diff --git a/Fix-PR94185.patch b/Fix-PR94185.patch
new file mode 100644
index 0000000000000000000000000000000000000000..370ec0abbb49e8cddbe42e1af79372ceba4bc7b8
--- /dev/null
+++ b/Fix-PR94185.patch
@@ -0,0 +1,66 @@
+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-Fix-PR94185-Do-not-reuse-insn-alternative-after-chan.patch
+bae7b38cf8a21e068ad5c0bab089dedb78af3346
+
+diff -uprN a/gcc/lra-spills.c b/gcc/lra-spills.c
+--- a/gcc/lra-spills.c
++++ b/gcc/lra-spills.c
+@@ -427,7 +427,17 @@ remove_pseudos (rtx *loc, rtx_insn *insn)
+          and avoid LRA cycling in case of subreg memory reload.  */
+       res = remove_pseudos (&SUBREG_REG (*loc), insn);
+       if (GET_CODE (SUBREG_REG (*loc)) == MEM)
+-	alter_subreg (loc, false);
++	{
++	  alter_subreg (loc, false);
++	  if (GET_CODE (*loc) == MEM)
++	    {
++	      lra_get_insn_recog_data (insn)->used_insn_alternative = -1;
++	      if (lra_dump_file != NULL)
++		fprintf (lra_dump_file,
++			 "Memory subreg was simplified in in insn #%u\n",
++			 INSN_UID (insn));
++	    }
++	}
+       return res;
+     }
+   else if (code == REG && (i = REGNO (*loc)) >= FIRST_PSEUDO_REGISTER
+diff -uprN a/gcc/testsuite/g++.target/i386/pr94185.C b/gcc/testsuite/g++.target/i386/pr94185.C
+new file mode 100644
+--- /dev/null
++++ b/gcc/testsuite/g++.target/i386/pr94185.C
+@@ -0,0 +1,33 @@
++/* { dg-do compile } */
++/* { dg-options "-O2 -fPIE -fstack-protector-strong" } */
++
++struct a {
++  int b;
++  int c();
++  a() : b(c()) {}
++  ~a();
++  char *e();
++};
++struct f {
++  void g(int);
++};
++struct ar {
++  int au[256];
++  f h(int);
++} bb;
++a i();
++a j(int);
++long k(int, ar);
++int d;
++void l(char *, ar m, long n) {
++  switch (m.au[d])
++  case 0:
++    n &= 4294967295;
++  bb.h(0).g(n);
++}
++void o() {
++  ar bd;
++  a bh, bi, attrname = j(0) = i();
++  int be = k(0, bd);
++  l(attrname.e(), bd, be);
++}
diff --git a/PR92303-Try-to-simplify-memory-subreg.patch b/PR92303-Try-to-simplify-memory-subreg.patch
new file mode 100644
index 0000000000000000000000000000000000000000..31c1acd594a9600cf5098695d9f2bee02823486e
--- /dev/null
+++ b/PR92303-Try-to-simplify-memory-subreg.patch
@@ -0,0 +1,27 @@
+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-PR92303-Try-to-simplify-memory-subreg.patch
+a4504f32c056db781a2bdc104dffa1b29684c930
+
+diff -uprN a/gcc/lra-spills.c b/gcc/lra-spills.c
+--- a/gcc/lra-spills.c
++++ b/gcc/lra-spills.c
+@@ -421,7 +421,16 @@ remove_pseudos (rtx *loc, rtx_insn *insn)
+   if (*loc == NULL_RTX)
+     return res;
+   code = GET_CODE (*loc);
+-  if (code == REG && (i = REGNO (*loc)) >= FIRST_PSEUDO_REGISTER
++  if (code == SUBREG && REG_P (SUBREG_REG (*loc)))
++    {
++      /* Try to remove memory subregs to simplify LRA job
++         and avoid LRA cycling in case of subreg memory reload.  */
++      res = remove_pseudos (&SUBREG_REG (*loc), insn);
++      if (GET_CODE (SUBREG_REG (*loc)) == MEM)
++	alter_subreg (loc, false);
++      return res;
++    }
++  else if (code == REG && (i = REGNO (*loc)) >= FIRST_PSEUDO_REGISTER
+       && lra_get_regno_hard_regno (i) < 0
+       /* We do not want to assign memory for former scratches because
+ 	 it might result in an address reload for some targets.	 In
diff --git a/gcc.spec b/gcc.spec
index cbc790e9ac8f433c3e0e5f4ad64079d35e08a420..7a20ad4ca3390c1fb92d45065e14d156c10169c5 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -1,4 +1,4 @@
-%global DATE 20200522
+%global DATE 20200629
 
 %global gcc_version 9.3.1
 %global gcc_major 9.3.1
@@ -60,7 +60,7 @@
 Summary: Various compilers (C, C++, Objective-C, ...)
 Name: gcc
 Version: %{gcc_version}
-Release: %{gcc_release}.2
+Release: %{gcc_release}.3
 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
@@ -131,6 +131,9 @@ Patch15: fix-ICE-in-vectorizable-load.patch
 Patch16: address-calculation-optimization-within-loop.patch
 Patch17: skip-debug-insns-when-computing-inline-costs.patch
 Patch18: change-gcc-BASE-VER.patch
+Patch19: PR92303-Try-to-simplify-memory-subreg.patch
+Patch20: Fix-PR94185.patch
+Patch21: testsuite-Fix-pr94185.patch
 
 %global gcc_target_platform %{_arch}-linux-gnu
 
@@ -591,6 +594,9 @@ not stable, so plugins must be rebuilt any time GCC is updated.
 %patch16 -p1
 %patch17 -p1
 %patch18 -p1
+%patch19 -p1
+%patch20 -p1
+%patch21 -p1
 
 
 %build
@@ -671,9 +677,9 @@ CC="$CC" CFLAGS="$OPT_FLAGS" \
 %endif
 
 %ifarch sparc sparcv9 sparc64
-make -j %{?_smp_mflags} BOOT_CFLAGS="$OPT_FLAGS" bootstrap
+make -j32 BOOT_CFLAGS="$OPT_FLAGS" bootstrap
 %else
-make -j %{?_smp_mflags} BOOT_CFLAGS="$OPT_FLAGS" BOOT_LDFLAGS="-pie -Wl,-z,relro,-z,now"
+make -j32 BOOT_CFLAGS="$OPT_FLAGS" BOOT_LDFLAGS="-pie -Wl,-z,relro,-z,now"
 %endif
 
 # Make generated man pages even if Pod::Man is not new enough
@@ -1485,7 +1491,7 @@ cd obj-%{gcc_target_platform}
 
 %if %{build_check}
 # run the tests.
-LC_ALL=C make -j %{?_smp_mflags} -k check ALT_CC_UNDER_TEST=gcc ALT_CXX_UNDER_TEST=g++ \
+LC_ALL=C make -j32 -k check ALT_CC_UNDER_TEST=gcc ALT_CXX_UNDER_TEST=g++ \
      RUNTESTFLAGS="--target_board=unix/'{,-fstack-protector-strong}'" || :
 echo ====================TESTING=========================
 ( LC_ALL=C ../contrib/test_summary || : ) 2>&1 | sed -n '/^cat.*EOF/,/^EOF/{/^cat.*EOF/d;/^EOF/d;/^LAST_UPDATED:/d;p;}'
@@ -2519,6 +2525,12 @@ end
 %doc rpm.doc/changelogs/libcc1/ChangeLog*
 
 %changelog
+* Mon Jun 29 2020 eastb233 <xiezhiheng@huawei.com> - 9.3.1-20200312.3
+- PR92303-Try-to-simplify-memory-subreg.patch: New file, fix ICE
+- Fix-PR94185.patch: Likewise
+- testsuite-Fix-pr94185.patch: Likewise
+- gcc.spec: Add new patch
+
 * Fri May 22 2020 eastb233 <xiezhiheng@huawei.com> - 9.3.1-20200312.2
 - gcc.spec: Modify Release to %{release}.2
 
diff --git a/testsuite-Fix-pr94185.patch b/testsuite-Fix-pr94185.patch
new file mode 100644
index 0000000000000000000000000000000000000000..d4d4da218bcb60db3386de6c07521a926dd761e1
--- /dev/null
+++ b/testsuite-Fix-pr94185.patch
@@ -0,0 +1,18 @@
+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-testsuite-Fix-pr94185.C-testcase-on-i686-linux-with-.patch
+994d48620621fa33d32018be5fb70042e38546d5
+
+diff -uprN a/gcc/testsuite/g++.target/i386/pr94185.C b/gcc/testsuite/g++.target/i386/pr94185.C
+--- a/gcc/testsuite/g++.target/i386/pr94185.C
++++ b/gcc/testsuite/g++.target/i386/pr94185.C
+@@ -22,7 +22,7 @@ int d;
+ void l(char *, ar m, long n) {
+   switch (m.au[d])
+   case 0:
+-    n &= 4294967295;
++    n &= 4294967295U;
+   bb.h(0).g(n);
+ }
+ void o() {