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

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1906845ed58e024ac6561f02adbc2c39afb4fce4..2bb07a570233ea219646633440afb31683ce0795 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+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

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index bda32570d54000d2f23193831c80965d28d287dc..de333d88a880cdfb9885e2fc2fe07535c1f7ac8e 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/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;

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 0f6b188e15f59ed4584a9408057e585a390ac00a..b5f96f3693ad6f057987c04535968d52c01d1535 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+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.

diff --git a/gcc/testsuite/gcc.target/i386/pr65103-3.c b/gcc/testsuite/gcc.target/i386/pr65103-3.c
new file mode 100644 (file)
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);
+}