gcc-7.1.0gcc-7.1.0

1 files changed, 39 insertions, 19 deletions

diff --git a/gcc/expr.h b/gcc/expr.h
index c5b302a383..84002abb02 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -1,5 +1,5 @@
 /* Definitions for code generation pass of GNU compiler.
-   Copyright (C) 1987-2016 Free Software Foundation, Inc.
+   Copyright (C) 1987-2017 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -71,8 +71,29 @@ extern rtx convert_to_mode (machine_mode, rtx, int);
 /* Convert an rtx to MODE from OLDMODE and return the result.  */
 extern rtx convert_modes (machine_mode, machine_mode, rtx, int);
 
-/* Emit code to move a block Y to a block X.  */
+/* Expand a call to memcpy or memmove or memcmp, and return the result.  */
+extern rtx emit_block_op_via_libcall (enum built_in_function, rtx, rtx, rtx,
+				      bool);
+
+static inline rtx
+emit_block_copy_via_libcall (rtx dst, rtx src, rtx size, bool tailcall = false)
+{
+  return emit_block_op_via_libcall (BUILT_IN_MEMCPY, dst, src, size, tailcall);
+}
+
+static inline rtx
+emit_block_move_via_libcall (rtx dst, rtx src, rtx size, bool tailcall = false)
+{
+  return emit_block_op_via_libcall (BUILT_IN_MEMMOVE, dst, src, size, tailcall);
+}
 
+static inline rtx
+emit_block_comp_via_libcall (rtx dst, rtx src, rtx size, bool tailcall = false)
+{
+  return emit_block_op_via_libcall (BUILT_IN_MEMCMP, dst, src, size, tailcall);
+}
+
+/* Emit code to move a block Y to a block X.  */
 enum block_op_methods
 {
   BLOCK_OP_NORMAL,
@@ -82,17 +103,16 @@ enum block_op_methods
   BLOCK_OP_TAILCALL
 };
 
-extern GTY(()) tree block_clear_fn;
-extern void init_block_move_fn (const char *);
-extern void init_block_clear_fn (const char *);
+typedef rtx (*by_pieces_constfn) (void *, HOST_WIDE_INT, machine_mode);
 
 extern rtx emit_block_move (rtx, rtx, rtx, enum block_op_methods);
-extern rtx emit_block_move_via_libcall (rtx, rtx, rtx, bool);
 extern rtx emit_block_move_hints (rtx, rtx, rtx, enum block_op_methods,
 			          unsigned int, HOST_WIDE_INT,
 				  unsigned HOST_WIDE_INT,
 				  unsigned HOST_WIDE_INT,
 				  unsigned HOST_WIDE_INT);
+extern rtx emit_block_cmp_hints (rtx, rtx, rtx, tree, rtx, bool,
+				 by_pieces_constfn, void *);
 extern bool emit_storent_insn (rtx to, rtx from);
 
 /* Copy all or part of a value X into registers starting at REGNO.
@@ -126,9 +146,6 @@ extern void emit_group_store (rtx, rtx, tree, int);
 
 extern rtx maybe_emit_group_store (rtx, tree);
 
-/* Copy BLKmode object from a set of registers.  */
-extern void copy_blkmode_from_reg (rtx, rtx, tree);
-
 /* Mark REG as holding a parameter for the next CALL_INSN.
    Mode is TYPE_MODE of the non-promoted parameter, or VOIDmode.  */
 extern void use_reg_mode (rtx *, rtx, machine_mode);
@@ -157,6 +174,11 @@ extern void use_regs (rtx *, int, int);
 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN.  */
 extern void use_group_regs (rtx *, rtx);
 
+#ifdef GCC_INSN_CODES_H
+extern rtx expand_cmpstrn_or_cmpmem (insn_code, rtx, rtx, rtx, tree, rtx,
+				     HOST_WIDE_INT);
+#endif
+
 /* Write zeros through the storage of OBJECT.
    If OBJECT has BLKmode, SIZE is its length in bytes.  */
 extern rtx clear_storage (rtx, rtx, enum block_op_methods);
@@ -166,7 +188,7 @@ extern rtx clear_storage_hints (rtx, rtx, enum block_op_methods,
 				unsigned HOST_WIDE_INT,
 				unsigned HOST_WIDE_INT);
 /* The same, but always output an library call.  */
-rtx set_storage_via_libcall (rtx, rtx, rtx, bool);
+extern rtx set_storage_via_libcall (rtx, rtx, rtx, bool = false);
 
 /* Expand a setmem pattern; return true if successful.  */
 extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int,
@@ -175,10 +197,6 @@ extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int,
 				    unsigned HOST_WIDE_INT,
 				    unsigned HOST_WIDE_INT);
 
-extern unsigned HOST_WIDE_INT move_by_pieces_ninsns (unsigned HOST_WIDE_INT,
-						     unsigned int,
-						     unsigned int);
-
 /* Return nonzero if it is desirable to store LEN bytes generated by
    CONSTFUN with several move instructions by store_by_pieces
    function.  CONSTFUNDATA is a pointer which will be passed as argument
@@ -187,8 +205,7 @@ extern unsigned HOST_WIDE_INT move_by_pieces_ninsns (unsigned HOST_WIDE_INT,
    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,
-					 machine_mode),
+				by_pieces_constfn,
 				void *, unsigned int, bool);
 
 /* Generate several move instructions to store LEN bytes generated by
@@ -197,8 +214,7 @@ extern int can_store_by_pieces (unsigned HOST_WIDE_INT,
    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, machine_mode),
+extern rtx store_by_pieces (rtx, unsigned HOST_WIDE_INT, by_pieces_constfn,
 			    void *, unsigned int, bool, int);
 
 /* Emit insns to set X from Y.  */
@@ -223,6 +239,10 @@ extern rtx push_block (rtx, int, int);
 extern bool emit_push_insn (rtx, machine_mode, tree, rtx, unsigned int,
 			    int, rtx, int, rtx, rtx, int, rtx, bool);
 
+/* Extract the accessible bit-range from a COMPONENT_REF.  */
+extern void get_bit_range (unsigned HOST_WIDE_INT *, unsigned HOST_WIDE_INT *,
+			   tree, HOST_WIDE_INT *, tree *);
+
 /* Expand an assignment that stores the value of FROM into TO.  */
 extern void expand_assignment (tree, tree, bool);
 
@@ -279,7 +299,7 @@ rtx get_personality_function (tree);
 /* Determine whether the LEN bytes can be moved by using several move
    instructions.  Return nonzero if a call to move_by_pieces should
    succeed.  */
-extern int can_move_by_pieces (unsigned HOST_WIDE_INT, unsigned int);
+extern bool can_move_by_pieces (unsigned HOST_WIDE_INT, unsigned int);
 
 extern unsigned HOST_WIDE_INT highest_pow2_factor (const_tree);