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c-common.c (constant_fits_type_p): New function.

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* c-common.c (constant_fits_type_p): New function.
	(convert_and_check): Use it.

	* gcc.c-torture/compile/20010209-1.c: New test.

From-SVN: r39596
This commit is contained in:
Jakub Jelinek 2001-02-12 09:34:30 +01:00 committed by Jakub Jelinek
parent b1012f1b4c
commit d02b54f66d
4 changed files with 32 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-02-12 Jakub Jelinek <jakub@redhat.com>
* c-common.c (constant_fits_type_p): New function.
(convert_and_check): Use it.
2001-02-11 Mark Mitchell <mark@codesourcery.com>
* Makefile.in (GXX_ABI_FLAG): Don't define.

17
gcc/c-common.c
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@ -232,6 +232,7 @@ static void add_attribute PARAMS ((enum attrs, const char *,
int, int, int));
static void init_attributes PARAMS ((void));
static int default_valid_lang_attribute PARAMS ((tree, tree, tree, tree));
static int constant_fits_type_p PARAMS ((tree, tree));
/* Keep a stack of if statements. We record the number of compound
statements seen up to the if keyword, as well as the line number
@ -1189,6 +1190,20 @@ unsigned_conversion_warning (result, operand)
}
}
/* Nonzero if constant C has a value that is permissible
for type TYPE (an INTEGER_TYPE). */
static int
constant_fits_type_p (c, type)
tree c, type;
{
if (TREE_CODE (c) == INTEGER_CST)
return int_fits_type_p (c, type);
c = convert (type, c);
return !TREE_OVERFLOW (c);
}
/* Convert EXPR to TYPE, warning about conversion problems with constants.
Invoke this function on every expression that is converted implicitly,
i.e. because of language rules and not because of an explicit cast. */
@ -1216,7 +1231,7 @@ convert_and_check (type, expr)
don't warn unless pedantic. */
if ((pedantic
|| TREE_UNSIGNED (type)
|| ! int_fits_type_p (expr, unsigned_type (type)))
|| ! constant_fits_type_p (expr, unsigned_type (type)))
&& skip_evaluation == 0)
warning ("overflow in implicit constant conversion");
}

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2001-02-12 Jakub Jelinek <jakub@redhat.com>
* gcc.c-torture/compile/20010209-1.c: New test.
2001-02-11 Jeffrey Oldham <oldham@codesourcery.com>
* g++.old-deja/g++.other/crash26.C: XFAIL if parser produces

7
gcc/testsuite/gcc.c-torture/compile/20010209-1.c Normal file
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@ -0,0 +1,7 @@
short int a;
int main (void)
{
a = 65535.0;
return 0;
}