[svn r305] Started support for custom class allocators/deallocators. Allocators with more than one argument still need to be fixed.

Removed the LLVM stacktrace code from mars.c.
Moved the LLVM based default target detection code from mars.c to llvmhelpers.cpp.

dmd/mars.c

@@ -7,9 +7,6 @@
 // in artistic.txt, or the GNU General Public License in gnu.txt.
 // See the included readme.txt for details.
 
-#include "llvm/Target/TargetMachineRegistry.h"
-#include "llvm/System/Signals.h"
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
@@ -42,6 +39,9 @@
 
 void getenv_setargv(const char *envvar, int *pargc, char** *pargv);
 
+// llvmdc
+void findDefaultTarget();
+
 Global global;
 
 Global::Global()
@@ -225,8 +225,6 @@ Usage:\n\
 
 int main(int argc, char *argv[])
 {
-    llvm::sys::PrintStackTraceOnErrorSignal();
-
     int i;
     Array files;
     char *p;
@@ -690,21 +688,7 @@ int main(int argc, char *argv[])
     bool allowForceEndianness = false;
 
     if (global.params.llvmArch == 0) {
-        std::string err_str;
-        const llvm::TargetMachineRegistry::entry* e = llvm::TargetMachineRegistry::getClosestTargetForJIT(err_str);
-        if (e == 0) {
-            error("Failed to find a default target machine: %s", err_str.c_str());
-            fatal();
-        }
-        else {
-            global.params.llvmArch = const_cast<char*>(e->Name);
-            if (global.params.verbose || very_verbose)
-            printf("Default target found: %s\n", global.params.llvmArch);
-            if (very_verbose) {
-                int X = sizeof(va_list);
-                printf("valist.sizeof = %d\n", X);
-            }
-        }
+        findDefaultTarget();
     }
 
     bool is_x86 = false;
@@ -717,7 +701,6 @@ int main(int argc, char *argv[])
         tt_arch = "i686";
         data_layout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-f80:32:32-v64:64:64-v128:128:128-a0:0:64";
         is_x86 = true;
-        
     }
     else if (strcmp(global.params.llvmArch,"x86-64")==0) {
         VersionCondition::addPredefinedGlobalIdent("X86_64");