PR preprocessor/30805:

[pf3gnuchains/gcc-fork.git] / gcc / expr.h

diff --git a/gcc/expr.h b/gcc/expr.h
index 64604d7..f9532ec 100644 (file)
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -84,6 +84,13 @@ enum expand_modifier {EXPAND_NORMAL = 0, EXPAND_STACK_PARM, EXPAND_SUM,
 #define CLEAR_RATIO (optimize_size ? 3 : 15)
 #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 MOVE_RATIO
+#endif
 \f
 enum direction {none, upward, downward};
 
@@ -341,12 +348,13 @@ extern void expand_builtin_setjmp_setup (rtx, rtx);
 extern void expand_builtin_setjmp_receiver (rtx);
 extern rtx expand_builtin_saveregs (void);
 extern void expand_builtin_trap (void);
+extern rtx builtin_strncpy_read_str (void *, HOST_WIDE_INT, enum machine_mode);
 \f
 /* Functions from expr.c:  */
 
-/* This is run once per compilation to set up which modes can be used
-   directly in memory and to initialize the block move optab.  */
-extern void init_expr_once (void);
+/* This is run during target initialization to set up which modes can be 
+   used directly in memory and to initialize the block move optab.  */
+extern void init_expr_target (void);
 
 /* This is run at the start of compiling a function.  */
 extern void init_expr (void);
@@ -443,20 +451,23 @@ extern int can_move_by_pieces (unsigned HOST_WIDE_INT, unsigned int);
    CONSTFUN with several move instructions by store_by_pieces
    function.  CONSTFUNDATA is a pointer which will be passed as argument
    in every CONSTFUN call.
-   ALIGN is maximum alignment we can assume.  */
+   ALIGN is maximum alignment we can assume.
+   MEMSETP is true if this is a real memset/bzero, not a copy
+   of a const string.  */
 extern int can_store_by_pieces (unsigned HOST_WIDE_INT,
                                rtx (*) (void *, HOST_WIDE_INT,
                                         enum machine_mode),
-                               void *, unsigned int);
+                               void *, unsigned int, bool);
 
 /* Generate several move instructions to store LEN bytes generated by
    CONSTFUN to block TO.  (A MEM rtx with BLKmode).  CONSTFUNDATA is a
    pointer which will be passed as argument in every CONSTFUN call.
    ALIGN is maximum alignment we can assume.
+   MEMSETP is true if this is a real memset/bzero, not a copy.
    Returns TO + LEN.  */
 extern rtx store_by_pieces (rtx, unsigned HOST_WIDE_INT,
                            rtx (*) (void *, HOST_WIDE_INT, enum machine_mode),
-                           void *, unsigned int, int);
+                           void *, unsigned int, bool, int);
 
 /* Emit insns to set X from Y.  */
 extern rtx emit_move_insn (rtx, rtx);
@@ -567,7 +578,7 @@ extern HOST_WIDE_INT int_expr_size (tree);
 
 /* Return an rtx that refers to the value returned by a function
    in its original home.  This becomes invalid if any more code is emitted.  */
-extern rtx hard_function_value (tree, tree, tree, int);
+extern rtx hard_function_value (const_tree, const_tree, const_tree, int);
 
 extern rtx prepare_call_address (rtx, rtx, rtx *, int, int);
 
@@ -688,7 +699,7 @@ extern rtx force_reg (enum machine_mode, rtx);
 extern rtx force_not_mem (rtx);
 
 /* Return mode and signedness to use when object is promoted.  */
-extern enum machine_mode promote_mode (tree, enum machine_mode, int *, int);
+extern enum machine_mode promote_mode (const_tree, enum machine_mode, int *, int);
 
 /* Remove some bytes from the stack.  An rtx says how many.  */
 extern void adjust_stack (rtx);
@@ -740,7 +751,7 @@ extern rtx expand_mult (enum machine_mode, rtx, rtx, rtx, int);
 extern rtx expand_mult_highpart_adjust (enum machine_mode, rtx, rtx, rtx, rtx, int);
 
 extern rtx assemble_static_space (unsigned HOST_WIDE_INT);
-extern int safe_from_p (rtx, tree, int);
+extern int safe_from_p (const_rtx, tree, int);
 
 /* Call this once to initialize the contents of the optabs
    appropriately for the current target machine.  */