[clang-extdef-mapping] register necessary targest for ms-style asm block

[danix800]

Summary

Without targets registered gives: error: MS-style inline assembly is not available: Unable to find target for this triple (no targets are registered)

[thieta]

Looks fine to me.

[danix800]

I don't have merge permission, can anyone do the merge plz?

[thieta]

Yes, I can do that, but I rather wait for @balazske to also approve this.

[danix800]

Thanks! @thieta

[balazske]

I do not have the knowledge to approve this change.

clang/test/Tooling/ms-asm-clang-extdef-mapping.c

+// RUN: clang-extdef-mapping "%s" -- -fasm-blocks 2>&1 | FileCheck %s
+
+void Break() {
+  __asm { int 3 }
+}
+
+// CHECK: {{c:@F@Break .*}}

clang/tools/clang-extdef-mapping/CMakeLists.txt

 set(LLVM_LINK_COMPONENTS
   ${LLVM_TARGETS_TO_BUILD}
+  AllTargetsAsmParsers
+  AllTargetsDescs
+  AllTargetsInfos
   support
   )
 
 add_clang_tool(clang-extdef-mapping
   ClangExtDefMapGen.cpp
   )
 
 clang_target_link_libraries(clang-extdef-mapping
   PRIVATE
   clangAST
   clangBasic
   clangCrossTU
   clangFrontend
   clangSerialization
   clangTooling
   )

clang/tools/clang-extdef-mapping/ClangExtDefMapGen.cpp

 #include "clang/CrossTU/CrossTranslationUnit.h"
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Frontend/FrontendActions.h"
 #include "clang/Frontend/TextDiagnosticPrinter.h"
 #include "clang/Tooling/CommonOptionsParser.h"
 #include "clang/Tooling/Tooling.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Signals.h"
+#include "llvm/Support/TargetSelect.h"
 #include <optional>
 #include <sstream>
 #include <string>
 
 using namespace llvm;
 using namespace clang;
 using namespace clang::cross_tu;
 using namespace clang::tooling;
int main(int argc, const char **argv) {
   auto ExpectedParser = CommonOptionsParser::create(
       argc, argv, ClangExtDefMapGenCategory, cl::ZeroOrMore, Overview);
   if (!ExpectedParser) {
     llvm::errs() << ExpectedParser.takeError();
     return 1;
   }
   CommonOptionsParser &OptionsParser = ExpectedParser.get();
 
+  llvm::InitializeAllTargetInfos();
+  llvm::InitializeAllTargetMCs();
+  llvm::InitializeAllAsmParsers();
+
   return HandleFiles(OptionsParser.getSourcePathList(),
                      OptionsParser.getCompilations());
 }