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() {