+++ /dev/null
-//===-- AutoUpgrade.cpp - Implement auto-upgrade helper functions ---------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the auto-upgrade helper functions
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/AutoUpgrade.h"
-#include "llvm/Constants.h"
-#include "llvm/Function.h"
-#include "llvm/IRBuilder.h"
-#include "llvm/Instruction.h"
-#include "llvm/IntrinsicInst.h"
-#include "llvm/LLVMContext.h"
-#include "llvm/Module.h"
-#include "llvm/Support/CFG.h"
-#include "llvm/Support/CallSite.h"
-#include "llvm/Support/ErrorHandling.h"
-#include <cstring>
-using namespace llvm;
-
-// Upgrade the declarations of the SSE4.1 functions whose arguments have
-// changed their type from v4f32 to v2i64.
-static bool UpgradeSSE41Function(Function* F, Intrinsic::ID IID,
- Function *&NewFn) {
- // Check whether this is an old version of the function, which received
- // v4f32 arguments.
- Type *Arg0Type = F->getFunctionType()->getParamType(0);
- if (Arg0Type != VectorType::get(Type::getFloatTy(F->getContext()), 4))
- return false;
-
- // Yes, it's old, replace it with new version.
- F->setName(F->getName() + ".old");
- NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
- return true;
-}
-
-static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
- assert(F && "Illegal to upgrade a non-existent Function.");
-
- // Quickly eliminate it, if it's not a candidate.
- StringRef Name = F->getName();
- if (Name.size() <= 8 || !Name.startswith("llvm."))
- return false;
- Name = Name.substr(5); // Strip off "llvm."
-
- switch (Name[0]) {
- default: break;
- case 'a': {
- if (Name.startswith("arm.neon.vclz")) {
- Type* args[2] = {
- F->arg_begin()->getType(),
- Type::getInt1Ty(F->getContext())
- };
- // Can't use Intrinsic::getDeclaration here as it adds a ".i1" to
- // the end of the name. Change name from llvm.arm.neon.vclz.* to
- // llvm.ctlz.*
- FunctionType* fType = FunctionType::get(F->getReturnType(), args, false);
- NewFn = Function::Create(fType, F->getLinkage(),
- "llvm.ctlz." + Name.substr(14), F->getParent());
- return true;
- }
- if (Name.startswith("arm.neon.vcnt")) {
- NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctpop,
- F->arg_begin()->getType());
- return true;
- }
- break;
- }
- case 'c': {
- if (Name.startswith("ctlz.") && F->arg_size() == 1) {
- F->setName(Name + ".old");
- NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
- F->arg_begin()->getType());
- return true;
- }
- if (Name.startswith("cttz.") && F->arg_size() == 1) {
- F->setName(Name + ".old");
- NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
- F->arg_begin()->getType());
- return true;
- }
- break;
- }
- case 'x': {
- if (Name.startswith("x86.sse2.pcmpeq.") ||
- Name.startswith("x86.sse2.pcmpgt.") ||
- Name.startswith("x86.avx2.pcmpeq.") ||
- Name.startswith("x86.avx2.pcmpgt.") ||
- Name.startswith("x86.avx.vpermil.") ||
- Name == "x86.avx.movnt.dq.256" ||
- Name == "x86.avx.movnt.pd.256" ||
- Name == "x86.avx.movnt.ps.256" ||
- (Name.startswith("x86.xop.vpcom") && F->arg_size() == 2)) {
- NewFn = 0;
- return true;
- }
- // SSE4.1 ptest functions may have an old signature.
- if (Name.startswith("x86.sse41.ptest")) {
- if (Name == "x86.sse41.ptestc")
- return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestc, NewFn);
- if (Name == "x86.sse41.ptestz")
- return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestz, NewFn);
- if (Name == "x86.sse41.ptestnzc")
- return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
- }
- // frcz.ss/sd may need to have an argument dropped
- if (Name.startswith("x86.xop.vfrcz.ss") && F->arg_size() == 2) {
- F->setName(Name + ".old");
- NewFn = Intrinsic::getDeclaration(F->getParent(),
- Intrinsic::x86_xop_vfrcz_ss);
- return true;
- }
- if (Name.startswith("x86.xop.vfrcz.sd") && F->arg_size() == 2) {
- F->setName(Name + ".old");
- NewFn = Intrinsic::getDeclaration(F->getParent(),
- Intrinsic::x86_xop_vfrcz_sd);
- return true;
- }
- // Fix the FMA4 intrinsics to remove the 4
- if (Name.startswith("x86.fma4.")) {
- F->setName("llvm.x86.fma" + Name.substr(8));
- NewFn = F;
- return true;
- }
- break;
- }
- }
-
- // This may not belong here. This function is effectively being overloaded
- // to both detect an intrinsic which needs upgrading, and to provide the
- // upgraded form of the intrinsic. We should perhaps have two separate
- // functions for this.
- return false;
-}
-
-bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
- NewFn = 0;
- bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
-
- // Upgrade intrinsic attributes. This does not change the function.
- if (NewFn)
- F = NewFn;
- if (unsigned id = F->getIntrinsicID())
- F->setAttributes(Intrinsic::getAttributes(F->getContext(),
- (Intrinsic::ID)id));
- return Upgraded;
-}
-
-bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
- // Nothing to do yet.
- return false;
-}
-
-// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
-// upgraded intrinsic. All argument and return casting must be provided in
-// order to seamlessly integrate with existing context.
-void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
- Function *F = CI->getCalledFunction();
- LLVMContext &C = CI->getContext();
- IRBuilder<> Builder(C);
- Builder.SetInsertPoint(CI->getParent(), CI);
-
- assert(F && "Intrinsic call is not direct?");
-
- if (!NewFn) {
- // Get the Function's name.
- StringRef Name = F->getName();
-
- Value *Rep;
- // Upgrade packed integer vector compares intrinsics to compare instructions
- if (Name.startswith("llvm.x86.sse2.pcmpeq.") ||
- Name.startswith("llvm.x86.avx2.pcmpeq.")) {
- Rep = Builder.CreateICmpEQ(CI->getArgOperand(0), CI->getArgOperand(1),
- "pcmpeq");
- // need to sign extend since icmp returns vector of i1
- Rep = Builder.CreateSExt(Rep, CI->getType(), "");
- } else if (Name.startswith("llvm.x86.sse2.pcmpgt.") ||
- Name.startswith("llvm.x86.avx2.pcmpgt.")) {
- Rep = Builder.CreateICmpSGT(CI->getArgOperand(0), CI->getArgOperand(1),
- "pcmpgt");
- // need to sign extend since icmp returns vector of i1
- Rep = Builder.CreateSExt(Rep, CI->getType(), "");
- } else if (Name == "llvm.x86.avx.movnt.dq.256" ||
- Name == "llvm.x86.avx.movnt.ps.256" ||
- Name == "llvm.x86.avx.movnt.pd.256") {
- IRBuilder<> Builder(C);
- Builder.SetInsertPoint(CI->getParent(), CI);
-
- Module *M = F->getParent();
- SmallVector<Value *, 1> Elts;
- Elts.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
- MDNode *Node = MDNode::get(C, Elts);
-
- Value *Arg0 = CI->getArgOperand(0);
- Value *Arg1 = CI->getArgOperand(1);
-
- // Convert the type of the pointer to a pointer to the stored type.
- Value *BC = Builder.CreateBitCast(Arg0,
- PointerType::getUnqual(Arg1->getType()),
- "cast");
- StoreInst *SI = Builder.CreateStore(Arg1, BC);
- SI->setMetadata(M->getMDKindID("nontemporal"), Node);
- SI->setAlignment(16);
-
- // Remove intrinsic.
- CI->eraseFromParent();
- return;
- } else if (Name.startswith("llvm.x86.xop.vpcom")) {
- Intrinsic::ID intID;
- if (Name.endswith("ub"))
- intID = Intrinsic::x86_xop_vpcomub;
- else if (Name.endswith("uw"))
- intID = Intrinsic::x86_xop_vpcomuw;
- else if (Name.endswith("ud"))
- intID = Intrinsic::x86_xop_vpcomud;
- else if (Name.endswith("uq"))
- intID = Intrinsic::x86_xop_vpcomuq;
- else if (Name.endswith("b"))
- intID = Intrinsic::x86_xop_vpcomb;
- else if (Name.endswith("w"))
- intID = Intrinsic::x86_xop_vpcomw;
- else if (Name.endswith("d"))
- intID = Intrinsic::x86_xop_vpcomd;
- else if (Name.endswith("q"))
- intID = Intrinsic::x86_xop_vpcomq;
- else
- llvm_unreachable("Unknown suffix");
-
- Name = Name.substr(18); // strip off "llvm.x86.xop.vpcom"
- unsigned Imm;
- if (Name.startswith("lt"))
- Imm = 0;
- else if (Name.startswith("le"))
- Imm = 1;
- else if (Name.startswith("gt"))
- Imm = 2;
- else if (Name.startswith("ge"))
- Imm = 3;
- else if (Name.startswith("eq"))
- Imm = 4;
- else if (Name.startswith("ne"))
- Imm = 5;
- else if (Name.startswith("true"))
- Imm = 6;
- else if (Name.startswith("false"))
- Imm = 7;
- else
- llvm_unreachable("Unknown condition");
-
- Function *VPCOM = Intrinsic::getDeclaration(F->getParent(), intID);
- Rep = Builder.CreateCall3(VPCOM, CI->getArgOperand(0),
- CI->getArgOperand(1), Builder.getInt8(Imm));
- } else {
- bool PD128 = false, PD256 = false, PS128 = false, PS256 = false;
- if (Name == "llvm.x86.avx.vpermil.pd.256")
- PD256 = true;
- else if (Name == "llvm.x86.avx.vpermil.pd")
- PD128 = true;
- else if (Name == "llvm.x86.avx.vpermil.ps.256")
- PS256 = true;
- else if (Name == "llvm.x86.avx.vpermil.ps")
- PS128 = true;
-
- if (PD256 || PD128 || PS256 || PS128) {
- Value *Op0 = CI->getArgOperand(0);
- unsigned Imm = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
- SmallVector<Constant*, 8> Idxs;
-
- if (PD128)
- for (unsigned i = 0; i != 2; ++i)
- Idxs.push_back(Builder.getInt32((Imm >> i) & 0x1));
- else if (PD256)
- for (unsigned l = 0; l != 4; l+=2)
- for (unsigned i = 0; i != 2; ++i)
- Idxs.push_back(Builder.getInt32(((Imm >> (l+i)) & 0x1) + l));
- else if (PS128)
- for (unsigned i = 0; i != 4; ++i)
- Idxs.push_back(Builder.getInt32((Imm >> (2 * i)) & 0x3));
- else if (PS256)
- for (unsigned l = 0; l != 8; l+=4)
- for (unsigned i = 0; i != 4; ++i)
- Idxs.push_back(Builder.getInt32(((Imm >> (2 * i)) & 0x3) + l));
- else
- llvm_unreachable("Unexpected function");
-
- Rep = Builder.CreateShuffleVector(Op0, Op0, ConstantVector::get(Idxs));
- } else {
- llvm_unreachable("Unknown function for CallInst upgrade.");
- }
- }
-
- CI->replaceAllUsesWith(Rep);
- CI->eraseFromParent();
- return;
- }
-
- std::string Name = CI->getName().str();
- CI->setName(Name + ".old");
-
- switch (NewFn->getIntrinsicID()) {
- default:
- llvm_unreachable("Unknown function for CallInst upgrade.");
-
- case Intrinsic::ctlz:
- case Intrinsic::cttz:
- assert(CI->getNumArgOperands() == 1 &&
- "Mismatch between function args and call args");
- CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
- Builder.getFalse(), Name));
- CI->eraseFromParent();
- return;
-
- case Intrinsic::arm_neon_vclz: {
- // Change name from llvm.arm.neon.vclz.* to llvm.ctlz.*
- CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
- Builder.getFalse(),
- "llvm.ctlz." + Name.substr(14)));
- CI->eraseFromParent();
- return;
- }
- case Intrinsic::ctpop: {
- CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(0)));
- CI->eraseFromParent();
- return;
- }
-
- case Intrinsic::x86_xop_vfrcz_ss:
- case Intrinsic::x86_xop_vfrcz_sd:
- CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(1),
- Name));
- CI->eraseFromParent();
- return;
-
- case Intrinsic::x86_sse41_ptestc:
- case Intrinsic::x86_sse41_ptestz:
- case Intrinsic::x86_sse41_ptestnzc: {
- // The arguments for these intrinsics used to be v4f32, and changed
- // to v2i64. This is purely a nop, since those are bitwise intrinsics.
- // So, the only thing required is a bitcast for both arguments.
- // First, check the arguments have the old type.
- Value *Arg0 = CI->getArgOperand(0);
- if (Arg0->getType() != VectorType::get(Type::getFloatTy(C), 4))
- return;
-
- // Old intrinsic, add bitcasts
- Value *Arg1 = CI->getArgOperand(1);
-
- Value *BC0 =
- Builder.CreateBitCast(Arg0,
- VectorType::get(Type::getInt64Ty(C), 2),
- "cast");
- Value *BC1 =
- Builder.CreateBitCast(Arg1,
- VectorType::get(Type::getInt64Ty(C), 2),
- "cast");
-
- CallInst* NewCall = Builder.CreateCall2(NewFn, BC0, BC1, Name);
- CI->replaceAllUsesWith(NewCall);
- CI->eraseFromParent();
- return;
- }
- }
-}
-
-// This tests each Function to determine if it needs upgrading. When we find
-// one we are interested in, we then upgrade all calls to reflect the new
-// function.
-void llvm::UpgradeCallsToIntrinsic(Function* F) {
- assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
-
- // Upgrade the function and check if it is a totaly new function.
- Function *NewFn;
- if (UpgradeIntrinsicFunction(F, NewFn)) {
- if (NewFn != F) {
- // Replace all uses to the old function with the new one if necessary.
- for (Value::use_iterator UI = F->use_begin(), UE = F->use_end();
- UI != UE; ) {
- if (CallInst *CI = dyn_cast<CallInst>(*UI++))
- UpgradeIntrinsicCall(CI, NewFn);
- }
- // Remove old function, no longer used, from the module.
- F->eraseFromParent();
- }
- }
-}
-
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