Break Crankshaft into phases.

src/lithium.cc

Index: src/lithium.cc
diff --git a/src/lithium.cc b/src/lithium.cc
index fd8b7965f1d7497cb1ae29fc05636a47be7a84a3..441d5b1ae610081d0922b316259b222d9e207106 100644
--- a/src/lithium.cc
+++ b/src/lithium.cc
@@ -27,6 +27,20 @@
 
 #include "v8.h"
 #include "lithium.h"
+#include "lithium-allocator.h"
+#include "lithium-allocator-inl.h"
+
+#if V8_TARGET_ARCH_IA32
+#include "ia32/lithium-codegen-ia32.h"
+#elif V8_TARGET_ARCH_X64
+#include "x64/lithium-codegen-x64.h"
+#elif V8_TARGET_ARCH_ARM
+#include "arm/lithium-codegen-arm.h"
+#elif V8_TARGET_ARCH_MIPS
+#include "mips/lithium-codegen-mips.h"
+#else
+#error Unsupported target architecture.
+#endif
 
 namespace v8 {
 namespace internal {
@@ -240,4 +254,46 @@ int ElementsKindToShiftSize(ElementsKind elements_kind) {
 }
 
 
+LChunk* Lithium::CreateChunk(HGraph* graph, HGraphBuilder* graph_builder) {

[danno, 2012/07/11 10:04:57]

Again, adding a dependency on graph builder here is only due to the bailout, and
that doesn't seem right. Pass failure reason back out.

+  int values = graph->GetMaximumValueID();
+  if (values > LUnallocated::kMaxVirtualRegisters) {
+    graph_builder->Bailout("Not enough virtual registers for (values).\n");
+    return NULL;
+  }
+  LAllocator allocator(values, graph);
+  LChunkBuilder builder(graph->info(), graph, &allocator);
+  LChunk* chunk = builder.Build();
+  if (chunk == NULL) return NULL;
+
+  if (!allocator.Allocate(chunk)) {
+    graph_builder->Bailout("Not enough virtual registers (regalloc).\n");
+    return NULL;
+  }
+
+  return chunk;
+}
+
+
+Handle<Code> Lithium::Codegen(LChunk* chunk) {
+  MacroAssembler assembler(chunk->info()->isolate(), NULL, 0);
+  LCodeGen generator(chunk, &assembler, chunk->info());
+
+  chunk->MarkEmptyBlocks();
+
+  if (generator.GenerateCode()) {
+    if (FLAG_trace_codegen) {
+      PrintF("Crankshaft Compiler - ");
+    }
+    CodeGenerator::MakeCodePrologue(chunk->info());
+    Code::Flags flags = Code::ComputeFlags(Code::OPTIMIZED_FUNCTION);
+    Handle<Code> code =
+        CodeGenerator::MakeCodeEpilogue(&assembler, flags, chunk->info());
+    generator.FinishCode(code);
+    CodeGenerator::PrintCode(code, chunk->info());
+    return code;
+  }
+  return Handle<Code>::null();
+}
+
+
 } }  // namespace v8::internal