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PR c++/80473 allow suppressing notes about over-aligned new 

gcc/cp:

	PR c++/80473
	* init.c (build_new_1): Suppress notes about over-aligned new when
	the warning is suppressed.

gcc/testsuite:

	PR c++/80473
	* g++.dg/diagnostic/pr80473.C: New test.

From-SVN: r247033
This commit is contained in:
Jonathan Wakely 2017-04-20 19:02:05 +01:00 committed by Jonathan Wakely
parent 2260d19d4b
commit 34d57a10c4
4 changed files with 36 additions and 7 deletions
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6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2017-04-20 Jonathan Wakely <jwakely@redhat.com>
PR c++/80473
* init.c (build_new_1): Suppress notes about over-aligned new when
the warning is suppressed.
2017-04-20 Volker Reichelt <v.reichelt@netcologne.de> 2017-04-20 Volker Reichelt <v.reichelt@netcologne.de>
* parser.c (cp_parser_member_declaration): Add warning with fixit * parser.c (cp_parser_member_declaration): Add warning with fixit

16
gcc/cp/init.c
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@ -3126,13 +3126,15 @@ build_new_1 (vec<tree, va_gc> **placement, tree type, tree nelts,
|| CP_DECL_CONTEXT (alloc_fn) == global_namespace) || CP_DECL_CONTEXT (alloc_fn) == global_namespace)
&& !aligned_allocation_fn_p (alloc_fn)) && !aligned_allocation_fn_p (alloc_fn))
{ {
warning (OPT_Waligned_new_, "%<new%> of type %qT with extended " if (warning (OPT_Waligned_new_, "%<new%> of type %qT with extended "
"alignment %d", elt_type, TYPE_ALIGN_UNIT (elt_type)); "alignment %d", elt_type, TYPE_ALIGN_UNIT (elt_type)))
inform (input_location, "uses %qD, which does not have an alignment " {
"parameter", alloc_fn); inform (input_location, "uses %qD, which does not have an alignment "
if (!aligned_new_threshold) "parameter", alloc_fn);
inform (input_location, "use %<-faligned-new%> to enable C++17 " if (!aligned_new_threshold)
"over-aligned new support"); inform (input_location, "use %<-faligned-new%> to enable C++17 "
"over-aligned new support");
}
} }
/* If we found a simple case of PLACEMENT_EXPR above, then copy it /* If we found a simple case of PLACEMENT_EXPR above, then copy it

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-04-20 Jonathan Wakely <jwakely@redhat.com>
PR c++/80473
* g++.dg/diagnostic/pr80473.C: New test.
2017-04-20 Volker Reichelt <v.reichelt@netcologne.de> 2017-04-20 Volker Reichelt <v.reichelt@netcologne.de>
* g++.dg/warn/Wextra-semi.C: New test. * g++.dg/warn/Wextra-semi.C: New test.

16
gcc/testsuite/g++.dg/diagnostic/pr80473.C Normal file
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@ -0,0 +1,16 @@
// { dg-options "-Wall -w" }
// { dg-do compile { target c++11 } }
// { dg-bogus "over-aligned new" "PR c++/80473" { target *-*-* } 0 }
template<typename T> T&& declval();
template<typename T, typename U, typename = void>
struct is_constructible { enum { value = 0 }; };
template<typename T, typename U>
struct is_constructible<T, U, decltype(::new T(declval<U>()), void())>
{ enum { value = 1 }; };
struct alignas(64) A { int i; };
constexpr bool b = is_constructible<A, A>::value;