ICE in convert_move, at expr.c:230)
    
    fixed the case where DECL_MODE of a vector field is BLKmode and its
    TYPE_MODE is a vector mode because of target attribute.  Remove the
    BLKmode check for the case where DECL_MODE of a vector field is a vector
    mode and its TYPE_MODE isn't a vector mode because of target attribute.
    
    gcc/
    
            PR target/107304
            * expr.cc (get_inner_reference): Always use TYPE_MODE for vector
            field with vector raw mode.
    
    gcc/testsuite/
    
            PR target/107304
            * gcc.target/i386/pr107304.c: New test.

Diff:
---
 gcc/expr.cc                              |  3 +--
 gcc/testsuite/gcc.target/i386/pr107304.c | 39 ++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/gcc/expr.cc b/gcc/expr.cc
index efe387e6173..9145193c2c1 100644
--- a/gcc/expr.cc
+++ b/gcc/expr.cc
@@ -7905,8 +7905,7 @@ get_inner_reference (tree exp, poly_int64_pod *pbitsize,
 	  /* For vector fields re-check the target flags, as DECL_MODE
 	     could have been set with different target flags than
 	     the current function has.  */
-	  if (mode == BLKmode
-	      && VECTOR_TYPE_P (TREE_TYPE (field))
+	  if (VECTOR_TYPE_P (TREE_TYPE (field))
 	      && VECTOR_MODE_P (TYPE_MODE_RAW (TREE_TYPE (field))))
 	    mode = TYPE_MODE (TREE_TYPE (field));
 	}
diff --git a/gcc/testsuite/gcc.target/i386/pr107304.c b/gcc/testsuite/gcc.target/i386/pr107304.c
new file mode 100644
index 00000000000..24d68795e7f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr107304.c
@@ -0,0 +1,39 @@
+/* { dg-do compile } */
+/* { dg-options "-O0 -march=tigerlake" } */
+
+#include <stdint.h>
+
+typedef union {
+  uint8_t v __attribute__((aligned(256))) __attribute__ ((vector_size(64 * sizeof(uint8_t))));
+  uint8_t i[64] __attribute__((aligned(256)));
+} stress_vec_u8_64_t;
+
+typedef struct {
+ struct {
+  stress_vec_u8_64_t s;
+  stress_vec_u8_64_t o;
+  stress_vec_u8_64_t mask1;
+  stress_vec_u8_64_t mask2;
+ } u8_64;
+} stress_vec_data_t;
+
+__attribute__((target_clones("arch=alderlake", "default"))) 
+void
+stress_vecshuf_u8_64(stress_vec_data_t *data)
+{
+  stress_vec_u8_64_t *__restrict s;
+  stress_vec_u8_64_t *__restrict mask1;
+  stress_vec_u8_64_t *__restrict mask2;
+  register int i;
+
+  s = &data->u8_64.s;
+  mask1 = &data->u8_64.mask1;
+  mask2 = &data->u8_64.mask2;
+
+  for (i = 0; i < 256; i++) {	/* was i < 65536 */
+      stress_vec_u8_64_t tmp;
+
+      tmp.v = __builtin_shuffle(s->v, mask1->v);
+      s->v = __builtin_shuffle(tmp.v, mask2->v);
+  }
+}