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c-fold.c (c_fully_fold_internal): Save the c_fully_fold_internal result for SAVE_EXPR operand and set...

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* c-fold.c (c_fully_fold_internal): Save the c_fully_fold_internal
	result for SAVE_EXPR operand and set SAVE_EXPR_FOLDED_P even if
	it returned invariant.  Call tree_invariant_p unconditionally
	afterwards to decide whether to return expr or op0.

From-SVN: r248347
This commit is contained in:
Jakub Jelinek 2017-05-22 20:55:29 +02:00 • committed by Jakub Jelinek
parent 655e52652b
commit d11c168a67
2 changed files with 13 additions and 10 deletions
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7
gcc/c/ChangeLog
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@ -1,3 +1,10 @@
2017-05-22 Jakub Jelinek <jakub@redhat.com>
* c-fold.c (c_fully_fold_internal): Save the c_fully_fold_internal
result for SAVE_EXPR operand and set SAVE_EXPR_FOLDED_P even if
it returned invariant. Call tree_invariant_p unconditionally
afterwards to decide whether to return expr or op0.
2017-05-22 Nathan Sidwell <nathan@acm.org>
* c-decl.c (c_parse_final_cleanups): Drop TDI_tu handling.

16
gcc/c/c-fold.c
View file

@ -566,21 +566,17 @@ c_fully_fold_internal (tree expr, bool in_init, bool *maybe_const_operands,
case SAVE_EXPR:
/* Make sure to fold the contents of a SAVE_EXPR exactly once. */
op0 = TREE_OPERAND (expr, 0);
if (!SAVE_EXPR_FOLDED_P (expr))
{
op0 = TREE_OPERAND (expr, 0);
op0 = c_fully_fold_internal (op0, in_init, maybe_const_operands,
maybe_const_itself, for_int_const);
/* Don't wrap the folded tree in a SAVE_EXPR if we don't
have to. */
if (tree_invariant_p (op0))
ret = op0;
else
{
TREE_OPERAND (expr, 0) = op0;
SAVE_EXPR_FOLDED_P (expr) = true;
}
TREE_OPERAND (expr, 0) = op0;
SAVE_EXPR_FOLDED_P (expr) = true;
}
/* Return the SAVE_EXPR operand if it is invariant. */
if (tree_invariant_p (op0))
ret = op0;
goto out;
default: