d: Merge upstream dmd 568496d5b, druntime 178c44ff, phobos 574bf883b.

D front-end changes:

    - Import dmd v2.098.0
    - New ImportC module for compiling preprocessed C11 code into D.
    - New -ftransition=in switch.
    - Improved handling of new 'noreturn' type.

Druntime changes:

    - Import druntime v2.098.0
    - Fix broken import in core.sys.linux.perf_event module (PR103558).

Phobos changes:

    - Import phobos v2.098.0
    - All sources are now compiled with -fpreview=fieldwise.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 568496d5b.
	* Make-lang.in (D_FRONTEND_OBJS): Add d/common-file.o,
	d/common-outbuffer.o, d/common-string.o, d/file_manager.o,
	d/importc.o.  Remove d/root-outbuffer.o.
	(d/common-%.o): New recipe.
	* d-builtins.cc (build_frontend_type): Update for new front-end
	interface.
	(d_build_d_type_nodes): Set noreturn_type_node.
	* d-codegen.cc (d_build_call): Don't call function if one of the
	arguments is type 'noreturn'.
	(build_vthis_function): Propagate TYPE_QUAL_VOLATILE from original
	function type.
	* d-frontend.cc (eval_builtin): Update signature.
	(getTypeInfoType): Likewise.
	(toObjFile): New function.
	* d-gimplify.cc (d_gimplify_call_expr): Always evaluate arguments from
	left to right.
	* d-lang.cc (d_handle_option): Handle OPT_ftransition_in.
	(d_parse_file): Don't generate D main if it is declared in user code.
	* d-tree.h (CALL_EXPR_ARGS_ORDERED): Remove.
	(enum d_tree_index): Add DTI_BOTTOM_TYPE.
	(noreturn_type_node): New.
	* decl.cc (apply_pragma_crt): Remove.
	(DeclVisitor::visit): Update for new front-end interface.
	(DeclVisitor::visit (PragmaDeclaration *)): Don't handle
	crt_constructor and crt_destructor pragmas.
	(DeclVisitor::visit (VarDeclaration *)): Don't generate declarations
	of type 'noreturn'.
	(DeclVisitor::visit (FuncDeclaration *)): Stop adding parameters when
	'noreturn' type has been encountered.
	(get_symbol_decl): Set DECL_STATIC_CONSTRUCTOR and
	DECL_STATIC_DESTRUCTOR on decl node if requested.
	(aggregate_initializer_decl): Update for new front-end interface.
	* expr.cc (ExprVisitor::visit (CallExp *)): Always use the 'this'
	object as the result of calling any constructor function.
	(ExprVisitor::visit): Update for new front-end interface.
	* gdc.texi (Runtime Options): Document -fmain and -ftransition=in.
	* lang.opt (ftransition=in): New option.
	* modules.cc (get_internal_fn): Update for new front-end interface.
	* types.cc (TypeVisitor::visit): Likewise.
	(TypeVisitor::visit (TypeNoreturn *)): Return noreturn_type_node.
	(TypeVisitor::visit (TypeFunction *)): Stop adding parameters when
	'notreturn' type has been encountered.  Qualify function types that
	return 'noreturn' as TYPE_QUAL_VOLATILE.

libphobos/ChangeLog:

	PR d/103558
	* libdruntime/MERGE: Merge upstream druntime 178c44ff.
	* libdruntime/Makefile.am (DRUNTIME_DSOURCES_LINUX): Add
	core/sys/linux/syscalls.d.
	(DRUNTIME_DSOURCES_OPENBSD): Add core/sys/openbsd/pthread_np.d.
	* libdruntime/Makefile.in: Regenerate.
	* src/MERGE: Merge upstream phobos 574bf883b.
	* src/Makefile.am (D_EXTRA_DFLAGS): Add -fpreview=fieldwise.
	* src/Makefile.in: Regenerate.
	* testsuite/libphobos.exceptions/assert_fail.d: Update test.
	* testsuite/libphobos.betterc/test22336.d: New test.

1 files changed, 21 insertions, 31 deletions

diff --git a/libphobos/src/std/stdio.d b/libphobos/src/std/stdio.d
index a88beb8..d3097d5 100644
--- a/libphobos/src/std/stdio.d
+++ b/libphobos/src/std/stdio.d
@@ -281,17 +281,14 @@ else version (GENERIC_IO)
     nothrow:
     @nogc:
 
-    private int _FPUTC(int c, _iobuf* fp) { return fputc(c, cast(shared) fp); }
-    private int _FPUTWC(wchar_t c, _iobuf* fp)
+    extern (C) private
     {
-        import core.stdc.wchar_ : fputwc;
-        return fputwc(c, cast(shared) fp);
-    }
-    private int _FGETC(_iobuf* fp) { return fgetc(cast(shared) fp); }
-    private int _FGETWC(_iobuf* fp)
-    {
-        import core.stdc.wchar_ : fgetwc;
-        return fgetwc(cast(shared) fp);
+        static import core.stdc.wchar_;
+
+        pragma(mangle, fputc.mangleof) int _FPUTC(int c, _iobuf* fp);
+        pragma(mangle, core.stdc.wchar_.fputwc.mangleof) int _FPUTWC(wchar_t c, _iobuf* fp);
+        pragma(mangle, fgetc.mangleof) int _FGETC(_iobuf* fp);
+        pragma(mangle, core.stdc.wchar_.fgetwc.mangleof) int _FGETWC(_iobuf* fp);
     }
 
     version (Posix)
@@ -307,27 +304,19 @@ else version (GENERIC_IO)
     // @@@DEPRECATED_2.107@@@
     deprecated("internal function fputc_unlocked was unintentionally available "
                ~ "from std.stdio and will be removed afer 2.107")
-    int fputc_unlocked(int c, _iobuf* fp) { return fputc(c, cast(shared) fp); }
+    extern (C) pragma(mangle, fputc.mangleof) int fputc_unlocked(int c, _iobuf* fp);
     // @@@DEPRECATED_2.107@@@
     deprecated("internal function fputwc_unlocked was unintentionally available "
                ~ "from std.stdio and will be removed afer 2.107")
-    int fputwc_unlocked(wchar_t c, _iobuf* fp)
-    {
-        import core.stdc.wchar_ : fputwc;
-        return fputwc(c, cast(shared) fp);
-    }
+    extern (C) pragma(mangle, core.stdc.wchar_.fputwc.mangleof) int fputwc_unlocked(wchar_t c, _iobuf* fp);
     // @@@DEPRECATED_2.107@@@
     deprecated("internal function fgetc_unlocked was unintentionally available "
                ~ "from std.stdio and will be removed afer 2.107")
-    int fgetc_unlocked(_iobuf* fp) { return fgetc(cast(shared) fp); }
+    extern (C) pragma(mangle, fgetc.mangleof) int fgetc_unlocked(_iobuf* fp);
     // @@@DEPRECATED_2.107@@@
     deprecated("internal function fgetwc_unlocked was unintentionally available "
                ~ "from std.stdio and will be removed afer 2.107")
-    int fgetwc_unlocked(_iobuf* fp)
-    {
-        import core.stdc.wchar_ : fgetwc;
-        return fgetwc(cast(shared) fp);
-    }
+    extern (C) pragma(mangle, core.stdc.wchar_.fgetwc.mangleof) int fgetwc_unlocked(_iobuf* fp);
 
     // @@@DEPRECATED_2.107@@@
     deprecated("internal alias FPUTC was unintentionally available from "
@@ -363,6 +352,16 @@ else
     static assert(0, "unsupported C I/O system");
 }
 
+private extern (C) @nogc nothrow
+{
+    pragma(mangle, _FPUTC.mangleof) int trustedFPUTC(int ch, _iobuf* h) @trusted;
+
+    version (DIGITAL_MARS_STDIO)
+        pragma(mangle, _FPUTWC.mangleof) int trustedFPUTWC(int ch, _iobuf* h) @trusted;
+    else
+        pragma(mangle, _FPUTWC.mangleof) int trustedFPUTWC(wchar_t ch, _iobuf* h) @trusted;
+}
+
 static if (__traits(compiles, core.sys.posix.stdio.getdelim))
 {
     extern(C) nothrow @nogc
@@ -3183,16 +3182,7 @@ is empty, throws an `Exception`. In case of an I/O error throws
         /// ditto
         void put(C)(scope C c) @safe if (isSomeChar!C || is(C : const(ubyte)))
         {
-            import std.traits : Parameters;
             import std.utf : decodeFront, encode, stride;
-            static auto trustedFPUTC(int ch, _iobuf* h) @trusted
-            {
-                return _FPUTC(ch, h);
-            }
-            static auto trustedFPUTWC(Parameters!_FPUTWC[0] ch, _iobuf* h) @trusted
-            {
-                return _FPUTWC(ch, h);
-            }
 
             static if (c.sizeof == 1)
             {