diff options
| author | yufeng <yufeng@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-12-05 17:28:08 +0000 |
|---|---|---|
| committer | yufeng <yufeng@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-12-05 17:28:08 +0000 |
| commit | cf6458c391ac0ebec5551104e2f3d19676f9f247 (patch) | |
| tree | 65ea1d9cc7b0918e824467cd9492a4b543b5278f /gcc/gimple-ssa-strength-reduction.c | |
| parent | b2bb3848149fdf5e88ffce206e85455016ae77d9 (diff) | |
| download | gcc-cf6458c391ac0ebec5551104e2f3d19676f9f247.tar.gz | |
gcc/
* gimple-ssa-strength-reduction.c (find_basis_for_candidate): Guard
the get_alternative_base call with flag_expensive_optimizations.
(alloc_cand_and_find_basis): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205713 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gimple-ssa-strength-reduction.c')
| -rw-r--r-- | gcc/gimple-ssa-strength-reduction.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/gimple-ssa-strength-reduction.c b/gcc/gimple-ssa-strength-reduction.c index 8471812b8f1..f5148ea858b 100644 --- a/gcc/gimple-ssa-strength-reduction.c +++ b/gcc/gimple-ssa-strength-reduction.c @@ -437,7 +437,10 @@ static struct pointer_map_t *alt_base_map; /* Given BASE, use the tree affine combiniation facilities to find the underlying tree expression for BASE, with any - immediate offset excluded. */ + immediate offset excluded. + + N.B. we should eliminate this backtracking with better forward + analysis in a future release. */ static tree get_alternative_base (tree base) @@ -565,7 +568,7 @@ find_basis_for_candidate (slsr_cand_t c) } } - if (!basis && c->kind == CAND_REF) + if (flag_expensive_optimizations && !basis && c->kind == CAND_REF) { tree alt_base_expr = get_alternative_base (c->base_expr); if (alt_base_expr) @@ -650,7 +653,7 @@ alloc_cand_and_find_basis (enum cand_kind kind, gimple gs, tree base, c->basis = find_basis_for_candidate (c); record_potential_basis (c, base); - if (kind == CAND_REF) + if (flag_expensive_optimizations && kind == CAND_REF) { tree alt_base = get_alternative_base (base); if (alt_base) |