exp = TREE_OPERAND (exp, 0);
if (TREE_CODE (exp) == ADDR_EXPR)
- {
- exp = TREE_OPERAND (exp, 0);
- set_mem_attributes (mem, exp, 0);
- }
+ exp = TREE_OPERAND (exp, 0);
else if (POINTER_TYPE_P (TREE_TYPE (exp)))
+ exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp);
+ else
+ exp = NULL;
+
+ /* Honor attributes derived from exp, except for the alias set
+ (as builtin stringops may alias with anything) and the size
+ (as stringops may access multiple array elements). */
+ if (exp)
{
- exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp);
- /* memcpy, memset and other builtin stringops can alias with anything. */
+ set_mem_attributes (mem, exp, 0);
set_mem_alias_set (mem, 0);
+ set_mem_size (mem, NULL_RTX);
}
return mem;
/* Now that we are assured of success, expand the source. */
start_sequence ();
- pat = memory_address (BLKmode,
- expand_expr (src, src_reg, ptr_mode, EXPAND_SUM));
+ pat = expand_expr (src, src_reg, ptr_mode, EXPAND_NORMAL);
if (pat != src_reg)
emit_move_insn (src_reg, pat);
pat = get_insns ();
static rtx
expand_builtin_strstr (tree arglist, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn, tmp;
- const char *p1, *p2;
-
- p2 = c_getstr (s2);
- if (p2 == NULL)
- return 0;
-
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- const char *r = strstr (p1, p2);
-
- if (r == NULL)
- return const0_rtx;
-
- /* Return an offset into the constant string argument. */
- tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
- fold_convert (TREE_TYPE (s1),
- ssize_int (r - p1))));
- return expand_expr (tmp, target, mode, EXPAND_NORMAL);
- }
-
- if (p2[0] == '\0')
- return expand_expr (s1, target, mode, EXPAND_NORMAL);
-
- if (p2[1] != '\0')
- return 0;
-
- fn = implicit_built_in_decls[BUILT_IN_STRCHR];
- if (!fn)
- return 0;
-
- /* New argument list transforming strstr(s1, s2) to
- strchr(s1, s2[0]). */
- arglist = build_tree_list (NULL_TREE,
- build_int_cst (NULL_TREE, p2[0]));
- arglist = tree_cons (NULL_TREE, s1, arglist);
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
+ tree result = fold_builtin_strstr (arglist);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return 0;
}
/* Expand a call to the strchr builtin. Return 0 if we failed the
static rtx
expand_builtin_strchr (tree arglist, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- const char *p1;
-
- if (TREE_CODE (s2) != INTEGER_CST)
- return 0;
-
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- char c;
- const char *r;
- tree tmp;
-
- if (target_char_cast (s2, &c))
- return 0;
+ tree result = fold_builtin_strchr (arglist);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
- r = strchr (p1, c);
-
- if (r == NULL)
- return const0_rtx;
-
- /* Return an offset into the constant string argument. */
- tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
- fold_convert (TREE_TYPE (s1),
- ssize_int (r - p1))));
- return expand_expr (tmp, target, mode, EXPAND_NORMAL);
- }
-
- /* FIXME: Should use here strchrM optab so that ports can optimize
- this. */
- return 0;
+ /* FIXME: Should use strchrM optab so that ports can optimize this. */
}
+ return 0;
}
/* Expand a call to the strrchr builtin. Return 0 if we failed the
static rtx
expand_builtin_strrchr (tree arglist, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn, tmp;
- const char *p1;
-
- if (TREE_CODE (s2) != INTEGER_CST)
- return 0;
-
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- char c;
- const char *r;
-
- if (target_char_cast (s2, &c))
- return 0;
-
- r = strrchr (p1, c);
-
- if (r == NULL)
- return const0_rtx;
-
- /* Return an offset into the constant string argument. */
- tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
- fold_convert (TREE_TYPE (s1),
- ssize_int (r - p1))));
- return expand_expr (tmp, target, mode, EXPAND_NORMAL);
- }
-
- if (! integer_zerop (s2))
- return 0;
-
- fn = implicit_built_in_decls[BUILT_IN_STRCHR];
- if (!fn)
- return 0;
-
- /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
+ tree result = fold_builtin_strrchr (arglist);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return 0;
}
/* Expand a call to the strpbrk builtin. Return 0 if we failed the
static rtx
expand_builtin_strpbrk (tree arglist, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn, tmp;
- const char *p1, *p2;
-
- p2 = c_getstr (s2);
- if (p2 == NULL)
- return 0;
-
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- const char *r = strpbrk (p1, p2);
-
- if (r == NULL)
- return const0_rtx;
-
- /* Return an offset into the constant string argument. */
- tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
- fold_convert (TREE_TYPE (s1),
- ssize_int (r - p1))));
- return expand_expr (tmp, target, mode, EXPAND_NORMAL);
- }
-
- if (p2[0] == '\0')
- {
- /* strpbrk(x, "") == NULL.
- Evaluate and ignore the arguments in case they had
- side-effects. */
- expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
-
- if (p2[1] != '\0')
- return 0; /* Really call strpbrk. */
-
- fn = implicit_built_in_decls[BUILT_IN_STRCHR];
- if (!fn)
- return 0;
-
- /* New argument list transforming strpbrk(s1, s2) to
- strchr(s1, s2[0]). */
- arglist = build_tree_list (NULL_TREE,
- build_int_cst (NULL_TREE, p2[0]));
- arglist = tree_cons (NULL_TREE, s1, arglist);
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
+ tree result = fold_builtin_strpbrk (arglist);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return 0;
}
/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
terminator. If the caller requested a mempcpy-like return value,
adjust it. */
if (endp == 1 && target != const0_rtx)
- emit_move_insn (target, plus_constant (gen_lowpart (GET_MODE (target),
- end), 1));
+ {
+ rtx tem = plus_constant (gen_lowpart (GET_MODE (target), end), 1);
+ emit_move_insn (target, force_operand (tem, NULL_RTX));
+ }
return target;
}
if (GET_MODE (target) != GET_MODE (ret))
ret = gen_lowpart (GET_MODE (target), ret);
- ret = emit_move_insn (target,
- plus_constant (ret,
- INTVAL (len_rtx)));
+ ret = plus_constant (ret, INTVAL (len_rtx));
+ ret = emit_move_insn (target, force_operand (ret, NULL_RTX));
gcc_assert (ret);
return target;
arg1_rtx = get_memory_rtx (arg1);
arg2_rtx = get_memory_rtx (arg2);
arg3_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
+
+ /* Set MEM_SIZE as appropriate. */
+ if (GET_CODE (arg3_rtx) == CONST_INT)
+ {
+ set_mem_size (arg1_rtx, arg3_rtx);
+ set_mem_size (arg2_rtx, arg3_rtx);
+ }
+
#ifdef HAVE_cmpmemsi
if (HAVE_cmpmemsi)
insn = gen_cmpmemsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
static rtx
expand_builtin_strncat (tree arglist, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist,
- POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (arglist,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
{
- tree dst = TREE_VALUE (arglist),
- src = TREE_VALUE (TREE_CHAIN (arglist)),
- len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
- const char *p = c_getstr (src);
-
- /* If the requested length is zero, or the src parameter string
- length is zero, return the dst parameter. */
- if (integer_zerop (len) || (p && *p == '\0'))
- {
- /* Evaluate and ignore the src and len parameters in case
- they have side-effects. */
- expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL);
- expand_expr (len, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return expand_expr (dst, target, mode, EXPAND_NORMAL);
- }
-
- /* If the requested len is greater than or equal to the string
- length, call strcat. */
- if (TREE_CODE (len) == INTEGER_CST && p
- && compare_tree_int (len, strlen (p)) >= 0)
- {
- tree newarglist
- = tree_cons (NULL_TREE, dst, build_tree_list (NULL_TREE, src));
- tree fn = implicit_built_in_decls[BUILT_IN_STRCAT];
-
- /* If the replacement _DECL isn't initialized, don't do the
- transformation. */
- if (!fn)
- return 0;
-
- return expand_expr (build_function_call_expr (fn, newarglist),
- target, mode, EXPAND_NORMAL);
- }
- return 0;
+ tree result = fold_builtin_strncat (arglist);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return 0;
}
/* Expand expression EXP, which is a call to the strspn builtin.
static rtx
expand_builtin_strspn (tree arglist, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
-
- /* If both arguments are constants, evaluate at compile-time. */
- if (p1 && p2)
- {
- const size_t r = strspn (p1, p2);
- return expand_expr (size_int (r), target, mode, EXPAND_NORMAL);
- }
-
- /* If either argument is "", return 0. */
- if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))
- {
- /* Evaluate and ignore both arguments in case either one has
- side-effects. */
- expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL);
- expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
- return 0;
+ tree result = fold_builtin_strspn (arglist);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return 0;
}
/* Expand expression EXP, which is a call to the strcspn builtin.
static rtx
expand_builtin_strcspn (tree arglist, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
-
- /* If both arguments are constants, evaluate at compile-time. */
- if (p1 && p2)
- {
- const size_t r = strcspn (p1, p2);
- return expand_expr (size_int (r), target, mode, EXPAND_NORMAL);
- }
-
- /* If the first argument is "", return 0. */
- if (p1 && *p1 == '\0')
- {
- /* Evaluate and ignore argument s2 in case it has
- side-effects. */
- expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
-
- /* If the second argument is "", return __builtin_strlen(s1). */
- if (p2 && *p2 == '\0')
- {
- tree newarglist = build_tree_list (NULL_TREE, s1),
- fn = implicit_built_in_decls[BUILT_IN_STRLEN];
-
- /* If the replacement _DECL isn't initialized, don't do the
- transformation. */
- if (!fn)
- return 0;
-
- return expand_expr (build_function_call_expr (fn, newarglist),
- target, mode, EXPAND_NORMAL);
- }
- return 0;
+ tree result = fold_builtin_strcspn (arglist);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return 0;
}
/* Expand a call to __builtin_saveregs, generating the result in TARGET,
static rtx
expand_builtin_fputs (tree arglist, rtx target, bool unlocked)
{
- tree len, fn;
- tree fn_fputc = unlocked ? implicit_built_in_decls[BUILT_IN_FPUTC_UNLOCKED]
- : implicit_built_in_decls[BUILT_IN_FPUTC];
- tree fn_fwrite = unlocked ? implicit_built_in_decls[BUILT_IN_FWRITE_UNLOCKED]
- : implicit_built_in_decls[BUILT_IN_FWRITE];
-
- /* If the return value is used, or the replacement _DECL isn't
- initialized, don't do the transformation. */
- if (target != const0_rtx || !fn_fputc || !fn_fwrite)
- return 0;
-
/* Verify the arguments in the original call. */
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
-
- /* Get the length of the string passed to fputs. If the length
- can't be determined, punt. */
- if (!(len = c_strlen (TREE_VALUE (arglist), 1))
- || TREE_CODE (len) != INTEGER_CST)
- return 0;
-
- switch (compare_tree_int (len, 1))
+ if (validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
{
- case -1: /* length is 0, delete the call entirely . */
- {
- /* Evaluate and ignore the argument in case it has
- side-effects. */
- expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), const0_rtx,
- VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
- case 0: /* length is 1, call fputc. */
- {
- const char *p = c_getstr (TREE_VALUE (arglist));
-
- if (p != NULL)
- {
- /* New argument list transforming fputs(string, stream) to
- fputc(string[0], stream). */
- arglist = build_tree_list (NULL_TREE,
- TREE_VALUE (TREE_CHAIN (arglist)));
- arglist = tree_cons (NULL_TREE,
- build_int_cst (NULL_TREE, p[0]),
- arglist);
- fn = fn_fputc;
- break;
- }
- }
- /* Fall through. */
- case 1: /* length is greater than 1, call fwrite. */
- {
- tree string_arg;
-
- /* If optimizing for size keep fputs. */
- if (optimize_size)
- return 0;
- string_arg = TREE_VALUE (arglist);
- /* New argument list transforming fputs(string, stream) to
- fwrite(string, 1, len, stream). */
- arglist = build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist)));
- arglist = tree_cons (NULL_TREE, len, arglist);
- arglist = tree_cons (NULL_TREE, size_one_node, arglist);
- arglist = tree_cons (NULL_TREE, string_arg, arglist);
- fn = fn_fwrite;
- break;
- }
- default:
- gcc_unreachable ();
+ tree result = fold_builtin_fputs (arglist, (target == const0_rtx),
+ unlocked, NULL_TREE);
+ if (result)
+ return expand_expr (result, target, VOIDmode, EXPAND_NORMAL);
}
-
- return expand_expr (build_function_call_expr (fn, arglist),
- const0_rtx, VOIDmode, EXPAND_NORMAL);
+ return 0;
}
/* Expand a call to __builtin_expect. We return our argument and emit a
}
}
-/* Simplify a call to the strstr builtin.
+/* Simplify a call to the strchr builtin.
Return 0 if no simplification was possible, otherwise return the
simplified form of the call as a tree.
return fold (build2 (PLUS_EXPR, TREE_TYPE (s1),
s1, build_int_cst (TREE_TYPE (s1), r - p1)));
}
-
- /* FIXME: Should use here strchrM optab so that ports can optimize
- this. */
return 0;
}
}
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