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https://github.com/c64scene-ar/llvm-6502.git
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3bfbc4587a
how to fold notionally-out-of-bounds array getelementptr indices instead of just doing these in lib/Analysis/ConstantFolding.cpp, because it can be done in a fairly general way without TargetData, and because not all constants are visited by lib/Analysis/ConstantFolding.cpp. This enables more constant folding. Also, set the "inbounds" flag when the getelementptr indices are one-past-the-end. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81483 91177308-0d34-0410-b5e6-96231b3b80d8
72 lines
3.4 KiB
C++
72 lines
3.4 KiB
C++
//===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the (internal) constant folding interfaces for LLVM. These
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// interfaces are used by the ConstantExpr::get* methods to automatically fold
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// constants when possible.
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//
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// These operators may return a null object if they don't know how to perform
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// the specified operation on the specified constant types.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CONSTANTFOLDING_H
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#define CONSTANTFOLDING_H
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namespace llvm {
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class Value;
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class Constant;
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class Type;
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class LLVMContext;
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// Constant fold various types of instruction...
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Constant *ConstantFoldCastInstruction(
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LLVMContext &Context,
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unsigned opcode, ///< The opcode of the cast
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const Constant *V, ///< The source constant
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const Type *DestTy ///< The destination type
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);
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Constant *ConstantFoldSelectInstruction(LLVMContext &Context,
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const Constant *Cond,
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const Constant *V1,
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const Constant *V2);
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Constant *ConstantFoldExtractElementInstruction(LLVMContext &Context,
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const Constant *Val,
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const Constant *Idx);
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Constant *ConstantFoldInsertElementInstruction(LLVMContext &Context,
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const Constant *Val,
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const Constant *Elt,
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const Constant *Idx);
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Constant *ConstantFoldShuffleVectorInstruction(LLVMContext &Context,
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const Constant *V1,
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const Constant *V2,
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const Constant *Mask);
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Constant *ConstantFoldExtractValueInstruction(LLVMContext &Context,
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const Constant *Agg,
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const unsigned *Idxs,
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unsigned NumIdx);
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Constant *ConstantFoldInsertValueInstruction(LLVMContext &Context,
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const Constant *Agg,
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const Constant *Val,
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const unsigned* Idxs,
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unsigned NumIdx);
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Constant *ConstantFoldBinaryInstruction(LLVMContext &Context,
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unsigned Opcode, const Constant *V1,
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const Constant *V2);
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Constant *ConstantFoldCompareInstruction(LLVMContext &Context,
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unsigned short predicate,
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const Constant *C1,
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const Constant *C2);
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Constant *ConstantFoldGetElementPtr(LLVMContext &Context, const Constant *C,
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bool inBounds,
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Constant* const *Idxs, unsigned NumIdx);
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} // End llvm namespace
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#endif
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