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Diffstat (limited to 'gcc/tree-ssa-threadupdate.c')
| -rw-r--r-- | gcc/tree-ssa-threadupdate.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c index ce6dcad..112509f 100644 --- a/gcc/tree-ssa-threadupdate.c +++ b/gcc/tree-ssa-threadupdate.c @@ -172,17 +172,25 @@ static void create_block_for_threading (basic_block bb, struct redirection_data *rd) { tree phi; + edge e; /* We can use the generic block duplication code and simply remove the stuff we do not need. */ rd->dup_block = duplicate_block (bb, NULL); + /* Zero out the profile, since the block is unreachable for now. */ + rd->dup_block->frequency = 0; + rd->dup_block->count = 0; + /* The call to duplicate_block will copy everything, including the useless COND_EXPR or SWITCH_EXPR at the end of the block. We just remove the useless COND_EXPR or SWITCH_EXPR here rather than having a specialized block copier. */ remove_last_stmt_and_useless_edges (rd->dup_block, rd->outgoing_edge->dest); + for (e = rd->dup_block->succ; e; e = e->succ_next) + e->count = 0; + /* If there are any PHI nodes at the destination of the outgoing edge from the duplicate block, then we will need to add a new argument to them. The argument should have the same value as the argument |