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| author | Jeffrey A Law <law@cygnus.com> | 1999-09-02 09:37:20 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1999-09-02 03:37:20 -0600 |
| commit | a8c61259522b6380059d092abfb7ca9c61fc36bf (patch) | |
| tree | 0ba4373ac2ecf552eaffb171563fd51e63e6d384 /gcc | |
| parent | 88bf1faf57dae2fd38f3fb152a8ed5b2aae3a4a0 (diff) | |
| download | gcc-a8c61259522b6380059d092abfb7ca9c61fc36bf.zip gcc-a8c61259522b6380059d092abfb7ca9c61fc36bf.tar.gz gcc-a8c61259522b6380059d092abfb7ca9c61fc36bf.tar.bz2 | |
fold-const.c (fold_range_test): Do not try to fold the range test if the rhs or lhs has side effects.
* fold-const.c (fold_range_test): Do not try to fold the range
test if the rhs or lhs has side effects.
From-SVN: r29058
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/fold-const.c | 4 |
2 files changed, 7 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 42f596b..a40330d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -13,6 +13,9 @@ Thu Sep 2 00:43:59 1999 Finn Hakansson <finn@axis.com> Thu Sep 2 00:06:43 1999 Jeffrey A Law (law@cygnus.com) + * fold-const.c (fold_range_test): Do not try to fold the range + test if the rhs or lhs has side effects. + * combine.c (simplify_rtx): Recognize another case of a synthesized sign extension. diff --git a/gcc/fold-const.c b/gcc/fold-const.c index ed353f8..3cde5f5 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -3560,6 +3560,10 @@ fold_range_test (exp) tree rhs = make_range (TREE_OPERAND (exp, 1), &in1_p, &low1, &high1); tree tem; + /* Fail if anything is volatile. */ + if (TREE_SIDE_EFFECTS (lhs) || TREE_SIDE_EFFECTS (rhs)) + return 0; + /* If this is an OR operation, invert both sides; we will invert again at the end. */ if (or_op) |