diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc
index bd9443d..69d8757 100644
--- a/gcc/simplify-rtx.cc
+++ b/gcc/simplify-rtx.cc
@@ -6109,6 +6109,23 @@ simplify_context::simplify_relational_operation_1 (rtx_code code,
 	break;
       }
 
+  /* (ne:SI (subreg:QI (ashift:SI x 7) 0) 0) -> (and:SI x 1).  */
+  if (code == NE
+      && op1 == const0_rtx
+      && (op0code == TRUNCATE
+	  || (partial_subreg_p (op0)
+	      && subreg_lowpart_p (op0)))
+      && SCALAR_INT_MODE_P (mode)
+      && STORE_FLAG_VALUE == 1)
+    {
+      rtx tmp = XEXP (op0, 0);
+      if (GET_CODE (tmp) == ASHIFT
+	  && GET_MODE (tmp) == mode
+	  && CONST_INT_P (XEXP (tmp, 1))
+	  && is_int_mode (GET_MODE (op0), &int_mode)
+	  && INTVAL (XEXP (tmp, 1)) == GET_MODE_PRECISION (int_mode) - 1)
+	return simplify_gen_binary (AND, mode, XEXP (tmp, 0), const1_rtx);
+    }
   return NULL_RTX;
 }
 
diff --git a/gcc/testsuite/gcc.target/i386/pr106245-1.c b/gcc/testsuite/gcc.target/i386/pr106245-1.c
new file mode 100644
index 0000000..a0403e9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr106245-1.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+int f(int a)
+{
+    return (a << 31) >> 31;
+}
+
+/* { dg-final { scan-assembler-not "sarb" } } */
+/* { dg-final { scan-assembler-not "movsbl" } } */