diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-ssa-uninit.c | 5 |
2 files changed, 9 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fa0bb76..32f6e4b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2013-03-01 Xinliang David Li <davidxl@google.com> + + * tree-ssa-uninit.c (compute_control_dep_chain): Limit post-dom + walk length. + 2013-03-01 Jakub Jelinek <jakub@redhat.com> PR middle-end/56461 diff --git a/gcc/tree-ssa-uninit.c b/gcc/tree-ssa-uninit.c index a91ee37..e8f3ff7 100644 --- a/gcc/tree-ssa-uninit.c +++ b/gcc/tree-ssa-uninit.c @@ -229,6 +229,7 @@ find_control_equiv_block (basic_block bb) #define MAX_NUM_CHAINS 8 #define MAX_CHAIN_LEN 5 +#define MAX_POSTDOM_CHECK 8 /* Computes the control dependence chains (paths of edges) for DEP_BB up to the dominating basic block BB (the head node of a @@ -269,6 +270,7 @@ compute_control_dep_chain (basic_block bb, basic_block dep_bb, FOR_EACH_EDGE (e, ei, bb->succs) { basic_block cd_bb; + int post_dom_check = 0; if (e->flags & (EDGE_FAKE | EDGE_ABNORMAL)) continue; @@ -298,7 +300,8 @@ compute_control_dep_chain (basic_block bb, basic_block dep_bb, } cd_bb = find_pdom (cd_bb); - if (cd_bb == EXIT_BLOCK_PTR) + post_dom_check++; + if (cd_bb == EXIT_BLOCK_PTR || post_dom_check > MAX_POSTDOM_CHECK) break; } cur_cd_chain->pop (); |