-FunctionPass *createRegisterAllocator()
-{
- switch (RegAlloc) {
- case simple:
- return createSimpleRegisterAllocator();
- case local:
- return createLocalRegisterAllocator();
- default:
- assert(0 && "no register allocator selected");
- return 0; // not reached
+//===---------------------------------------------------------------------===//
+///
+/// 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() {
+ RegisterRegAlloc::FunctionPassCtor Ctor = RegisterRegAlloc::getDefault();
+
+ if (!Ctor) {
+ Ctor = RegAlloc;
+ RegisterRegAlloc::setDefault(RegAlloc);