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tree-ssa-loop-ivopts.c (get_computation_cost_at): Don't clobber cbase.

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* tree-ssa-loop-ivopts.c (get_computation_cost_at): Don't clobber
	cbase.

From-SVN: r235805
This commit is contained in:
Bin Cheng 2016-05-03 08:38:18 +00:00 committed by Bin Cheng
parent fb2647aaf5
commit e0db140205
2 changed files with 12 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-05-03 Bin Cheng <bin.cheng@arm.com>
* tree-ssa-loop-ivopts.c (get_computation_cost_at): Don't clobber
cbase.
2016-05-03 Oleg Endo <olegendo@gcc.gnu.org>
* config/sh/sh.md (udivsi3, divsi3, mulsi3): Simplify.

12
gcc/tree-ssa-loop-ivopts.c
View File

@ -4814,17 +4814,19 @@ get_computation_cost_at (struct ivopts_data *data,
(ratio, mem_mode,
TYPE_ADDR_SPACE (TREE_TYPE (utype))))
{
tree real_cbase = cbase;
if (cstepi == 0 && stmt_is_after_inc)
{
if (POINTER_TYPE_P (ctype))
cbase = fold_build2 (POINTER_PLUS_EXPR, ctype, cbase, cstep);
real_cbase = fold_build2 (POINTER_PLUS_EXPR, ctype, cbase, cstep);
else
cbase = fold_build2 (PLUS_EXPR, ctype, cbase, cstep);
real_cbase = fold_build2 (PLUS_EXPR, ctype, cbase, cstep);
}
cbase
= fold_build2 (MULT_EXPR, ctype, cbase, build_int_cst (ctype, ratio));
real_cbase = fold_build2 (MULT_EXPR, ctype, real_cbase,
build_int_cst (ctype, ratio));
cost = difference_cost (data,
ubase, cbase,
ubase, real_cbase,
&symbol_present, &var_present, &offset,
depends_on);
cost.cost /= avg_loop_niter (data->current_loop);