diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-10-20 11:09:54 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-10-20 11:09:54 +0000 |
| commit | 3211fa0aac7a557f2fa98b17e52b25896b30b523 (patch) | |
| tree | 787b901537ce872da945a332f8791b8d5726a19e /gcc/tree-ssa-phiopt.c | |
| parent | 85cea2e300bb24c3736eb946ae0af0fb711705f3 (diff) | |
| download | gcc-3211fa0aac7a557f2fa98b17e52b25896b30b523.tar.gz | |
2010-10-20 Richard Guenther <rguenther@suse.de>
PR tree-optimization/45860
* tree-ssa-phiopt.c (cond_store_replacement): Do not do
conditional store replacement for non-register type stores.
* gcc.dg/torture/pr45860.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@165718 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-phiopt.c')
| -rw-r--r-- | gcc/tree-ssa-phiopt.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/gcc/tree-ssa-phiopt.c b/gcc/tree-ssa-phiopt.c index 482f267a648..8555bc1ef6f 100644 --- a/gcc/tree-ssa-phiopt.c +++ b/gcc/tree-ssa-phiopt.c @@ -1204,10 +1204,11 @@ cond_store_replacement (basic_block middle_bb, basic_block join_bb, || TREE_CODE (TREE_OPERAND (lhs, 0)) != SSA_NAME) return false; - /* RHS is either a single SSA_NAME or a constant. */ + /* RHS is either a single SSA_NAME or a constant of register type. */ code = gimple_assign_rhs_code (assign); if (get_gimple_rhs_class (code) != GIMPLE_SINGLE_RHS - || (code != SSA_NAME && !is_gimple_min_invariant (rhs))) + || (code != SSA_NAME && !is_gimple_min_invariant (rhs)) + || !is_gimple_reg_type (TREE_TYPE (lhs))) return false; /* Prove that we can move the store down. We could also check TREE_THIS_NOTRAP here, but in that case we also could move stores, @@ -1217,8 +1218,8 @@ cond_store_replacement (basic_block middle_bb, basic_block join_bb, /* Now we've checked the constraints, so do the transformation: 1) Remove the single store. */ - mark_symbols_for_renaming (assign); gsi = gsi_for_stmt (assign); + unlink_stmt_vdef (assign); gsi_remove (&gsi, true); /* 2) Create a temporary where we can store the old content @@ -1237,7 +1238,6 @@ cond_store_replacement (basic_block middle_bb, basic_block join_bb, name = make_ssa_name (condstoretemp, new_stmt); gimple_assign_set_lhs (new_stmt, name); gimple_set_location (new_stmt, locus); - mark_symbols_for_renaming (new_stmt); gsi_insert_on_edge (e1, new_stmt); /* 4) Create a PHI node at the join block, with one argument @@ -1249,7 +1249,6 @@ cond_store_replacement (basic_block middle_bb, basic_block join_bb, lhs = unshare_expr (lhs); new_stmt = gimple_build_assign (lhs, PHI_RESULT (newphi)); - mark_symbols_for_renaming (new_stmt); /* 5) Insert that PHI node. */ gsi = gsi_after_labels (join_bb); |