[PATCH, PR target/65103, 3/3] Change rtx cost for i386 address constants

[Ilya Enkovich]

On 10 Mar 18:11, Ilya Enkovich wrote:
> Hi,
> 
> This patch changes rtx cost for address constants to 0 similar to what we have in address cost hook beacuse we expect them to be propagated into address expression anyway.  Bootstrapped and tested on x86_64-unknown-linux-gnu.  OK for trunk or stage 1?
> 
> Thanks,
> Ilya

Updated ChangeLog and test.

Thanks,
Ilya
--
gcc/

2015-03-10  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.

gcc/testsuite/

2015-03-10  Ilya Enkovich  <ilya.enkovich@intel.com>

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


diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index b3971b8..341a157 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -42039,7 +42039,8 @@ 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))))
+	       && (TARGET_64BIT || GET_CODE (x) != CONST))
 	*total = 1;
       else
 	*total = 0;
diff --git a/gcc/testsuite/gcc.target/i386/pr65103-3.c b/gcc/testsuite/gcc.target/i386/pr65103-3.c
new file mode 100644
index 0000000..eddf20b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr65103-3.c
@@ -0,0 +1,19 @@
+/* { 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);
+}