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tree-ssa-forwprop.c (forward_propagate_addr_expr): Do not propagate an ADDR_EXPR if the definition and use sites are in different...

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* 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.

From-SVN: r99906
This commit is contained in:
Jeff Law 2005-05-18 10:49:49 -06:00 committed by Jeff Law
parent 33a9ae4927
commit 472945f6d2
2 changed files with 11 additions and 0 deletions
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gcc/ChangeLog
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@ -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

5
gcc/tree-ssa-forwprop.c
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@ -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)