diff options
| author | kvn <none@none> | 2011-05-04 13:12:42 -0700 |
|---|---|---|
| committer | kvn <none@none> | 2011-05-04 13:12:42 -0700 |
| commit | 8e4328589a700f8cadab8f9b7d73ab75ae54b7f3 (patch) | |
| tree | 4b85e785d497487fbf8f4bad6403f55b2cd164af /src/share/vm/opto/ifnode.cpp | |
| parent | 2823a5be160d9d71d9d8672d2eddf04348661112 (diff) | |
5091921: Sign flip issues in loop optimizer
Summary: Fix integer overflow problem in the code generated by loop optimizer.
Reviewed-by: never
Diffstat (limited to 'src/share/vm/opto/ifnode.cpp')
| -rw-r--r-- | src/share/vm/opto/ifnode.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/share/vm/opto/ifnode.cpp b/src/share/vm/opto/ifnode.cpp index bcdf5ad64..3a5c3af75 100644 --- a/src/share/vm/opto/ifnode.cpp +++ b/src/share/vm/opto/ifnode.cpp @@ -236,6 +236,7 @@ static Node* split_if(IfNode *iff, PhaseIterGVN *igvn) { } Node* predicate_c = NULL; Node* predicate_x = NULL; + bool counted_loop = r->is_CountedLoop(); Node *region_c = new (igvn->C, req_c + 1) RegionNode(req_c + 1); Node *phi_c = con1; @@ -294,16 +295,16 @@ static Node* split_if(IfNode *iff, PhaseIterGVN *igvn) { if (predicate_c != NULL) { assert(predicate_x == NULL, "only one predicate entry expected"); // Clone loop predicates to each path - iff_c_t = igvn->clone_loop_predicates(predicate_c, iff_c_t); - iff_c_f = igvn->clone_loop_predicates(predicate_c, iff_c_f); + iff_c_t = igvn->clone_loop_predicates(predicate_c, iff_c_t, !counted_loop); + iff_c_f = igvn->clone_loop_predicates(predicate_c, iff_c_f, !counted_loop); } Node *iff_x_t = phase->transform(new (igvn->C, 1) IfTrueNode (iff_x)); Node *iff_x_f = phase->transform(new (igvn->C, 1) IfFalseNode(iff_x)); if (predicate_x != NULL) { assert(predicate_c == NULL, "only one predicate entry expected"); // Clone loop predicates to each path - iff_x_t = igvn->clone_loop_predicates(predicate_x, iff_x_t); - iff_x_f = igvn->clone_loop_predicates(predicate_x, iff_x_f); + iff_x_t = igvn->clone_loop_predicates(predicate_x, iff_x_t, !counted_loop); + iff_x_f = igvn->clone_loop_predicates(predicate_x, iff_x_f, !counted_loop); } // Merge the TRUE paths |