Remove Emscripten support

lib/Target/JSBackend/JSTargetTransformInfo.cpp

Index: lib/Target/JSBackend/JSTargetTransformInfo.cpp
diff --git a/lib/Target/JSBackend/JSTargetTransformInfo.cpp b/lib/Target/JSBackend/JSTargetTransformInfo.cpp
deleted file mode 100644
index def8550639a92a9bfec7aaee357caf340d23956d..0000000000000000000000000000000000000000
--- a/lib/Target/JSBackend/JSTargetTransformInfo.cpp
+++ /dev/null
@@ -1,100 +0,0 @@
-//===-- JSTargetTransformInfo.cpp - JS specific TTI  ------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-/// \file
-/// This file implements a TargetTransformInfo::Concept conforming object
-/// specific to the JS target machine. It uses the target's detailed information
-/// to provide more precise answers to certain TTI queries, while letting the
-/// target independent and default TTI implementations handle the rest.
-///
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "jstti"
-#include "JS.h"
-#include "JSTargetMachine.h"
-#include "JSTargetTransformInfo.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Target/TargetLowering.h"
-#include "llvm/Target/CostTable.h"
-using namespace llvm;
-
-//===----------------------------------------------------------------------===//
-//
-// JS cost model.
-//
-//===----------------------------------------------------------------------===//
-
-TargetTransformInfo::PopcntSupportKind JSTTI::getPopcntSupport(
-    unsigned TyWidth) {
-  assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2");
-  // Hopefully we'll get popcnt in ES7, but for now, we just have software.
-  return TargetTransformInfo::PSK_Software;
-}
-
-unsigned JSTTI::getRegisterBitWidth(bool Vector) const {
-  if (Vector) {
-    return 128;
-  }
-
-  return 32;
-}
-
-unsigned JSTTI::getArithmeticInstrCost(
-    unsigned Opcode, Type *Ty, TTI::OperandValueKind Opd1Info,
-    TTI::OperandValueKind Opd2Info, TTI::OperandValueProperties Opd1PropInfo,
-    TTI::OperandValueProperties Opd2PropInfo) {
-  const unsigned Nope = 65536;
-
-  unsigned Cost = BasicTTIImplBase<JSTTI>::getArithmeticInstrCost(Opcode, Ty, Opd1Info, Opd2Info);
-
-  if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
-    switch (VTy->getNumElements()) {
-    case 4:
-      // SIMD.js supports int32x4 and float32x4, and we can emulate <4 x i1>.
-      if (!VTy->getElementType()->isIntegerTy(1) &&
-          !VTy->getElementType()->isIntegerTy(32) &&
-          !VTy->getElementType()->isFloatTy())
-      {
-          return Nope;
-      }
-      break;
-    default:
-      // Wait until the other types are optimized.
-      return Nope;
-    }
-
-    switch (Opcode) {
-      case Instruction::LShr:
-      case Instruction::AShr:
-      case Instruction::Shl:
-        // SIMD.js' shifts are currently only ByScalar.
-        if (Opd2Info != TTI::OK_UniformValue && Opd2Info != TTI::OK_UniformConstantValue)
-          Cost = Cost * VTy->getNumElements() + 100;
-        break;
-    }
-  }
-
-  return Cost;
-}
-
-unsigned JSTTI::getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index) {
-  unsigned Cost = BasicTTIImplBase::getVectorInstrCost(Opcode, Val, Index);
-
-  // SIMD.js' insert/extract currently only take constant indices.
-  if (Index == -1u)
-      return Cost + 100;
-
-  return Cost;
-}
-
-void JSTTI::getUnrollingPreferences(Loop *L,
-                                    TTI::UnrollingPreferences &UP) const {
-  // We generally don't want a lot of unrolling.
-  UP.Partial = false;
-  UP.Runtime = false;
-}