PR debug/46307

[pf3gnuchains/gcc-fork.git] / gcc / targhooks.c

diff --git a/gcc/targhooks.c b/gcc/targhooks.c
index dd22bea..3647436 100644 (file)
--- a/gcc/targhooks.c
+++ b/gcc/targhooks.c
@@ -64,6 +64,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "target-def.h"
 #include "ggc.h"
 #include "hard-reg-set.h"
+#include "regs.h"
 #include "reload.h"
 #include "optabs.h"
 #include "recog.h"
@@ -424,6 +425,19 @@ default_scalar_mode_supported_p (enum machine_mode mode)
     }
 }
 
+/* Make some target macros useable by target-independent code.  */
+bool
+targhook_words_big_endian (void)
+{
+  return !!WORDS_BIG_ENDIAN;
+}
+
+bool
+targhook_float_words_big_endian (void)
+{
+  return !!FLOAT_WORDS_BIG_ENDIAN;
+}
+
 /* True if the target supports decimal floating point.  */
 
 bool
@@ -979,10 +993,19 @@ default_builtin_support_vector_misalignment (enum machine_mode mode,
 /* By default, only attempt to parallelize bitwise operations, and
    possibly adds/subtracts using bit-twiddling.  */
 
+enum machine_mode
+default_preferred_simd_mode (enum machine_mode mode ATTRIBUTE_UNUSED)
+{
+  return word_mode;
+}
+
+/* By default only the size derived from the preferred vector mode
+   is tried.  */
+
 unsigned int
-default_units_per_simd_word (enum machine_mode mode ATTRIBUTE_UNUSED)
+default_autovectorize_vector_sizes (void)
 {
-  return UNITS_PER_WORD;
+  return 0;
 }
 
 /* Determine whether or not a pointer mode is valid. Assume defaults
@@ -1221,16 +1244,121 @@ default_profile_before_prologue (void)
 #endif
 }
 
+/* The default implementation of TARGET_PREFERRED_RELOAD_CLASS.  */
+
+reg_class_t
+default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED,
+                               reg_class_t rclass)
+{
+#ifdef PREFERRED_RELOAD_CLASS 
+  return (reg_class_t) PREFERRED_RELOAD_CLASS (x, (enum reg_class) rclass);
+#else
+  return rclass;
+#endif
+}
+
+/* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS.  */
+
+reg_class_t
+default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED,
+                                      reg_class_t rclass)
+{
+#ifdef PREFERRED_OUTPUT_RELOAD_CLASS
+  return PREFERRED_OUTPUT_RELOAD_CLASS (x, (enum reg_class) rclass);
+#else
+  return rclass;
+#endif
+}
+
 /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P.  */
 
 bool
 default_class_likely_spilled_p (reg_class_t rclass)
 {
-#ifndef CLASS_LIKELY_SPILLED_P
   return (reg_class_size[(int) rclass] == 1);
-#else
-  return CLASS_LIKELY_SPILLED_P ((enum reg_class) rclass);
+}
+
+/* Determine the debugging unwind mechanism for the target.  */
+
+enum unwind_info_type
+default_debug_unwind_info (void)
+{
+  /* If the target wants to force the use of dwarf2 unwind info, let it.  */
+  /* ??? Change all users to the hook, then poison this.  */
+#ifdef DWARF2_FRAME_INFO
+  if (DWARF2_FRAME_INFO)
+    return UI_DWARF2;
+#endif
+
+  /* Otherwise, only turn it on if dwarf2 debugging is enabled.  */
+#ifdef DWARF2_DEBUGGING_INFO
+  if (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
+    return UI_DWARF2;
 #endif
+
+  return UI_NONE;
 }
 
+/* Determine the exception handling mechanism for the target.  */
+
+enum unwind_info_type
+default_except_unwind_info (void)
+{
+  /* ??? Change the one user to the hook, then poison this.  */
+#ifdef MUST_USE_SJLJ_EXCEPTIONS
+  if (MUST_USE_SJLJ_EXCEPTIONS)
+    return UI_SJLJ;
+#endif
+
+  /* Obey the configure switch to turn on sjlj exceptions.  */
+#ifdef CONFIG_SJLJ_EXCEPTIONS
+  if (CONFIG_SJLJ_EXCEPTIONS)
+    return UI_SJLJ;
+#endif
+
+  /* ??? Change all users to the hook, then poison this.  */
+#ifdef DWARF2_UNWIND_INFO
+  if (DWARF2_UNWIND_INFO)
+    return UI_DWARF2;
+#endif
+
+  return UI_SJLJ;
+}
+
+/* To be used by targets that force dwarf2 unwind enabled.  */
+
+enum unwind_info_type
+dwarf2_except_unwind_info (void)
+{
+  /* Obey the configure switch to turn on sjlj exceptions.  */
+#ifdef CONFIG_SJLJ_EXCEPTIONS
+  if (CONFIG_SJLJ_EXCEPTIONS)
+    return UI_SJLJ;
+#endif
+
+  return UI_DWARF2;
+}
+
+/* To be used by targets that force sjlj unwind enabled.  */
+
+enum unwind_info_type
+sjlj_except_unwind_info (void)
+{
+  return UI_SJLJ;
+}
+
+/* To be used by targets where reg_raw_mode doesn't return the right
+   mode for registers used in apply_builtin_return and apply_builtin_arg.  */
+
+enum machine_mode
+default_get_reg_raw_mode(int regno)
+{
+  return reg_raw_mode[regno];
+}
+
+const struct default_options empty_optimization_table[] =
+  {
+    { OPT_LEVELS_NONE, 0, NULL, 0 }
+  };
+
 #include "gt-targhooks.h"