diff options
| author | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-07-19 10:27:07 +0000 |
|---|---|---|
| committer | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-07-19 10:27:07 +0000 |
| commit | a5d536df523c382cc266ab846912060a2a888eca (patch) | |
| tree | 18a19d1d0d3ba0f9e6bb73f587b8903c2c74a669 /gcc/tree-ssa-dce.c | |
| parent | 02c01bafd50499be42e2bd94f35531c134d7c7e3 (diff) | |
| download | gcc-a5d536df523c382cc266ab846912060a2a888eca.tar.gz | |
PR tree-optimization/40676
* tree-ssa-dce.c (eliminate_unnecessary_stmts): Do renaming on all
virtual PHIs in empty BBs.
* gcc.c-torture/compile/pr40676.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@149789 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index fdfdda5e95f..86134ad0970 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -1137,7 +1137,8 @@ eliminate_unnecessary_stmts (void) for (bb = ENTRY_BLOCK_PTR->next_bb; bb != EXIT_BLOCK_PTR; bb = next_bb) { next_bb = bb->next_bb; - if (!(bb->flags & BB_REACHABLE)) + if (!TEST_BIT (bb_contains_live_stmts, bb->index) + || !(bb->flags & BB_REACHABLE)) { for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) if (!is_gimple_reg (gimple_phi_result (gsi_stmt (gsi)))) @@ -1159,7 +1160,8 @@ eliminate_unnecessary_stmts (void) if (found) mark_virtual_phi_result_for_renaming (gsi_stmt (gsi)); } - delete_basic_block (bb); + if (!(bb->flags & BB_REACHABLE)) + delete_basic_block (bb); } } } |