X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FPatternMatch.h;h=fda925f5a9a8c2fe4b712df4618c0538a60a4423;hb=38b06447615440f935008a2141bd0a1fe078d437;hp=6b295d6482112be97114c07937633be04be5f44c;hpb=b0760c80b3994d41fcf350b7cd33a9a8f07338f9;p=oota-llvm.git

diff --git a/include/llvm/Support/PatternMatch.h b/include/llvm/Support/PatternMatch.h
index 6b295d64821..fda925f5a9a 100644
--- a/include/llvm/Support/PatternMatch.h
+++ b/include/llvm/Support/PatternMatch.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -46,9 +46,48 @@ struct leaf_ty {
   bool match(ITy *V) { return isa<Class>(V); }
 };
 
+/// m_Value() - Match an arbitrary value and ignore it.
 inline leaf_ty<Value> m_Value() { return leaf_ty<Value>(); }
+/// m_ConstantInt() - Match an arbitrary ConstantInt and ignore it.
 inline leaf_ty<ConstantInt> m_ConstantInt() { return leaf_ty<ConstantInt>(); }
 
+template<int64_t Val>
+struct constantint_ty {
+  template<typename ITy>
+  bool match(ITy *V) {
+    if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
+      const APInt &CIV = CI->getValue();
+      if (Val >= 0)
+        return CIV == Val;
+      // If Val is negative, and CI is shorter than it, truncate to the right
+      // number of bits.  If it is larger, then we have to sign extend.  Just
+      // compare their negated values.
+      return -CIV == -Val;
+    }
+    return false;
+  }
+};
+
+/// m_ConstantInt(int64_t) - Match a ConstantInt with a specific value
+/// and ignore it.
+template<int64_t Val>
+inline constantint_ty<Val> m_ConstantInt() {
+  return constantint_ty<Val>();
+}
+
+struct zero_ty {
+  template<typename ITy>
+  bool match(ITy *V) {
+    if (const Constant *C = dyn_cast<Constant>(V))
+      return C->isNullValue();
+    return false;
+  }
+};
+
+/// m_Zero() - Match an arbitrary zero/null constant.
+inline zero_ty m_Zero() { return zero_ty(); }
+
+
 template<typename Class>
 struct bind_ty {
   Class *&VR;
@@ -64,14 +103,32 @@ struct bind_ty {
   }
 };
 
+/// m_Value - Match a value, capturing it if we match.
 inline bind_ty<Value> m_Value(Value *&V) { return V; }
+
+/// m_ConstantInt - Match a ConstantInt, capturing the value if we match.
 inline bind_ty<ConstantInt> m_ConstantInt(ConstantInt *&CI) { return CI; }
 
+/// specificval_ty - Match a specified Value*.
+struct specificval_ty {
+  const Value *Val;
+  specificval_ty(const Value *V) : Val(V) {}
+
+  template<typename ITy>
+  bool match(ITy *V) {
+    return V == Val;
+  }
+};
+
+/// m_Specific - Match if we have a specific specified value.
+inline specificval_ty m_Specific(const Value *V) { return V; }
+
+
 //===----------------------------------------------------------------------===//
 // Matchers for specific binary operators.
 //
 
-template<typename LHS_t, typename RHS_t, 
+template<typename LHS_t, typename RHS_t,
          unsigned Opcode, typename ConcreteTy = BinaryOperator>
 struct BinaryOp_match {
   LHS_t L;
@@ -99,18 +156,36 @@ inline BinaryOp_match<LHS, RHS, Instruction::Add> m_Add(const LHS &L,
   return BinaryOp_match<LHS, RHS, Instruction::Add>(L, R);
 }
 
+template<typename LHS, typename RHS>
+inline BinaryOp_match<LHS, RHS, Instruction::FAdd> m_FAdd(const LHS &L,
+                                                          const RHS &R) {
+  return BinaryOp_match<LHS, RHS, Instruction::FAdd>(L, R);
+}
+
 template<typename LHS, typename RHS>
 inline BinaryOp_match<LHS, RHS, Instruction::Sub> m_Sub(const LHS &L,
                                                         const RHS &R) {
   return BinaryOp_match<LHS, RHS, Instruction::Sub>(L, R);
 }
 
+template<typename LHS, typename RHS>
+inline BinaryOp_match<LHS, RHS, Instruction::FSub> m_FSub(const LHS &L,
+                                                          const RHS &R) {
+  return BinaryOp_match<LHS, RHS, Instruction::FSub>(L, R);
+}
+
 template<typename LHS, typename RHS>
 inline BinaryOp_match<LHS, RHS, Instruction::Mul> m_Mul(const LHS &L,
                                                         const RHS &R) {
   return BinaryOp_match<LHS, RHS, Instruction::Mul>(L, R);
 }
 
+template<typename LHS, typename RHS>
+inline BinaryOp_match<LHS, RHS, Instruction::FMul> m_FMul(const LHS &L,
+                                                          const RHS &R) {
+  return BinaryOp_match<LHS, RHS, Instruction::FMul>(L, R);
+}
+
 template<typename LHS, typename RHS>
 inline BinaryOp_match<LHS, RHS, Instruction::UDiv> m_UDiv(const LHS &L,
                                                         const RHS &R) {
@@ -166,19 +241,19 @@ inline BinaryOp_match<LHS, RHS, Instruction::Xor> m_Xor(const LHS &L,
 }
 
 template<typename LHS, typename RHS>
-inline BinaryOp_match<LHS, RHS, Instruction::Shl> m_Shl(const LHS &L, 
+inline BinaryOp_match<LHS, RHS, Instruction::Shl> m_Shl(const LHS &L,
                                                         const RHS &R) {
   return BinaryOp_match<LHS, RHS, Instruction::Shl>(L, R);
 }
 
 template<typename LHS, typename RHS>
-inline BinaryOp_match<LHS, RHS, Instruction::LShr> m_LShr(const LHS &L, 
+inline BinaryOp_match<LHS, RHS, Instruction::LShr> m_LShr(const LHS &L,
                                                           const RHS &R) {
   return BinaryOp_match<LHS, RHS, Instruction::LShr>(L, R);
 }
 
 template<typename LHS, typename RHS>
-inline BinaryOp_match<LHS, RHS, Instruction::AShr> m_AShr(const LHS &L, 
+inline BinaryOp_match<LHS, RHS, Instruction::AShr> m_AShr(const LHS &L,
                                                           const RHS &R) {
   return BinaryOp_match<LHS, RHS, Instruction::AShr>(L, R);
 }
@@ -253,14 +328,14 @@ struct BinaryOpClass_match {
 template<typename LHS, typename RHS>
 inline BinaryOpClass_match<LHS, RHS, BinaryOperator, Instruction::BinaryOps>
 m_Shift(Instruction::BinaryOps &Op, const LHS &L, const RHS &R) {
-  return BinaryOpClass_match<LHS, RHS, 
+  return BinaryOpClass_match<LHS, RHS,
                              BinaryOperator, Instruction::BinaryOps>(Op, L, R);
 }
 
 template<typename LHS, typename RHS>
 inline BinaryOpClass_match<LHS, RHS, BinaryOperator, Instruction::BinaryOps>
 m_Shift(const LHS &L, const RHS &R) {
-  return BinaryOpClass_match<LHS, RHS, 
+  return BinaryOpClass_match<LHS, RHS,
                              BinaryOperator, Instruction::BinaryOps>(L, R);
 }
 
@@ -303,6 +378,71 @@ m_FCmp(FCmpInst::Predicate &Pred, const LHS &L, const RHS &R) {
                         FCmpInst, FCmpInst::Predicate>(Pred, L, R);
 }
 
+//===----------------------------------------------------------------------===//
+// Matchers for SelectInst classes
+//
+
+template<typename Cond_t, typename LHS_t, typename RHS_t>
+struct SelectClass_match {
+  Cond_t C;
+  LHS_t L;
+  RHS_t R;
+
+  SelectClass_match(const Cond_t &Cond, const LHS_t &LHS,
+                    const RHS_t &RHS)
+    : C(Cond), L(LHS), R(RHS) {}
+
+  template<typename OpTy>
+  bool match(OpTy *V) {
+    if (SelectInst *I = dyn_cast<SelectInst>(V))
+      return C.match(I->getOperand(0)) &&
+             L.match(I->getOperand(1)) &&
+             R.match(I->getOperand(2));
+    return false;
+  }
+};
+
+template<typename Cond, typename LHS, typename RHS>
+inline SelectClass_match<Cond, RHS, LHS>
+m_Select(const Cond &C, const LHS &L, const RHS &R) {
+  return SelectClass_match<Cond, LHS, RHS>(C, L, R);
+}
+
+/// m_SelectCst - This matches a select of two constants, e.g.:
+///    m_SelectCst(m_Value(V), -1, 0)
+template<int64_t L, int64_t R, typename Cond>
+inline SelectClass_match<Cond, constantint_ty<L>, constantint_ty<R> >
+m_SelectCst(const Cond &C) {
+  return SelectClass_match<Cond, constantint_ty<L>,
+                           constantint_ty<R> >(C, m_ConstantInt<L>(),
+                                           m_ConstantInt<R>());
+}
+
+
+//===----------------------------------------------------------------------===//
+// Matchers for CastInst classes
+//
+
+template<typename Op_t, typename Class>
+struct CastClass_match {
+  Op_t Op;
+
+  CastClass_match(const Op_t &OpMatch) : Op(OpMatch) {}
+
+  template<typename OpTy>
+  bool match(OpTy *V) {
+    if (Class *I = dyn_cast<Class>(V))
+      return Op.match(I->getOperand(0));
+    return false;
+  }
+};
+
+template<typename Class, typename OpTy>
+inline CastClass_match<OpTy, Class> m_Cast(const OpTy &Op) {
+  return CastClass_match<OpTy, Class>(Op);
+}
+
+
 //===----------------------------------------------------------------------===//
 // Matchers for unary operators
 //
@@ -343,6 +483,64 @@ template<typename LHS>
 inline not_match<LHS> m_Not(const LHS &L) { return L; }
 
 
+template<typename LHS_t>
+struct neg_match {
+  LHS_t L;
+
+  neg_match(const LHS_t &LHS) : L(LHS) {}
+
+  template<typename OpTy>
+  bool match(OpTy *V) {
+    if (Instruction *I = dyn_cast<Instruction>(V))
+      if (I->getOpcode() == Instruction::Sub)
+        return matchIfNeg(I->getOperand(0), I->getOperand(1));
+    if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
+      if (CE->getOpcode() == Instruction::Sub)
+        return matchIfNeg(CE->getOperand(0), CE->getOperand(1));
+    if (ConstantInt *CI = dyn_cast<ConstantInt>(V))
+      return L.match(ConstantExpr::getNeg(CI));
+    return false;
+  }
+private:
+  bool matchIfNeg(Value *LHS, Value *RHS) {
+    return LHS == ConstantExpr::getZeroValueForNegationExpr(LHS->getType()) &&
+           L.match(RHS);
+  }
+};
+
+template<typename LHS>
+inline neg_match<LHS> m_Neg(const LHS &L) { return L; }
+
+
+template<typename LHS_t>
+struct fneg_match {
+  LHS_t L;
+
+  fneg_match(const LHS_t &LHS) : L(LHS) {}
+
+  template<typename OpTy>
+  bool match(OpTy *V) {
+    if (Instruction *I = dyn_cast<Instruction>(V))
+      if (I->getOpcode() == Instruction::FSub)
+        return matchIfFNeg(I->getOperand(0), I->getOperand(1));
+    if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
+      if (CE->getOpcode() == Instruction::FSub)
+        return matchIfFNeg(CE->getOperand(0), CE->getOperand(1));
+    if (ConstantFP *CF = dyn_cast<ConstantFP>(V))
+      return L.match(ConstantExpr::getFNeg(CF));
+    return false;
+  }
+private:
+  bool matchIfFNeg(Value *LHS, Value *RHS) {
+    return LHS == ConstantExpr::getZeroValueForNegationExpr(LHS->getType()) &&
+           L.match(RHS);
+  }
+};
+
+template<typename LHS>
+inline fneg_match<LHS> m_FNeg(const LHS &L) { return L; }
+
+
 //===----------------------------------------------------------------------===//
 // Matchers for control flow
 //
@@ -370,13 +568,11 @@ struct brc_match {
 };
 
 template<typename Cond_t>
-inline brc_match<Cond_t> m_Br(const Cond_t &C, BasicBlock *&T, BasicBlock *&F){
+inline brc_match<Cond_t> m_Br(const Cond_t &C, BasicBlock *&T, BasicBlock *&F) {
   return brc_match<Cond_t>(C, T, F);
 }
 
-
-}} // end llvm::match
-
+} // end namespace PatternMatch
+} // end namespace llvm
 
 #endif
-