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re PR c/61534 (Wlogical-op should not warn when either operand comes from macro expansion)

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PR c/61534
	* input.h (from_macro_expansion_at): Define.

	* c-common.c (warn_logical_operator): Bail if either operand comes
	from a macro expansion.

	* c-c++-common/pr61534-1.c: New test.

From-SVN: r222406
This commit is contained in:
Marek Polacek 2015-04-24 11:49:52 +00:00 committed by Marek Polacek
parent 841e98017e
commit b878781346
6 changed files with 40 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-04-24 Marek Polacek <polacek@redhat.com>
PR c/61534
* input.h (from_macro_expansion_at): Define.
2015-04-24 Thomas Preud'homme <thomas.preudhomme@arm.com>
* config/arm/unknown-elf.h (ASM_OUTPUT_ALIGNED_DECL_LOCAL): fix

6
gcc/c-family/ChangeLog
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@ -1,3 +1,9 @@
2015-04-24 Marek Polacek <polacek@redhat.com>
PR c/61534
* c-common.c (warn_logical_operator): Bail if either operand comes
from a macro expansion.
2015-04-10 Bernhard Reutner-Fischer <aldot@gcc.gnu.org>
PR target/55143

7
gcc/c-family/c-common.c
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@ -1697,6 +1697,13 @@ warn_logical_operator (location_t location, enum tree_code code, tree type,
&& code != TRUTH_OR_EXPR)
return;
/* We don't want to warn if either operand comes from a macro
expansion. ??? This doesn't work with e.g. NEGATE_EXPR yet;
see PR61534. */
if (from_macro_expansion_at (EXPR_LOCATION (op_left))
|| from_macro_expansion_at (EXPR_LOCATION (op_right)))
return;
/* Warn if &&/|| are being used in a context where it is
likely that the bitwise equivalent was intended by the
programmer. That is, an expression such as op && MASK

4
gcc/input.h
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@ -70,6 +70,10 @@ extern location_t input_location;
header, but expanded in a non-system file. */
#define in_system_header_at(LOC) \
(linemap_location_in_system_header_p (line_table, LOC))
/* Return a positive value if LOCATION is the locus of a token that
comes from a macro expansion, O otherwise. */
#define from_macro_expansion_at(LOC) \
((linemap_location_from_macro_expansion_p (line_table, LOC)))
void dump_line_table_statistics (void);

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2015-04-24 Marek Polacek <polacek@redhat.com>
PR c/61534
* c-c++-common/pr61534-1.c: New test.
2015-04-24 Thomas Preud'homme <thomas.preudhomme@arm.com>
Steven Bosscher <steven@gcc.gnu.org>

13
gcc/testsuite/c-c++-common/pr61534-1.c Normal file
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@ -0,0 +1,13 @@
/* PR c/61534 */
/* { dg-options "-Wlogical-op" } */
extern int xxx;
#define XXX !xxx
int
test (void)
{
if (XXX && xxx) /* { dg-bogus "logical" } */
return 4;
else
return 0;
}