[GlobalISel] Introduce initializer method to support start/stop-after features.

llvm-svn: 262896

llvm/include/llvm/InitializePasses.h

@@ -56,6 +56,9 @@ void initializeAnalysis(PassRegistry&);
 /// initializeCodeGen - Initialize all passes linked into the CodeGen library.
 void initializeCodeGen(PassRegistry&);
 
+/// Initialize all passes linked into the GlobalISel library.
+void initializeGlobalISel(PassRegistry &Registry);
+
 /// initializeCodeGen - Initialize all passes linked into the CodeGen library.
 void initializeTarget(PassRegistry&);
 
@@ -151,6 +154,7 @@ void initializeInstCountPass(PassRegistry&);
 void initializeInstNamerPass(PassRegistry&);
 void initializeInternalizePassPass(PassRegistry&);
 void initializeIntervalPartitionPass(PassRegistry&);
+void initializeIRTranslatorPass(PassRegistry &);
 void initializeJumpThreadingPass(PassRegistry&);
 void initializeLCSSAPass(PassRegistry&);
 void initializeLICMPass(PassRegistry&);

llvm/lib/CodeGen/GlobalISel/CMakeLists.txt

@@ -18,7 +18,7 @@ endif()
 # not ask for it. 
 add_llvm_library(LLVMGlobalISel
         ${GLOBAL_ISEL_BUILD_FILES}
-        EmptyFile.cpp
+        GlobalISel.cpp
   )
 
 add_dependencies(LLVMGlobalISel intrinsics_gen)

llvm/lib/CodeGen/GlobalISel/EmptyFile.cpp

@@ -1,24 +0,0 @@
-//===-- llvm/CodeGen/GlobalISel/EmptyFile.cpp ------ EmptyFile ---*- C++ -*-==//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-/// \file
-/// The purpose of this file is to please cmake by not creating an
-/// empty library when we do not build GlobalISel.
-/// \todo This file should be removed when GlobalISel is not optional anymore.
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Support/Compiler.h"
-
-
-namespace llvm {
-// Export a global symbol so that ranlib does not complain
-// about the TOC being empty for the global-isel library when
-// we do not build global-isel.
-LLVM_ATTRIBUTE_UNUSED void DummyFunctionToSilenceRanlib(void) {
-}
-}

llvm/lib/CodeGen/GlobalISel/GlobalISel.cpp

@@ -0,0 +1,29 @@
+//===-- llvm/CodeGen/GlobalISel/GlobalIsel.cpp --- GlobalISel ----*- C++ -*-==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+// This file implements the common initialization routines for the
+// GlobalISel library.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/InitializePasses.h"
+#include "llvm/PassRegistry.h"
+
+using namespace llvm;
+
+#ifndef LLVM_BUILD_GLOBAL_ISEL
+
+void llvm::initializeGlobalISel(PassRegistry &Registry) {
+}
+
+#else
+
+void llvm::initializeGlobalISel(PassRegistry &Registry) {
+  initializeIRTranslatorPass(Registry);
+}
+#endif // LLVM_BUILD_GLOBAL_ISEL

llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp

@@ -27,8 +27,11 @@
 using namespace llvm;
 
 char IRTranslator::ID = 0;
+INITIALIZE_PASS(IRTranslator, "irtranslator", "IRTranslator LLVM IR -> MI",
+                false, false);
 
 IRTranslator::IRTranslator() : MachineFunctionPass(ID), MRI(nullptr) {
+  initializeIRTranslatorPass(*PassRegistry::getPassRegistry());
 }
 
 unsigned IRTranslator::getOrCreateVReg(const Value *Val) {