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From-SVN: r968
This commit is contained in:
Richard Stallman 1992-05-13 05:02:10 +00:00
parent 94a5807610
commit d8f6dbb911
1 changed files with 6 additions and 2 deletions
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8
gcc/fold-const.c
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@ -2748,9 +2748,13 @@ fold (expr)
return convert (TREE_TYPE (t), TREE_OPERAND (TREE_OPERAND (t, 0), 0));
if (TREE_CODE (TREE_OPERAND (t, 0)) == MODIFY_EXPR
&& TREE_CONSTANT (TREE_OPERAND (TREE_OPERAND (t, 0), 1)))
&& TREE_CONSTANT (TREE_OPERAND (TREE_OPERAND (t, 0), 1))
/* Detect assigning a bitfield. */
&& !(TREE_CODE (TREE_OPERAND (TREE_OPERAND (t, 0), 0)) == COMPONENT_REF
&& DECL_BIT_FIELD (TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (t, 0), 0), 1))))
{
/* Don't leave an assignment inside a conversion. */
/* Don't leave an assignment inside a conversion
unless assiging a bitfield. */
tree prev = TREE_OPERAND (t, 0);
TREE_OPERAND (t, 0) = TREE_OPERAND (prev, 1);
/* First do the assignment, then return converted constant. */