diff options
| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-09-02 09:37:20 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-09-02 09:37:20 +0000 |
| commit | e00fda43f2a95b08339238bf7eadb7174780d691 (patch) | |
| tree | 0ba4373ac2ecf552eaffb171563fd51e63e6d384 /gcc | |
| parent | 492de4b7d9b991829897f8ebe38bd3da17357f67 (diff) | |
| download | gcc-e00fda43f2a95b08339238bf7eadb7174780d691.tar.gz | |
* fold-const.c (fold_range_test): Do not try to fold the range
test if the rhs or lhs has side effects.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@29058 138bc75d-0d04-0410-961f-82ee72b054a4
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 42f596bbd45..a40330ddf56 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 ed353f89627..3cde5f539b0 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) |