vendor/llvm/llvm-trunk-r321017

1 files changed, 0 insertions, 108 deletions

diff --git a/lib/Transforms/Utils/CmpInstAnalysis.cpp b/lib/Transforms/Utils/CmpInstAnalysis.cpp
deleted file mode 100644
index d9294c499309..000000000000
--- a/lib/Transforms/Utils/CmpInstAnalysis.cpp
+++ /dev/null
@@ -1,108 +0,0 @@
-//===- CmpInstAnalysis.cpp - Utils to help fold compares ---------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file holds routines to help analyse compare instructions
-// and fold them into constants or other compare instructions
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/Utils/CmpInstAnalysis.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/Instructions.h"
-
-using namespace llvm;
-
-unsigned llvm::getICmpCode(const ICmpInst *ICI, bool InvertPred) {
-  ICmpInst::Predicate Pred = InvertPred ? ICI->getInversePredicate()
-                                        : ICI->getPredicate();
-  switch (Pred) {
-      // False -> 0
-    case ICmpInst::ICMP_UGT: return 1;  // 001
-    case ICmpInst::ICMP_SGT: return 1;  // 001
-    case ICmpInst::ICMP_EQ:  return 2;  // 010
-    case ICmpInst::ICMP_UGE: return 3;  // 011
-    case ICmpInst::ICMP_SGE: return 3;  // 011
-    case ICmpInst::ICMP_ULT: return 4;  // 100
-    case ICmpInst::ICMP_SLT: return 4;  // 100
-    case ICmpInst::ICMP_NE:  return 5;  // 101
-    case ICmpInst::ICMP_ULE: return 6;  // 110
-    case ICmpInst::ICMP_SLE: return 6;  // 110
-      // True -> 7
-    default:
-      llvm_unreachable("Invalid ICmp predicate!");
-  }
-}
-
-Value *llvm::getICmpValue(bool Sign, unsigned Code, Value *LHS, Value *RHS,
-                          CmpInst::Predicate &NewICmpPred) {
-  switch (Code) {
-    default: llvm_unreachable("Illegal ICmp code!");
-    case 0: // False.
-      return ConstantInt::get(CmpInst::makeCmpResultType(LHS->getType()), 0);
-    case 1: NewICmpPred = Sign ? ICmpInst::ICMP_SGT : ICmpInst::ICMP_UGT; break;
-    case 2: NewICmpPred = ICmpInst::ICMP_EQ; break;
-    case 3: NewICmpPred = Sign ? ICmpInst::ICMP_SGE : ICmpInst::ICMP_UGE; break;
-    case 4: NewICmpPred = Sign ? ICmpInst::ICMP_SLT : ICmpInst::ICMP_ULT; break;
-    case 5: NewICmpPred = ICmpInst::ICMP_NE; break;
-    case 6: NewICmpPred = Sign ? ICmpInst::ICMP_SLE : ICmpInst::ICMP_ULE; break;
-    case 7: // True.
-      return ConstantInt::get(CmpInst::makeCmpResultType(LHS->getType()), 1);
-  }
-  return nullptr;
-}
-
-bool llvm::PredicatesFoldable(ICmpInst::Predicate p1, ICmpInst::Predicate p2) {
-  return (CmpInst::isSigned(p1) == CmpInst::isSigned(p2)) ||
-         (CmpInst::isSigned(p1) && ICmpInst::isEquality(p2)) ||
-         (CmpInst::isSigned(p2) && ICmpInst::isEquality(p1));
-}
-
-bool llvm::decomposeBitTestICmp(const ICmpInst *I, CmpInst::Predicate &Pred,
-                                Value *&X, Value *&Y, Value *&Z) {
-  ConstantInt *C = dyn_cast<ConstantInt>(I->getOperand(1));
-  if (!C)
-    return false;
-
-  switch (I->getPredicate()) {
-  default:
-    return false;
-  case ICmpInst::ICMP_SLT:
-    // X < 0 is equivalent to (X & SignMask) != 0.
-    if (!C->isZero())
-      return false;
-    Y = ConstantInt::get(I->getContext(), APInt::getSignMask(C->getBitWidth()));
-    Pred = ICmpInst::ICMP_NE;
-    break;
-  case ICmpInst::ICMP_SGT:
-    // X > -1 is equivalent to (X & SignMask) == 0.
-    if (!C->isMinusOne())
-      return false;
-    Y = ConstantInt::get(I->getContext(), APInt::getSignMask(C->getBitWidth()));
-    Pred = ICmpInst::ICMP_EQ;
-    break;
-  case ICmpInst::ICMP_ULT:
-    // X <u 2^n is equivalent to (X & ~(2^n-1)) == 0.
-    if (!C->getValue().isPowerOf2())
-      return false;
-    Y = ConstantInt::get(I->getContext(), -C->getValue());
-    Pred = ICmpInst::ICMP_EQ;
-    break;
-  case ICmpInst::ICMP_UGT:
-    // X >u 2^n-1 is equivalent to (X & ~(2^n-1)) != 0.
-    if (!(C->getValue() + 1).isPowerOf2())
-      return false;
-    Y = ConstantInt::get(I->getContext(), ~C->getValue());
-    Pred = ICmpInst::ICMP_NE;
-    break;
-  }
-
-  X = I->getOperand(0);
-  Z = ConstantInt::getNullValue(C->getType());
-  return true;
-}