diff options
Diffstat (limited to 'gcc/cfgbuild.c')
| -rw-r--r-- | gcc/cfgbuild.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/gcc/cfgbuild.c b/gcc/cfgbuild.c index e860e98..834119d 100644 --- a/gcc/cfgbuild.c +++ b/gcc/cfgbuild.c @@ -138,7 +138,7 @@ control_flow_insn_p (rtx insn) static int count_basic_blocks (rtx f) { - int count = 0; + int count = NUM_FIXED_BLOCKS; bool saw_insn = false; rtx insn; @@ -164,10 +164,10 @@ count_basic_blocks (rtx f) /* The rest of the compiler works a bit smoother when we don't have to check for the edge case of do-nothing functions with no basic blocks. */ - if (count == 0) + if (count == NUM_FIXED_BLOCKS) { emit_insn (gen_rtx_USE (VOIDmode, const0_rtx)); - count = 1; + count = NUM_FIXED_BLOCKS + 1; } return count; @@ -529,10 +529,11 @@ find_basic_blocks (rtx f) } n_basic_blocks = count_basic_blocks (f); - last_basic_block = 0; + last_basic_block = NUM_FIXED_BLOCKS; ENTRY_BLOCK_PTR->next_bb = EXIT_BLOCK_PTR; EXIT_BLOCK_PTR->prev_bb = ENTRY_BLOCK_PTR; + /* Size the basic block table. The actual structures will be allocated by find_basic_blocks_1, since we want to keep the structure pointers stable across calls to find_basic_blocks. */ @@ -542,6 +543,8 @@ find_basic_blocks (rtx f) actually lay them out. */ VARRAY_BB_INIT (basic_block_info, n_basic_blocks, "basic_block_info"); + BASIC_BLOCK (ENTRY_BLOCK) = ENTRY_BLOCK_PTR; + BASIC_BLOCK (EXIT_BLOCK) = EXIT_BLOCK_PTR; find_basic_blocks_1 (f); |