builtins.def (BUILT_IN_ALLOCA): Remove "#if SMALL_STACK" form.

	* builtins.def (BUILT_IN_ALLOCA): Remove "#if SMALL_STACK" form.
	* system.h (SMALL_STACK): Poison obsolete target macro.
	* doc/tm.texi (SMALL_STACK): Remove target macro documentation.

From-SVN: r69609

gcc/ChangeLog

+2003-07-20  Roger Sayle  <roger@eyesopen.com>
+
+	* builtins.def (BUILT_IN_ALLOCA): Remove "#if SMALL_STACK" form.
+	* system.h (SMALL_STACK): Poison obsolete target macro.
+	* doc/tm.texi (SMALL_STACK): Remove target macro documentation.
+
 2003-07-20  Phil Edwards  <pme@gcc.gnu.org>
 
 	* configure.in:  Cache the results of testing for cmp's capabilities.

gcc/builtins.def

@@ -140,19 +140,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
   DEF_BUILTIN (ENUM, NAME, BUILT_IN_FRONTEND, TYPE, TYPE,	\
 	       true, true, true, ATTRS, true)
 
-/* If SMALL_STACK is defined, then `alloca' is only defined in its
-   `__builtin' form.  */
-#if SMALL_STACK  
-DEF_FALLBACK_BUILTIN(BUILT_IN_ALLOCA,
-		     "__builtin_alloca",
-		     BT_FN_PTR_SIZE,
-		     ATTR_MALLOC_NOTHROW_LIST)
-#else
 DEF_EXT_LIB_BUILTIN(BUILT_IN_ALLOCA,
 		    "__builtin_alloca",
 		    BT_FN_PTR_SIZE,
 		    ATTR_MALLOC_NOTHROW_LIST)
-#endif
 
 DEF_LIB_BUILTIN(BUILT_IN_ABS,
 		"__builtin_abs",

gcc/doc/tm.texi

@@ -2936,12 +2936,6 @@ want to support call frame debugging information like that provided by
 DWARF 2.
 @end defmac
 
-@defmac SMALL_STACK
-Define this macro if the stack size for the target is very small.  This
-has the effect of disabling gcc's built-in @samp{alloca}, though
-@samp{__builtin_alloca} is not affected.
-@end defmac
-
 @node Exception Handling
 @subsection Exception Handling Support
 @cindex exception handling

gcc/system.h

@@ -592,7 +592,7 @@ typedef char _Bool;
    headers and were not used, and may be obsolete or may never have
    been used.  */
  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES	   \
-	ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT		   \
+	ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 	DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 	OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR			   \
 	LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC	   \