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| author | Roger Sayle <roger@eyesopen.com> | 2005-01-04 21:42:52 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2005-01-04 21:42:52 +0000 |
| commit | e3523f56d2fe5b163b358c96a53fb8da8a1a9426 (patch) | |
| tree | faa498a0ab57d1aac5113d7815e952b693d5d311 /gcc | |
| parent | 242746f19751e1942bc851c5eee9b8bfca16169c (diff) | |
| download | gcc-e3523f56d2fe5b163b358c96a53fb8da8a1a9426.zip gcc-e3523f56d2fe5b163b358c96a53fb8da8a1a9426.tar.gz gcc-e3523f56d2fe5b163b358c96a53fb8da8a1a9426.tar.bz2 | |
fold-const.c (fold_single_bit_test): Delete unreachable handling of TRUTH_NOT_EXPR.
* fold-const.c (fold_single_bit_test): Delete unreachable handling
of TRUTH_NOT_EXPR.
(fold): Don't call fold_single_bit_test with a TRUTH_NOT_EXPR, as
all the cases handled by it are inverted by invert_truthvalue.
From-SVN: r92909
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/fold-const.c | 23 |
2 files changed, 8 insertions, 22 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3cfaae7..96b0483a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2005-01-04 Roger Sayle <roger@eyesopen.com> + + * fold-const.c (fold_single_bit_test): Delete unreachable handling + of TRUTH_NOT_EXPR. + (fold): Don't call fold_single_bit_test with a TRUTH_NOT_EXPR, as + all the cases handled by it are inverted by invert_truthvalue. + 2005-01-04 Eric Botcazou <ebotcazou@libertysurf.fr> * config/sparc/sparc.md (save_register_windowdi): Add missing mode. diff --git a/gcc/fold-const.c b/gcc/fold-const.c index cd7b95b..a3d1f1d 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -5829,22 +5829,6 @@ tree fold_single_bit_test (enum tree_code code, tree arg0, tree arg1, tree result_type) { - /* If this is a TRUTH_NOT_EXPR, it may have a single bit test inside - operand 0. */ - if (code == TRUTH_NOT_EXPR) - { - code = TREE_CODE (arg0); - if (code != NE_EXPR && code != EQ_EXPR) - return NULL_TREE; - - /* Extract the arguments of the EQ/NE. */ - arg1 = TREE_OPERAND (arg0, 1); - arg0 = TREE_OPERAND (arg0, 0); - - /* This requires us to invert the code. */ - code = (code == EQ_EXPR ? NE_EXPR : EQ_EXPR); - } - /* If this is testing a single bit, we can optimize the test. */ if ((code == NE_EXPR || code == EQ_EXPR) && TREE_CODE (arg0) == BIT_AND_EXPR && integer_zerop (arg1) @@ -8043,12 +8027,7 @@ fold (tree expr) tem = invert_truthvalue (arg0); /* Avoid infinite recursion. */ if (TREE_CODE (tem) == TRUTH_NOT_EXPR) - { - tem = fold_single_bit_test (code, arg0, arg1, type); - if (tem) - return tem; - return t; - } + return t; return fold_convert (type, tem); case TRUTH_ANDIF_EXPR: |