mirror of
https://github.com/c64scene-ar/llvm-6502.git
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832254e1c2
This feature is needed in order to support shifts of more than 255 bits on large integer types. This changes the syntax for llvm assembly to make shl, ashr and lshr instructions look like a binary operator: shl i32 %X, 1 instead of shl i32 %X, i8 1 Additionally, this should help a few passes perform additional optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33776 91177308-0d34-0410-b5e6-96231b3b80d8
377 lines
12 KiB
C++
377 lines
12 KiB
C++
//===-- llvm/Support/PatternMatch.h - Match on the LLVM IR ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides a simple and efficient mechanism for performing general
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// tree-based pattern matches on the LLVM IR. The power of these routines is
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// that it allows you to write concise patterns that are expressive and easy to
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// understand. The other major advantage of this is that it allows you to
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// trivially capture/bind elements in the pattern to variables. For example,
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// you can do something like this:
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//
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// Value *Exp = ...
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// Value *X, *Y; ConstantInt *C1, *C2; // (X & C1) | (Y & C2)
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// if (match(Exp, m_Or(m_And(m_Value(X), m_ConstantInt(C1)),
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// m_And(m_Value(Y), m_ConstantInt(C2))))) {
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// ... Pattern is matched and variables are bound ...
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// }
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//
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// This is primarily useful to things like the instruction combiner, but can
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// also be useful for static analysis tools or code generators.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_PATTERNMATCH_H
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#define LLVM_SUPPORT_PATTERNMATCH_H
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#include "llvm/Constants.h"
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#include "llvm/Instructions.h"
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namespace llvm {
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namespace PatternMatch {
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template<typename Val, typename Pattern>
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bool match(Val *V, const Pattern &P) {
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return const_cast<Pattern&>(P).match(V);
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}
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template<typename Class>
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struct leaf_ty {
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template<typename ITy>
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bool match(ITy *V) { return isa<Class>(V); }
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};
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inline leaf_ty<Value> m_Value() { return leaf_ty<Value>(); }
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inline leaf_ty<ConstantInt> m_ConstantInt() { return leaf_ty<ConstantInt>(); }
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template<typename Class>
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struct bind_ty {
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Class *&VR;
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bind_ty(Class *&V) : VR(V) {}
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template<typename ITy>
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bool match(ITy *V) {
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if (Class *CV = dyn_cast<Class>(V)) {
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VR = CV;
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return true;
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}
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return false;
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}
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};
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inline bind_ty<Value> m_Value(Value *&V) { return V; }
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inline bind_ty<ConstantInt> m_ConstantInt(ConstantInt *&CI) { return CI; }
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//===----------------------------------------------------------------------===//
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// Matchers for specific binary operators.
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//
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template<typename LHS_t, typename RHS_t,
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unsigned Opcode, typename ConcreteTy = BinaryOperator>
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struct BinaryOp_match {
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LHS_t L;
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RHS_t R;
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BinaryOp_match(const LHS_t &LHS, const RHS_t &RHS) : L(LHS), R(RHS) {}
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template<typename OpTy>
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bool match(OpTy *V) {
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if (V->getValueType() == Value::InstructionVal + Opcode) {
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ConcreteTy *I = cast<ConcreteTy>(V);
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return I->getOpcode() == Opcode && L.match(I->getOperand(0)) &&
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R.match(I->getOperand(1));
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}
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
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return CE->getOpcode() == Opcode && L.match(CE->getOperand(0)) &&
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R.match(CE->getOperand(1));
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return false;
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}
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};
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::Add> m_Add(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::Add>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::Sub> m_Sub(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::Sub>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::Mul> m_Mul(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::Mul>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::UDiv> m_UDiv(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::UDiv>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::SDiv> m_SDiv(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::SDiv>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::FDiv> m_FDiv(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::FDiv>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::URem> m_URem(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::URem>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::SRem> m_SRem(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::SRem>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::FRem> m_FRem(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::FRem>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::And> m_And(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::And>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::Or> m_Or(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::Or>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::Xor> m_Xor(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::Xor>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::Shl> m_Shl(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::Shl>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::LShr> m_LShr(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::LShr>(L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOp_match<LHS, RHS, Instruction::AShr> m_AShr(const LHS &L,
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const RHS &R) {
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return BinaryOp_match<LHS, RHS, Instruction::AShr>(L, R);
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}
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//===----------------------------------------------------------------------===//
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// Matchers for either AShr or LShr .. for convenience
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//
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template<typename LHS_t, typename RHS_t, typename ConcreteTy = BinaryOperator>
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struct Shr_match {
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LHS_t L;
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RHS_t R;
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Shr_match(const LHS_t &LHS, const RHS_t &RHS) : L(LHS), R(RHS) {}
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template<typename OpTy>
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bool match(OpTy *V) {
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if (V->getValueType() == Value::InstructionVal + Instruction::LShr ||
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V->getValueType() == Value::InstructionVal + Instruction::AShr) {
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ConcreteTy *I = cast<ConcreteTy>(V);
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return (I->getOpcode() == Instruction::AShr ||
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I->getOpcode() == Instruction::LShr) &&
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L.match(I->getOperand(0)) &&
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R.match(I->getOperand(1));
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}
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
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return (CE->getOpcode() == Instruction::LShr ||
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CE->getOpcode() == Instruction::AShr) &&
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L.match(CE->getOperand(0)) &&
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R.match(CE->getOperand(1));
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return false;
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}
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};
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template<typename LHS, typename RHS>
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inline Shr_match<LHS, RHS> m_Shr(const LHS &L, const RHS &R) {
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return Shr_match<LHS, RHS>(L, R);
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}
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//===----------------------------------------------------------------------===//
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// Matchers for binary classes
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//
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template<typename LHS_t, typename RHS_t, typename Class, typename OpcType>
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struct BinaryOpClass_match {
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OpcType &Opcode;
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LHS_t L;
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RHS_t R;
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BinaryOpClass_match(OpcType &Op, const LHS_t &LHS,
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const RHS_t &RHS)
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: Opcode(Op), L(LHS), R(RHS) {}
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template<typename OpTy>
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bool match(OpTy *V) {
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if (Class *I = dyn_cast<Class>(V))
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if (L.match(I->getOperand(0)) && R.match(I->getOperand(1))) {
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Opcode = I->getOpcode();
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return true;
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}
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#if 0 // Doesn't handle constantexprs yet!
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
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return CE->getOpcode() == Opcode && L.match(CE->getOperand(0)) &&
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R.match(CE->getOperand(1));
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#endif
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return false;
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}
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};
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template<typename LHS, typename RHS>
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inline BinaryOpClass_match<LHS, RHS, BinaryOperator, Instruction::BinaryOps>
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m_Shift(Instruction::BinaryOps &Op, const LHS &L, const RHS &R) {
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return BinaryOpClass_match<LHS, RHS,
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BinaryOperator, Instruction::BinaryOps>(Op, L, R);
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}
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template<typename LHS, typename RHS>
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inline BinaryOpClass_match<LHS, RHS, BinaryOperator, Instruction::BinaryOps>
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m_Shift(const LHS &L, const RHS &R) {
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Instruction::BinaryOps Op;
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return BinaryOpClass_match<LHS, RHS,
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BinaryOperator, Instruction::BinaryOps>(Op, L, R);
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}
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//===----------------------------------------------------------------------===//
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// Matchers for CmpInst classes
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//
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template<typename LHS_t, typename RHS_t, typename Class, typename PredicateTy>
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struct CmpClass_match {
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PredicateTy &Predicate;
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LHS_t L;
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RHS_t R;
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CmpClass_match(PredicateTy &Pred, const LHS_t &LHS,
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const RHS_t &RHS)
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: Predicate(Pred), L(LHS), R(RHS) {}
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template<typename OpTy>
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bool match(OpTy *V) {
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if (Class *I = dyn_cast<Class>(V))
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if (L.match(I->getOperand(0)) && R.match(I->getOperand(1))) {
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Predicate = I->getPredicate();
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return true;
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}
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return false;
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}
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};
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template<typename LHS, typename RHS>
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inline CmpClass_match<LHS, RHS, ICmpInst, ICmpInst::Predicate>
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m_ICmp(ICmpInst::Predicate &Pred, const LHS &L, const RHS &R) {
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return CmpClass_match<LHS, RHS,
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ICmpInst, ICmpInst::Predicate>(Pred, L, R);
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}
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template<typename LHS, typename RHS>
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inline CmpClass_match<LHS, RHS, FCmpInst, FCmpInst::Predicate>
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m_FCmp(FCmpInst::Predicate &Pred, const LHS &L, const RHS &R) {
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return CmpClass_match<LHS, RHS,
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FCmpInst, FCmpInst::Predicate>(Pred, L, R);
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}
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//===----------------------------------------------------------------------===//
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// Matchers for unary operators
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//
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template<typename LHS_t>
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struct not_match {
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LHS_t L;
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not_match(const LHS_t &LHS) : L(LHS) {}
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template<typename OpTy>
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bool match(OpTy *V) {
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if (Instruction *I = dyn_cast<Instruction>(V))
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if (I->getOpcode() == Instruction::Xor)
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return matchIfNot(I->getOperand(0), I->getOperand(1));
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
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if (CE->getOpcode() == Instruction::Xor)
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return matchIfNot(CE->getOperand(0), CE->getOperand(1));
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if (ConstantInt *CI = dyn_cast<ConstantInt>(V))
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return L.match(ConstantExpr::getNot(CI));
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return false;
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}
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private:
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bool matchIfNot(Value *LHS, Value *RHS) {
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if (ConstantInt *CI = dyn_cast<ConstantInt>(RHS))
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return CI->isAllOnesValue() && L.match(LHS);
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else if (ConstantInt *CI = dyn_cast<ConstantInt>(LHS))
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return CI->isAllOnesValue() && L.match(RHS);
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return false;
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}
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};
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template<typename LHS>
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inline not_match<LHS> m_Not(const LHS &L) { return L; }
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//===----------------------------------------------------------------------===//
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// Matchers for control flow
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//
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template<typename Cond_t>
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struct brc_match {
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Cond_t Cond;
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BasicBlock *&T, *&F;
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brc_match(const Cond_t &C, BasicBlock *&t, BasicBlock *&f)
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: Cond(C), T(t), F(f) {
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}
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template<typename OpTy>
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bool match(OpTy *V) {
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if (BranchInst *BI = dyn_cast<BranchInst>(V))
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if (BI->isConditional()) {
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if (Cond.match(BI->getCondition())) {
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T = BI->getSuccessor(0);
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F = BI->getSuccessor(1);
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return true;
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}
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}
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return false;
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}
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};
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template<typename Cond_t>
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inline brc_match<Cond_t> m_Br(const Cond_t &C, BasicBlock *&T, BasicBlock *&F){
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return brc_match<Cond_t>(C, T, F);
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}
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}} // end llvm::match
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#endif
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