Remove the target hook TargetInstrInfo::BlockHasNoFallThrough in favor of

[oota-llvm.git] / lib / CodeGen / Passes.cpp

diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index 435d6b5627ffa69a2749492bd79744259497ff6a..f67eb79be3e1c8828a2f4cc82328062075b49fed 100644 (file)
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -12,38 +12,43 @@
 //
 //===---------------------------------------------------------------------===//
 
+#include "llvm/CodeGen/RegAllocRegistry.h"
 #include "llvm/CodeGen/Passes.h"
-#include "llvm/Support/CommandLine.h"
-#include <iostream>
+
 using namespace llvm;
 
-namespace {
-  enum RegAllocName { simple, local, linearscan };
+//===---------------------------------------------------------------------===//
+///
+/// RegisterRegAlloc class - Track the registration of register allocators.
+///
+//===---------------------------------------------------------------------===//
+MachinePassRegistry RegisterRegAlloc::Registry;
 
-  static cl::opt<RegAllocName>
-  RegAlloc(
-    "regalloc",
-    cl::desc("Register allocator to use: (default = linearscan)"),
-    cl::Prefix,
-    cl::values(
-       clEnumVal(simple,        "  simple register allocator"),
-       clEnumVal(local,         "  local register allocator"),
-       clEnumVal(linearscan,    "  linear scan register allocator"),
-       clEnumValEnd),
-    cl::init(linearscan));
-}
 
+//===---------------------------------------------------------------------===//
+///
+/// RegAlloc command line options.
+///
+//===---------------------------------------------------------------------===//
+static cl::opt<RegisterRegAlloc::FunctionPassCtor, false,
+               RegisterPassParser<RegisterRegAlloc> >
+RegAlloc("regalloc",
+         cl::init(&createLinearScanRegisterAllocator),
+         cl::desc("Register allocator to use: (default = linearscan)")); 
+
+
+//===---------------------------------------------------------------------===//
+///
+/// createRegisterAllocator - choose the appropriate register allocator.
+///
+//===---------------------------------------------------------------------===//
 FunctionPass *llvm::createRegisterAllocator() {
-  switch (RegAlloc) {
-  default:
-    std::cerr << "no register allocator selected";
-    abort();
-  case simple:
-    return createSimpleRegisterAllocator();
-  case local:
-    return createLocalRegisterAllocator();
-  case linearscan:
-    return createLinearScanRegisterAllocator();
+  RegisterRegAlloc::FunctionPassCtor Ctor = RegisterRegAlloc::getDefault();
+  
+  if (!Ctor) {
+    Ctor = RegAlloc;
+    RegisterRegAlloc::setDefault(RegAlloc);
   }
+  
+  return Ctor();
 }
-