re PR target/65103 ([i386] GOTOFF relocation is not propagated into address expression)

gcc/

	PR target/65103
	* config/i386/i386.c (ix86_rtx_costs): We want to propagate
	link time constants into adress expressions and therefore set
	their cost to 0.

gcc/testsuite/

	PR target/65103
	* gcc.target/i386/pr65103-3.c: New.

From-SVN: r223119

gcc/ChangeLog

+2015-05-13  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	PR target/65103
+	* config/i386/i386.c (ix86_rtx_costs): We want to propagate
+	link time constants into adress expressions and therefore set
+	their cost to 0.
+
 2015-05-13  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/66112

gcc/config/i386/i386.c

@@ -42006,7 +42006,9 @@ ix86_rtx_costs (rtx x, int code_i, int outer_code_i, int opno, int *total,
 	       && !(TARGET_64BIT
 		    && (GET_CODE (x) == LABEL_REF
 			|| (GET_CODE (x) == SYMBOL_REF
-			    && SYMBOL_REF_LOCAL_P (x)))))
+			    && SYMBOL_REF_LOCAL_P (x))))
+	       /* Use 0 cost for CONST to improve its propagation.  */
+	       && (TARGET_64BIT || GET_CODE (x) != CONST))
 	*total = 1;
       else
 	*total = 0;

gcc/testsuite/ChangeLog

+2015-05-13  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	PR target/65103
+	* gcc.target/i386/pr65103-3.c: New.
+
 2015-05-13  Martin Liska  <mliska@suse.cz>
 
 	* g++.dg/ipa/pr65557.C: Remove unnecessary dump flag.

gcc/testsuite/gcc.target/i386/pr65103-3.c

+/* { dg-do compile { target ia32 } } */
+/* { dg-require-effective-target pie } */
+/* { dg-options "-O2 -fPIE" } */
+/* { dg-final { scan-assembler-not "GOTOFF," } } */
+
+static int *data[100];
+
+void test (long a, long b)
+{
+  do
+    {
+      if( a < b )
+        {
+	  data[a] = data[b];
+	  a++;
+        }
+    }
+  while (a <= b);
+}