i386.c (processor_target_table): Increase maximum skip from 7 byte to 10 byte for Pentium Pro...

2007-06-21  H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/i386.c (processor_target_table): Increase maximum
	skip from 7 byte to 10 byte for Pentium Pro, Core 2 Duo and
	default 64bit.

	* config/i386/linux.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Ensure 8
	byte alignment if > 8 byte alignment is preferred.
	* config/i386/x86-64.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Likewise.

From-SVN: r125920

gcc/ChangeLog

+2007-06-21  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/i386/i386.c (processor_target_table): Increase maximum
+	skip from 7 byte to 10 byte for Pentium Pro, Core 2 Duo and
+	default 64bit.
+
+	* config/i386/linux.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Ensure 8
+	byte alignment if > 8 byte alignment is preferred.
+	* config/i386/x86-64.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Likewise.
+
 2007-06-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/31866

gcc/config/i386/i386.c

@@ -1726,16 +1726,16 @@ override_options (void)
       {&i386_cost, 4, 3, 4, 3, 4},
       {&i486_cost, 16, 15, 16, 15, 16},
       {&pentium_cost, 16, 7, 16, 7, 16},
-      {&pentiumpro_cost, 16, 15, 16, 7, 16},
+      {&pentiumpro_cost, 16, 15, 16, 10, 16},
       {&geode_cost, 0, 0, 0, 0, 0},
       {&k6_cost, 32, 7, 32, 7, 32},
       {&athlon_cost, 16, 7, 16, 7, 16},
       {&pentium4_cost, 0, 0, 0, 0, 0},
       {&k8_cost, 16, 7, 16, 7, 16},
       {&nocona_cost, 0, 0, 0, 0, 0},
-      {&core2_cost, 16, 7, 16, 7, 16},
+      {&core2_cost, 16, 10, 16, 10, 16},
       {&generic32_cost, 16, 7, 16, 7, 16},
-      {&generic64_cost, 16, 7, 16, 7, 16},
+      {&generic64_cost, 16, 10, 16, 10, 16},
       {&amdfam10_cost, 32, 24, 32, 7, 32}
     };
 

gcc/config/i386/linux.h

@@ -145,7 +145,13 @@ Boston, MA 02110-1301, USA.  */
   do {									\
     if ((LOG) != 0) {							\
       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
-      else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
+      else {								\
+	fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
+	/* Make sure that we have at least 8 byte alignment if > 8 byte \
+	   alignment is preferred.  */					\
+	if ((LOG) > 3 && (1 << (LOG)) > ((MAX_SKIP) + 1))		\
+	  fprintf ((FILE), "\t.p2align 3\n");				\
+      }									\
     }									\
   } while (0)
 #endif

gcc/config/i386/x86-64.h

@@ -66,7 +66,13 @@ Boston, MA 02110-1301, USA.  */
   do {									\
     if ((LOG) != 0) {							\
       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
-      else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
+      else {								\
+	fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
+	/* Make sure that we have at least 8 byte alignment if > 8 byte \
+	   alignment is preferred.  */					\
+	if ((LOG) > 3 && (1 << (LOG)) > ((MAX_SKIP) + 1))		\
+	  fprintf ((FILE), "\t.p2align 3\n");				\
+      }									\
     }									\
   } while (0)
 #endif