[WIP][turbofan] Instruction scheduler for Turbofan.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index c7deb3095aebb654c33ad2233f6f27d3c477bb65..ed9034d2bc7a062d2b24e4297ad727a1e59ee70a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -750,6 +750,8 @@ source_set("v8_base") {
     "src/compiler/greedy-allocator.cc",
     "src/compiler/greedy-allocator.h",
     "src/compiler/instruction-codes.h",
+    "src/compiler/instruction-scheduler.cc",
+    "src/compiler/instruction-scheduler.h",
     "src/compiler/instruction-selector-impl.h",
     "src/compiler/instruction-selector.cc",
     "src/compiler/instruction-selector.h",
@@ -1296,6 +1298,7 @@ source_set("v8_base") {
       "src/crankshaft/ia32/lithium-ia32.h",
       "src/compiler/ia32/code-generator-ia32.cc",
       "src/compiler/ia32/instruction-codes-ia32.h",
+      "src/compiler/ia32/instruction-scheduler-ia32.cc",
       "src/compiler/ia32/instruction-selector-ia32.cc",
       "src/debug/ia32/debug-ia32.cc",
       "src/full-codegen/ia32/full-codegen-ia32.cc",
@@ -1327,6 +1330,7 @@ source_set("v8_base") {
     sources += [
       "src/compiler/x64/code-generator-x64.cc",
       "src/compiler/x64/instruction-codes-x64.h",
+      "src/compiler/x64/instruction-scheduler-x64.cc",
       "src/compiler/x64/instruction-selector-x64.cc",
       "src/crankshaft/x64/lithium-codegen-x64.cc",
       "src/crankshaft/x64/lithium-codegen-x64.h",
@@ -1385,6 +1389,7 @@ source_set("v8_base") {
       "src/arm/simulator-arm.h",
       "src/compiler/arm/code-generator-arm.cc",
       "src/compiler/arm/instruction-codes-arm.h",
+      "src/compiler/arm/instruction-scheduler-arm.cc",
       "src/compiler/arm/instruction-selector-arm.cc",
       "src/crankshaft/arm/lithium-arm.cc",
       "src/crankshaft/arm/lithium-arm.h",
@@ -1437,6 +1442,7 @@ source_set("v8_base") {
       "src/arm64/utils-arm64.h",
       "src/compiler/arm64/code-generator-arm64.cc",
       "src/compiler/arm64/instruction-codes-arm64.h",
+      "src/compiler/arm64/instruction-scheduler-arm64.cc",
       "src/compiler/arm64/instruction-selector-arm64.cc",
       "src/crankshaft/arm64/delayed-masm-arm64.cc",
       "src/crankshaft/arm64/delayed-masm-arm64.h",
@@ -1461,6 +1467,7 @@ source_set("v8_base") {
     sources += [
       "src/compiler/mips/code-generator-mips.cc",
       "src/compiler/mips/instruction-codes-mips.h",
+      "src/compiler/mips/instruction-scheduler-mips.cc",
       "src/compiler/mips/instruction-selector-mips.cc",
       "src/crankshaft/mips/lithium-codegen-mips.cc",
       "src/crankshaft/mips/lithium-codegen-mips.h",
@@ -1502,6 +1509,7 @@ source_set("v8_base") {
     sources += [
       "compiler/mips64/code-generator-mips64.cc",
       "compiler/mips64/instruction-codes-mips64.h",
+      "compiler/mips64/instruction-scheduler-mips64.cc",
       "compiler/mips64/instruction-selector-mips64.cc",
       "src/crankshaft/mips64/lithium-codegen-mips64.cc",
       "src/crankshaft/mips64/lithium-codegen-mips64.h",