[GlobalISel] Add the skeleton of the RegBankSelect pass.

This pass is reponsible for assigning the generic virtual registers to register
banks.

llvm-svn: 265440

3 files changed, 34 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/CMakeLists.txt b/llvm/lib/CodeGen/GlobalISel/CMakeLists.txt
index 8b4bf8d830e..bb6225f031a 100644
--- a/llvm/lib/CodeGen/GlobalISel/CMakeLists.txt
+++ b/llvm/lib/CodeGen/GlobalISel/CMakeLists.txt
@@ -2,6 +2,7 @@
 set(GLOBAL_ISEL_FILES
       IRTranslator.cpp
       MachineIRBuilder.cpp
+      RegBankSelect.cpp
       )
 
 # Add GlobalISel files to the dependencies if the user wants to build it.
diff --git a/llvm/lib/CodeGen/GlobalISel/GlobalISel.cpp b/llvm/lib/CodeGen/GlobalISel/GlobalISel.cpp
index f6857f1bd40..231e5ac82be 100644
--- a/llvm/lib/CodeGen/GlobalISel/GlobalISel.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/GlobalISel.cpp
@@ -25,5 +25,6 @@ void llvm::initializeGlobalISel(PassRegistry &Registry) {
 
 void llvm::initializeGlobalISel(PassRegistry &Registry) {
   initializeIRTranslatorPass(Registry);
+  initializeRegBankSelectPass(Registry);
 }
 #endif // LLVM_BUILD_GLOBAL_ISEL
diff --git a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
new file mode 100644
index 00000000000..7f1e9d9a653
--- /dev/null
+++ b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
@@ -0,0 +1,32 @@
+//===- llvm/CodeGen/GlobalISel/RegBankSelect.cpp - RegBankSelect -*- 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 RegBankSelect class.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/GlobalISel/RegBankSelect.h"
+
+#define DEBUG_TYPE "regbankselect"
+
+using namespace llvm;
+
+char RegBankSelect::ID = 0;
+INITIALIZE_PASS(RegBankSelect, "regbankselect",
+                "Assign register bank of generic virtual registers",
+                false, false);
+
+RegBankSelect::RegBankSelect() : MachineFunctionPass(ID), RBI(nullptr) {
+  initializeRegBankSelectPass(*PassRegistry::getPassRegistry());
+}
+
+bool RegBankSelect::runOnMachineFunction(MachineFunction &MF) {
+  // Avoid unused field member warning.
+  (void)RBI;
+  return false;
+}