[turbofan] add configuration parameters for register allocator

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index a7d5ed14949f3c0c4863e20ca0c16760e88ac7ec..cd6f8426204a1497621954d6db61ab77a83b761e 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -578,7 +578,9 @@ Handle<Code> Pipeline::GenerateCode(Linkage* linkage, PipelineData* data) {
     debug_name = GetDebugName(info());
 #endif
 
-    RegisterAllocator allocator(zone_scope.zone(), &frame, &sequence,
+
+    RegisterAllocator allocator(RegisterAllocator::PlatformConfig(),
+                                zone_scope.zone(), &frame, &sequence,
                                 debug_name.get());
     if (!allocator.Allocate(data->pipeline_statistics())) {
       info()->AbortOptimization(kNotEnoughVirtualRegistersRegalloc);