OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

re PR bootstrap/68346 (Bootstrap failure on i686-linux)

Browse Source 
PR bootstrap/68346

	* c-common.c (warn_tautological_cmp): Fold before checking for
	constants.

From-SVN: r230471
This commit is contained in:
Jason Merrill 2015-11-17 13:16:35 -05:00 committed by Jason Merrill
parent 3212c3c8ff
commit 3e44547c93
3 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/c-family/ChangeLog
View File

@ -1,3 +1,9 @@
2015-11-17 Jason Merrill <jason@redhat.com>
PR bootstrap/68346
* c-common.c (warn_tautological_cmp): Fold before checking for
constants.
2015-11-16 Marek Polacek <polacek@redhat.com>
PR c++/68362

2
gcc/c-family/c-common.c
View File

@ -1924,7 +1924,7 @@ warn_tautological_cmp (location_t loc, enum tree_code code, tree lhs, tree rhs)
/* We do not warn for constants because they are typical of macro
expansions that test for features, sizeof, and similar. */
if (CONSTANT_CLASS_P (lhs) || CONSTANT_CLASS_P (rhs))
if (CONSTANT_CLASS_P (fold (lhs)) || CONSTANT_CLASS_P (fold (rhs)))
return;
/* Don't warn for e.g.

11
gcc/testsuite/g++.dg/warn/Wtautological-compare2.C Normal file
View File

@ -0,0 +1,11 @@
// PR bootstrap/68346
// { dg-options -Wtautological-compare }
#define INVALID_REGNUM (~(unsigned int) 0)
#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
int main()
{
if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM)
__builtin_abort();
}