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| author | Jason Merrill <jason@redhat.com> | 2015-11-17 13:16:35 -0500 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2015-11-17 13:16:35 -0500 |
| commit | 3e44547c936be9e741411e812fc1565f539641c1 (patch) | |
| tree | a287eb144d579d831d29ac162fbecfaac0eda88a | |
| parent | 3212c3c8ff81e677cef51136e13966a4157648d1 (diff) | |
| download | gcc-3e44547c936be9e741411e812fc1565f539641c1.zip gcc-3e44547c936be9e741411e812fc1565f539641c1.tar.gz gcc-3e44547c936be9e741411e812fc1565f539641c1.tar.bz2 | |
re PR bootstrap/68346 (Bootstrap failure on i686-linux)
PR bootstrap/68346
* c-common.c (warn_tautological_cmp): Fold before checking for
constants.
From-SVN: r230471
| -rw-r--r-- | gcc/c-family/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/c-family/c-common.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/warn/Wtautological-compare2.C | 11 |
3 files changed, 18 insertions, 1 deletions
diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index 3151e34..9ba2ea0 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -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 diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index 06d857c..f50ca48 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -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. diff --git a/gcc/testsuite/g++.dg/warn/Wtautological-compare2.C b/gcc/testsuite/g++.dg/warn/Wtautological-compare2.C new file mode 100644 index 0000000..9d9060d --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wtautological-compare2.C @@ -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(); +} |