diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/tree-ssa-dce.c | 9 |
2 files changed, 16 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6796d23..12f036b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2005-06-07 Steven Bosscher <stevenb@suse.de> + + 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. + 2005-06-07 Adrian Straetling <straetling@de.ibm.com> * config/s390/s390.md: ("UNSPECV_MB", "UNSPECV_CAS"): New constants. 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 |