attached patch file.
On Tue, Oct 22, 2019 at 10:00 PM kamlesh kumar <kamleshbha...@gmail.com> wrote:
>
> bootstrap and regtested on x86_64.
>
> Changelog:
> gcc
> ------
> 2019-10-22 Kamlesh Kumar <kamleshbha...@gmail.com>
>
> PR c++/91979 - mangling nullptr expression
> * mangle.c (write_template_arg_literal): Handle nullptr
> mangling.
> * testsuite/g++.dg/cpp0x/nullptr27.C: Modify Test.
> * testsuite/g++.dg/cpp0x/pr91979.C: New Test.
>
> libiberty
> -----------
> 2019-10-22 Kamlesh Kumar <kamleshbha...@gmail.com>
>
> * cp-demangle.c (d_expr_primary): Handle
> nullptr demangling.
> * testsuite/demangle-expected: Added test.
> =========================================================
>
>
>
>
> diff --git a/gcc/cp/mangle.c b/gcc/cp/mangle.c
> index a9333b8..780da9f 100644
> --- a/gcc/cp/mangle.c
> +++ b/gcc/cp/mangle.c
> @@ -3400,7 +3400,8 @@ write_template_arg_literal (const tree value)
> case INTEGER_CST:
> gcc_assert (!same_type_p (TREE_TYPE (value), boolean_type_node)
> || integer_zerop (value) || integer_onep (value));
> - write_integer_cst (value);
> + if (TREE_CODE(TREE_TYPE(value)) != NULLPTR_TYPE)
> + write_integer_cst (value);
> break;
>
> case REAL_CST:
> diff --git a/gcc/testsuite/g++.dg/cpp0x/nullptr27.C
> b/gcc/testsuite/g++.dg/cpp0x/nullptr27.C
> index 2510dc8..edd1160 100644
> --- a/gcc/testsuite/g++.dg/cpp0x/nullptr27.C
> +++ b/gcc/testsuite/g++.dg/cpp0x/nullptr27.C
> @@ -1,7 +1,7 @@
> // PR c++/52706
> // { dg-do compile { target c++11 } }
> // { dg-options "-fabi-version=0" }
> -// { dg-final { scan-assembler "_Z1fIDnLDn0EEiT_" } }
> +// { dg-final { scan-assembler "_Z1fIDnLDnEEiT_" } }
>
> template<class T, decltype(nullptr) = nullptr>
> int f(T);
> diff --git a/gcc/testsuite/g++.dg/cpp0x/pr91979.C
> b/gcc/testsuite/g++.dg/cpp0x/pr91979.C
> new file mode 100644
> index 0000000..7fcd56b
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/cpp0x/pr91979.C
> @@ -0,0 +1,15 @@
> +// PR c++/91989
> +// { dg-do compile { target c++11 } }
> +// { dg-final { scan-assembler
> "_Z3fooILPv0EEvPN9enable_ifIXeqT_LDnEEvE4typeE" } }
> +
> +template <bool, typename T = void>
> +struct enable_if {};
> +
> +template <typename T>
> +struct enable_if<true, T> { typedef T type; };
> +
> +template <void *P>
> +void foo(typename enable_if<P == nullptr>::type* = 0) {}
> +
> +template void foo<(void *)0>(void *);
> +
> diff --git a/libiberty/cp-demangle.c b/libiberty/cp-demangle.c
> index aa78c86..3e6b6fb 100644
> --- a/libiberty/cp-demangle.c
> +++ b/libiberty/cp-demangle.c
> @@ -3577,6 +3577,16 @@ d_expr_primary (struct d_info *di)
> && type->u.s_builtin.type->print != D_PRINT_DEFAULT)
> di->expansion -= type->u.s_builtin.type->len;
>
> + if (type->type == DEMANGLE_COMPONENT_BUILTIN_TYPE
> + &&
> strncmp(type->u.s_builtin.type->name,cplus_demangle_builtin_types[33].name,17)
> == 0)
> + {
> + if (d_peek_char (di) == 'E')
> + {
> + d_advance (di, 1);
> + return type;
> + }
> + }
> +
> /* Rather than try to interpret the literal value, we just
> collect it as a string. Note that it's possible to have a
> floating point literal here. The ABI specifies that the
> diff --git a/libiberty/testsuite/demangle-expected
> b/libiberty/testsuite/demangle-expected
> index f21ed00..b23a7c2 100644
> --- a/libiberty/testsuite/demangle-expected
> +++ b/libiberty/testsuite/demangle-expected
> @@ -1446,3 +1446,7 @@ Foo<int>()::X::fn
> _ZZZ3FooIiEfvENKUlT_E_clIcEEDaS0_EN1X2fnEv
> Foo<int>()::{lambda(auto:1)#1}::operator()<char>(char) const::X::fn()
> Foo<int>()::{lambda(auto:1)#1}::operator()<char>(char) const::X::fn
> +#PR91979 demangling nullptr expression
> +
> +_Z3fooILPv0EEvPN9enable_ifIXeqT_LDnEEvE4typeE
> +void foo<(void*)0>(enable_if<((void*)0)==((decltype(nullptr))), void>::type*)
>
> ./Kamlesh
pr91979.patch
Description: Binary data
