[turbofan] Add instruction latency modeling for ia32 and x64 platform

src/compiler/ia32/instruction-scheduler-ia32.cc

Index: src/compiler/ia32/instruction-scheduler-ia32.cc
diff --git a/src/compiler/ia32/instruction-scheduler-ia32.cc b/src/compiler/ia32/instruction-scheduler-ia32.cc
index ad7535c7c7a9bba52b754d7c6a810aec7eb2ba35..3216b1de0bf657e66bf56f67f2be8a5f35a51dcb 100644
--- a/src/compiler/ia32/instruction-scheduler-ia32.cc
+++ b/src/compiler/ia32/instruction-scheduler-ia32.cc
@@ -146,8 +146,72 @@ int InstructionScheduler::GetTargetInstructionFlags(
 
 
 int InstructionScheduler::GetInstructionLatency(const Instruction* instr) {
-  // TODO(all): Add instruction cost modeling.
-  return 1;
+  // Basic latency modeling for ia32 instructions. They have been determined
+  // in an empirical way.
+  switch (instr->arch_opcode()) {
+    case kCheckedLoadInt8:
+    case kCheckedLoadUint8:
+    case kCheckedLoadInt16:
+    case kCheckedLoadUint16:
+    case kCheckedLoadWord32:
+    case kCheckedLoadFloat32:
+    case kCheckedLoadFloat64:
+    case kCheckedStoreWord8:
+    case kCheckedStoreWord16:
+    case kCheckedStoreWord32:
+    case kCheckedStoreFloat32:
+    case kCheckedStoreFloat64:
+    case kSSEFloat64Mul:
+      return 5;
+    case kIA32Imul:
+    case kIA32ImulHigh:
+      return 5;
+    case kSSEFloat32Cmp:
+    case kSSEFloat64Cmp:
+      return 9;
+    case kSSEFloat32Add:
+    case kSSEFloat32Sub:
+    case kSSEFloat32Abs:
+    case kSSEFloat32Neg:
+    case kSSEFloat64Add:
+    case kSSEFloat64Sub:
+    case kSSEFloat64Max:
+    case kSSEFloat64Min:
+    case kSSEFloat64Abs:
+    case kSSEFloat64Neg:
+      return 5;
+    case kSSEFloat32Mul:
+      return 4;
+    case kSSEFloat32ToFloat64:
+    case kSSEFloat64ToFloat32:
+      return 6;
+    case kSSEFloat32Round:
+    case kSSEFloat64Round:
+    case kSSEFloat32ToInt32:
+    case kSSEFloat64ToInt32:
+      return 8;
+    case kSSEFloat32ToUint32:
+      return 21;
+    case kSSEFloat64ToUint32:
+      return 15;
+    case kIA32Idiv:
+      return 33;
+    case kIA32Udiv:
+      return 26;
+    case kSSEFloat32Div:
+      return 35;
+    case kSSEFloat64Div:
+      return 63;
+    case kSSEFloat32Sqrt:
+    case kSSEFloat64Sqrt:
+      return 25;
+    case kSSEFloat64Mod:
+      return 50;
+    case kArchTruncateDoubleToI:
+      return 9;
+    default:
+      return 1;
+  }
 }
 
 }  // namespace compiler