This backport contains 1 patch from gcc main stream tree.
The commit id of these patchs list as following in the order of time.

0001-re-PR-tree-optimization-92162-ICE-in-vect_create_epi.patch
53b15ca96116544a7a3ca8bc5f4e1649b74f3d45

diff -Nurp gcc-9.3.0_org/gcc/tree-vect-loop.c gcc-9.3.0/gcc/tree-vect-loop.c
--- gcc-9.3.0_org/gcc/tree-vect-loop.c	2020-08-17 10:23:55.768000000 +0800
+++ gcc-9.3.0/gcc/tree-vect-loop.c	2020-08-17 10:27:15.848000000 +0800
@@ -4574,9 +4574,9 @@ vect_create_epilog_for_reduction (stmt_v
 	 (CCOMPARE).  The then and else values mirror the main VEC_COND_EXPR:
 	 the reduction phi corresponds to NEW_PHI_TREE and the new values
 	 correspond to INDEX_BEFORE_INCR.  */
-      gcc_assert (STMT_VINFO_REDUC_IDX (stmt_info) >= 1);
+      gcc_assert (STMT_VINFO_REDUC_IDX (reduc_info) >= 1);
       tree index_cond_expr;
-      if (STMT_VINFO_REDUC_IDX (stmt_info) == 2)
+      if (STMT_VINFO_REDUC_IDX (reduc_info) == 2)
 	index_cond_expr = build3 (VEC_COND_EXPR, cr_index_vector_type,
 				  ccompare, indx_before_incr, new_phi_tree);
       else
diff -Nurp gcc-9.3.0_org/gcc/tree-vect-stmts.c gcc-9.3.0/gcc/tree-vect-stmts.c
--- gcc-9.3.0_org/gcc/tree-vect-stmts.c	2020-08-17 10:23:53.960000000 +0800
+++ gcc-9.3.0/gcc/tree-vect-stmts.c	2020-08-17 10:27:15.848000000 +0800
@@ -9077,7 +9077,7 @@ vectorizable_condition (stmt_vec_info st
 	return false;
       reduc_info = info_for_reduction (stmt_info);
       reduction_type = STMT_VINFO_REDUC_TYPE (reduc_info);
-      reduc_index = STMT_VINFO_REDUC_IDX (stmt_info);
+      reduc_index = STMT_VINFO_REDUC_IDX (reduc_info);
       gcc_assert (reduction_type != EXTRACT_LAST_REDUCTION
 		  || reduc_index != -1);
     }