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-rw-r--r--gcc/ChangeLog11
-rw-r--r--gcc/builtin-types.def4
-rw-r--r--gcc/builtins.c73
-rw-r--r--gcc/builtins.def1
-rw-r--r--gcc/doc/extend.texi17
-rw-r--r--gcc/testsuite/ChangeLog7
-rw-r--r--gcc/testsuite/gcc.c-torture/execute/builtins/lib/memchr.c21
-rw-r--r--gcc/testsuite/gcc.c-torture/execute/builtins/memchr-lib.c1
-rw-r--r--gcc/testsuite/gcc.c-torture/execute/builtins/memchr.c38
9 files changed, 164 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 50e69eb1621..aee5d83ac9d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2007-05-11 Paolo Carlini <pcarlini@suse.de>
+
+ PR other/31852
+ * builtin-types.def: Add BT_FN_PTR_CONST_PTR_INT_SIZE.
+ * builtins.def: Add BUILT_IN_MEMCHR, use the latter.
+ * builtins.c (fold_builtin_memchr): New.
+ (expand_builtin_memchr): Call the latter.
+ (expand_builtin, fold_builtin_3): Deal with BUILT_IN_MEMCHR.
+ * doc/extend.texi ([Other built-in functions provided by GCC]):
+ Document memchr.
+
2007-05-11 Andreas Krebbel <krebbel1@de.ibm.com>
* config/s390/s390.md (GPR0_REGNUM, FPR0_REGNUM, FPR2_REGNUM,
diff --git a/gcc/builtin-types.def b/gcc/builtin-types.def
index e16fd7ab18c..bab6b9deaf5 100644
--- a/gcc/builtin-types.def
+++ b/gcc/builtin-types.def
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+/* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GCC.
@@ -371,6 +371,8 @@ DEF_FUNCTION_TYPE_3 (BT_FN_I16_VPTR_I16_I16, BT_I16, BT_VOLATILE_PTR,
BT_I16, BT_I16)
DEF_FUNCTION_TYPE_3 (BT_FN_VOID_OMPFN_PTR_UINT, BT_VOID, BT_PTR_FN_VOID_PTR,
BT_PTR, BT_UINT)
+DEF_FUNCTION_TYPE_3 (BT_FN_PTR_CONST_PTR_INT_SIZE, BT_PTR,
+ BT_CONST_PTR, BT_INT, BT_SIZE)
DEF_FUNCTION_TYPE_4 (BT_FN_SIZE_CONST_PTR_SIZE_SIZE_FILEPTR,
BT_SIZE, BT_CONST_PTR, BT_SIZE, BT_SIZE, BT_FILEPTR)
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 2cf15797d95..48c0cc0871f 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -105,6 +105,7 @@ static rtx expand_builtin_next_arg (void);
static rtx expand_builtin_va_start (tree);
static rtx expand_builtin_va_end (tree);
static rtx expand_builtin_va_copy (tree);
+static rtx expand_builtin_memchr (tree, rtx, enum machine_mode);
static rtx expand_builtin_memcmp (tree, rtx, enum machine_mode);
static rtx expand_builtin_strcmp (tree, rtx, enum machine_mode);
static rtx expand_builtin_strncmp (tree, rtx, enum machine_mode);
@@ -172,6 +173,7 @@ static tree fold_builtin_int_roundingfn (tree, tree);
static tree fold_builtin_bitop (tree, tree);
static tree fold_builtin_memory_op (tree, tree, tree, tree, bool, int);
static tree fold_builtin_strchr (tree, tree, tree);
+static tree fold_builtin_memchr (tree, tree, tree, tree);
static tree fold_builtin_memcmp (tree, tree, tree);
static tree fold_builtin_strcmp (tree, tree);
static tree fold_builtin_strncmp (tree, tree, tree);
@@ -3978,6 +3980,26 @@ expand_builtin_bzero (tree exp)
const0_rtx, VOIDmode, exp);
}
+/* Expand a call to the memchr builtin. Return NULL_RTX if we failed the
+ caller should emit a normal call, otherwise try to get the result
+ in TARGET, if convenient (and in mode MODE if that's convenient). */
+
+static rtx
+expand_builtin_memchr (tree exp, rtx target, enum machine_mode mode)
+{
+ if (validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE,
+ INTEGER_TYPE, VOID_TYPE))
+ {
+ tree type = TREE_TYPE (exp);
+ tree result = fold_builtin_memchr (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1),
+ CALL_EXPR_ARG (exp, 2), type);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+ return NULL_RTX;
+}
+
/* Expand expression EXP, which is a call to the memcmp built-in function.
Return NULL_RTX if we failed and the
caller should emit a normal call, otherwise try to get the result in
@@ -6345,6 +6367,12 @@ expand_builtin (tree exp, rtx target, rtx subtarget, enum machine_mode mode,
return target;
break;
+ case BUILT_IN_MEMCHR:
+ target = expand_builtin_memchr (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
case BUILT_IN_BCMP:
case BUILT_IN_MEMCMP:
target = expand_builtin_memcmp (exp, target, mode);
@@ -8654,6 +8682,48 @@ fold_builtin_strncpy (tree fndecl, tree dest, tree src, tree len, tree slen)
build_call_expr (fn, 3, dest, src, len));
}
+/* Fold function call to builtin memchr. ARG1, ARG2 and LEN are the
+ arguments to the call, and TYPE is its return type.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_memchr (tree arg1, tree arg2, tree len, tree type)
+{
+ if (!validate_arg (arg1, POINTER_TYPE)
+ || !validate_arg (arg2, INTEGER_TYPE)
+ || !validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ const char *p1;
+
+ if (TREE_CODE (arg2) != INTEGER_CST
+ || !host_integerp (len, 1))
+ return NULL_TREE;
+
+ p1 = c_getstr (arg1);
+ if (p1 && compare_tree_int (len, strlen (p1) + 1) <= 0)
+ {
+ char c;
+ const char *r;
+ tree tem;
+
+ if (target_char_cast (arg2, &c))
+ return NULL_TREE;
+
+ r = memchr (p1, c, tree_low_cst (len, 1));
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (arg1), 0);
+
+ tem = fold_build2 (PLUS_EXPR, TREE_TYPE (arg1), arg1,
+ build_int_cst (TREE_TYPE (arg1), r - p1));
+ return fold_convert (type, tem);
+ }
+ return NULL_TREE;
+ }
+}
+
/* Fold function call to builtin memcmp with arguments ARG1 and ARG2.
Return NULL_TREE if no simplification can be made. */
@@ -9983,6 +10053,9 @@ fold_builtin_3 (tree fndecl, tree arg0, tree arg1, tree arg2, bool ignore)
case BUILT_IN_STRNCMP:
return fold_builtin_strncmp (arg0, arg1, arg2);
+ case BUILT_IN_MEMCHR:
+ return fold_builtin_memchr (arg0, arg1, arg2, type);
+
case BUILT_IN_BCMP:
case BUILT_IN_MEMCMP:
return fold_builtin_memcmp (arg0, arg1, arg2);;
diff --git a/gcc/builtins.def b/gcc/builtins.def
index e0652c85233..1c17edb2118 100644
--- a/gcc/builtins.def
+++ b/gcc/builtins.def
@@ -502,6 +502,7 @@ DEF_EXT_LIB_BUILTIN (BUILT_IN_BCMP, "bcmp", BT_FN_INT_CONST_PTR_CONST_PTR_SIZ
DEF_EXT_LIB_BUILTIN (BUILT_IN_BCOPY, "bcopy", BT_FN_VOID_CONST_PTR_PTR_SIZE, ATTR_NOTHROW_LIST)
DEF_EXT_LIB_BUILTIN (BUILT_IN_BZERO, "bzero", BT_FN_VOID_PTR_SIZE, ATTR_NOTHROW_LIST)
DEF_EXT_LIB_BUILTIN (BUILT_IN_INDEX, "index", BT_FN_STRING_CONST_STRING_INT, ATTR_PURE_NOTHROW_NONNULL)
+DEF_LIB_BUILTIN (BUILT_IN_MEMCHR, "memchr", BT_FN_PTR_CONST_PTR_INT_SIZE, ATTR_PURE_NOTHROW_NONNULL)
DEF_LIB_BUILTIN (BUILT_IN_MEMCMP, "memcmp", BT_FN_INT_CONST_PTR_CONST_PTR_SIZE, ATTR_PURE_NOTHROW_NONNULL)
DEF_LIB_BUILTIN (BUILT_IN_MEMCPY, "memcpy", BT_FN_PTR_PTR_CONST_PTR_SIZE, ATTR_NOTHROW_NONNULL)
DEF_LIB_BUILTIN (BUILT_IN_MEMMOVE, "memmove", BT_FN_PTR_PTR_CONST_PTR_SIZE, ATTR_NOTHROW_NONNULL)
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 1069892a50c..574bc127768 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -5592,6 +5592,7 @@ should be called and the @var{flag} argument passed to it.
@findex lroundf
@findex lroundl
@findex malloc
+@findex memchr
@findex memcmp
@findex memcpy
@findex mempcpy
@@ -5836,14 +5837,14 @@ The ISO C90 functions
@code{isgraph}, @code{islower}, @code{isprint}, @code{ispunct},
@code{isspace}, @code{isupper}, @code{isxdigit}, @code{tolower},
@code{toupper}, @code{labs}, @code{ldexp}, @code{log10}, @code{log},
-@code{malloc}, @code{memcmp}, @code{memcpy}, @code{memset}, @code{modf},
-@code{pow}, @code{printf}, @code{putchar}, @code{puts}, @code{scanf},
-@code{sinh}, @code{sin}, @code{snprintf}, @code{sprintf}, @code{sqrt},
-@code{sscanf}, @code{strcat}, @code{strchr}, @code{strcmp},
-@code{strcpy}, @code{strcspn}, @code{strlen}, @code{strncat},
-@code{strncmp}, @code{strncpy}, @code{strpbrk}, @code{strrchr},
-@code{strspn}, @code{strstr}, @code{tanh}, @code{tan}, @code{vfprintf},
-@code{vprintf} and @code{vsprintf}
+@code{malloc}, @code{memchr}, @code{memcmp}, @code{memcpy},
+@code{memset}, @code{modf}, @code{pow}, @code{printf}, @code{putchar},
+@code{puts}, @code{scanf}, @code{sinh}, @code{sin}, @code{snprintf},
+@code{sprintf}, @code{sqrt}, @code{sscanf}, @code{strcat},
+@code{strchr}, @code{strcmp}, @code{strcpy}, @code{strcspn},
+@code{strlen}, @code{strncat}, @code{strncmp}, @code{strncpy},
+@code{strpbrk}, @code{strrchr}, @code{strspn}, @code{strstr},
+@code{tanh}, @code{tan}, @code{vfprintf}, @code{vprintf} and @code{vsprintf}
are all recognized as built-in functions unless
@option{-fno-builtin} is specified (or @option{-fno-builtin-@var{function}}
is specified for an individual function). All of these functions have
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3f606756982..dc59bf04d8a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2007-05-11 Paolo Carlini <pcarlini@suse.de>
+
+ PR other/31852
+ * gcc.c-torture/execute/builtins/memchr.c: New.
+ * gcc.c-torture/execute/builtins/memchr-lib.c: New.
+ * gcc.c-torture/execute/builtins/lib/memchr.c: New.
+
2007-05-11 Paul Thomas <pault@gcc.gnu.org>
PR fortran/30876
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/lib/memchr.c b/gcc/testsuite/gcc.c-torture/execute/builtins/lib/memchr.c
new file mode 100644
index 00000000000..ddab08bcf8d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/lib/memchr.c
@@ -0,0 +1,21 @@
+extern void abort(void);
+extern int inside_main;
+
+void *
+memchr (const void *s, int c, __SIZE_TYPE__ n)
+{
+ const unsigned char uc = c;
+ const unsigned char *sp;
+
+#ifdef __OPTIMIZE__
+ if (inside_main)
+ abort ();
+#endif
+
+ sp = s;
+ for (; n != 0; ++sp, --n)
+ if (*sp == uc)
+ return (void *) sp;
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/memchr-lib.c b/gcc/testsuite/gcc.c-torture/execute/builtins/memchr-lib.c
new file mode 100644
index 00000000000..ccea6ba7d97
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/memchr-lib.c
@@ -0,0 +1 @@
+#include "lib/memchr.c"
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/memchr.c b/gcc/testsuite/gcc.c-torture/execute/builtins/memchr.c
new file mode 100644
index 00000000000..88e731128f6
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/memchr.c
@@ -0,0 +1,38 @@
+/* Copyright (C) 2007 Free Software Foundation.
+
+ Ensure all expected transformations of builtin memchr occur
+ and perform correctly.
+
+ Written by Paolo Carlini, 10/5/2007. */
+
+extern void abort (void);
+typedef __SIZE_TYPE__ size_t;
+extern void *memchr (const void *, int, size_t);
+
+void
+main_test (void)
+{
+ const char* const foo1 = "hello world";
+
+ if (memchr (foo1, 'x', 11))
+ abort ();
+ if (memchr (foo1, 'o', 11) != foo1 + 4)
+ abort ();
+ if (memchr (foo1, 'w', 2))
+ abort ();
+ if (memchr (foo1 + 5, 'o', 6) != foo1 + 7)
+ abort ();
+ if (memchr (foo1, 'd', 11) != foo1 + 10)
+ abort ();
+ if (memchr (foo1, 'd', 10))
+ abort ();
+ if (memchr (foo1, '\0', 11))
+ abort ();
+ if (memchr (foo1, '\0', 12) != foo1 + 11)
+ abort ();
+
+ /* Test at least one instance of the __builtin_ style. We do this
+ to ensure that it works and that the prototype is correct. */
+ if (__builtin_memchr (foo1, 'r', 11) != foo1 + 8)
+ abort ();
+}
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