[SandboxIR][NFC] Move Region from SandboxVectorizer to SandboxIR.

I'm planning to add RegionPass and RegionPassManager next to the
equivalent FunctionPass and FunctionPassManager in SandboxIR, which
means that SandboxIR has to kwow about Regions.

There's nothing vectorizer-specific about the Region class, so this is
a straightforward file move.

Author: slackito

llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Region.h renamed to llvm/include/llvm/SandboxIR/Region.h

@@ -3,6 +3,7 @@ add_llvm_component_library(LLVMSandboxIR
   Module.cpp
   Pass.cpp
   PassManager.cpp
+  Region.cpp
   SandboxIR.cpp
   Tracker.cpp
   Type.cpp

llvm/lib/SandboxIR/CMakeLists.txt

@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Transforms/Vectorize/SandboxVectorizer/Region.h"
+#include "llvm/SandboxIR/Region.h"
 
 namespace llvm::sandboxir {
 

llvm/lib/Transforms/Vectorize/SandboxVectorizer/Region.cpp renamed to llvm/lib/SandboxIR/Region.cpp

@@ -5,7 +5,6 @@ add_llvm_component_library(LLVMVectorize
   LoopVectorize.cpp
   SandboxVectorizer/DependencyGraph.cpp
   SandboxVectorizer/Passes/BottomUpVec.cpp
-  SandboxVectorizer/Region.cpp
   SandboxVectorizer/SandboxVectorizer.cpp
   SLPVectorizer.cpp
   Vectorize.cpp

llvm/lib/Transforms/Vectorize/CMakeLists.txt

@@ -7,6 +7,7 @@ set(LLVM_LINK_COMPONENTS
 
 add_llvm_unittest(SandboxIRTests
   PassTest.cpp
+  RegionTest.cpp
   SandboxIRTest.cpp
   TrackerTest.cpp
   TypesTest.cpp

llvm/unittests/SandboxIR/CMakeLists.txt

@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Transforms/Vectorize/SandboxVectorizer/Region.h"
+#include "llvm/SandboxIR/Region.h"
 #include "llvm/AsmParser/Parser.h"
 #include "llvm/SandboxIR/SandboxIR.h"
 #include "llvm/Support/SourceMgr.h"

llvm/unittests/Transforms/Vectorize/SandboxVectorizer/RegionTest.cpp renamed to llvm/unittests/SandboxIR/RegionTest.cpp

@@ -11,5 +11,4 @@ add_llvm_unittest(SandboxVectorizerTests
   DependencyGraphTest.cpp
   InstrIntervalTest.cpp
   LegalityTest.cpp
-  RegionTest.cpp
   )