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tree-ssa-pre.c (phi_translate_1): Remove redundant constant folding of references.

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2017-11-17  Richard Biener  <rguenther@suse.de>

	* tree-ssa-pre.c (phi_translate_1): Remove redundant constant
	folding of references.

From-SVN: r254858
This commit is contained in:
Richard Biener 2017-11-17 09:06:54 +00:00
parent fa30ba9949
commit c5e8a8c94a
2 changed files with 9 additions and 16 deletions
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7
gcc/ChangeLog
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@ -1,4 +1,9 @@
2017-11-15 Qing Zhao <qing.zhao@oracle.com>
2017-11-17 Richard Biener <rguenther@suse.de>
* tree-ssa-pre.c (phi_translate_1): Remove redundant constant
folding of references.
2017-11-17 Qing Zhao <qing.zhao@oracle.com>
PR middle-end/78809
* gimple-fold.c (gimple_fold_builtin_string_compare): Add handling

18
gcc/tree-ssa-pre.c
View File

@ -1566,7 +1566,6 @@ phi_translate_1 (pre_expr expr, bitmap_set_t set1, bitmap_set_t set2,
if (changed || newvuse != vuse)
{
unsigned int new_val_id;
pre_expr constant;
tree result = vn_reference_lookup_pieces (newvuse, ref->set,
ref->type,
@ -1611,15 +1610,7 @@ phi_translate_1 (pre_expr expr, bitmap_set_t set1, bitmap_set_t set2,
expr->id = 0;
if (newref)
{
PRE_EXPR_REFERENCE (expr) = newref;
constant = fully_constant_expression (expr);
if (constant != expr)
return constant;
new_val_id = newref->value_id;
get_or_alloc_expression_id (expr);
}
new_val_id = newref->value_id;
else
{
if (changed || !same_valid)
@ -1637,12 +1628,9 @@ phi_translate_1 (pre_expr expr, bitmap_set_t set1, bitmap_set_t set2,
newoperands,
result, new_val_id);
newoperands = vNULL;
PRE_EXPR_REFERENCE (expr) = newref;
constant = fully_constant_expression (expr);
if (constant != expr)
return constant;
get_or_alloc_expression_id (expr);
}
PRE_EXPR_REFERENCE (expr) = newref;
get_or_alloc_expression_id (expr);
add_to_value (new_val_id, expr);
}
newoperands.release ();