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re PR c++/92414 (internal compiler error: tree check: expected constructor, have error_mark in cxx_eval_store_expression, at cp/constexpr.c:4009) 

PR c++/92414
	* constexpr.c (cxx_eval_outermost_constant_expr): If DECL_INITIAL
	on object is erroneous, return t without trying to evaluate
	a constexpr dtor.

	* g++.dg/cpp2a/constexpr-dtor4.C: New test.

From-SVN: r278468
This commit is contained in:
Jakub Jelinek 2019-11-19 22:28:22 +01:00 committed by Jakub Jelinek
parent 8d5d90878e
commit fce6467b1e
4 changed files with 30 additions and 1 deletions
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7
gcc/cp/ChangeLog
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@ -1,3 +1,10 @@
2019-11-19 Jakub Jelinek <jakub@redhat.com>
PR c++/92414
* constexpr.c (cxx_eval_outermost_constant_expr): If DECL_INITIAL
on object is erroneous, return t without trying to evaluate
a constexpr dtor.
2019-11-12 Jason Merrill <jason@redhat.com>
* call.c (same_fn_or_template): Change to cand_parms_match.

2
gcc/cp/constexpr.c
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@ -5834,6 +5834,8 @@ cxx_eval_outermost_constant_expr (tree t, bool allow_non_constant,
gcc_assert (object && VAR_P (object));
gcc_assert (DECL_DECLARED_CONSTEXPR_P (object));
gcc_assert (DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (object));
if (error_operand_p (DECL_INITIAL (object)))
return t;
ctx.ctor = unshare_expr (DECL_INITIAL (object));
TREE_READONLY (ctx.ctor) = false;
/* Temporarily force decl_really_constant_value to return false

7
gcc/testsuite/ChangeLog
View File

@ -1,9 +1,14 @@
2019-11-19 Jakub Jelinek <jakub@redhat.com>
PR c++/92414
* g++.dg/cpp2a/constexpr-dtor4.C: New test.
2019-11-19 Dragan Mladjenovic <dmladjenovic@wavecomp.com>
* gcc.target/mips/msa-ds.c: New test.
2019-11-19 Richard Sandiford <richard.sandiford@arm.com>
gcc/
Revert:
2019-11-18 Richard Sandiford <richard.sandiford@arm.com>

15
gcc/testsuite/g++.dg/cpp2a/constexpr-dtor4.C Normal file
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@ -0,0 +1,15 @@
// PR c++/92414
// { dg-do compile { target c++2a } }
struct A { virtual void foo (); };
struct B : A {
constexpr B (int); // { dg-warning "used but never defined" }
constexpr ~B () { }
};
struct D : B {
constexpr D () : B (42) { } // { dg-error "used before its definition" }
};
constexpr D d; // { dg-message "in 'constexpr' expansion of" }