Moved enum and command-line option in separate file. Also added function that returns the user selected register allocator to the caller.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8819 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
new file mode 100644
index 0000000..86f354e
--- /dev/null
+++ b/lib/CodeGen/Passes.cpp
@@ -0,0 +1,35 @@
+//===-- Passes.cpp - Target independent code generation passes -*- C++ -*-===//
+//
+// This file defines interfaces to access the target independent code
+// generation passes provided by the LLVM backend.
+//
+//===---------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/Passes.h"
+#include "Support/CommandLine.h"
+
+namespace {
+ enum RegAllocName { simple, local };
+
+ cl::opt<RegAllocName>
+ RegAlloc("regalloc",
+ cl::desc("Register allocator to use: (default = simple)"),
+ cl::Prefix,
+ cl::values(clEnumVal(simple, " simple register allocator"),
+ clEnumVal(local, " local register allocator"),
+ 0),
+ cl::init(local));
+}
+
+FunctionPass *createRegisterAllocator()
+{
+ switch (RegAlloc) {
+ case simple:
+ return createSimpleRegisterAllocator();
+ case local:
+ return createLocalRegisterAllocator();
+ default:
+ assert(0 && "no register allocator selected");
+ return 0; // not reached
+ }
+}