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| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-05-18 16:49:49 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-05-18 16:49:49 +0000 |
| commit | fb3f413ca11a192b595eacf552f98dfd9dd236a7 (patch) | |
| tree | 4887c3d9b25e73017920c2b4fc1c76a1056c4897 | |
| parent | 9f7b18076b94cbd0b3a5bffdce7c66c242b99f7a (diff) | |
| download | ppe42-gcc-fb3f413ca11a192b595eacf552f98dfd9dd236a7.tar.gz ppe42-gcc-fb3f413ca11a192b595eacf552f98dfd9dd236a7.zip | |
* tree-ssa-forwprop.c (forward_propagate_addr_expr): Do not
propagate an ADDR_EXPR if the definition and use sites are
in different EH regions.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@99906 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a112e174ab2..acc2bcb0610 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2005-05-18 Jeff Law <law@redhat.com> + + * tree-ssa-forwprop.c (forward_propagate_addr_expr): Do not + propagate an ADDR_EXPR if the definition and use sites are + in different EH regions. + 2005-05-18 Ian Lance Taylor <ian@airs.com> * read-rtl.c (mode_attr_index): Use obstack_grow0, not diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index fb3dcaf6ea8..f65df577cb3 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -537,6 +537,11 @@ forward_propagate_addr_expr (tree stmt) if (bb_for_stmt (use_stmt)->loop_depth > stmt_loop_depth) return false; + /* If the two statements belong to different EH regions, then there + is nothing we can or should try to do. */ + if (lookup_stmt_eh_region (use_stmt) != lookup_stmt_eh_region (stmt)) + return false; + /* Strip away any outer COMPONENT_REF/ARRAY_REF nodes from the LHS. */ lhs = TREE_OPERAND (use_stmt, 0); while (TREE_CODE (lhs) == COMPONENT_REF || TREE_CODE (lhs) == ARRAY_REF) |
