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| author | Richard Stallman <rms@gnu.org> | 1993-10-31 03:13:52 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-10-31 03:13:52 +0000 |
| commit | 8396a8d6fa187f93296c401f76b4150f9b3037aa (patch) | |
| tree | a97c431ec19396bc035762c5e9ca2386441e3135 /gcc/c-common.c | |
| parent | a81fee56a95764ef7040351599e20506c879fa6a (diff) | |
| download | gcc-8396a8d6fa187f93296c401f76b4150f9b3037aa.zip gcc-8396a8d6fa187f93296c401f76b4150f9b3037aa.tar.gz gcc-8396a8d6fa187f93296c401f76b4150f9b3037aa.tar.bz2 | |
(shorten_compare): Do nothing if both args constant.
From-SVN: r5954
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index a6e7826..37d0458 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -1259,6 +1259,13 @@ shorten_compare (op0_ptr, op1_ptr, restype_ptr, rescode_ptr) tree primop0, primop1; enum tree_code code = *rescode_ptr; + /* Don't do anything if both args are constant. + This avoids confusing warnings. The caller will fold properly. */ + if ((TREE_CODE (op0) == INTEGER_CST || TREE_CODE (op0) == REAL_CST) + && + (TREE_CODE (op1) == INTEGER_CST || TREE_CODE (op1) == REAL_CST)) + return 0; + /* Throw away any conversions to wider types already present in the operands. */ |