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

1 files changed, 35 insertions, 0 deletions

diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
new file mode 100644
index 0000000000..86f354eb32
--- /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
+  }
+}