diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
index 6a165767630..de055d71654 100644
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -1846,37 +1846,58 @@ Target supports loop vectorization with partial vectors and
 Target supports loop vectorization with partial vectors and
 @code{vect-partial-vector-usage} is nonzero.
 
-@item vect_slp_v2qi_store
+@item vect_slp_v2qi_store_align
 Target supports vectorization of 2-byte char stores with 2-byte aligned
 address at plain @option{-O2}.
 
-@item vect_slp_v4qi_store
+@item vect_slp_v4qi_store_align
 Target supports vectorization of 4-byte char stores with 4-byte aligned
 address at plain @option{-O2}.
 
-@item vect_slp_v8qi_store
-Target supports vectorization of 8-byte char stores with 8-byte aligned
-address at plain @option{-O2}.
+@item vect_slp_v4qi_store_unalign
+Target supports vectorization of 4-byte char stores with unaligned address
+at plain @option{-O2}.
 
-@item vect_slp_v16qi_store
-Target supports vectorization of 16-byte char stores with 16-byte aligned
-address at plain @option{-O2}.
+@item struct_4char_block_move
+Target supports block move for 8-byte aligned 4-byte size struct initialization.
+
+@item vect_slp_v4qi_store_unalign_1
+Target supports vectorization of 4-byte char stores with unaligned address
+or store them with constant pool at plain @option{-O2}.
+
+@item struct_8char_block_move
+Target supports block move for 8-byte aligned 8-byte size struct initialization.
+
+@item vect_slp_v8qi_store_unalign_1
+Target supports vectorization of 8-byte char stores with unaligned address
+or store them with constant pool at plain @option{-O2}.
+
+@item struct_16char_block_move
+Target supports block move for 8-byte aligned 16-byte size struct initialization.
 
-@item vect_slp_v2hi_store
+@item vect_slp_v16qi_store_unalign_1
+Target supports vectorization of 16-byte char stores with unaligned address
+or store them with constant pool at plain @option{-O2}.
+
+@item vect_slp_v2hi_store_align
 Target supports vectorization of 4-byte short stores with 4-byte aligned
-address at plain @option{-O2}.
+addressat plain @option{-O2}.
 
-@item vect_slp_v4hi_store
-Target supports vectorization of 8-byte short stores with 8-byte aligned
-address at plain @option{-O2}.
+@item vect_slp_v2hi_store_unalign
+Target supports vectorization of 4-byte short stores with unaligned address
+at plain @option{-O2}.
 
-@item vect_slp_v2si_store
-Target supports vectorization of 8-byte int stores with 8-byte aligned
-address at plain @option{-O2}.
+@item vect_slp_v4hi_store_unalign
+Target supports vectorization of 8-byte short stores with unaligned address
+at plain @option{-O2}.
 
-@item vect_slp_v4si_store
-Target supports vectorization of 16-byte int stores with 16-byte aligned
-address at plain @option{-O2}.
+@item vect_slp_v2si_store_align
+Target supports vectorization of 8-byte int stores with 8-byte aligned address
+at plain @option{-O2}.
+
+@item vect_slp_v4si_store_unalign
+Target supports vectorization of 16-byte int stores with unaligned address
+at plain @option{-O2}.
 @end table
 
 @subsubsection Thread Local Storage attributes
diff --git a/gcc/testsuite/c-c++-common/Wstringop-overflow-2.c b/gcc/testsuite/c-c++-common/Wstringop-overflow-2.c
index ca38bda73f5..e5802613a9c 100644
--- a/gcc/testsuite/c-c++-common/Wstringop-overflow-2.c
+++ b/gcc/testsuite/c-c++-common/Wstringop-overflow-2.c
@@ -190,7 +190,7 @@ void ga1__ (void)
   struct A1 a = { 1 };
   a.a[0] = 0;
   a.a[1] = 1;                    // { dg-warning "\\\[-Wstringop-overflow" }
-  a.a[2] = 2;                    // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store } } }
+  a.a[2] = 2;                    // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store_align } } }
   sink (&a);
 }
 
@@ -207,7 +207,7 @@ void ga1_0_ (void)
   struct A1 a = { 1, { } };
   a.a[0] = 0;
   a.a[1] = 1;                   // { dg-warning "\\\[-Wstringop-overflow" }
-  a.a[2] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store } } }
+  a.a[2] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store_align } } }
   sink (&a);
 }
 
@@ -221,10 +221,10 @@ void ga1_1 (void)
   a1_1.a[1] = 1;                // { dg-warning "\\\[-Wstringop-overflow" }
   a1_1.a[2] = 2;                // { dg-warning "\\\[-Wstringop-overflow" }
 
-  struct A1 a = { 0, { 1 } };   // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store } } }
+  struct A1 a = { 0, { 1 } };   // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store_align } } }
   a.a[0] = 0;
-  a.a[1] = 1;                   // { dg-warning "\\\[-Wstringop-overflow" "" { xfail { vect_slp_v4qi_store } } }
-  a.a[2] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "" { xfail { vect_slp_v4qi_store } } }
+  a.a[1] = 1;                   // { dg-warning "\\\[-Wstringop-overflow" "" { xfail { vect_slp_v4qi_store_align } } }
+  a.a[2] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "" { xfail { vect_slp_v4qi_store_align } } }
   sink (&a);
 }
 
@@ -289,7 +289,7 @@ void ga1i__ (void)
   struct A1i a = { 0 };
   a.a[0] = 0;
   a.a[1] = 1;                    // { dg-warning "\\\[-Wstringop-overflow" }
-  a.a[2] = 2;                    // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store } } }
+  a.a[2] = 2;                    // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store_align } } }
   sink (&a);
 }
 
@@ -306,7 +306,7 @@ void ga1i_0_ (void)
   struct A1 a = { 0, { } };
   a.a[0] = 0;
   a.a[1] = 1;                   // { dg-warning "\\\[-Wstringop-overflow" }
-  a.a[2] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store } } }
+  a.a[2] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v2qi_store_align } } }
   sink (&a);
 }
 
@@ -320,10 +320,10 @@ void ga1i_1 (void)
   a1i_1.a[1] = 1;               // { dg-warning "\\\[-Wstringop-overflow" }
   a1i_1.a[2] = 2;               // { dg-warning "\\\[-Wstringop-overflow" }
 
-  struct A1 a = { 0, { 1 } };   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { target { vect_slp_v4qi_store } } }
+  struct A1 a = { 0, { 1 } };   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { target { vect_slp_v4qi_store_align } } }
   a.a[0] = 1;
-  a.a[1] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v4qi_store } } }
-  a.a[2] = 3;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v4qi_store } } }
+  a.a[1] = 2;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v4qi_store_align } } }
+  a.a[2] = 3;                   // { dg-warning "\\\[-Wstringop-overflow" "pr102462" { xfail { vect_slp_v4qi_store_align } } }
   sink (&a);
 }
 
diff --git a/gcc/testsuite/gcc.dg/Warray-bounds-48.c b/gcc/testsuite/gcc.dg/Warray-bounds-48.c
index 19b7634c063..29b20863846 100644
--- a/gcc/testsuite/gcc.dg/Warray-bounds-48.c
+++ b/gcc/testsuite/gcc.dg/Warray-bounds-48.c
@@ -30,7 +30,7 @@ static void nowarn_ax_extern (struct AX *p)
 
 static void warn_ax_local_buf (struct AX *p)
 {
-  p->ax[0] = 4; p->ax[1] = 5;  // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2hi_store &&  { ! vect_slp_v4hi_store } } } }
+  p->ax[0] = 4; p->ax[1] = 5;  // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2hi_store_align &&  { ! vect_slp_v4hi_store_unalign } } } }
 
   p->ax[2] = 6;     // { dg-warning "\\\[-Warray-bounds" }
   p->ax[3] = 7;     // { dg-warning "\\\[-Warray-bounds" }
@@ -130,7 +130,7 @@ static void warn_a0_extern (struct A0 *p)
 
 static void warn_a0_local_buf (struct A0 *p)
 {
-  p->a0[0] = 4; p->a0[1] = 5;  // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2hi_store && { ! vect_slp_v4hi_store } } } }
+  p->a0[0] = 4; p->a0[1] = 5;  // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2hi_store_align && { ! vect_slp_v4hi_store_unalign } } } }
 
   p->a0[2] = 6;     // { dg-warning "\\\[-Warray-bounds" }
   p->a0[3] = 7;     // { dg-warning "\\\[-Warray-bounds" }
diff --git a/gcc/testsuite/gcc.dg/Warray-bounds-51.c b/gcc/testsuite/gcc.dg/Warray-bounds-51.c
index 8b589f38191..7519b0fed79 100644
--- a/gcc/testsuite/gcc.dg/Warray-bounds-51.c
+++ b/gcc/testsuite/gcc.dg/Warray-bounds-51.c
@@ -39,7 +39,7 @@ void test_struct_char_vla_location (void)
   } s;
 
   s.cvla[0] = __LINE__;
-  s.cvla[nelts - 1] = 0; // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2qi_store } } }
+  s.cvla[nelts - 1] = 0; // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2qi_store_align } } }
   s.cvla[nelts] = 0;  // { dg-warning "\\\[-Warray-bounds" }
 
   sink (&s);
diff --git a/gcc/testsuite/gcc.dg/Warray-parameter-3.c b/gcc/testsuite/gcc.dg/Warray-parameter-3.c
index b6ed8daf51c..b888511ce1e 100644
--- a/gcc/testsuite/gcc.dg/Warray-parameter-3.c
+++ b/gcc/testsuite/gcc.dg/Warray-parameter-3.c
@@ -77,7 +77,7 @@ gia3 (int a[3])
 __attribute__ ((noipa)) void
 gcas3 (char a[static 3])
 {
-  a[0] = 0; a[1] = 1; a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store } } }
+  a[0] = 0; a[1] = 1; a[2] = 2; // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store_unalign } } }
   a[3] = 3;                   // { dg-warning "\\\[-Warray-bounds" }
 }
 
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-14.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-14.c
index c4a3f05d883..3d1d9e54d4a 100644
--- a/gcc/testsuite/gcc.dg/Wstringop-overflow-14.c
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-14.c
@@ -36,8 +36,8 @@ void test_memcpy_cond (int i)
 void test_int16 (void)
 {
   char *p = a4 + 1;
-  *(int16_t*)p = 0;    // { dg-warning "writing 4 bytes into a region of size 3" "pr102706" { target { vect_slp_v2hi_store } } }
-  *(int16_t*)(p + 2) = 0;   // { dg-warning "writing 2 bytes into a region of size 1" "pr102706" { xfail { vect_slp_v2hi_store } } }
+  *(int16_t*)p = 0;    // { dg-warning "writing 4 bytes into a region of size 3" "pr102706" { target { vect_slp_v2hi_store_unalign } } }
+  *(int16_t*)(p + 2) = 0;   // { dg-warning "writing 2 bytes into a region of size 1" "pr102706" { xfail { vect_slp_v2hi_store_unalign } } }
 }
 
 
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-21.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-21.c
index 3fccfc9a798..4cd3c1b4f62 100644
--- a/gcc/testsuite/gcc.dg/Wstringop-overflow-21.c
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-21.c
@@ -23,10 +23,10 @@ void test_store_zero_length (int i)
 {
   char a[3];
   struct S0 *p = (struct S0*)a;
-  p->a = 0;                         // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store } } }
+  p->a = 0;                         // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store_align } } }
   p->b[0] = 0;
   p->b[1] = 1;                      // { dg-bogus "\\\[-Wstringop-overflow" }
-  p->b[2] = 2;                      // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { xfail { vect_slp_v4qi_store } } }
+  p->b[2] = 2;                      // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { xfail { vect_slp_v4qi_store_align } } }
   p->b[i] = 2;
   sink (p);
 }
@@ -50,10 +50,10 @@ void test_store_flexarray (int i)
 {
   char a[3];
   struct Sx *p = (struct Sx*)a;
-  p->a = 0;                         // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store } } }
+  p->a = 0;                         // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v4qi_store_align } } }
   p->b[0] = 0;
   p->b[1] = 1;                      // { dg-bogus "\\\[-Wstringop-overflow" }
-  p->b[2] = 1;                      // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { xfail { vect_slp_v4qi_store } } }
+  p->b[2] = 1;                      // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { xfail { vect_slp_v4qi_store_align } } }
   p->b[i] = 2;
   sink (p);
 }
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-68.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-68.c
index 04e91afb8bc..05ea56fca67 100644
--- a/gcc/testsuite/gcc.dg/Wstringop-overflow-68.c
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-68.c
@@ -65,11 +65,11 @@ void warn_comp_lit (void)
   // MEM <vector(8) char> [(char *)&a7] = { 0, 1, 2, 3, 4, 5, 6, 7 };
   // MEM <vector(16) char> [(char *)&a15] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
   // and warning should be expected, refer to PR102722.
-  *(AC4*)a2 = Ac4;      // { dg-warning "writing 4 bytes into a region of size 2" "pr101475" { xfail { ! { vect_slp_v4qi_store } } } }
-  *(AC4*)a3 = Ac4;      // { dg-warning "writing 4 bytes into a region of size 3" "pr101475" { xfail { ! { vect_slp_v4qi_store } } } }
-  *(AC8*)a4 = Ac8;      // { dg-warning "writing 8 bytes into a region of size 4" "pr101475" { xfail { ! { vect_slp_v8qi_store } } } }
-  *(AC8*)a7 = Ac8;      // { dg-warning "writing 8 bytes into a region of size 7" "pr101475" { xfail { ! { vect_slp_v8qi_store } } } }
-  *(AC16*)a15 = Ac16;   // { dg-warning "writing 16 bytes into a region of size 15" "pr101475" { xfail { ! { vect_slp_v16qi_store } } } }
+  *(AC4*)a2 = Ac4;      // { dg-warning "writing 4 bytes into a region of size 2" "pr101475" { xfail { ! { vect_slp_v4qi_store_unalign_1 } } } }
+  *(AC4*)a3 = Ac4;      // { dg-warning "writing 4 bytes into a region of size 3" "pr101475" { xfail { ! { vect_slp_v4qi_store_unalign_1 } } } }
+  *(AC8*)a4 = Ac8;      // { dg-warning "writing 8 bytes into a region of size 4" "pr101475" { xfail { ! { vect_slp_v8qi_store_unalign_1 } } } }
+  *(AC8*)a7 = Ac8;      // { dg-warning "writing 8 bytes into a region of size 7" "pr101475" { xfail { ! { vect_slp_v8qi_store_unalign_1 } } } }
+  *(AC16*)a15 = Ac16;   // { dg-warning "writing 16 bytes into a region of size 15" "pr101475" { xfail { ! { vect_slp_v16qi_store_unalign_1 } } } }
 }
 
 void warn_aggr_decl (void)
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-76.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-76.c
index 52467267a04..ee315a0c002 100644
--- a/gcc/testsuite/gcc.dg/Wstringop-overflow-76.c
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-76.c
@@ -27,10 +27,10 @@ void max_a3_a5 (int i)
      by its own warning independently of -Wstringop-overflow.  */
   char *d = MAX (p, q);
 
-  d[2] = 0;         // { dg-warning "writing 4 bytes into a region of size 3" "pr102706" { target { vect_slp_v4qi_store } } }
+  d[2] = 0;         // { dg-warning "writing 4 bytes into a region of size 3" "pr102706" { target { vect_slp_v4qi_store_unalign } } }
   d[3] = 0;
   d[4] = 0;
-  d[5] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102706" { xfail { vect_slp_v4qi_store } } }
+  d[5] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102706" { xfail { vect_slp_v4qi_store_unalign } } }
 }
 
 
@@ -44,10 +44,10 @@ void max_b6_b4 (int i)
   char *q = b4 + i;
   char *d = MAX (p, q);
 
-  d[3] = 0;         // { dg-warning "writing 4 bytes into a region of size 3" "pr102706" { target { vect_slp_v4qi_store } } }
+  d[3] = 0;         // { dg-warning "writing 4 bytes into a region of size 3" "pr102706" { target { vect_slp_v4qi_store_unalign } } }
   d[4] = 0;
   d[5] = 0;
-  d[6] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102706" { xfail { vect_slp_v4qi_store } } }
+  d[6] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102706" { xfail { vect_slp_v4qi_store_unalign } } }
 }
 
 
@@ -83,7 +83,7 @@ struct A3_5
 {
   char a3[3];  // { dg-message "at offset 3 into destination object 'a3' of size 3" "pr??????" { xfail *-*-* } }
   // refer to pr102697 for xfail
-  char a5[5];  // { dg-message "at offset 5 into destination object 'a5' of size 5" "note" { xfail { vect_slp_v4qi_store } } }
+  char a5[5];  // { dg-message "at offset 5 into destination object 'a5' of size 5" "note" { xfail { vect_slp_v4qi_store_unalign } } }
 };
 
 void max_A3_A5 (int i, struct A3_5 *pa3_5)
@@ -96,7 +96,7 @@ void max_A3_A5 (int i, struct A3_5 *pa3_5)
   d[2] = 0;
   d[3] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr??????" { xfail *-*-* } }
   d[4] = 0;
-  d[5] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102697" { xfail { vect_slp_v4qi_store } } }
+  d[5] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102697" { xfail { vect_slp_v4qi_store_unalign } } }
 }
 
 
@@ -104,7 +104,7 @@ struct B4_B6
 {
   char b4[4];
   // refer to pr102697 for xfail
-  char b6[6];       // { dg-message "at offset \[^a-zA-Z\n\r\]*6\[^a-zA-Z0-9\]* into destination object 'b6' of size 6" "note" { xfail { vect_slp_v4qi_store } } }
+  char b6[6];       // { dg-message "at offset \[^a-zA-Z\n\r\]*6\[^a-zA-Z0-9\]* into destination object 'b6' of size 6" "note" { xfail { vect_slp_v4qi_store_unalign } } }
 };
 
 void max_B6_B4 (int i, struct B4_B6 *pb4_b6)
@@ -116,7 +116,7 @@ void max_B6_B4 (int i, struct B4_B6 *pb4_b6)
   d[3] = 0;
   d[4] = 0;
   d[5] = 0;
-  d[6] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102697" { xfail { vect_slp_v4qi_store } } }
+  d[6] = 0;         // { dg-warning "writing 1 byte into a region of size 0" "pr102697" { xfail { vect_slp_v4qi_store_unalign } } }
 }
 
 
diff --git a/gcc/testsuite/gcc.dg/Wzero-length-array-bounds-2.c b/gcc/testsuite/gcc.dg/Wzero-length-array-bounds-2.c
index b2321495afc..2ef5ccd564a 100644
--- a/gcc/testsuite/gcc.dg/Wzero-length-array-bounds-2.c
+++ b/gcc/testsuite/gcc.dg/Wzero-length-array-bounds-2.c
@@ -87,7 +87,7 @@ void test_C_global_buf (void)
   p->b1.a[ 1].i = 0;     // { dg-warning "\\\[-Wzero-length-bounds" }
   sink (p);
 
-  p->b2.a[ 0].i = 0;    // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2si_store &&  { ! vect_slp_v4si_store } } } }
+  p->b2.a[ 0].i = 0;    // { dg-warning "\\\[-Wstringop-overflow" "pr102706" { target { vect_slp_v2si_store_align &&  { ! vect_slp_v4si_store_unalign } } } }
   p->b2.a[ 1].i = 0;
   p->b2.a[ 2].i = 0;     // { dg-warning "\\\[-Warray-bounds" }
   p->b2.a[ 3].i = 0;     // { dg-warning "\\\[-Warray-bounds" }
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 1c8b1ebb86e..e07d563f6f4 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -7584,95 +7584,149 @@ proc check_effective_target_vect_element_align_preferred { } {
 # Return zero if the desirable pattern isn't found.
 # It's used by Warray-bounds/Wstringop-overflow testcases which are
 # regressed by O2 vectorization, refer to PR102697/PR102462/PR102706
-proc check_vect_slp_aligned_store_usage { pattern macro } {
+proc check_vect_slp_store_usage { pattern macro } {
     global tool
 
     set result [check_compile slp_aligned_store_usage assembly {
-	char a[16] __attribute__ ((aligned (16)));
-	short b[4] __attribute__((aligned(8)));
-	int c[4] __attribute__((aligned(16)));
-	#ifdef TEST_V8QI
+	extern void sink (void* );
+	#define Ac8 (AC8){ 0, 1, 2, 3, 4, 5, 6, 7 }
+	#define Ac16 (AC16){ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }
+	#ifdef TEST_V16QI
+	typedef struct AC16 { char a[16]; } AC16;
+	extern char a16[16];
 	void
-	foo ()
+	foo1 ()
 	{
-	    a[0] = 0;
-	    a[1] = 1;
-	    a[2] = 2;
-	    a[3] = 3;
-	    a[4] = 4;
-	    a[5] = 5;
-	    a[6] = 6;
-	    a[7] = 7;
-	}
-	#elif TEST_V16QI
+	    *(AC16*)a16 = Ac16;
+	}
+	#elif TEST_V8QI
+	typedef struct AC8 { char a[8]; } AC8;
+	extern char a8[8];
 	void
-	foo1 ()
+	foo ()
 	{
-	    a[0] = 0;
-	    a[1] = 1;
-	    a[2] = 2;
-	    a[3] = 3;
-	    a[4] = 4;
-	    a[5] = 5;
-	    a[6] = 6;
-	    a[7] = 7;
-	    a[8] = 8;
-	    a[9] = 9;
-	    a[10] = 10;
-	    a[11] = 11;
-	    a[12] = 12;
-	    a[13] = 13;
-	    a[14] = 14;
-	    a[15] = 15;
+	    *(AC8*)a8 = Ac8;
 	}
 	#elif TEST_V4QI
+	struct A1
+	{
+	    char n;
+	    char a[3];
+	};
+
+	extern void sink (void*);
 	void
 	foo2 ()
 	{
-	    a[0] = 0;
-	    a[1] = 1;
-	    a[2] = 2;
-	    a[3] = 3;
+	    struct A1 a = { 0, {  } };
+	    a.a[0] = 3;
+	    a.a[1] = 4;
+	    a.a[2] = 5;
+	    sink (&a);
+	}
+	#elif TEST_V4QI_2
+	extern char p[4];
+	void
+	foo2_2 ()
+	{
+	    p[0] = 0;
+	    p[1] = 1;
+	    p[2] = 2;
+	    p[3] = 3;
+	}
+	#elif TEST_V4QI_3
+	#define Ac4 (AC4){ 0, 1, 2, 3 }
+	typedef struct AC4 { char a[4]; } AC4;
+	extern char a[4];
+	void
+	foo ()
+	{
+	    *(AC4*)a = Ac4;
 	}
 	#elif TEST_V2QI
+	struct A2
+	{
+	    char a[2];
+	};
 	void
 	foo3 ()
 	{
-	    a[0] = 0;
-	    a[1] = 1;
+	    struct A2 a;
+	    a.a[0] = 3;
+	    a.a[1] = 4;
+	    sink (&a);
+	}
+	#elif TEST_V4HI
+	struct Ax
+	{
+	    int n;
+	    short a[4];
+	};
+	void
+	foo5 (struct Ax *p)
+	{
+	    p->a[0] = 0;
+	    p->a[1] = 1;
+	    p->a[2] = 2;
+	    p->a[3] = 3;
 	}
 	#elif TEST_V2HI
+	extern char b[4];
 	void
 	foo4 ()
 	{
-	    b[0] = 0;
-	    b[1] = 1;
+	    *(short*) b = 0;
+	    *(short*) (b + 2) = 1;
 	}
-	#elif TEST_V4HI
+	#elif TEST_V2HI_2
+	struct Ax
+	{
+	    int n;
+	    short a[2];
+	};
 	void
-	foo5 ()
+	foo4_2 (struct Ax *p)
 	{
-	    b[0] = 0;
-	    b[1] = 1;
-	    b[2] = 2;
-	    b[3] = 3;
+	    p->a[0] = 0;
+	    p->a[1] = 1;
 	}
-	#elif TEST_V2SI
+	#elif TEST_V4SI
+	struct A { int i; };
+	struct B { int j; struct A a[4]; };
+
+	struct C
+	{
+	    struct B b1;
+	    struct B b2;
+	};
+	char cbuf2[2 * sizeof (struct C)] = { };
 	void
 	foo6 ()
 	{
-	    c[0] = 0;
-	    c[1] = 1;
+	    struct C *p = (struct C*)&cbuf2;
+	    p->b2.a[0].i = 0;
+	    p->b2.a[1].i = 0;
+	    p->b2.a[2].i = 0;
+	    p->b2.a[3].i = 0;
 	}
-	#elif TEST_V4SI
+	#elif TEST_V2SI
+	struct A { int i; };
+	struct B { int j; struct A a[2]; };
+
+	struct C
+	{
+	    struct B b1;
+	    struct B b2;
+	};
+	char cbuf2[2 * sizeof (struct C)] = { };
 	void
-	foo7 ()
+	foo6 ()
 	{
-	    c[0] = 0;
-	    c[1] = 1;
-	    c[2] = 2;
-	    c[3] = 3;
+	    struct C *p = (struct C*)&cbuf2;
+	    p->b2.a[0].i = 0;
+	    p->b2.a[1].i = 0;
 	}
+
 	#endif
     } "-O2 -fopt-info-all -D$macro" ]
 
@@ -7691,75 +7745,164 @@ proc check_vect_slp_aligned_store_usage { pattern macro } {
 
 # Return the true if target support vectorization of 2-byte char stores
 # with 2-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v2qi_store { } {
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v2qi_store_align { } {
     set pattern {add new stmt: MEM <vector\(2\) char>}
     set macro "TEST_V2QI"
-    return [check_cached_effective_target vect_slp_v2qi_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro] }]
+    return [check_cached_effective_target vect_slp_v2qi_store_align {
+	expr [check_vect_slp_store_usage $pattern $macro] }]
 
 }
 
 # Return the true if target support vectorization of 4-byte char stores
 # with 4-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v4qi_store { } {
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v4qi_store_align { } {
     set pattern {add new stmt: MEM <vector\(4\) char>}
     set macro "TEST_V4QI"
-    return [check_cached_effective_target vect_slp_v4qi_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro ] }]
+    return [check_cached_effective_target vect_slp_v4qi_store_align {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
+}
+
+# Return the true if target support vectorization of 4-byte char stores
+# with unaligned address at plain O2.
+proc check_effective_target_vect_slp_v4qi_store_unalign { } {
+    set pattern {add new stmt: MEM <vector\(4\) char>}
+    set macro "TEST_V4QI_2"
+    return [check_cached_effective_target vect_slp_v4qi_store_unalign {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
+}
+
+# Return the true if target support block move for
+# 8-byte aligned 4-byte size struct initialization.
+proc check_effective_target_struct_4char_block_move { } {
+    set pattern {not vectorized: more than one data ref in stmt:}
+    set macro "TEST_V4QI_3"
+    return [check_cached_effective_target struct_4char_block_move {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
+}
+
+# Return the true if target support vectorization of 4-byte char stores
+# with unaligned address or store them with a constant pool at plain O2.
+proc check_effective_target_vect_slp_v4qi_store_unalign_1 { } {
+    set pattern {add new stmt: MEM <vector\(4\) char>}
+    set macro "TEST_V4QI_3"
+    return [check_cached_effective_target vect_slp_v4qi_store_unalign_1 {
+	expr { [check_vect_slp_store_usage $pattern $macro ]
+	       || [check_effective_target_struct_4char_block_move] } }]
+}
+
+# Return the true if target support block move for
+# 8-byte aligned 8-byte size struct initialization.
+proc check_effective_target_struct_8char_block_move { } {
+    set pattern {not vectorized: more than one data ref in stmt:}
+    set macro "TEST_V8QI"
+    return [check_cached_effective_target struct_8char_block_move {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
 }
 
 # Return the true if target support vectorization of 8-byte char stores
-# with 8-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v8qi_store { } {
+# with unaligned address or store them with a constant pool at plain O2.
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v8qi_store_unalign_1 { } {
     set pattern {add new stmt: MEM <vector\(8\) char>}
     set macro "TEST_V8QI"
-    return [check_cached_effective_target vect_slp_v8qi_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro ] }]
+    return [check_cached_effective_target vect_slp_v8qi_store_unalign_1 {
+	expr { [check_vect_slp_store_usage $pattern $macro ]
+	       || [check_effective_target_struct_8char_block_move] } }]
+}
+
+# Return the true if target support block move for
+# 8-byte aligned 16-byte size struct initialization.
+proc check_effective_target_struct_16char_block_move { } {
+    set pattern {not vectorized: more than one data ref in stmt:}
+    set macro "TEST_V16QI"
+    return [check_cached_effective_target struct_16char_block_move {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
 }
 
 # Return the true if target support vectorization of 16-byte char stores
-# with 16-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v16qi_store { } {
+# with unaligned address or store them with a constant pool at plain O2.
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v16qi_store_unalign_1 { } {
     set pattern {add new stmt: MEM <vector\(16\) char>}
     set macro "TEST_V16QI"
-    return [check_cached_effective_target vect_slp_v16qi_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro ] }]
+    return [check_cached_effective_target vect_slp_v16qi_store_unalign_1 {
+	expr { [check_vect_slp_store_usage $pattern $macro ]
+	       || [check_effective_target_struct_16char_block_move] } }]
 }
 
 # Return the true if target support vectorization of 4-byte short stores
-# with 4-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v2hi_store { } {
+# with unaligned address at plain O2.
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v2hi_store_unalign { } {
     set pattern {add new stmt: MEM <vector\(2\) short int>}
     set macro "TEST_V2HI"
-    return [check_cached_effective_target vect_slp_v2hi_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro ] }]
+    return [check_cached_effective_target vect_slp_v2hi_store_unalign {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
+}
+
+# Return the true if target support vectorization of 4-byte short stores
+# with 4-byte aligned address at plain O2.
+proc check_effective_target_vect_slp_v2hi_store_align { } {
+    set pattern {add new stmt: MEM <vector\(2\) short int>}
+    set macro "TEST_V2HI_2"
+    return [check_cached_effective_target vect_slp_v2hi_store_align {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
 }
 
 # Return the true if target support vectorization of 8-byte short stores
-# with 8-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v4hi_store { } {
+# with unaligned address at plain O2.
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v4hi_store_unalign { } {
     set pattern {add new stmt: MEM <vector\(4\) short int>}
     set macro "TEST_V4HI"
-    return [check_cached_effective_target vect_slp_v4hi_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro ] }]
+    return [check_cached_effective_target vect_slp_v4hi_store_unalign {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
 }
 
 # Return the true if target support vectorization of 8-byte int stores
 # with 8-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v2si_store { } {
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v2si_store_align { } {
     set pattern {add new stmt: MEM <vector\(2\) int>}
     set macro "TEST_V2SI"
-    return [check_cached_effective_target vect_slp_v2si_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro ] }]
+    return [check_cached_effective_target vect_slp_v2si_store_align {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
 }
 
 # Return the true if target support vectorization of 16-byte int stores
-# with 16-byte aligned address at plain O2.
-proc check_effective_target_vect_slp_v4si_store { } {
+# with unaligned address at plain O2.
+# NB: This target should be removed after real issues are fixed for
+# -Wstringop-overflow with O2 vect. Be careful if you want to reuse
+# this target since tests in check_vect_slp_store_usage
+# is the exact match of relative testcases
+proc check_effective_target_vect_slp_v4si_store_unalign { } {
     set pattern {add new stmt: MEM <vector\(4\) int>}
     set macro "TEST_V4SI"
-    return [check_cached_effective_target vect_slp_v4si_store {
-	expr [check_vect_slp_aligned_store_usage $pattern $macro ] }]
+    return [check_cached_effective_target vect_slp_v4si_store_unalign {
+	expr [check_vect_slp_store_usage $pattern $macro ] }]
 }
 
 # Return 1 if we can align stack data to the preferred vector alignment.
