diff --git a/fix-when-peeling-for-alignment.patch b/fix-when-peeling-for-alignment.patch
new file mode 100644
index 0000000000000000000000000000000000000000..1d867326698862d0d4931b8faa1dcd9a8b721fe8
--- /dev/null
+++ b/fix-when-peeling-for-alignment.patch
@@ -0,0 +1,23 @@
+diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
+index 36639b697f1..88f14e73d65 100644
+--- a/gcc/tree-vect-data-refs.c
++++ b/gcc/tree-vect-data-refs.c
+@@ -938,6 +938,18 @@ vect_compute_data_ref_alignment (dr_vec_info *dr_info)
+     = exact_div (vect_calculate_target_alignment (dr_info), BITS_PER_UNIT);
+   DR_TARGET_ALIGNMENT (dr_info) = vector_alignment;
+ 
++  /* If the main loop has peeled for alignment we have no way of knowing
++     whether the data accesses in the epilogues are aligned.  We can't at
++     compile time answer the question whether we have entered the main loop or
++     not.  Fixes PR 92351.  */
++  if (loop_vinfo)
++    {
++      loop_vec_info orig_loop_vinfo = LOOP_VINFO_ORIG_LOOP_INFO (loop_vinfo);
++      if (orig_loop_vinfo
++	  && LOOP_VINFO_PEELING_FOR_ALIGNMENT (orig_loop_vinfo) != 0)
++	return;
++    }
++
+   unsigned HOST_WIDE_INT vect_align_c;
+   if (!vector_alignment.is_constant (&vect_align_c))
+     return;
diff --git a/gcc.spec b/gcc.spec
index e928fdfed0e3d2f504a147c7dba587dd4d788836..e203c617cf05fc1353ad123af2f4a8d3b491f603 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -59,7 +59,7 @@
 Summary: Various compilers (C, C++, Objective-C, ...)
 Name: gcc
 Version: %{gcc_version}
-Release: %{DATE}.11
+Release: %{DATE}.12
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
 Source0: gcc-9.3.0.tar.xz
 %global isl_version 0.16.1
@@ -184,6 +184,7 @@ Patch69: fix-ICE-during-GIMPLE-pass-dse.patch
 Patch70: ipa-const-prop-buffer-overflow-bugfix.patch
 Patch71: fix-ICE-in-eliminate_stmt.patch
 Patch72: fix-make-ifcvt-clean-up-dead-comparisons.patch
+Patch73: fix-when-peeling-for-alignment.patch
 
 
 %global gcc_target_platform %{_arch}-linux-gnu
@@ -699,6 +700,7 @@ not stable, so plugins must be rebuilt any time GCC is updated.
 %patch70 -p1
 %patch71 -p1
 %patch72 -p1
+%patch73 -p1
 
 
 %build
@@ -2627,6 +2629,9 @@ end
 %doc rpm.doc/changelogs/libcc1/ChangeLog*
 
 %changelog
+* Tue Sep 22 2020 eastb233 <xiezhiheng@huawei.com> - 9.3.1-20200922.12
+- fix-when-peeling-for-alignment.patch: New file
+
 * Tue Sep 22 2020 eastb233 <xiezhiheng@huawei.com> - 9.3.1-20200922.11
 - gcc.spec: Delete pkgversion