* target-def.h (TARGET_MUST_PASS_IN_STACK): New.

[pf3gnuchains/gcc-fork.git] / gcc / config / i386 / i386.c

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 7d7312c..9b6e30e 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -928,6 +928,7 @@ static int extended_reg_mentioned_1 (rtx *, void *);
 static bool ix86_rtx_costs (rtx, int, int, int *);
 static int min_insn_size (rtx);
 static tree ix86_md_asm_clobbers (tree clobbers);
+static bool ix86_must_pass_in_stack (enum machine_mode mode, tree type);
 
 #if defined (DO_GLOBAL_CTORS_BODY) && defined (HAS_INIT_SECTION)
 static void ix86_svr3_asm_out_constructor (rtx, int);
@@ -1071,6 +1072,8 @@ static void init_ext_80387_constants (void);
 #define TARGET_STRUCT_VALUE_RTX ix86_struct_value_rtx
 #undef TARGET_SETUP_INCOMING_VARARGS
 #define TARGET_SETUP_INCOMING_VARARGS ix86_setup_incoming_varargs
+#undef TARGET_MUST_PASS_IN_STACK
+#define TARGET_MUST_PASS_IN_STACK ix86_must_pass_in_stack
 
 #undef TARGET_GIMPLIFY_VA_ARG_EXPR
 #define TARGET_GIMPLIFY_VA_ARG_EXPR ix86_gimplify_va_arg
@@ -1097,6 +1100,8 @@ void
 override_options (void)
 {
   int i;
+  int ix86_tune_defaulted = 0;
+
   /* Comes from final.c -- no real reason to change it.  */
 #define MAX_CODE_ALIGN 16
 
@@ -1221,7 +1226,10 @@ override_options (void)
   if (!ix86_tune_string && ix86_arch_string)
     ix86_tune_string = ix86_arch_string;
   if (!ix86_tune_string)
-    ix86_tune_string = cpu_names [TARGET_CPU_DEFAULT];
+    {
+      ix86_tune_string = cpu_names [TARGET_CPU_DEFAULT];
+      ix86_tune_defaulted = 1;
+    }
   if (!ix86_arch_string)
     ix86_arch_string = TARGET_64BIT ? "x86-64" : "i386";
 
@@ -1293,7 +1301,20 @@ override_options (void)
        if (processor_alias_table[i].flags & PTA_PREFETCH_SSE)
          x86_prefetch_sse = true;
        if (TARGET_64BIT && !(processor_alias_table[i].flags & PTA_64BIT))
-         error ("CPU you selected does not support x86-64 instruction set");
+         {
+           if (ix86_tune_defaulted)
+             {
+               ix86_tune_string = "x86-64";
+               for (i = 0; i < pta_size; i++)
+                 if (! strcmp (ix86_tune_string,
+                               processor_alias_table[i].name))
+                   break;
+               ix86_tune = processor_alias_table[i].processor;
+             }
+           else
+             error ("CPU you selected does not support x86-64 "
+                    "instruction set");
+         }
        break;
       }
 
@@ -1887,6 +1908,16 @@ ix86_function_arg_regno_p (int regno)
   return false;
 }
 
+/* Return if we do not know how to pass TYPE solely in registers.  */
+
+static bool
+ix86_must_pass_in_stack (enum machine_mode mode, tree type)
+{
+  if (must_pass_in_stack_var_size_or_pad (mode, type))
+    return true;
+  return (!TARGET_64BIT && type && mode == TImode);
+}
+
 /* Initialize a variable CUM of type CUMULATIVE_ARGS
    for a call to a function whose data type is FNTYPE.
    For a library call, FNTYPE is 0.  */
@@ -2042,7 +2073,7 @@ classify_argument (enum machine_mode mode, tree type,
     return 0;
 
   if (mode != VOIDmode
-      && MUST_PASS_IN_STACK (mode, type))
+      && targetm.calls.must_pass_in_stack (mode, type))
     return 0;
 
   if (type && AGGREGATE_TYPE_P (type))
@@ -15830,15 +15861,6 @@ x86_emit_floatuns (rtx operands[2])
   emit_label (donelab);
 }
 
-/* Return if we do not know how to pass TYPE solely in registers.  */
-bool
-ix86_must_pass_in_stack (enum machine_mode mode, tree type)
-{
-   if (default_must_pass_in_stack (mode, type))
-     return true;
-   return (!TARGET_64BIT && type && mode == TImode);
-}
-
 /* Initialize vector TARGET via VALS.  */
 void
 ix86_expand_vector_init (rtx target, rtx vals)