2015-03-02 Michael Meissner <meissner@linux.vnet.ibm.com>

	PR 65138/target
	* config/rs6000/rs6000-cpus.def (powerpc64le): Add new generic
	processor type for 64-bit little endian PowerPC.

	* config/rs6000/rs6000.c (rs6000_option_override_internal): If
	-mdebug=reg, print TARGET_DEFAULT.  Fix logic to use
	TARGET_DEFAULT if there is no default cpu.  Fix -mdebug=reg
	printing built-in mask so it does not pass NULL pointers.

	* doc/invoke.texi (IBM RS/6000 and PowerPC options): Document
	-mcpu=powerpc64le.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@221132 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 25 insertions, 15 deletions

diff --git a/gcc/config/rs6000/rs6000-cpus.def b/gcc/config/rs6000/rs6000-cpus.def
index e94994ab306..9fd565286f2 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -193,4 +193,5 @@ RS6000_CPU ("power7", PROCESSOR_POWER7,   /* Don't add MASK_ISEL by default */
 RS6000_CPU ("power8", PROCESSOR_POWER8, MASK_POWERPC64 | ISA_2_7_MASKS_SERVER)
 RS6000_CPU ("powerpc", PROCESSOR_POWERPC, 0)
 RS6000_CPU ("powerpc64", PROCESSOR_POWERPC64, MASK_PPC_GFXOPT | MASK_POWERPC64)
+RS6000_CPU ("powerpc64le", PROCESSOR_POWER8, MASK_POWERPC64 | ISA_2_7_MASKS_SERVER)
 RS6000_CPU ("rs64", PROCESSOR_RS64A, MASK_PPC_GFXOPT | MASK_POWERPC64)
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index e72fa654f5f..3171eef2323 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -3211,6 +3211,10 @@ rs6000_option_override_internal (bool global_init_p)
     = ((global_init_p || target_option_default_node == NULL)
        ? NULL : TREE_TARGET_OPTION (target_option_default_node));
 
+  /* Print defaults.  */
+  if ((TARGET_DEBUG_REG || TARGET_DEBUG_TARGET) && global_init_p)
+    rs6000_print_isa_options (stderr, 0, "TARGET_DEFAULT", TARGET_DEFAULT);
+
   /* Remember the explicit arguments.  */
   if (global_init_p)
     rs6000_isa_flags_explicit = global_options_set.x_rs6000_isa_flags;
@@ -3287,7 +3291,13 @@ rs6000_option_override_internal (bool global_init_p)
     }
   else
     {
-      const char *default_cpu = (TARGET_POWERPC64 ? "powerpc64" : "powerpc");
+      /* PowerPC 64-bit LE requires at least ISA 2.07.  */
+      const char *default_cpu = ((!TARGET_POWERPC64)
+				 ? "powerpc"
+				 : ((BYTES_BIG_ENDIAN)
+				    ? "powerpc64"
+				    : "powerpc64le"));
+
       rs6000_cpu_index = cpu_index = rs6000_cpu_name_lookup (default_cpu);
       have_cpu = false;
     }
@@ -3306,15 +3316,18 @@ rs6000_option_override_internal (bool global_init_p)
 			   & set_masks);
     }
   else
-    rs6000_isa_flags |= (processor_target_table[cpu_index].target_enable
-			 & ~rs6000_isa_flags_explicit);
+    {
+      /* If no -mcpu=<xxx>, inherit any default options that were cleared via
+	 POWERPC_MASKS.  Originally, TARGET_DEFAULT was used to initialize
+	 target_flags via the TARGET_DEFAULT_TARGET_FLAGS hook.  When we switched
+	 to using rs6000_isa_flags, we need to do the initialization here.
 
-  /* If no -mcpu=<xxx>, inherit any default options that were cleared via
-     POWERPC_MASKS.  Originally, TARGET_DEFAULT was used to initialize
-     target_flags via the TARGET_DEFAULT_TARGET_FLAGS hook.  When we switched
-     to using rs6000_isa_flags, we need to do the initialization here.  */
-  if (!have_cpu)
-    rs6000_isa_flags |= (TARGET_DEFAULT & ~rs6000_isa_flags_explicit);
+	 If there is a TARGET_DEFAULT, use that.  Otherwise fall back to using
+	 -mcpu=powerpc, -mcpu=powerpc64, or -mcpu=powerpc64le defaults.  */
+      HOST_WIDE_INT flags = ((TARGET_DEFAULT) ? TARGET_DEFAULT
+			     : processor_target_table[cpu_index].target_enable);
+      rs6000_isa_flags |= (flags & ~rs6000_isa_flags_explicit);
+    }
 
   if (rs6000_tune_index >= 0)
     tune_index = rs6000_tune_index;
@@ -4214,12 +4227,8 @@ rs6000_option_override_internal (bool global_init_p)
      target_flags.  */
   rs6000_builtin_mask = rs6000_builtin_mask_calculate ();
   if (TARGET_DEBUG_BUILTIN || TARGET_DEBUG_TARGET)
-    {
-      fprintf (stderr,
-	       "new builtin mask = " HOST_WIDE_INT_PRINT_HEX ", ",
-	       rs6000_builtin_mask);
-      rs6000_print_builtin_options (stderr, 0, NULL, rs6000_builtin_mask);
-    }
+    rs6000_print_builtin_options (stderr, 0, "builtin mask",
+				  rs6000_builtin_mask);
 
   /* Initialize all of the registers.  */
   rs6000_init_hard_regno_mode_ok (global_init_p);