builtins.c (expand_builtin_strstr): New function.
* builtins.c (expand_builtin_strstr): New function. (expand_builtin): Handle BUILT_IN_STRSTR and BUILT_IN_STRCHR. * builtins.def (BUILT_IN_STRSTR, BUILT_IN_STRCHR): New entries. * c-common.c (c_common_nodes_and_builtins): Declare builtin strstr and builtin strchr. From-SVN: r37181
This commit is contained in:
Kaveh R. Ghazi
Kaveh Ghazi
parent
9f56c00431
commit
78e7629e9f
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@ -1,3 +1,13 @@
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2000-10-31 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
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* builtins.c (expand_builtin_strstr): New function.
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(expand_builtin): Handle BUILT_IN_STRSTR and BUILT_IN_STRCHR.
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* builtins.def (BUILT_IN_STRSTR, BUILT_IN_STRCHR): New entries.
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* c-common.c (c_common_nodes_and_builtins): Declare builtin strstr
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and builtin strchr.
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2000-10-31 Richard Henderson <rth@redhat.com>
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* config/i386/i386.c (fcmov_comparison_operator): Check for
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@ -108,6 +108,8 @@ static rtx expand_builtin_memset PARAMS ((tree));
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static rtx expand_builtin_bzero PARAMS ((tree));
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static rtx expand_builtin_strlen PARAMS ((tree, rtx,
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enum machine_mode));
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static rtx expand_builtin_strstr PARAMS ((tree, rtx,
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enum machine_mode));
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static rtx expand_builtin_alloca PARAMS ((tree, rtx));
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static rtx expand_builtin_ffs PARAMS ((tree, rtx, rtx));
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static rtx expand_builtin_frame_address PARAMS ((tree));
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@ -1431,6 +1433,64 @@ expand_builtin_strlen (exp, target, mode)
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}
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}
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/* Expand a call to the strstr builtin. Return 0 if we failed the
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caller should emit a normal call, otherwise try to get the result
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in TARGET, if convenient (and in mode MODE if that's convenient). */
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static rtx
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expand_builtin_strstr (arglist, target, mode)
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tree arglist;
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rtx target;
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enum machine_mode mode;
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{
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if (arglist == 0
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|| TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE
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|| TREE_CHAIN (arglist) == 0
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|| TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE)
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return 0;
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else
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{
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tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
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tree len = c_strlen (s2);
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if (!len)
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return 0;
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switch (compare_tree_int (len, 1))
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{
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case -1: /* length is 0, return s1. */
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return expand_expr (s1, target, mode, EXPAND_NORMAL);
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case 0: /* length is 1, return strchr(s1, s2[0]). */
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{
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tree call_expr, fn = built_in_decls[BUILT_IN_STRCHR];
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if (!fn)
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return 0;
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STRIP_NOPS (s2);
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if (s2 && TREE_CODE (s2) == ADDR_EXPR)
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s2 = TREE_OPERAND (s2, 0);
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/* New argument list transforming strstr(s1, s2) to
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strchr(s1, s2[0]). */
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arglist =
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build_tree_list (NULL_TREE,
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build_int_2 (TREE_STRING_POINTER (s2)[0], 0));
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arglist = tree_cons (NULL_TREE, s1, arglist);
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call_expr = build1 (ADDR_EXPR,
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build_pointer_type (TREE_TYPE (fn)), fn);
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call_expr = build (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)),
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call_expr, arglist, NULL_TREE);
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TREE_SIDE_EFFECTS (call_expr) = 1;
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return expand_expr (call_expr, target, mode, EXPAND_NORMAL);
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}
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case 1: /* length is greater than 1, really call strstr. */
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return 0;
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default:
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abort();
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}
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}
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}
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/* Expand a call to the memcpy builtin, with arguments in ARGLIST. */
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static rtx
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expand_builtin_memcpy (arglist)
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@ -2475,6 +2535,7 @@ expand_builtin (exp, target, subtarget, mode, ignore)
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|| fcode == BUILT_IN_MEMCPY || fcode == BUILT_IN_MEMCMP
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|| fcode == BUILT_IN_BCMP || fcode == BUILT_IN_BZERO
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|| fcode == BUILT_IN_STRLEN || fcode == BUILT_IN_STRCPY
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|| fcode == BUILT_IN_STRSTR
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|| fcode == BUILT_IN_STRCMP || fcode == BUILT_IN_FFS
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|| fcode == BUILT_IN_PUTCHAR || fcode == BUILT_IN_PUTS
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|| fcode == BUILT_IN_PRINTF || fcode == BUILT_IN_FPUTC
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@ -2603,6 +2664,12 @@ expand_builtin (exp, target, subtarget, mode, ignore)
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return target;
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break;
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case BUILT_IN_STRSTR:
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target = expand_builtin_strstr (arglist, target, mode);
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if (target)
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return target;
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break;
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case BUILT_IN_MEMCPY:
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target = expand_builtin_memcpy (arglist);
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if (target)
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@ -2696,6 +2763,7 @@ expand_builtin (exp, target, subtarget, mode, ignore)
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case BUILT_IN_PUTS:
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case BUILT_IN_FPUTC:
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case BUILT_IN_FWRITE:
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case BUILT_IN_STRCHR:
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break;
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case BUILT_IN_FPUTS:
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@ -39,6 +39,8 @@ DEF_BUILTIN(BUILT_IN_BCMP)
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DEF_BUILTIN(BUILT_IN_STRCPY)
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DEF_BUILTIN(BUILT_IN_STRCMP)
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DEF_BUILTIN(BUILT_IN_STRLEN)
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DEF_BUILTIN(BUILT_IN_STRSTR)
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DEF_BUILTIN(BUILT_IN_STRCHR)
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DEF_BUILTIN(BUILT_IN_FSQRT)
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DEF_BUILTIN(BUILT_IN_SIN)
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DEF_BUILTIN(BUILT_IN_COS)
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@ -4819,6 +4819,7 @@ c_common_nodes_and_builtins ()
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tree float_ftype_float, ldouble_ftype_ldouble;
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tree int_ftype_cptr_cptr_sizet;
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tree int_ftype_string_string, string_ftype_ptr_ptr;
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tree string_ftype_string_int, string_ftype_string_string;
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tree long_ftype_long;
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tree longlong_ftype_longlong;
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/* Either char* or void*. */
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@ -4933,6 +4934,22 @@ c_common_nodes_and_builtins ()
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const_string_type_node,
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endlink)));
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/* Prototype for strstr, etc. */
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string_ftype_string_string
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= build_function_type (string_type_node,
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tree_cons (NULL_TREE, const_string_type_node,
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tree_cons (NULL_TREE,
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const_string_type_node,
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endlink)));
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/* Prototype for strchr. */
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string_ftype_string_int
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= build_function_type (string_type_node,
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tree_cons (NULL_TREE, const_string_type_node,
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tree_cons (NULL_TREE,
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integer_type_node,
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endlink)));
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/* Prototype for strlen. */
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strlen_ftype
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= build_function_type (traditional_len_type_node,
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@ -5154,6 +5171,11 @@ c_common_nodes_and_builtins ()
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BUILT_IN_BCMP, BUILT_IN_NORMAL, "bcmp");
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builtin_function ("__builtin_strcmp", int_ftype_string_string,
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BUILT_IN_STRCMP, BUILT_IN_NORMAL, "strcmp");
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builtin_function ("__builtin_strstr", string_ftype_string_string,
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BUILT_IN_STRSTR, BUILT_IN_NORMAL, "strstr");
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built_in_decls[BUILT_IN_STRCHR] =
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builtin_function ("__builtin_strchr", string_ftype_string_int,
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BUILT_IN_STRCHR, BUILT_IN_NORMAL, "strchr");
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builtin_function ("__builtin_strcpy", string_ftype_ptr_ptr,
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BUILT_IN_STRCPY, BUILT_IN_NORMAL, "strcpy");
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builtin_function ("__builtin_strlen", strlen_ftype,
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@ -5222,6 +5244,8 @@ c_common_nodes_and_builtins ()
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BUILT_IN_NORMAL, NULL_PTR);
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builtin_function ("strcmp", int_ftype_string_string, BUILT_IN_STRCMP,
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BUILT_IN_NORMAL, NULL_PTR);
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builtin_function ("strstr", string_ftype_string_string, BUILT_IN_STRSTR,
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BUILT_IN_NORMAL, NULL_PTR);
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builtin_function ("strcpy", string_ftype_ptr_ptr, BUILT_IN_STRCPY,
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BUILT_IN_NORMAL, NULL_PTR);
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builtin_function ("strlen", strlen_ftype, BUILT_IN_STRLEN,
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