d: Merge dmd, druntime 6884b433d2, phobos 48d581a1f

D front-end changes:

	- It's now deprecated to declare `auto ref' parameters without
	  putting those two keywords next to each other.
        - An error is now given for case fallthough for multivalued
	  cases.
        - An error is now given for constructors with field destructors
	  with stricter attributes.
        - An error is now issued for `in'/`out' contracts of `nothrow'
	  functions that may throw.
	- `auto ref' can now be applied to local, static, extern, and
	  global variables.

D runtime changes:

        - Import latest fixes from druntime v2.110.0-beta.1.

Phobos changes:

        - Import latest fixes from phobos v2.110.0-beta.1.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd 6884b433d2.
	* d-builtins.cc (build_frontend_type): Update for new front-end
	interface.
	(d_build_builtins_module): Likewise.
	(matches_builtin_type): Likewise.
	(covariant_with_builtin_type_p): Likewise.
	* d-codegen.cc (lower_struct_comparison): Likewise.
	(call_side_effect_free_p): Likewise.
	* d-compiler.cc (Compiler::paintAsType): Likewise.
	* d-convert.cc (convert_expr): Likewise.
	(convert_for_assignment): Likewise.
	* d-target.cc (Target::isVectorTypeSupported): Likewise.
	(Target::isVectorOpSupported): Likewise.
	(Target::isReturnOnStack): Likewise.
	* decl.cc (get_symbol_decl): Likewise.
	* expr.cc (build_return_dtor): Likewise.
	* imports.cc (class ImportVisitor): Likewise.
	* toir.cc (class IRVisitor): Likewise.
	* types.cc (class TypeVisitor): Likewise.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime 6884b433d2.
	* src/MERGE: Merge upstream phobos 48d581a1f.

7 files changed, 15 insertions, 3 deletions

diff --git a/libphobos/libdruntime/MERGE b/libphobos/libdruntime/MERGE
index a6072c4570d..654fbed86d8 100644
--- a/libphobos/libdruntime/MERGE
+++ b/libphobos/libdruntime/MERGE
@@ -1,4 +1,4 @@
-34875cd6e1faa42e84ae953c0485ef524fe67e38
+6884b433d21d9b6356e5c83ffc6eb06a62a5cad1
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.
diff --git a/libphobos/libdruntime/core/attribute.d b/libphobos/libdruntime/core/attribute.d
index 95a67ea219d..2b35b8d7c0e 100644
--- a/libphobos/libdruntime/core/attribute.d
+++ b/libphobos/libdruntime/core/attribute.d
@@ -13,6 +13,9 @@
  *         Makes an Objective-C interface method optional.)
  * $(TROW $(LREF selector), Objective-C,
  *          Attaches an Objective-C selector to a method.)
+ * $(TROW $(LREF standalone),,
+ *          Marks a shared module constructor as not depending on any
+ *          other module constructor being run first.)
  * $(TROW $(LREF weak),,
  *         Specifies that a global symbol should be emitted with weak linkage.)
  * )
diff --git a/libphobos/libdruntime/core/lifetime.d b/libphobos/libdruntime/core/lifetime.d
index f3dab3624ac..7010d2ad3b0 100644
--- a/libphobos/libdruntime/core/lifetime.d
+++ b/libphobos/libdruntime/core/lifetime.d
@@ -1699,7 +1699,7 @@ template forward(args...)
         {
             x_ = forward!x;
         }
-        this()(auto const ref X x)
+        this()(auto ref const X x)
         {
             x_ = forward!x;
         }
diff --git a/libphobos/libdruntime/core/stdcpp/allocator.d b/libphobos/libdruntime/core/stdcpp/allocator.d
index a574cd39e8b..872f5975e1e 100644
--- a/libphobos/libdruntime/core/stdcpp/allocator.d
+++ b/libphobos/libdruntime/core/stdcpp/allocator.d
@@ -299,9 +299,10 @@ version (CppRuntime_Microsoft)
     {
         enum size_t _Big_allocation_threshold = 4096;
         enum size_t _Big_allocation_alignment = 32;
+        enum isPowerOf2(size_t v) = v && !(v & (v - 1));
 
         static assert(2 * (void*).sizeof <= _Big_allocation_alignment, "Big allocation alignment should at least match vector register alignment");
-        static assert((v => v != 0 && (v & (v - 1)) == 0)(_Big_allocation_alignment), "Big allocation alignment must be a power of two");
+        static assert(isPowerOf2!_Big_allocation_alignment, "Big allocation alignment must be a power of two");
         static assert(size_t.sizeof == (void*).sizeof, "uintptr_t is not the same size as size_t");
 
         // NOTE: this must track `_DEBUG` macro used in C++...
diff --git a/libphobos/libdruntime/core/sys/freebsd/unistd.d b/libphobos/libdruntime/core/sys/freebsd/unistd.d
index 493cda1c8c9..ebb7afa2726 100644
--- a/libphobos/libdruntime/core/sys/freebsd/unistd.d
+++ b/libphobos/libdruntime/core/sys/freebsd/unistd.d
@@ -17,3 +17,5 @@ extern(C):
 nothrow:
 
 int getosreldate() pure @trusted;
+
+void closefrom(int);
diff --git a/libphobos/libdruntime/core/sys/linux/unistd.d b/libphobos/libdruntime/core/sys/linux/unistd.d
index faa226cf407..548870268db 100644
--- a/libphobos/libdruntime/core/sys/linux/unistd.d
+++ b/libphobos/libdruntime/core/sys/linux/unistd.d
@@ -5,6 +5,7 @@ public import core.sys.posix.unistd;
 version (linux):
 extern(C):
 nothrow:
+@nogc:
 
 // Additional seek constants for sparse file handling
 // from Linux's unistd.h, stdio.h, and linux/fs.h
@@ -21,3 +22,6 @@ char* getpass(const(char)* prompt);
 
 // Exit all threads in a process
 void exit_group(int status);
+
+/// Close all open file descriptors greater or equal to `lowfd`
+void closefrom(int lowfd);
diff --git a/libphobos/libdruntime/core/sys/openbsd/unistd.d b/libphobos/libdruntime/core/sys/openbsd/unistd.d
index 4232c036049..9618543d8da 100644
--- a/libphobos/libdruntime/core/sys/openbsd/unistd.d
+++ b/libphobos/libdruntime/core/sys/openbsd/unistd.d
@@ -19,3 +19,5 @@ int getthrname(pid_t, char*, size_t);
 int pledge(const scope char*, const scope char*);
 int setthrname(pid_t, const scope char*);
 int unveil(const scope char*, const scope char*);
+
+int closefrom(int);