Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.cpp

@@ -1,85 +0,0 @@
-//===- HexagonTargetTransformInfo.cpp - Hexagon specific TTI pass ---------===//
-//
-//                     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 analysis pass specific to the
-/// Hexagon 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.
-///
-//===----------------------------------------------------------------------===//
-
-#include "HexagonTargetTransformInfo.h"
-#include "HexagonSubtarget.h"
-#include "llvm/Analysis/TargetTransformInfo.h"
-#include "llvm/IR/InstrTypes.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/User.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/CommandLine.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "hexagontti"
-
-static cl::opt<bool> EmitLookupTables("hexagon-emit-lookup-tables",
-  cl::init(true), cl::Hidden,
-  cl::desc("Control lookup table emission on Hexagon target"));
-
-TargetTransformInfo::PopcntSupportKind
-HexagonTTIImpl::getPopcntSupport(unsigned IntTyWidthInBit) const {
-  // Return Fast Hardware support as every input  < 64 bits will be promoted
-  // to 64 bits.
-  return TargetTransformInfo::PSK_FastHardware;
-}
-
-// The Hexagon target can unroll loops with run-time trip counts.
-void HexagonTTIImpl::getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
-                                             TTI::UnrollingPreferences &UP) {
-  UP.Runtime = UP.Partial = true;
-}
-
-unsigned HexagonTTIImpl::getNumberOfRegisters(bool vector) const {
-  return vector ? 0 : 32;
-}
-
-unsigned HexagonTTIImpl::getPrefetchDistance() const {
-  return getST()->getL1PrefetchDistance();
-}
-
-unsigned HexagonTTIImpl::getCacheLineSize() const {
-  return getST()->getL1CacheLineSize();
-}
-
-int HexagonTTIImpl::getUserCost(const User *U,
-                                ArrayRef<const Value *> Operands) {
-  auto isCastFoldedIntoLoad = [](const CastInst *CI) -> bool {
-    if (!CI->isIntegerCast())
-      return false;
-    const LoadInst *LI = dyn_cast<const LoadInst>(CI->getOperand(0));
-    // Technically, this code could allow multiple uses of the load, and
-    // check if all the uses are the same extension operation, but this
-    // should be sufficient for most cases.
-    if (!LI || !LI->hasOneUse())
-      return false;
-
-    // Only extensions from an integer type shorter than 32-bit to i32
-    // can be folded into the load.
-    unsigned SBW = CI->getSrcTy()->getIntegerBitWidth();
-    unsigned DBW = CI->getDestTy()->getIntegerBitWidth();
-    return DBW == 32 && (SBW < DBW);
-  };
-
-  if (const CastInst *CI = dyn_cast<const CastInst>(U))
-    if (isCastFoldedIntoLoad(CI))
-      return TargetTransformInfo::TCC_Free;
-  return BaseT::getUserCost(U, Operands);
-}
-
-bool HexagonTTIImpl::shouldBuildLookupTables() const {
-   return EmitLookupTables;
-}