2008-05-23 Rafael Espindola <espindola@google.com>

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

diff --git a/gcc/expr.h b/gcc/expr.h
index 242329a..beb44bd 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};
 
@@ -345,9 +352,9 @@ 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);
@@ -444,20 +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);
@@ -510,8 +520,6 @@ expand_normal (tree exp)
   return expand_expr_real (exp, NULL_RTX, VOIDmode, EXPAND_NORMAL, NULL);
 }
 
-extern void expand_var (tree);
-
 /* At the start of a function, record that we have no previously-pushed
    arguments waiting to be popped.  */
 extern void init_pending_stack_adjust (void);
@@ -547,7 +555,7 @@ extern void do_compare_rtx_and_jump (rtx, rtx, enum rtx_code, int,
                                     enum machine_mode, rtx, rtx, rtx);
 
 /* Two different ways of generating switch statements.  */
-extern int try_casesi (tree, tree, tree, tree, rtx, rtx);
+extern int try_casesi (tree, tree, tree, tree, rtx, rtx, rtx);
 extern int try_tablejump (tree, tree, tree, tree, rtx, rtx);
 
 /* Smallest number of adjacent cases before we use a jump table.
@@ -606,9 +614,6 @@ extern rtx eliminate_constant_term (rtx, rtx *);
    by emitting insns to perform arithmetic if nec.  */
 extern rtx memory_address (enum machine_mode, rtx);
 
-/* Like `memory_address' but pretend `flag_force_addr' is 0.  */
-extern rtx memory_address_noforce (enum machine_mode, rtx);
-
 /* Return a memory reference like MEMREF, but with its mode changed
    to MODE and its address changed to ADDR.
    (VOIDmode means don't change the mode.
@@ -737,6 +742,7 @@ extern void store_bit_field (rtx, unsigned HOST_WIDE_INT,
 extern rtx extract_bit_field (rtx, unsigned HOST_WIDE_INT,
                              unsigned HOST_WIDE_INT, int, rtx,
                              enum machine_mode, enum machine_mode);
+extern rtx extract_low_bits (enum machine_mode, enum machine_mode, rtx);
 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);