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* tree-affine.c (tree_to_aff_combination): Handle (T1)(X + X).

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From-SVN: r248956
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Bin Cheng 2017-06-07 10:47:26 +00:00 committed by Bin Cheng
parent 1b92ccde2c
commit 8813f50d2c
2 changed files with 21 additions and 10 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2017-06-07 Bin Cheng <bin.cheng@arm.com>
* tree-affine.c (tree_to_aff_combination): Handle (T1)(X + X).
2017-06-07 Bin Cheng <bin.cheng@arm.com>
(aff_combination_expand): Move (T1)(X *+- CST) simplification to ...

27
gcc/tree-affine.c
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@ -375,17 +375,24 @@ tree_to_aff_combination (tree expr, tree type, aff_tree *comb)
if ((icode == PLUS_EXPR || icode == MINUS_EXPR || icode == MULT_EXPR)
&& TREE_CODE (itype) == INTEGER_TYPE
&& TREE_CODE (otype) == INTEGER_TYPE
&& TYPE_PRECISION (otype) > TYPE_PRECISION (itype)
&& TYPE_OVERFLOW_UNDEFINED (itype)
&& TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
&& TYPE_PRECISION (otype) > TYPE_PRECISION (itype))
{
/* Convert (T1)(X *+- CST) into (T1)X *+- (T1)CST if X's type has
undefined overflow behavior. */
tree op0 = fold_convert (otype, TREE_OPERAND (inner, 0));
tree op1 = fold_convert (otype, TREE_OPERAND (inner, 1));
expr = fold_build2 (icode, otype, op0, op1);
tree_to_aff_combination (expr, type, comb);
return;
tree op0 = TREE_OPERAND (inner, 0), op1 = TREE_OPERAND (inner, 1);
/* If inner type has undefined overflow behavior, fold conversion
for below two cases:
(T1)(X *+- CST) -> (T1)X *+- (T1)CST
(T1)(X + X) -> (T1)X + (T1)X. */
if (TYPE_OVERFLOW_UNDEFINED (itype)
&& (TREE_CODE (op1) == INTEGER_CST
|| (icode == PLUS_EXPR && operand_equal_p (op0, op1, 0))))
{
op0 = fold_convert (otype, op0);
op1 = fold_convert (otype, op1);
expr = fold_build2 (icode, otype, op0, op1);
tree_to_aff_combination (expr, type, comb);
return;
}
}
}
break;