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| author | Steven Bosscher <stevenb@suse.de> | 2004-07-07 22:19:43 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2004-07-07 22:19:43 +0000 |
| commit | 31e9eea2e8f655ca4bc1e3f059b647e23d3989d2 (patch) | |
| tree | cebb5009c240f7327074a7762f98f51e661237a0 /gcc/tree-cfg.c | |
| parent | 192c02b69c084244eea2c80e3245b72c580bd8c1 (diff) | |
| download | gcc-31e9eea2e8f655ca4bc1e3f059b647e23d3989d2.tar.gz | |
tree-cfg (group_case_labels): Remove case labels that have the same target as the default case.
* tree-cfg (group_case_labels): Remove case labels that have the
same target as the default case.
From-SVN: r84239
Diffstat (limited to 'gcc/tree-cfg.c')
| -rw-r--r-- | gcc/tree-cfg.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index 4bf00dff375..8600a99e412 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -937,6 +937,7 @@ group_case_labels (void) tree labels = SWITCH_LABELS (stmt); int old_size = TREE_VEC_LENGTH (labels); int i, j, new_size = old_size; + tree default_label = TREE_VEC_ELT (labels, old_size - 1); /* Look for possible opportunities to merge cases. Ignore the last element of the label vector because it @@ -950,8 +951,18 @@ group_case_labels (void) if (! base_case) abort (); - type = TREE_TYPE (CASE_LOW (base_case)); base_label = CASE_LABEL (base_case); + + /* Discard cases that have the same destination as the + default case. */ + if (base_label == default_label) + { + TREE_VEC_ELT (labels, i) = NULL_TREE; + i++; + continue; + } + + type = TREE_TYPE (CASE_LOW (base_case)); base_high = CASE_HIGH (base_case) ? CASE_HIGH (base_case) : CASE_LOW (base_case); |