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gimple-ssa-strength-reduction.c (find_basis_for_candidate): Guard the get_alternative_base call with flag_expensive_optimizations.

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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.

From-SVN: r205713
This commit is contained in:
Yufeng Zhang 2013-12-05 17:28:08 +00:00 • committed by Yufeng Zhang
parent 8c8952918b
commit 8fde427f4f
2 changed files with 12 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2013-12-05 Yufeng Zhang <yufeng.zhang@arm.com>
* 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.
2013-12-05 Tejas Belagod <tejas.belagod@arm.com>
* rtlanal.c (set_noop_p): Return nonzero in case of redundant vec_select

9
gcc/gimple-ssa-strength-reduction.c
View file

@ -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)