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| author | Steven Bosscher <stevenb@suse.de> | 2005-06-07 16:54:16 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2005-06-07 16:54:16 +0000 |
| commit | 75b80166a26a5844e82097fe3414cfea822eebd9 (patch) | |
| tree | de57d6e4b854feb8d7462b3305cd895ca216196b /gcc/tree-ssa-dce.c | |
| parent | 225962a09b477edd843f345218f75aaa71fea52f (diff) | |
| download | gcc-75b80166a26a5844e82097fe3414cfea822eebd9.zip gcc-75b80166a26a5844e82097fe3414cfea822eebd9.tar.gz gcc-75b80166a26a5844e82097fe3414cfea822eebd9.tar.bz2 | |
re PR tree-optimization/21847 (misscompiling of the following java code)
PR tree-optimization/21847
* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): With
-fnon-call-exceptions, also mark statements inherently
necessary if they may throw.
From-SVN: r100714
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index 65c85eb..f6e62dc 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -279,6 +279,15 @@ mark_stmt_if_obviously_necessary (tree stmt, bool aggressive) tree op, def; ssa_op_iter iter; + /* With non-call exceptions, we have to assume that all statements could + throw. If a statement may throw, it is inherently necessary. */ + if (flag_non_call_exceptions + && tree_could_throw_p (stmt)) + { + mark_stmt_necessary (stmt, true); + return; + } + /* Statements that are implicitly live. Most function calls, asm and return statements are required. Labels and BIND_EXPR nodes are kept because they are control flow, and we have no way of knowing whether they can be |