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Call compute_overall_effect_of_inner_loop from instantiate_scev_name.

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2010-06-09  Sebastian Pop  <sebastian.pop@amd.com>

	* tree-scalar-evolution.c (instantiate_scev_name): Do not fail
	the scev analysis when the variable is not used outside the loop
	in a close phi node: call compute_overall_effect_of_inner_loop.

From-SVN: r160510
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Sebastian Pop 2010-06-09 22:09:41 +00:00 committed by Sebastian Pop
parent c12e2a5fcb
commit 7472eb13e9
2 changed files with 19 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-06-09 Sebastian Pop <sebastian.pop@amd.com>
* tree-scalar-evolution.c (instantiate_scev_name): Do not fail
the scev analysis when the variable is not used outside the loop
in a close phi node: call compute_overall_effect_of_inner_loop.
2010-06-09 Sebastian Pop <sebastian.pop@amd.com>
* graphite-sese-to-poly.c (single_pred_cond): Renamed

16
gcc/tree-scalar-evolution.c
View File

@ -2172,9 +2172,19 @@ instantiate_scev_name (basic_block instantiate_below,
else
res = chrec;
if (res == NULL_TREE
|| !dominated_by_p (CDI_DOMINATORS, instantiate_below,
gimple_bb (SSA_NAME_DEF_STMT (res))))
/* When there is no loop_closed_phi_def, it means that the
variable is not used after the loop: try to still compute the
value of the variable when exiting the loop. */
if (res == NULL_TREE)
{
loop_p loop = loop_containing_stmt (SSA_NAME_DEF_STMT (chrec));
res = analyze_scalar_evolution (loop, chrec);
res = compute_overall_effect_of_inner_loop (loop, res);
res = instantiate_scev_r (instantiate_below, evolution_loop, res,
fold_conversions, cache, size_expr);
}
else if (!dominated_by_p (CDI_DOMINATORS, instantiate_below,
gimple_bb (SSA_NAME_DEF_STMT (res))))
res = chrec_dont_know;
}