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The "noduplicate" function attribute exists to prevent certain optimizations from duplicating calls to the function. This is important on platforms where certain function call duplications are unsafe (for example execution barriers for CUDA and OpenCL). This patch makes it possible to specify intrinsics as "noduplicate" and translates that to the appropriate function attribute. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204200 91177308-0d34-0410-b5e6-96231b3b80d8
99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
//===- CodeGenIntrinsic.h - Intrinsic Class Wrapper ------------*- 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 a wrapper class for the 'Intrinsic' TableGen class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CODEGEN_INTRINSIC_H
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#define CODEGEN_INTRINSIC_H
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#include "llvm/CodeGen/MachineValueType.h"
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#include <string>
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#include <vector>
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namespace llvm {
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class Record;
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class RecordKeeper;
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class CodeGenTarget;
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struct CodeGenIntrinsic {
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Record *TheDef; // The actual record defining this intrinsic.
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std::string Name; // The name of the LLVM function "llvm.bswap.i32"
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std::string EnumName; // The name of the enum "bswap_i32"
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std::string GCCBuiltinName;// Name of the corresponding GCC builtin, or "".
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std::string TargetPrefix; // Target prefix, e.g. "ppc" for t-s intrinsics.
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/// IntrinsicSignature - This structure holds the return values and
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/// parameter values of an intrinsic. If the number of return values is > 1,
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/// then the intrinsic implicitly returns a first-class aggregate. The
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/// numbering of the types starts at 0 with the first return value and
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/// continues from there through the parameter list. This is useful for
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/// "matching" types.
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struct IntrinsicSignature {
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/// RetVTs - The MVT::SimpleValueType for each return type. Note that this
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/// list is only populated when in the context of a target .td file. When
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/// building Intrinsics.td, this isn't available, because we don't know
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/// the target pointer size.
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std::vector<MVT::SimpleValueType> RetVTs;
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/// RetTypeDefs - The records for each return type.
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std::vector<Record*> RetTypeDefs;
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/// ParamVTs - The MVT::SimpleValueType for each parameter type. Note that
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/// this list is only populated when in the context of a target .td file.
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/// When building Intrinsics.td, this isn't available, because we don't
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/// know the target pointer size.
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std::vector<MVT::SimpleValueType> ParamVTs;
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/// ParamTypeDefs - The records for each parameter type.
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std::vector<Record*> ParamTypeDefs;
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};
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IntrinsicSignature IS;
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// Memory mod/ref behavior of this intrinsic.
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enum {
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NoMem, ReadArgMem, ReadMem, ReadWriteArgMem, ReadWriteMem
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} ModRef;
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/// This is set to true if the intrinsic is overloaded by its argument
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/// types.
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bool isOverloaded;
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/// isCommutative - True if the intrinsic is commutative.
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bool isCommutative;
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/// canThrow - True if the intrinsic can throw.
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bool canThrow;
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/// isNoDuplicate - True if the intrinsic is marked as noduplicate.
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bool isNoDuplicate;
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/// isNoReturn - True if the intrinsic is no-return.
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bool isNoReturn;
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enum ArgAttribute {
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NoCapture,
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ReadOnly,
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ReadNone
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};
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std::vector<std::pair<unsigned, ArgAttribute> > ArgumentAttributes;
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CodeGenIntrinsic(Record *R);
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};
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/// LoadIntrinsics - Read all of the intrinsics defined in the specified
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/// .td file.
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std::vector<CodeGenIntrinsic> LoadIntrinsics(const RecordKeeper &RC,
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bool TargetOnly);
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}
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#endif
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