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re PR c++/63940 (C++ constexpr errors on AIX)

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PR c++/63940
	* constexpr.c (cxx_eval_binary_expression): Don't assume the
	expression was already folded.
	(cxx_eval_unary_expression): Likewise.

From-SVN: r217738
This commit is contained in:
Jason Merrill 2014-11-18 16:14:49 -05:00 committed by Jason Merrill
parent 2bf86c845a
commit f899317ec2
2 changed files with 30 additions and 6 deletions
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7
gcc/cp/ChangeLog
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@ -1,3 +1,10 @@
2014-11-18 Jason Merrill <jason@redhat.com>
PR c++/63940
* constexpr.c (cxx_eval_binary_expression): Don't assume the
expression was already folded.
(cxx_eval_unary_expression): Likewise.
2014-11-18 Marc Glisse <marc.glisse@inria.fr>
PR libstdc++/43622

29
gcc/cp/constexpr.c
View File

@ -1461,9 +1461,17 @@ cxx_eval_unary_expression (const constexpr_ctx *ctx, tree t,
addr, non_constant_p, overflow_p,
NULL);
VERIFY_CONSTANT (arg);
if (arg == orig_arg)
return t;
r = fold_build1 (TREE_CODE (t), TREE_TYPE (t), arg);
location_t loc = EXPR_LOCATION (t);
enum tree_code code = TREE_CODE (t);
tree type = TREE_TYPE (t);
r = fold_unary_loc (loc, code, type, arg);
if (r == NULL_TREE)
{
if (arg == orig_arg)
r = t;
else
r = build1_loc (loc, code, type, arg);
}
VERIFY_CONSTANT (r);
return r;
}
@ -1488,9 +1496,18 @@ cxx_eval_binary_expression (const constexpr_ctx *ctx, tree t,
allow_non_constant, addr,
non_constant_p, overflow_p, NULL);
VERIFY_CONSTANT (rhs);
if (lhs == orig_lhs && rhs == orig_rhs)
return t;
r = fold_build2 (TREE_CODE (t), TREE_TYPE (t), lhs, rhs);
location_t loc = EXPR_LOCATION (t);
enum tree_code code = TREE_CODE (t);
tree type = TREE_TYPE (t);
r = fold_binary_loc (loc, code, type, lhs, rhs);
if (r == NULL_TREE)
{
if (lhs == orig_lhs && rhs == orig_rhs)
r = t;
else
r = build2_loc (loc, code, type, lhs, rhs);
}
VERIFY_CONSTANT (r);
return r;
}