1 files changed, 0 insertions, 175 deletions
diff --git a/lib/Target/Mips/MipsOptimizeMathLibCalls.cpp b/lib/Target/Mips/MipsOptimizeMathLibCalls.cpp
deleted file mode 100644
index de3f09c..0000000
--- a/lib/Target/Mips/MipsOptimizeMathLibCalls.cpp
+++ /dev/null
@@ -1,175 +0,0 @@
-//===---- MipsOptimizeMathLibCalls.cpp - Optimize math lib calls.      ----===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass does an IR transformation which enables the backend to emit native
-// math instructions.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MipsTargetMachine.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/Intrinsics.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Target/TargetLibraryInfo.h"
-#include "llvm/Transforms/Utils/BasicBlockUtils.h"
-
-using namespace llvm;
-
-static cl::opt<bool> DisableOpt("disable-mips-math-optimization",
-                                cl::init(false),
-                                cl::desc("MIPS: Disable math lib call "
-                                         "optimization."), cl::Hidden);
-
-namespace {
-  class MipsOptimizeMathLibCalls : public FunctionPass {
-  public:
-    static char ID;
-
-    MipsOptimizeMathLibCalls(MipsTargetMachine &TM_) :
-      FunctionPass(ID), TM(TM_) {}
-
-    virtual const char *getPassName() const {
-      return "MIPS: Optimize calls to math library functions.";
-    }
-
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const;
-
-    virtual bool runOnFunction(Function &F);
-
-  private:
-    /// Optimize calls to sqrt.
-    bool optimizeSQRT(CallInst *Call, Function *CalledFunc,
-                      BasicBlock &CurrBB,
-                      Function::iterator &BB);
-
-    const TargetMachine &TM;
-  };
-
-  char MipsOptimizeMathLibCalls::ID = 0;
-}
-
-FunctionPass *llvm::createMipsOptimizeMathLibCalls(MipsTargetMachine &TM) {
-  return new MipsOptimizeMathLibCalls(TM);
-}
-
-void MipsOptimizeMathLibCalls::getAnalysisUsage(AnalysisUsage &AU) const {
-  AU.addRequired<TargetLibraryInfo>();
-  FunctionPass::getAnalysisUsage(AU);
-}
-
-bool MipsOptimizeMathLibCalls::runOnFunction(Function &F) {
-  if (DisableOpt)
-    return false;
-
-  const MipsSubtarget &Subtarget = TM.getSubtarget<MipsSubtarget>();
-
-  if (Subtarget.inMips16Mode())
-    return false;
-
-  bool Changed = false;
-  Function::iterator CurrBB;
-  const TargetLibraryInfo *LibInfo = &getAnalysis<TargetLibraryInfo>();
-
-  for (Function::iterator BB = F.begin(), BE = F.end(); BB != BE;) {
-    CurrBB = BB++;
-
-    for (BasicBlock::iterator II = CurrBB->begin(), IE = CurrBB->end();
-         II != IE; ++II) {
-      CallInst *Call = dyn_cast<CallInst>(&*II);
-      Function *CalledFunc;
-
-      if (!Call || !(CalledFunc = Call->getCalledFunction()))
-        continue;
-
-      LibFunc::Func LibFunc;
-      Attribute A = CalledFunc->getAttributes()
-        .getAttribute(AttributeSet::FunctionIndex, "use-soft-float");
-
-      // Skip if function has "use-soft-float" attribute.
-      if ((A.isStringAttribute() && (A.getValueAsString() == "true")) ||
-          TM.Options.UseSoftFloat)
-        continue;
-
-      // Skip if function either has local linkage or is not a known library
-      // function.
-      if (CalledFunc->hasLocalLinkage() || !CalledFunc->hasName() ||
-          !LibInfo->getLibFunc(CalledFunc->getName(), LibFunc))
-        continue;
-
-      switch (LibFunc) {
-      case LibFunc::sqrtf:
-      case LibFunc::sqrt:
-        if (optimizeSQRT(Call, CalledFunc, *CurrBB, BB))
-          break;
-        continue;
-      default:
-        continue;
-      }
-
-      Changed = true;
-      break;
-    }
-  }
-
-  return Changed;
-}
-
-bool MipsOptimizeMathLibCalls::optimizeSQRT(CallInst *Call,
-                                            Function *CalledFunc,
-                                            BasicBlock &CurrBB,
-                                            Function::iterator &BB) {
-  // There is no need to change the IR, since backend will emit sqrt
-  // instruction if the call has already been marked read-only.
-  if (Call->onlyReadsMemory())
-    return false;
-
-  // Do the following transformation:
-  //
-  // (before)
-  // dst = sqrt(src)
-  //
-  // (after)
-  // v0 = sqrt_noreadmem(src) # native sqrt instruction.
-  // if (v0 is a NaN)
-  //   v1 = sqrt(src)         # library call.
-  // dst = phi(v0, v1)
-  //
-
-  // Move all instructions following Call to newly created block JoinBB.
-  // Create phi and replace all uses.
-  BasicBlock *JoinBB = llvm::SplitBlock(&CurrBB, Call->getNextNode(), this);
-  IRBuilder<> Builder(JoinBB, JoinBB->begin());
-  PHINode *Phi = Builder.CreatePHI(Call->getType(), 2);
-  Call->replaceAllUsesWith(Phi);
-
-  // Create basic block LibCallBB and insert a call to library function sqrt.
-  BasicBlock *LibCallBB = BasicBlock::Create(CurrBB.getContext(), "call.sqrt",
-                                             CurrBB.getParent(), JoinBB);
-  Builder.SetInsertPoint(LibCallBB);
-  Instruction *LibCall = Call->clone();
-  Builder.Insert(LibCall);
-  Builder.CreateBr(JoinBB);
-
-  // Add attribute "readnone" so that backend can use a native sqrt instruction
-  // for this call. Insert a FP compare instruction and a conditional branch
-  // at the end of CurrBB.
-  Call->addAttribute(AttributeSet::FunctionIndex, Attribute::ReadNone);
-  CurrBB.getTerminator()->eraseFromParent();
-  Builder.SetInsertPoint(&CurrBB);
-  Value *FCmp = Builder.CreateFCmpOEQ(Call, Call);
-  Builder.CreateCondBr(FCmp, JoinBB, LibCallBB);
-
-  // Add phi operands.
-  Phi->addIncoming(Call, &CurrBB);
-  Phi->addIncoming(LibCall, LibCallBB);
-
-  BB = JoinBB;
-  return true;
-}