sysv4.h (CC1_ENDIAN_LITTLE_SPEC): Define as empty.

	* config/rs6000/sysv4.h (CC1_ENDIAN_LITTLE_SPEC): Define as empty.
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Default
	to strict alignment on older processors when little-endian.
	* config/rs6000/linux64.h (PROCESSOR_DEFAULT64): Default to power8
	for ELFv2.

From-SVN: r205060

gcc/ChangeLog

+2013-11-20  Alan Modra  <amodra@gmail.com>
+
+	* config/rs6000/sysv4.h (CC1_ENDIAN_LITTLE_SPEC): Define as empty.
+	* config/rs6000/rs6000.c (rs6000_option_override_internal): Default
+	to strict alignment on older processors when little-endian.
+	* config/rs6000/linux64.h (PROCESSOR_DEFAULT64): Default to power8
+	for ELFv2.
+
 2013-11-19  Teresa Johnson  <tejohnson@google.com>
 
 	* common/config/i386/i386-common.c: Enable

gcc/config/rs6000/linux64.h

@@ -71,7 +71,11 @@ extern int dot_symbols;
 #undef  PROCESSOR_DEFAULT
 #define PROCESSOR_DEFAULT PROCESSOR_POWER7
 #undef  PROCESSOR_DEFAULT64
+#ifdef LINUX64_DEFAULT_ABI_ELFv2
+#define PROCESSOR_DEFAULT64 PROCESSOR_POWER8
+#else
 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER7
+#endif
 
 /* We don't need to generate entries in .fixup, except when
    -mrelocatable or -mrelocatable-lib is given.  */

gcc/config/rs6000/rs6000.c

@@ -3222,6 +3222,12 @@ rs6000_option_override_internal (bool global_init_p)
 	}
     }
 
+  /* If little-endian, default to -mstrict-align on older processors.
+     Testing for htm matches power8 and later.  */
+  if (!BYTES_BIG_ENDIAN
+      && !(processor_target_table[tune_index].target_enable & OPTION_MASK_HTM))
+    rs6000_isa_flags |= ~rs6000_isa_flags_explicit & OPTION_MASK_STRICT_ALIGN;
+
   /* Add some warnings for VSX.  */
   if (TARGET_VSX)
     {

gcc/config/rs6000/sysv4.h

@@ -538,12 +538,7 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
 
 #define	CC1_ENDIAN_BIG_SPEC ""
 
-#define	CC1_ENDIAN_LITTLE_SPEC "\
-%{!mstrict-align: %{!mno-strict-align: \
-    %{!mcall-i960-old: \
-	-mstrict-align \
-    } \
-}}"
+#define	CC1_ENDIAN_LITTLE_SPEC ""
 
 #define	CC1_ENDIAN_DEFAULT_SPEC "%(cc1_endian_big)"