mirror of
https://github.com/RPCSX/llvm.git
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6994040a95
This also changes the syntax for llvm.bswap, llvm.part.set, llvm.part.select, and llvm.ct* intrinsics. They are automatically upgraded by both the LLVM ASM reader and the bitcode reader. The test cases have been updated, with special tests added to ensure the automatic upgrading is supported. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40807 91177308-0d34-0410-b5e6-96231b3b80d8
405 lines
14 KiB
C++
405 lines
14 KiB
C++
//===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
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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 Chris Lattner 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 tablegen backend emits information about intrinsic functions.
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//
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//===----------------------------------------------------------------------===//
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#include "CodeGenTarget.h"
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#include "IntrinsicEmitter.h"
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#include "Record.h"
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#include "llvm/ADT/StringExtras.h"
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#include <algorithm>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// IntrinsicEmitter Implementation
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//===----------------------------------------------------------------------===//
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void IntrinsicEmitter::run(std::ostream &OS) {
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EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
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std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
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// Emit the enum information.
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EmitEnumInfo(Ints, OS);
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// Emit the intrinsic ID -> name table.
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EmitIntrinsicToNameTable(Ints, OS);
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// Emit the function name recognizer.
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EmitFnNameRecognizer(Ints, OS);
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// Emit the intrinsic verifier.
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EmitVerifier(Ints, OS);
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// Emit the intrinsic declaration generator.
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EmitGenerator(Ints, OS);
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// Emit mod/ref info for each function.
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EmitModRefInfo(Ints, OS);
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// Emit table of non-memory accessing intrinsics.
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EmitNoMemoryInfo(Ints, OS);
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// Emit side effect info for each intrinsic.
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EmitSideEffectInfo(Ints, OS);
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// Emit a list of intrinsics with corresponding GCC builtins.
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EmitGCCBuiltinList(Ints, OS);
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// Emit code to translate GCC builtins into LLVM intrinsics.
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EmitIntrinsicToGCCBuiltinMap(Ints, OS);
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}
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void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// Enum values for Intrinsics.h\n";
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OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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OS << " " << Ints[i].EnumName;
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OS << ((i != e-1) ? ", " : " ");
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OS << std::string(40-Ints[i].EnumName.size(), ' ')
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<< "// " << Ints[i].Name << "\n";
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}
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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// Build a function name -> intrinsic name mapping.
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std::map<std::string, unsigned> IntMapping;
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for (unsigned i = 0, e = Ints.size(); i != e; ++i)
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IntMapping[Ints[i].Name] = i;
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OS << "// Function name -> enum value recognizer code.\n";
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OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
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OS << " switch (Name[5]) {\n";
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OS << " default:\n";
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// Emit the intrinsics in sorted order.
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char LastChar = 0;
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for (std::map<std::string, unsigned>::iterator I = IntMapping.begin(),
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E = IntMapping.end(); I != E; ++I) {
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if (I->first[5] != LastChar) {
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LastChar = I->first[5];
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OS << " break;\n";
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OS << " case '" << LastChar << "':\n";
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}
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// For overloaded intrinsics, only the prefix needs to match
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if (Ints[I->second].isOverloaded)
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OS << " if (Len > " << I->first.size()
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<< " && !memcmp(Name, \"" << I->first << ".\", "
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<< (I->first.size() + 1) << ")) return Intrinsic::"
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<< Ints[I->second].EnumName << ";\n";
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else
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OS << " if (Len == " << I->first.size()
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<< " && !memcmp(Name, \"" << I->first << "\", "
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<< I->first.size() << ")) return Intrinsic::"
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<< Ints[I->second].EnumName << ";\n";
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}
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// Intrinsic ID to name table\n";
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OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
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OS << " // Note that entry #0 is the invalid intrinsic!\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i)
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OS << " \"" << Ints[i].Name << "\",\n";
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OS << "#endif\n\n";
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}
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static void EmitTypeForValueType(std::ostream &OS, MVT::ValueType VT) {
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if (MVT::isInteger(VT)) {
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unsigned BitWidth = MVT::getSizeInBits(VT);
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OS << "IntegerType::get(" << BitWidth << ")";
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} else if (VT == MVT::Other) {
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// MVT::OtherVT is used to mean the empty struct type here.
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OS << "StructType::get(std::vector<const Type *>())";
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} else if (VT == MVT::f32) {
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OS << "Type::FloatTy";
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} else if (VT == MVT::f64) {
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OS << "Type::DoubleTy";
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} else if (VT == MVT::isVoid) {
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OS << "Type::VoidTy";
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} else {
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assert(false && "Unsupported ValueType!");
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}
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}
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static void EmitTypeGenerate(std::ostream &OS, Record *ArgType,
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unsigned &ArgNo) {
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MVT::ValueType VT = getValueType(ArgType->getValueAsDef("VT"));
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if (ArgType->isSubClassOf("LLVMMatchType")) {
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unsigned Number = ArgType->getValueAsInt("Number");
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assert(Number < ArgNo && "Invalid matching number!");
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OS << "Tys[" << Number << "]";
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} else if (VT == MVT::iAny) {
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// NOTE: The ArgNo variable here is not the absolute argument number, it is
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// the index of the "arbitrary" type in the Tys array passed to the
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// Intrinsic::getDeclaration function. Consequently, we only want to
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// increment it when we actually hit an overloaded type. Getting this wrong
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// leads to very subtle bugs!
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OS << "Tys[" << ArgNo++ << "]";
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} else if (MVT::isVector(VT)) {
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OS << "VectorType::get(";
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EmitTypeForValueType(OS, MVT::getVectorElementType(VT));
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OS << ", " << MVT::getVectorNumElements(VT) << ")";
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} else if (VT == MVT::iPTR) {
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OS << "PointerType::get(";
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EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
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OS << ")";
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} else if (VT == MVT::isVoid) {
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if (ArgNo == 0)
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OS << "Type::VoidTy";
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else
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// MVT::isVoid is used to mean varargs here.
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OS << "...";
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} else {
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EmitTypeForValueType(OS, VT);
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}
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}
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/// RecordListComparator - Provide a determinstic comparator for lists of
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/// records.
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namespace {
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struct RecordListComparator {
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bool operator()(const std::vector<Record*> &LHS,
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const std::vector<Record*> &RHS) const {
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unsigned i = 0;
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do {
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if (i == RHS.size()) return false; // RHS is shorter than LHS.
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if (LHS[i] != RHS[i])
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return LHS[i]->getName() < RHS[i]->getName();
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} while (++i != LHS.size());
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return i != RHS.size();
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}
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};
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}
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void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
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OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
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OS << " switch (ID) {\n";
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OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
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// This checking can emit a lot of very common code. To reduce the amount of
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// code that we emit, batch up cases that have identical types. This avoids
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// problems where GCC can run out of memory compiling Verifier.cpp.
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typedef std::map<std::vector<Record*>, std::vector<unsigned>,
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RecordListComparator> MapTy;
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MapTy UniqueArgInfos;
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// Compute the unique argument type info.
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for (unsigned i = 0, e = Ints.size(); i != e; ++i)
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UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
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// Loop through the array, emitting one comparison for each batch.
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for (MapTy::iterator I = UniqueArgInfos.begin(),
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E = UniqueArgInfos.end(); I != E; ++I) {
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for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
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OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
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<< Ints[I->second[i]].Name << "\n";
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}
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const std::vector<Record*> &ArgTypes = I->first;
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OS << " VerifyIntrinsicPrototype(ID, IF, " << ArgTypes.size() << ", ";
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for (unsigned j = 0; j != ArgTypes.size(); ++j) {
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Record *ArgType = ArgTypes[j];
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if (ArgType->isSubClassOf("LLVMMatchType")) {
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unsigned Number = ArgType->getValueAsInt("Number");
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assert(Number < j && "Invalid matching number!");
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OS << "~" << Number;
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} else {
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MVT::ValueType VT = getValueType(ArgType->getValueAsDef("VT"));
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OS << getEnumName(VT);
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if (VT == MVT::isVoid && j != 0 && j != ArgTypes.size()-1)
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throw "Var arg type not last argument";
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}
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if (j != ArgTypes.size()-1)
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OS << ", ";
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}
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OS << ");\n";
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OS << " break;\n";
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}
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// Code for generating Intrinsic function declarations.\n";
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OS << "#ifdef GET_INTRINSIC_GENERATOR\n";
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OS << " switch (id) {\n";
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OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
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// Similar to GET_INTRINSIC_VERIFIER, batch up cases that have identical
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// types.
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typedef std::map<std::vector<Record*>, std::vector<unsigned>,
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RecordListComparator> MapTy;
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MapTy UniqueArgInfos;
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// Compute the unique argument type info.
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for (unsigned i = 0, e = Ints.size(); i != e; ++i)
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UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
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// Loop through the array, emitting one generator for each batch.
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for (MapTy::iterator I = UniqueArgInfos.begin(),
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E = UniqueArgInfos.end(); I != E; ++I) {
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for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
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OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
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<< Ints[I->second[i]].Name << "\n";
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}
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const std::vector<Record*> &ArgTypes = I->first;
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unsigned N = ArgTypes.size();
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if (N > 1 &&
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getValueType(ArgTypes[N-1]->getValueAsDef("VT")) == MVT::isVoid) {
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OS << " IsVarArg = true;\n";
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--N;
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}
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unsigned ArgNo = 0;
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OS << " ResultTy = ";
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EmitTypeGenerate(OS, ArgTypes[0], ArgNo);
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OS << ";\n";
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for (unsigned j = 1; j != N; ++j) {
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OS << " ArgTys.push_back(";
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EmitTypeGenerate(OS, ArgTypes[j], ArgNo);
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OS << ");\n";
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}
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OS << " break;\n";
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}
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// BasicAliasAnalysis code.\n";
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OS << "#ifdef GET_MODREF_BEHAVIOR\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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switch (Ints[i].ModRef) {
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default: break;
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case CodeGenIntrinsic::NoMem:
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OS << " NoMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
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break;
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case CodeGenIntrinsic::ReadArgMem:
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case CodeGenIntrinsic::ReadMem:
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OS << " OnlyReadsMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
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break;
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}
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}
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
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OS << "// SelectionDAGIsel code.\n";
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OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
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OS << " switch (IntrinsicID) {\n";
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OS << " default: break;\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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switch (Ints[i].ModRef) {
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default: break;
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case CodeGenIntrinsic::NoMem:
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OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
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break;
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}
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}
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OS << " return true; // These intrinsics do not reference memory.\n";
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
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OS << "// Return true if doesn't access or only reads memory.\n";
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OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
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OS << " switch (IntrinsicID) {\n";
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OS << " default: break;\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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switch (Ints[i].ModRef) {
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default: break;
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case CodeGenIntrinsic::NoMem:
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case CodeGenIntrinsic::ReadArgMem:
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case CodeGenIntrinsic::ReadMem:
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OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
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break;
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}
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}
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OS << " return true; // These intrinsics have no side effects.\n";
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
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OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
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OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
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OS << " switch (F->getIntrinsicID()) {\n";
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OS << " default: BuiltinName = \"\"; break;\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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if (!Ints[i].GCCBuiltinName.empty()) {
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OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
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<< Ints[i].GCCBuiltinName << "\"; break;\n";
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}
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}
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
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BIMTy BuiltinMap;
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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if (!Ints[i].GCCBuiltinName.empty()) {
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std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
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Ints[i].TargetPrefix);
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if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
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throw "Intrinsic '" + Ints[i].TheDef->getName() +
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"': duplicate GCC builtin name!";
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}
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}
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OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
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OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
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OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
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OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
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OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
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OS << " if (0);\n";
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// Note: this could emit significantly better code if we cared.
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for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
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OS << " else if (";
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if (!I->first.second.empty()) {
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// Emit this as a strcmp, so it can be constant folded by the FE.
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OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
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<< " ";
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}
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OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
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OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
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}
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OS << " else\n";
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OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";
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OS << "#endif\n\n";
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}
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