It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/IntrinsicEmitter.cpp b/utils/TableGen/IntrinsicEmitter.cpp
new file mode 100644
index 0000000..89e9621
--- /dev/null
+++ b/utils/TableGen/IntrinsicEmitter.cpp
@@ -0,0 +1,389 @@
+//===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend emits information about intrinsic functions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IntrinsicEmitter.h"
+#include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+#include <algorithm>
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// IntrinsicEmitter Implementation
+//===----------------------------------------------------------------------===//
+
+void IntrinsicEmitter::run(std::ostream &OS) {
+ EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
+
+ std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
+
+ // Emit the enum information.
+ EmitEnumInfo(Ints, OS);
+
+ // Emit the intrinsic ID -> name table.
+ EmitIntrinsicToNameTable(Ints, OS);
+
+ // Emit the function name recognizer.
+ EmitFnNameRecognizer(Ints, OS);
+
+ // Emit the intrinsic verifier.
+ EmitVerifier(Ints, OS);
+
+ // Emit the intrinsic declaration generator.
+ EmitGenerator(Ints, OS);
+
+ // Emit mod/ref info for each function.
+ EmitModRefInfo(Ints, OS);
+
+ // Emit table of non-memory accessing intrinsics.
+ EmitNoMemoryInfo(Ints, OS);
+
+ // Emit side effect info for each intrinsic.
+ EmitSideEffectInfo(Ints, OS);
+
+ // Emit a list of intrinsics with corresponding GCC builtins.
+ EmitGCCBuiltinList(Ints, OS);
+
+ // Emit code to translate GCC builtins into LLVM intrinsics.
+ EmitIntrinsicToGCCBuiltinMap(Ints, OS);
+}
+
+void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// Enum values for Intrinsics.h\n";
+ OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ OS << " " << Ints[i].EnumName;
+ OS << ((i != e-1) ? ", " : " ");
+ OS << std::string(40-Ints[i].EnumName.size(), ' ')
+ << "// " << Ints[i].Name << "\n";
+ }
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ // Build a function name -> intrinsic name mapping.
+ std::map<std::string, unsigned> IntMapping;
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ IntMapping[Ints[i].Name] = i;
+
+ OS << "// Function name -> enum value recognizer code.\n";
+ OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
+ OS << " switch (Name[5]) {\n";
+ OS << " default:\n";
+ // Emit the intrinsics in sorted order.
+ char LastChar = 0;
+ for (std::map<std::string, unsigned>::iterator I = IntMapping.begin(),
+ E = IntMapping.end(); I != E; ++I) {
+ if (I->first[5] != LastChar) {
+ LastChar = I->first[5];
+ OS << " break;\n";
+ OS << " case '" << LastChar << "':\n";
+ }
+
+ // For overloaded intrinsics, only the prefix needs to match
+ if (Ints[I->second].isOverloaded)
+ OS << " if (Len >= " << I->first.size()
+ << " && !memcmp(Name, \"" << I->first << "\", " << I->first.size()
+ << ")) return Intrinsic::" << Ints[I->second].EnumName << ";\n";
+ else
+ OS << " if (Len == " << I->first.size()
+ << " && !memcmp(Name, \"" << I->first << "\", Len)) return Intrinsic::"
+ << Ints[I->second].EnumName << ";\n";
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// Intrinsic ID to name table\n";
+ OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
+ OS << " // Note that entry #0 is the invalid intrinsic!\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ OS << " \"" << Ints[i].Name << "\",\n";
+ OS << "#endif\n\n";
+}
+
+static bool EmitTypeVerify(std::ostream &OS, Record *ArgType) {
+ if (ArgType->getValueAsString("TypeVal") == "...") return true;
+
+ OS << "(int)" << ArgType->getValueAsString("TypeVal") << ", ";
+ // If this is an integer type, check the width is correct.
+ if (ArgType->isSubClassOf("LLVMIntegerType"))
+ OS << ArgType->getValueAsInt("Width") << ", ";
+
+ // If this is a vector type, check that the subtype and size are correct.
+ else if (ArgType->isSubClassOf("LLVMVectorType")) {
+ EmitTypeVerify(OS, ArgType->getValueAsDef("ElTy"));
+ OS << ArgType->getValueAsInt("NumElts") << ", ";
+ }
+
+ return false;
+}
+
+static void EmitTypeGenerate(std::ostream &OS, Record *ArgType,
+ unsigned &ArgNo) {
+ if (ArgType->isSubClassOf("LLVMIntegerType")) {
+ unsigned BitWidth = ArgType->getValueAsInt("Width");
+ // NOTE: The ArgNo variable here is not the absolute argument number, it is
+ // the index of the "arbitrary" type in the Tys array passed to the
+ // Intrinsic::getDeclaration function. Consequently, we only want to
+ // increment it when we actually hit an arbitrary integer type which is
+ // identified by BitWidth == 0. Getting this wrong leads to very subtle
+ // bugs!
+ if (BitWidth == 0)
+ OS << "Tys[" << ArgNo++ << "]";
+ else
+ OS << "IntegerType::get(" << BitWidth << ")";
+ } else if (ArgType->isSubClassOf("LLVMVectorType")) {
+ OS << "VectorType::get(";
+ EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
+ OS << ", " << ArgType->getValueAsInt("NumElts") << ")";
+ } else if (ArgType->isSubClassOf("LLVMPointerType")) {
+ OS << "PointerType::get(";
+ EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
+ OS << ")";
+ } else if (ArgType->isSubClassOf("LLVMEmptyStructType")) {
+ OS << "StructType::get(std::vector<const Type *>())";
+ } else {
+ OS << "Type::getPrimitiveType(";
+ OS << ArgType->getValueAsString("TypeVal") << ")";
+ }
+}
+
+/// RecordListComparator - Provide a determinstic comparator for lists of
+/// records.
+namespace {
+ struct RecordListComparator {
+ bool operator()(const std::vector<Record*> &LHS,
+ const std::vector<Record*> &RHS) const {
+ unsigned i = 0;
+ do {
+ if (i == RHS.size()) return false; // RHS is shorter than LHS.
+ if (LHS[i] != RHS[i])
+ return LHS[i]->getName() < RHS[i]->getName();
+ } while (++i != LHS.size());
+
+ return i != RHS.size();
+ }
+ };
+}
+
+void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
+ OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
+ OS << " switch (ID) {\n";
+ OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
+
+ // This checking can emit a lot of very common code. To reduce the amount of
+ // code that we emit, batch up cases that have identical types. This avoids
+ // problems where GCC can run out of memory compiling Verifier.cpp.
+ typedef std::map<std::vector<Record*>, std::vector<unsigned>,
+ RecordListComparator> MapTy;
+ MapTy UniqueArgInfos;
+
+ // Compute the unique argument type info.
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
+
+ // Loop through the array, emitting one comparison for each batch.
+ for (MapTy::iterator I = UniqueArgInfos.begin(),
+ E = UniqueArgInfos.end(); I != E; ++I) {
+ for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
+ OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
+ << Ints[I->second[i]].Name << "\n";
+ }
+
+ const std::vector<Record*> &ArgTypes = I->first;
+ OS << " VerifyIntrinsicPrototype(ID, IF, ";
+ bool VarArg = false;
+ for (unsigned j = 0; j != ArgTypes.size(); ++j) {
+ VarArg = EmitTypeVerify(OS, ArgTypes[j]);
+ if (VarArg) {
+ if ((j+1) != ArgTypes.size())
+ throw "Var arg type not last argument";
+ break;
+ }
+ }
+
+ OS << (VarArg ? "-2);\n" : "-1);\n");
+ OS << " break;\n";
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// Code for generating Intrinsic function declarations.\n";
+ OS << "#ifdef GET_INTRINSIC_GENERATOR\n";
+ OS << " switch (id) {\n";
+ OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
+
+ // Similar to GET_INTRINSIC_VERIFIER, batch up cases that have identical
+ // types.
+ typedef std::map<std::vector<Record*>, std::vector<unsigned>,
+ RecordListComparator> MapTy;
+ MapTy UniqueArgInfos;
+
+ // Compute the unique argument type info.
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
+
+ // Loop through the array, emitting one generator for each batch.
+ for (MapTy::iterator I = UniqueArgInfos.begin(),
+ E = UniqueArgInfos.end(); I != E; ++I) {
+ for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
+ OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
+ << Ints[I->second[i]].Name << "\n";
+ }
+
+ const std::vector<Record*> &ArgTypes = I->first;
+ unsigned N = ArgTypes.size();
+
+ if (ArgTypes[N-1]->getValueAsString("TypeVal") == "...") {
+ OS << " IsVarArg = true;\n";
+ --N;
+ }
+
+ unsigned ArgNo = 0;
+ OS << " ResultTy = ";
+ EmitTypeGenerate(OS, ArgTypes[0], ArgNo);
+ OS << ";\n";
+
+ for (unsigned j = 1; j != N; ++j) {
+ OS << " ArgTys.push_back(";
+ EmitTypeGenerate(OS, ArgTypes[j], ArgNo);
+ OS << ");\n";
+ }
+ OS << " break;\n";
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// BasicAliasAnalysis code.\n";
+ OS << "#ifdef GET_MODREF_BEHAVIOR\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ switch (Ints[i].ModRef) {
+ default: break;
+ case CodeGenIntrinsic::NoMem:
+ OS << " NoMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
+ break;
+ case CodeGenIntrinsic::ReadArgMem:
+ case CodeGenIntrinsic::ReadMem:
+ OS << " OnlyReadsMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
+ break;
+ }
+ }
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
+ OS << "// SelectionDAGIsel code.\n";
+ OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
+ OS << " switch (IntrinsicID) {\n";
+ OS << " default: break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ switch (Ints[i].ModRef) {
+ default: break;
+ case CodeGenIntrinsic::NoMem:
+ OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
+ break;
+ }
+ }
+ OS << " return true; // These intrinsics have no side effects.\n";
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
+ OS << "// Return true if doesn't access or only reads memory.\n";
+ OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
+ OS << " switch (IntrinsicID) {\n";
+ OS << " default: break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ switch (Ints[i].ModRef) {
+ default: break;
+ case CodeGenIntrinsic::NoMem:
+ case CodeGenIntrinsic::ReadArgMem:
+ case CodeGenIntrinsic::ReadMem:
+ OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
+ break;
+ }
+ }
+ OS << " return true; // These intrinsics have no side effects.\n";
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
+ OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
+ OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
+ OS << " switch (F->getIntrinsicID()) {\n";
+ OS << " default: BuiltinName = \"\"; break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ if (!Ints[i].GCCBuiltinName.empty()) {
+ OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
+ << Ints[i].GCCBuiltinName << "\"; break;\n";
+ }
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
+ BIMTy BuiltinMap;
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ if (!Ints[i].GCCBuiltinName.empty()) {
+ std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
+ Ints[i].TargetPrefix);
+ if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
+ throw "Intrinsic '" + Ints[i].TheDef->getName() +
+ "': duplicate GCC builtin name!";
+ }
+ }
+
+ OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
+ OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
+ OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
+ OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
+ OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
+ OS << " if (0);\n";
+ // Note: this could emit significantly better code if we cared.
+ for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
+ OS << " else if (";
+ if (!I->first.second.empty()) {
+ // Emit this as a strcmp, so it can be constant folded by the FE.
+ OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
+ << " ";
+ }
+ OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
+ OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
+ }
+ OS << " else\n";
+ OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";
+ OS << "#endif\n\n";
+}