* mkconfig.sh: Include insn-flags.h and insn-constants.h before

	defaults.h.
	* except.h: Move MUST_USE_SJLJ_EXCEPTIONS and USING_SJLJ_EXCEPTIONS
	to defaults.h
	* expr.h (BRANCH_COST, MOVE_RATIO, CLEAR_RATIO, SET_RATIO,
	DEFAULT_FUNCTION_ARG_PADDING, FUNCTION_ARG_PADDING,
	FUNCTION_ARG_BOUNDARY, STACK_SAVEAREA_MODE, STACK_SIZE_MODE,
	STACK_CHECK_BUILTIN, STACK_CHECK_STATIC_BUILTIN,
	STACK_CHECK_PROBE_INTERVAL_EXP, STACK_CHECK_MOVING_SP,
	STACK_OLD_CHECK_PROTECT, STACK_CHECK_PROTECT,
	STACK_CHECK_MAX_FRAME_SIZE, STACK_CHECK_FIXED_FRAME_SIZE,
	STACK_CHECK_MAX_VAR_SIZE): Move target macro defaults to defaults.h.
	* defaults.h: Updated for above mentioned changes.



git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@160195 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 201 insertions, 0 deletions

diff --git a/gcc/defaults.h b/gcc/defaults.h
index 26f90edf3fb..97fdcdd7ce4 100644
--- a/gcc/defaults.h
+++ b/gcc/defaults.h
@@ -1165,4 +1165,205 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
 #endif
 
+
+#ifdef GCC_INSN_FLAGS_H
+/* Dependent default target macro definitions
+
+   This section of defaults.h defines target macros that depend on generated
+   headers.  This is a bit awkward:  We want to put all default definitions
+   for target macros in defaults.h, but some of the defaults depend on the
+   HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
+   included by files that do include defaults.h.
+
+   Fortunately, the default macro definitions that depend on the HAVE_*
+   macros are also the ones that will only be used inside GCC itself, i.e.
+   not in the gen* programs or in target objects like libgcc.
+
+   Obviously, it would be best to keep this section of defaults.h as small
+   as possible, by converting the macros defined below to target hooks or
+   functions.
+*/
+
+/* Just because the user configured --with-sjlj-exceptions=no doesn't
+   mean that we can use call frame exceptions.  Detect that the target
+   has appropriate support.  */
+
+#ifndef MUST_USE_SJLJ_EXCEPTIONS
+# if defined (EH_RETURN_DATA_REGNO)			\
+       && (defined (TARGET_UNWIND_INFO)			\
+	   || (DWARF2_UNWIND_INFO			\
+	       && (defined (EH_RETURN_HANDLER_RTX)	\
+		   || defined (HAVE_eh_return))))
+#  define MUST_USE_SJLJ_EXCEPTIONS	0
+# else
+#  define MUST_USE_SJLJ_EXCEPTIONS	1
+# endif
+#endif
+
+#ifdef CONFIG_SJLJ_EXCEPTIONS
+# if CONFIG_SJLJ_EXCEPTIONS == 1
+#  define USING_SJLJ_EXCEPTIONS		1
+# endif
+# if CONFIG_SJLJ_EXCEPTIONS == 0
+#  define USING_SJLJ_EXCEPTIONS		0
+#  if !defined(EH_RETURN_DATA_REGNO)
+    #error "EH_RETURN_DATA_REGNO required"
+#  endif
+#  if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO)
+    #error "{DWARF2,TARGET}_UNWIND_INFO required"
+#  endif
+#  if !defined(TARGET_UNWIND_INFO) \
+	&& !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return))
+    #error "EH_RETURN_HANDLER_RTX or eh_return required"
+#  endif
+/* Usually the above error checks will have already triggered an
+   error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own
+   reasons.  */
+#  if MUST_USE_SJLJ_EXCEPTIONS
+    #error "Must use SJLJ exceptions but configured not to"
+#  endif
+# endif
+#else
+# define USING_SJLJ_EXCEPTIONS		MUST_USE_SJLJ_EXCEPTIONS
+#endif
+
+/* The default branch cost is 1.  */
+#ifndef BRANCH_COST
+#define BRANCH_COST(speed_p, predictable_p) 1
+#endif
+
+/* If a memory-to-memory move would take MOVE_RATIO or more simple
+   move-instruction sequences, we will do a movmem or libcall instead.  */
+
+#ifndef MOVE_RATIO
+#if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
+#define MOVE_RATIO(speed) 2
+#else
+/* If we are optimizing for space (-Os), cut down the default move ratio.  */
+#define MOVE_RATIO(speed) ((speed) ? 15 : 3)
+#endif
+#endif
+
+/* If a clear memory operation would take CLEAR_RATIO or more simple
+   move-instruction sequences, we will do a setmem or libcall instead.  */
+
+#ifndef CLEAR_RATIO
+#if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
+#define CLEAR_RATIO(speed) 2
+#else
+/* If we are optimizing for space, cut down the default clear ratio.  */
+#define CLEAR_RATIO(speed) ((speed) ? 15 :3)
+#endif
+#endif
+
+/* If a memory set (to value other than zero) operation would take
+   SET_RATIO or more simple move-instruction sequences, we will do a movmem
+   or libcall instead.  */
+#ifndef SET_RATIO
+#define SET_RATIO(speed) MOVE_RATIO(speed)
+#endif
+
+/* Supply a default definition for FUNCTION_ARG_PADDING:
+   usually pad upward, but pad short args downward on
+   big-endian machines.  */
+
+#define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)			\
+  (! BYTES_BIG_ENDIAN							\
+   ? upward								\
+   : (((MODE) == BLKmode						\
+       ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST		\
+	  && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
+       : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)			\
+      ? downward : upward))
+
+#ifndef FUNCTION_ARG_PADDING
+#define FUNCTION_ARG_PADDING(MODE, TYPE)	\
+  DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
+#endif
+
+/* Supply a default definition for FUNCTION_ARG_BOUNDARY.  Normally, we let
+   FUNCTION_ARG_PADDING, which also pads the length, handle any needed
+   alignment.  */
+
+#ifndef FUNCTION_ARG_BOUNDARY
+#define FUNCTION_ARG_BOUNDARY(MODE, TYPE)	PARM_BOUNDARY
+#endif
+
+/* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
+   Normally move_insn, so Pmode stack pointer.  */
+
+#ifndef STACK_SAVEAREA_MODE
+#define STACK_SAVEAREA_MODE(LEVEL) Pmode
+#endif
+
+/* Supply a default definition of STACK_SIZE_MODE for
+   allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
+
+#ifndef STACK_SIZE_MODE
+#define STACK_SIZE_MODE word_mode
+#endif
+
+/* Provide default values for the macros controlling stack checking.  */
+
+/* The default is neither full builtin stack checking...  */
+#ifndef STACK_CHECK_BUILTIN
+#define STACK_CHECK_BUILTIN 0
+#endif
+
+/* ...nor static builtin stack checking.  */
+#ifndef STACK_CHECK_STATIC_BUILTIN
+#define STACK_CHECK_STATIC_BUILTIN 0
+#endif
+
+/* The default interval is one page (4096 bytes).  */
+#ifndef STACK_CHECK_PROBE_INTERVAL_EXP
+#define STACK_CHECK_PROBE_INTERVAL_EXP 12
+#endif
+
+/* The default is not to move the stack pointer.  */
+#ifndef STACK_CHECK_MOVING_SP
+#define STACK_CHECK_MOVING_SP 0
+#endif
+
+/* This is a kludge to try to capture the discrepancy between the old
+   mechanism (generic stack checking) and the new mechanism (static
+   builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
+   for the latter because part of the protection area is effectively
+   included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
+#ifdef STACK_CHECK_PROTECT
+#define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
+#else
+#define STACK_OLD_CHECK_PROTECT \
+ (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 8 * 1024)
+#endif
+
+/* Minimum amount of stack required to recover from an anticipated stack
+   overflow detection.  The default value conveys an estimate of the amount
+   of stack required to propagate an exception.  */
+#ifndef STACK_CHECK_PROTECT
+#define STACK_CHECK_PROTECT \
+ (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 12 * 1024)
+#endif
+
+/* Make the maximum frame size be the largest we can and still only need
+   one probe per function.  */
+#ifndef STACK_CHECK_MAX_FRAME_SIZE
+#define STACK_CHECK_MAX_FRAME_SIZE \
+  ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
+#endif
+
+/* This is arbitrary, but should be large enough everywhere.  */
+#ifndef STACK_CHECK_FIXED_FRAME_SIZE
+#define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
+#endif
+
+/* Provide a reasonable default for the maximum size of an object to
+   allocate in the fixed frame.  We may need to be able to make this
+   controllable by the user at some point.  */
+#ifndef STACK_CHECK_MAX_VAR_SIZE
+#define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
+#endif
+
+#endif /* GCC_INSN_FLAGS_H  */
+
 #endif  /* ! GCC_DEFAULTS_H */