diff options
Diffstat (limited to 'gcc/cfganal.c')
| -rw-r--r-- | gcc/cfganal.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/gcc/cfganal.c b/gcc/cfganal.c index 25f2507..63d17ce 100644 --- a/gcc/cfganal.c +++ b/gcc/cfganal.c @@ -1141,7 +1141,8 @@ compute_idf (bitmap def_blocks, bitmap_head *dfs) vec<int> work_stack; bitmap phi_insertion_points; - work_stack.create (n_basic_blocks); + /* Each block can appear at most twice on the work-stack. */ + work_stack.create (2 * n_basic_blocks); phi_insertion_points = BITMAP_ALLOC (NULL); /* Seed the work list with all the blocks in DEF_BLOCKS. We use @@ -1165,15 +1166,12 @@ compute_idf (bitmap def_blocks, bitmap_head *dfs) form, the basic blocks where new and/or old names are defined may have disappeared by CFG cleanup calls. In this case, we may pull a non-existing block from the work stack. */ - gcc_assert (bb_index < (unsigned) last_basic_block); + gcc_checking_assert (bb_index < (unsigned) last_basic_block); EXECUTE_IF_AND_COMPL_IN_BITMAP (&dfs[bb_index], phi_insertion_points, 0, i, bi) { - /* Use a safe push because if there is a definition of VAR - in every basic block, then WORK_STACK may eventually have - more than N_BASIC_BLOCK entries. */ - work_stack.safe_push (i); + work_stack.quick_push (i); bitmap_set_bit (phi_insertion_points, i); } } |