d/dmd: Merge upstream dmd 74ac873be

Introduces a fix for a segfault when building without object.d being
present, as well as MinGW host build errors in dmd/root/filename.c.

Updates a couple of non-portable tests, removing one and fixing the
other.

From-SVN: r269897

gcc/d/dmd/MERGE

-8d4c876c658608e8f6e653803c534a9e15618f57
+74ac873be1862090b7ec0e4a876fd1b758520359
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.

gcc/d/dmd/dmodule.c

@@ -302,7 +302,7 @@ bool Module::read(Loc loc)
         {
             ::error(loc, "cannot find source code for runtime library file 'object.d'");
             errorSupplemental(loc, "dmd might not be correctly installed. Run 'dmd -man' for installation instructions.");
-            const char *dmdConfFile = FileName::canonicalName(global.inifilename);
+            const char *dmdConfFile = global.inifilename ? FileName::canonicalName(global.inifilename) : NULL;
             errorSupplemental(loc, "config file: %s", dmdConfFile ? dmdConfFile : "not found");
         }
         else

gcc/d/dmd/root/filename.c

@@ -262,6 +262,7 @@ const char *FileName::name(const char *str)
                 if (e == str + 1 || e == str + len - 1)
                     return e + 1;
 #endif
+                /* falls through */
             default:
                 if (e == str)
                     break;
@@ -542,7 +543,7 @@ int FileName::exists(const char *name)
     int result;
 
     dw = GetFileAttributesA(name);
-    if (dw == -1L)
+    if (dw == INVALID_FILE_ATTRIBUTES)
         result = 0;
     else if (dw & FILE_ATTRIBUTE_DIRECTORY)
         result = 2;
@@ -568,7 +569,7 @@ bool FileName::ensurePathExists(const char *path)
                 size_t len = strlen(path);
                 if ((len > 2 && p[-1] == ':' && strcmp(path + 2, p) == 0) ||
                     len == strlen(p))
-                {   mem.xfree(const_cast<void *>(p));
+                {   mem.xfree(const_cast<char *>(p));
                     return 0;
                 }
 #endif
@@ -621,7 +622,7 @@ const char *FileName::canonicalName(const char *name)
     DWORD result = GetFullPathNameA(name, 0, NULL, NULL);
     if (result)
     {
-        char *buf = (char *)malloc(result);
+        char *buf = (char *)mem.xmalloc(result);
         result = GetFullPathNameA(name, result, buf, NULL);
         if (result == 0)
         {

gcc/testsuite/gdc.test/fail_compilation/fail6451.d

-
-version(GNU)
-{
-    static assert(0);
-}
-version(Win64)
-{
-    static assert(0);
-}
-else version(X86_64)
-{
-    void error(...){}
-}
-else
-{
-    static assert(0);
-}
-

gcc/testsuite/gdc.test/runnable/test4.d

@@ -224,46 +224,26 @@ void test6()
     assert(&t.Bottom < &t.foo2);
 
     assert(TRECT6.foo1.offsetof == 0);
-version (Win32)
-{
-    assert(TRECT6.Left.offsetof == 8);
-    assert(TRECT6.Top.offsetof == 12);
-    assert(TRECT6.Right.offsetof == 16);
-    assert(TRECT6.Bottom.offsetof == 20);
-    assert(TRECT6.TopLeft.offsetof == 8);
-    assert(TRECT6.BottomRight.offsetof == 16);
-    assert(TRECT6.foo2.offsetof == 24);
-}
-else version (X86_64)
-{
-    assert(TRECT6.Left.offsetof == 8);
-    assert(TRECT6.Top.offsetof == 12);
-    assert(TRECT6.Right.offsetof == 16);
-    assert(TRECT6.Bottom.offsetof == 20);
-    assert(TRECT6.TopLeft.offsetof == 8);
-    assert(TRECT6.BottomRight.offsetof == 16);
-    assert(TRECT6.foo2.offsetof == 24);
-}
-else version(ARM)
-{
-    assert(TRECT6.Left.offsetof == 8);
-    assert(TRECT6.Top.offsetof == 12);
-    assert(TRECT6.Right.offsetof == 16);
-    assert(TRECT6.Bottom.offsetof == 20);
-    assert(TRECT6.TopLeft.offsetof == 8);
-    assert(TRECT6.BottomRight.offsetof == 16);
-    assert(TRECT6.foo2.offsetof == 24);
-}
-else
-{
-    assert(TRECT6.Left.offsetof == 4);
-    assert(TRECT6.Top.offsetof == 8);
-    assert(TRECT6.Right.offsetof == 12);
-    assert(TRECT6.Bottom.offsetof == 16);
-    assert(TRECT6.TopLeft.offsetof == 4);
-    assert(TRECT6.BottomRight.offsetof == 12);
-    assert(TRECT6.foo2.offsetof == 20);
-}
+    static if (long.alignof == 8)
+    {
+        assert(TRECT6.Left.offsetof == 8);
+        assert(TRECT6.Top.offsetof == 12);
+        assert(TRECT6.Right.offsetof == 16);
+        assert(TRECT6.Bottom.offsetof == 20);
+        assert(TRECT6.TopLeft.offsetof == 8);
+        assert(TRECT6.BottomRight.offsetof == 16);
+        assert(TRECT6.foo2.offsetof == 24);
+    }
+    else
+    {
+        assert(TRECT6.Left.offsetof == 4);
+        assert(TRECT6.Top.offsetof == 8);
+        assert(TRECT6.Right.offsetof == 12);
+        assert(TRECT6.Bottom.offsetof == 16);
+        assert(TRECT6.TopLeft.offsetof == 4);
+        assert(TRECT6.BottomRight.offsetof == 12);
+        assert(TRECT6.foo2.offsetof == 20);
+    }
 }
 
 /* ================================ */