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fold-const.c (maybe_lvalue_p): Return false for M(IN|AX)_EXPR.

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* fold-const.c (maybe_lvalue_p): Return false for M(IN|AX)_EXPR.
	(extract_muldiv_1) <MINUS_EXPR>: Swap operands if necessary.
	* stor-layout.c (layout_type) <ARRAY_TYPE>: Do not take the maximum
	of the length and zero.

From-SVN: r152217
This commit is contained in:
Eric Botcazou 2009-09-27 12:36:43 +00:00 committed by Eric Botcazou
parent 464778c074
commit ffaf6f258a
3 changed files with 20 additions and 12 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2009-09-27 Eric Botcazou <ebotcazou@adacore.com>
* fold-const.c (maybe_lvalue_p): Return false for M(IN|AX)_EXPR.
(extract_muldiv_1) <MINUS_EXPR>: Swap operands if necessary.
* stor-layout.c (layout_type) <ARRAY_TYPE>: Do not take the maximum
of the length and zero.
2009-09-27 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* Makefile.in (TOPLEV_H): Use $(INPUT_H) not input.h.

16
gcc/fold-const.c
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@ -2830,8 +2830,6 @@ maybe_lvalue_p (const_tree x)
case TARGET_EXPR:
case COND_EXPR:
case BIND_EXPR:
case MIN_EXPR:
case MAX_EXPR:
break;
default:
@ -6512,7 +6510,19 @@ extract_muldiv_1 (tree t, tree c, enum tree_code code, tree wide_type,
/* If this was a subtraction, negate OP1 and set it to be an addition.
This simplifies the logic below. */
if (tcode == MINUS_EXPR)
tcode = PLUS_EXPR, op1 = negate_expr (op1);
{
tcode = PLUS_EXPR, op1 = negate_expr (op1);
/* If OP1 was not easily negatable, the constant may be OP0. */
if (TREE_CODE (op0) == INTEGER_CST)
{
tree tem = op0;
op0 = op1;
op1 = tem;
tem = t1;
t1 = t2;
t2 = tem;
}
}
if (TREE_CODE (op1) != INTEGER_CST)
break;

9
gcc/stor-layout.c
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@ -1968,15 +1968,6 @@ layout_type (tree type)
TREE_TYPE (lb),
ub, lb)));
/* If neither bound is a constant and sizetype is signed, make
sure the size is never negative. We should really do this
if *either* bound is non-constant, but this is the best
compromise between C and Ada. */
if (!TYPE_UNSIGNED (sizetype)
&& TREE_CODE (TYPE_MIN_VALUE (index)) != INTEGER_CST
&& TREE_CODE (TYPE_MAX_VALUE (index)) != INTEGER_CST)
length = size_binop (MAX_EXPR, length, size_zero_node);
TYPE_SIZE (type) = size_binop (MULT_EXPR, element_size,
fold_convert (bitsizetype,
length));