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builtins.c (fold_builtin_isascii, [...]): New. 

* builtins.c (fold_builtin_isascii, fold_builtin_toascii): New.
	(fold_builtin): Handle BUILT_IN_ISASCII and BUILT_IN_TOASCII.

testsuite:
	* gcc.dg/torture/builtin-ctype-2.c: New test.

From-SVN: r80508
This commit is contained in:
Kaveh R. Ghazi 2004-04-08 14:46:05 +00:00 committed by Kaveh Ghazi
parent a7485e9375
commit df0785d62c
4 changed files with 136 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-04-08 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* builtins.c (fold_builtin_isascii, fold_builtin_toascii): New.
(fold_builtin): Handle BUILT_IN_ISASCII and BUILT_IN_TOASCII.
2004-04-07 H.J. Lu <hongjiu.lu@intel.com>
* config/ia64/ia64.c (ia64_encode_section_info): Don't prod

43
gcc/builtins.c
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@ -6742,6 +6742,43 @@ fold_builtin_signbit (tree exp)
return NULL_TREE;
}
/* Fold a call to builtin isascii. */
static tree
fold_builtin_isascii (tree arglist)
{
if (! validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
return 0;
else
{
/* Transform isascii(c) -> ((c & ~0x7f) == 0). */
tree arg = TREE_VALUE (arglist);
return fold (build (EQ_EXPR, integer_type_node,
build (BIT_AND_EXPR, integer_type_node, arg,
build_int_2 (~ (unsigned HOST_WIDE_INT) 0x7f,
~ (HOST_WIDE_INT) 0)),
integer_zero_node));
}
}
/* Fold a call to builtin toascii. */
static tree
fold_builtin_toascii (tree arglist)
{
if (! validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
return 0;
else
{
/* Transform toascii(c) -> (c & 0x7f). */
tree arg = TREE_VALUE (arglist);
return fold (build (BIT_AND_EXPR, integer_type_node, arg,
build_int_2 (0x7f, 0)));
}
}
/* Used by constant folding to eliminate some builtin calls early. EXP is
the CALL_EXPR of a call to a builtin function. */
@ -7236,6 +7273,12 @@ fold_builtin (tree exp)
case BUILT_IN_SIGNBITL:
return fold_builtin_signbit (exp);
case BUILT_IN_ISASCII:
return fold_builtin_isascii (arglist);
case BUILT_IN_TOASCII:
return fold_builtin_toascii (arglist);
default:
break;
}

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2004-04-08 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* gcc.dg/torture/builtin-ctype-2.c: New test.
2004-04-07 Ian Lance Taylor <ian@wasabisystems.com>
* gcc.dg/pch/pch.exp: Add largefile test.

84
gcc/testsuite/gcc.dg/torture/builtin-ctype-2.c Normal file
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@ -0,0 +1,84 @@
/* Copyright (C) 2004 Free Software Foundation.
Verify that built-in ctype transformations are done correctly by
the compiler.
Written by Kaveh Ghazi, 2004-04-05. */
/* { dg-do link } */
extern void link_failure_var(void);
void test(int i)
{
/* All of these ctype calls should compile-time evaluate to true. */
#define TEST_CTYPE_CST_TRUE(FN, VALUE) \
extern void link_failure_##FN##_cst_true(void); \
extern int FN(int); \
if (! FN(VALUE)) \
link_failure_##FN##_cst_true()
/* All of these ctype calls should compile-time evaluate to false. */
#define TEST_CTYPE_CST_FALSE(FN, VALUE) \
extern void link_failure_##FN##_cst_false(void); \
extern int FN(int); \
if (FN(VALUE)) \
link_failure_##FN##_cst_false()
/* All of these ctype calls should compile-time evaluate to true. */
#define TEST_TOCTYPE_CST_TRUE(FN, VALUE) \
extern void link_failure_##FN##_cst_true(void); \
extern int FN(int); \
if (FN(VALUE) != (VALUE)) \
link_failure_##FN##_cst_true()
/* All of these ctype calls should compile-time evaluate to false. */
#define TEST_TOCTYPE_CST_FALSE(FN, VALUE) \
extern void link_failure_##FN##_cst_false(void); \
extern int FN(int); \
if (FN(VALUE) == (VALUE)) \
link_failure_##FN##_cst_false()
#ifdef __OPTIMIZE__
TEST_CTYPE_CST_TRUE (isascii, 0);
TEST_CTYPE_CST_TRUE (isascii, 1);
TEST_CTYPE_CST_TRUE (isascii, 126);
TEST_CTYPE_CST_TRUE (isascii, 127);
TEST_CTYPE_CST_FALSE (isascii, -1);
TEST_CTYPE_CST_FALSE (isascii, 128);
TEST_CTYPE_CST_FALSE (isascii, 129);
TEST_CTYPE_CST_FALSE (isascii, 255);
TEST_CTYPE_CST_FALSE (isascii, 256);
TEST_CTYPE_CST_FALSE (isascii, 257);
TEST_CTYPE_CST_FALSE (isascii, 10000);
TEST_CTYPE_CST_FALSE (isascii, __INT_MAX__);
/* This ctype call should transform into another expression. */
if (isascii(i) != ((i & ~0x7f) == 0))
link_failure_var();
TEST_TOCTYPE_CST_TRUE (toascii, 0);
TEST_TOCTYPE_CST_TRUE (toascii, 1);
TEST_TOCTYPE_CST_TRUE (toascii, 126);
TEST_TOCTYPE_CST_TRUE (toascii, 127);
TEST_TOCTYPE_CST_FALSE (toascii, -1);
TEST_TOCTYPE_CST_FALSE (toascii, 128);
TEST_TOCTYPE_CST_FALSE (toascii, 129);
TEST_TOCTYPE_CST_FALSE (toascii, 255);
TEST_TOCTYPE_CST_FALSE (toascii, 256);
TEST_TOCTYPE_CST_FALSE (toascii, 10000);
TEST_TOCTYPE_CST_FALSE (toascii, __INT_MAX__);
/* This ctype call should transform into another expression. */
if (toascii(i) != (i & 0x7f))
link_failure_var();
#endif /* __OPTIMIZE__ */
}
int main (void)
{
return 0;
}