Added command line option for linear scan allocator
llvm-svn: 8804
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index 60f8bbc..e58ac31 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -16,6 +16,14 @@
#include "Support/Statistic.h"
namespace {
+ cl::opt<RegAllocName>
+ RegAlloc("regalloc",
+ cl::desc("Register allocator to use:"), cl::Prefix,
+ cl::values(clEnumVal(simple, "simple register allocator)"),
+ clEnumVal(local, "local register allocator"),
+ clEnumVal(linearscan, "linear scan global register allocator")),
+ cl::init(local));
+
cl::opt<bool> NoLocalRA("disable-local-ra",
cl::desc("Use Simple RA instead of Local RegAlloc"));
cl::opt<bool> PrintCode("print-machineinstrs",
@@ -113,10 +121,19 @@
PM.add(createMachineFunctionPrinterPass());
// Perform register allocation to convert to a concrete x86 representation
- if (NoLocalRA)
+ switch (RegAlloc) {
+ case simple:
PM.add(createSimpleRegisterAllocator());
- else
+ break;
+ case local:
PM.add(createLocalRegisterAllocator());
+ break;
+ case linearscan:
+ PM.add(createLinearScanRegisterAllocator());
+ break;
+ default:
+ assert(0 && "no register allocator selected");
+ }
if (PrintCode)
PM.add(createMachineFunctionPrinterPass());