[unittests] Move TargetRegistry test from Support to MC

This removes the dependency from SupportTests to all of the LLVM
backends, and makes it link faster.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@259705 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/MC/CMakeLists.txt

@@ -9,5 +9,6 @@ add_llvm_unittest(MCTests
   Disassembler.cpp
   DwarfLineTables.cpp
   StringTableBuilderTest.cpp
+  TargetRegistry.cpp
   YAMLTest.cpp
   )

unittests/Support/TargetRegistry.cpp → unittests/MC/TargetRegistry.cpp

@@ -1,4 +1,4 @@
-//===- unittests/Support/TargetRegistry.cpp - -----------------------------===//
+//===- unittests/MC/TargetRegistry.cpp ------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,6 +7,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+// The target registry code lives in Support, but it relies on linking in all
+// LLVM targets. We keep this test with the MC tests, which already do that, to
+// keep the SupportTests target small.
+
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/TargetSelect.h"
 #include "gtest/gtest.h"

unittests/Support/CMakeLists.txt

@@ -1,5 +1,4 @@
 set(LLVM_LINK_COMPONENTS
-  ${LLVM_TARGETS_TO_BUILD}
   Support
   )
 
@@ -39,7 +38,6 @@ add_llvm_unittest(SupportTests
   StreamingMemoryObject.cpp
   StringPool.cpp
   SwapByteOrderTest.cpp
-  TargetRegistry.cpp
   ThreadLocalTest.cpp
   ThreadPool.cpp
   TimerTest.cpp