Add mechanism to select register allocator to use
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5079 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index d710eb4..cdb7dea 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -8,11 +8,17 @@
#include "llvm/Transforms/Scalar.h"
#include "llvm/Target/TargetMachineImpls.h"
#include "llvm/CodeGen/MachineFunction.h"
-#include "Support/Statistic.h"
#include "llvm/PassManager.h"
#include "X86.h"
+#include "Support/CommandLine.h"
+#include "Support/Statistic.h"
#include <iostream>
+namespace {
+ cl::opt<bool> UseLocalRA("local-ra",
+ cl::desc("Use Local RegAlloc instead of Simple RA"));
+}
+
// allocateX86TargetMachine - Allocate and return a subclass of TargetMachine
// that implements the X86 backend.
//
@@ -43,7 +49,10 @@
DEBUG(PM.add(createMachineFunctionPrinterPass()));
// Perform register allocation to convert to a concrete x86 representation
- PM.add(createSimpleRegisterAllocator(*this));
+ if (UseLocalRA)
+ PM.add(createLocalRegisterAllocator(*this));
+ else
+ PM.add(createSimpleRegisterAllocator(*this));
// Print the instruction selected machine code...
// PM.add(createMachineFunctionPrinterPass());