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AutoUpgrade.cpp
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//===-- 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.
// This is where deprecated IR intrinsics and other IR features are updated to
// current specifications.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/AutoUpgrade.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Regex.h"
#include <cstring>
using namespace llvm;
static void rename(GlobalValue *GV) { GV->setName(GV->getName() + ".old"); }
// Upgrade the declarations of the SSE4.1 ptest intrinsics whose arguments have
// changed their type from v4f32 to v2i64.
static bool UpgradePTESTIntrinsic(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.
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
return true;
}
// Upgrade the declarations of intrinsic functions whose 8-bit immediate mask
// arguments have changed their type from i32 to i8.
static bool UpgradeX86IntrinsicsWith8BitMask(Function *F, Intrinsic::ID IID,
Function *&NewFn) {
// Check that the last argument is an i32.
Type *LastArgType = F->getFunctionType()->getParamType(
F->getFunctionType()->getNumParams() - 1);
if (!LastArgType->isIntegerTy(32))
return false;
// Move this function aside and map down.
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
return true;
}
static bool ShouldUpgradeX86Intrinsic(Function *F, StringRef Name) {
// All of the intrinsics matches below should be marked with which llvm
// version started autoupgrading them. At some point in the future we would
// like to use this information to remove upgrade code for some older
// intrinsics. It is currently undecided how we will determine that future
// point.
if (Name.startswith("sse2.pcmpeq.") || // Added in 3.1
Name.startswith("sse2.pcmpgt.") || // Added in 3.1
Name.startswith("avx2.pcmpeq.") || // Added in 3.1
Name.startswith("avx2.pcmpgt.") || // Added in 3.1
Name.startswith("avx512.mask.pcmpeq.") || // Added in 3.9
Name.startswith("avx512.mask.pcmpgt.") || // Added in 3.9
Name == "sse.add.ss" || // Added in 4.0
Name == "sse2.add.sd" || // Added in 4.0
Name == "sse.sub.ss" || // Added in 4.0
Name == "sse2.sub.sd" || // Added in 4.0
Name == "sse.mul.ss" || // Added in 4.0
Name == "sse2.mul.sd" || // Added in 4.0
Name == "sse.div.ss" || // Added in 4.0
Name == "sse2.div.sd" || // Added in 4.0
Name == "sse41.pmaxsb" || // Added in 3.9
Name == "sse2.pmaxs.w" || // Added in 3.9
Name == "sse41.pmaxsd" || // Added in 3.9
Name == "sse2.pmaxu.b" || // Added in 3.9
Name == "sse41.pmaxuw" || // Added in 3.9
Name == "sse41.pmaxud" || // Added in 3.9
Name == "sse41.pminsb" || // Added in 3.9
Name == "sse2.pmins.w" || // Added in 3.9
Name == "sse41.pminsd" || // Added in 3.9
Name == "sse2.pminu.b" || // Added in 3.9
Name == "sse41.pminuw" || // Added in 3.9
Name == "sse41.pminud" || // Added in 3.9
Name.startswith("avx512.mask.pshuf.b.") || // Added in 4.0
Name.startswith("avx2.pmax") || // Added in 3.9
Name.startswith("avx2.pmin") || // Added in 3.9
Name.startswith("avx512.mask.pmax") || // Added in 4.0
Name.startswith("avx512.mask.pmin") || // Added in 4.0
Name.startswith("avx2.vbroadcast") || // Added in 3.8
Name.startswith("avx2.pbroadcast") || // Added in 3.8
Name.startswith("avx.vpermil.") || // Added in 3.1
Name.startswith("sse2.pshuf") || // Added in 3.9
Name.startswith("avx512.pbroadcast") || // Added in 3.9
Name.startswith("avx512.mask.broadcast.s") || // Added in 3.9
Name.startswith("avx512.mask.movddup") || // Added in 3.9
Name.startswith("avx512.mask.movshdup") || // Added in 3.9
Name.startswith("avx512.mask.movsldup") || // Added in 3.9
Name.startswith("avx512.mask.pshuf.d.") || // Added in 3.9
Name.startswith("avx512.mask.pshufl.w.") || // Added in 3.9
Name.startswith("avx512.mask.pshufh.w.") || // Added in 3.9
Name.startswith("avx512.mask.shuf.p") || // Added in 4.0
Name.startswith("avx512.mask.vpermil.p") || // Added in 3.9
Name.startswith("avx512.mask.perm.df.") || // Added in 3.9
Name.startswith("avx512.mask.perm.di.") || // Added in 3.9
Name.startswith("avx512.mask.punpckl") || // Added in 3.9
Name.startswith("avx512.mask.punpckh") || // Added in 3.9
Name.startswith("avx512.mask.unpckl.") || // Added in 3.9
Name.startswith("avx512.mask.unpckh.") || // Added in 3.9
Name.startswith("avx512.mask.pand.") || // Added in 3.9
Name.startswith("avx512.mask.pandn.") || // Added in 3.9
Name.startswith("avx512.mask.por.") || // Added in 3.9
Name.startswith("avx512.mask.pxor.") || // Added in 3.9
Name.startswith("avx512.mask.and.") || // Added in 3.9
Name.startswith("avx512.mask.andn.") || // Added in 3.9
Name.startswith("avx512.mask.or.") || // Added in 3.9
Name.startswith("avx512.mask.xor.") || // Added in 3.9
Name.startswith("avx512.mask.padd.") || // Added in 4.0
Name.startswith("avx512.mask.psub.") || // Added in 4.0
Name.startswith("avx512.mask.pmull.") || // Added in 4.0
Name.startswith("avx512.mask.cvtdq2pd.") || // Added in 4.0
Name.startswith("avx512.mask.cvtudq2pd.") || // Added in 4.0
Name.startswith("avx512.mask.pmul.dq.") || // Added in 4.0
Name.startswith("avx512.mask.pmulu.dq.") || // Added in 4.0
Name.startswith("avx512.mask.packsswb.") || // Added in 5.0
Name.startswith("avx512.mask.packssdw.") || // Added in 5.0
Name.startswith("avx512.mask.packuswb.") || // Added in 5.0
Name.startswith("avx512.mask.packusdw.") || // Added in 5.0
Name == "avx512.mask.add.pd.128" || // Added in 4.0
Name == "avx512.mask.add.pd.256" || // Added in 4.0
Name == "avx512.mask.add.ps.128" || // Added in 4.0
Name == "avx512.mask.add.ps.256" || // Added in 4.0
Name == "avx512.mask.div.pd.128" || // Added in 4.0
Name == "avx512.mask.div.pd.256" || // Added in 4.0
Name == "avx512.mask.div.ps.128" || // Added in 4.0
Name == "avx512.mask.div.ps.256" || // Added in 4.0
Name == "avx512.mask.mul.pd.128" || // Added in 4.0
Name == "avx512.mask.mul.pd.256" || // Added in 4.0
Name == "avx512.mask.mul.ps.128" || // Added in 4.0
Name == "avx512.mask.mul.ps.256" || // Added in 4.0
Name == "avx512.mask.sub.pd.128" || // Added in 4.0
Name == "avx512.mask.sub.pd.256" || // Added in 4.0
Name == "avx512.mask.sub.ps.128" || // Added in 4.0
Name == "avx512.mask.sub.ps.256" || // Added in 4.0
Name == "avx512.mask.max.pd.128" || // Added in 5.0
Name == "avx512.mask.max.pd.256" || // Added in 5.0
Name == "avx512.mask.max.ps.128" || // Added in 5.0
Name == "avx512.mask.max.ps.256" || // Added in 5.0
Name == "avx512.mask.min.pd.128" || // Added in 5.0
Name == "avx512.mask.min.pd.256" || // Added in 5.0
Name == "avx512.mask.min.ps.128" || // Added in 5.0
Name == "avx512.mask.min.ps.256" || // Added in 5.0
Name.startswith("avx512.mask.vpermilvar.") || // Added in 4.0
Name.startswith("avx512.mask.psll.d") || // Added in 4.0
Name.startswith("avx512.mask.psll.q") || // Added in 4.0
Name.startswith("avx512.mask.psll.w") || // Added in 4.0
Name.startswith("avx512.mask.psra.d") || // Added in 4.0
Name.startswith("avx512.mask.psra.q") || // Added in 4.0
Name.startswith("avx512.mask.psra.w") || // Added in 4.0
Name.startswith("avx512.mask.psrl.d") || // Added in 4.0
Name.startswith("avx512.mask.psrl.q") || // Added in 4.0
Name.startswith("avx512.mask.psrl.w") || // Added in 4.0
Name.startswith("avx512.mask.pslli") || // Added in 4.0
Name.startswith("avx512.mask.psrai") || // Added in 4.0
Name.startswith("avx512.mask.psrli") || // Added in 4.0
Name.startswith("avx512.mask.psllv") || // Added in 4.0
Name.startswith("avx512.mask.psrav") || // Added in 4.0
Name.startswith("avx512.mask.psrlv") || // Added in 4.0
Name.startswith("sse41.pmovsx") || // Added in 3.8
Name.startswith("sse41.pmovzx") || // Added in 3.9
Name.startswith("avx2.pmovsx") || // Added in 3.9
Name.startswith("avx2.pmovzx") || // Added in 3.9
Name.startswith("avx512.mask.pmovsx") || // Added in 4.0
Name.startswith("avx512.mask.pmovzx") || // Added in 4.0
Name.startswith("avx512.mask.lzcnt.") || // Added in 5.0
Name == "sse2.cvtdq2pd" || // Added in 3.9
Name == "sse2.cvtps2pd" || // Added in 3.9
Name == "avx.cvtdq2.pd.256" || // Added in 3.9
Name == "avx.cvt.ps2.pd.256" || // Added in 3.9
Name.startswith("avx.vinsertf128.") || // Added in 3.7
Name == "avx2.vinserti128" || // Added in 3.7
Name.startswith("avx512.mask.insert") || // Added in 4.0
Name.startswith("avx.vextractf128.") || // Added in 3.7
Name == "avx2.vextracti128" || // Added in 3.7
Name.startswith("avx512.mask.vextract") || // Added in 4.0
Name.startswith("sse4a.movnt.") || // Added in 3.9
Name.startswith("avx.movnt.") || // Added in 3.2
Name.startswith("avx512.storent.") || // Added in 3.9
Name == "sse2.storel.dq" || // Added in 3.9
Name.startswith("sse.storeu.") || // Added in 3.9
Name.startswith("sse2.storeu.") || // Added in 3.9
Name.startswith("avx.storeu.") || // Added in 3.9
Name.startswith("avx512.mask.storeu.") || // Added in 3.9
Name.startswith("avx512.mask.store.p") || // Added in 3.9
Name.startswith("avx512.mask.store.b.") || // Added in 3.9
Name.startswith("avx512.mask.store.w.") || // Added in 3.9
Name.startswith("avx512.mask.store.d.") || // Added in 3.9
Name.startswith("avx512.mask.store.q.") || // Added in 3.9
Name.startswith("avx512.mask.loadu.") || // Added in 3.9
Name.startswith("avx512.mask.load.") || // Added in 3.9
Name == "sse42.crc32.64.8" || // Added in 3.4
Name.startswith("avx.vbroadcast.s") || // Added in 3.5
Name.startswith("avx512.mask.palignr.") || // Added in 3.9
Name.startswith("avx512.mask.valign.") || // Added in 4.0
Name.startswith("sse2.psll.dq") || // Added in 3.7
Name.startswith("sse2.psrl.dq") || // Added in 3.7
Name.startswith("avx2.psll.dq") || // Added in 3.7
Name.startswith("avx2.psrl.dq") || // Added in 3.7
Name.startswith("avx512.psll.dq") || // Added in 3.9
Name.startswith("avx512.psrl.dq") || // Added in 3.9
Name == "sse41.pblendw" || // Added in 3.7
Name.startswith("sse41.blendp") || // Added in 3.7
Name.startswith("avx.blend.p") || // Added in 3.7
Name == "avx2.pblendw" || // Added in 3.7
Name.startswith("avx2.pblendd.") || // Added in 3.7
Name.startswith("avx.vbroadcastf128") || // Added in 4.0
Name == "avx2.vbroadcasti128" || // Added in 3.7
Name == "xop.vpcmov" || // Added in 3.8
Name == "xop.vpcmov.256" || // Added in 5.0
Name.startswith("avx512.mask.move.s") || // Added in 4.0
(Name.startswith("xop.vpcom") && // Added in 3.2
F->arg_size() == 2))
return true;
return false;
}
static bool UpgradeX86IntrinsicFunction(Function *F, StringRef Name,
Function *&NewFn) {
// Only handle intrinsics that start with "x86.".
if (!Name.startswith("x86."))
return false;
// Remove "x86." prefix.
Name = Name.substr(4);
if (ShouldUpgradeX86Intrinsic(F, Name)) {
NewFn = nullptr;
return true;
}
// SSE4.1 ptest functions may have an old signature.
if (Name.startswith("sse41.ptest")) { // Added in 3.2
if (Name.substr(11) == "c")
return UpgradePTESTIntrinsic(F, Intrinsic::x86_sse41_ptestc, NewFn);
if (Name.substr(11) == "z")
return UpgradePTESTIntrinsic(F, Intrinsic::x86_sse41_ptestz, NewFn);
if (Name.substr(11) == "nzc")
return UpgradePTESTIntrinsic(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
}
// Several blend and other instructions with masks used the wrong number of
// bits.
if (Name == "sse41.insertps") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_insertps,
NewFn);
if (Name == "sse41.dppd") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dppd,
NewFn);
if (Name == "sse41.dpps") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_dpps,
NewFn);
if (Name == "sse41.mpsadbw") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_sse41_mpsadbw,
NewFn);
if (Name == "avx.dp.ps.256") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx_dp_ps_256,
NewFn);
if (Name == "avx2.mpsadbw") // Added in 3.6
return UpgradeX86IntrinsicsWith8BitMask(F, Intrinsic::x86_avx2_mpsadbw,
NewFn);
// frcz.ss/sd may need to have an argument dropped. Added in 3.2
if (Name.startswith("xop.vfrcz.ss") && F->arg_size() == 2) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_xop_vfrcz_ss);
return true;
}
if (Name.startswith("xop.vfrcz.sd") && F->arg_size() == 2) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::x86_xop_vfrcz_sd);
return true;
}
// Upgrade any XOP PERMIL2 index operand still using a float/double vector.
if (Name.startswith("xop.vpermil2")) { // Added in 3.9
auto Idx = F->getFunctionType()->getParamType(2);
if (Idx->isFPOrFPVectorTy()) {
rename(F);
unsigned IdxSize = Idx->getPrimitiveSizeInBits();
unsigned EltSize = Idx->getScalarSizeInBits();
Intrinsic::ID Permil2ID;
if (EltSize == 64 && IdxSize == 128)
Permil2ID = Intrinsic::x86_xop_vpermil2pd;
else if (EltSize == 32 && IdxSize == 128)
Permil2ID = Intrinsic::x86_xop_vpermil2ps;
else if (EltSize == 64 && IdxSize == 256)
Permil2ID = Intrinsic::x86_xop_vpermil2pd_256;
else
Permil2ID = Intrinsic::x86_xop_vpermil2ps_256;
NewFn = Intrinsic::getDeclaration(F->getParent(), Permil2ID);
return true;
}
}
return false;
}
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.rbit") || Name.startswith("aarch64.rbit")) {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::bitreverse,
F->arg_begin()->getType());
return true;
}
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;
}
Regex vldRegex("^arm\\.neon\\.vld([1234]|[234]lane)\\.v[a-z0-9]*$");
if (vldRegex.match(Name)) {
auto fArgs = F->getFunctionType()->params();
SmallVector<Type *, 4> Tys(fArgs.begin(), fArgs.end());
// Can't use Intrinsic::getDeclaration here as the return types might
// then only be structurally equal.
FunctionType* fType = FunctionType::get(F->getReturnType(), Tys, false);
NewFn = Function::Create(fType, F->getLinkage(),
"llvm." + Name + ".p0i8", F->getParent());
return true;
}
Regex vstRegex("^arm\\.neon\\.vst([1234]|[234]lane)\\.v[a-z0-9]*$");
if (vstRegex.match(Name)) {
static const Intrinsic::ID StoreInts[] = {Intrinsic::arm_neon_vst1,
Intrinsic::arm_neon_vst2,
Intrinsic::arm_neon_vst3,
Intrinsic::arm_neon_vst4};
static const Intrinsic::ID StoreLaneInts[] = {
Intrinsic::arm_neon_vst2lane, Intrinsic::arm_neon_vst3lane,
Intrinsic::arm_neon_vst4lane
};
auto fArgs = F->getFunctionType()->params();
Type *Tys[] = {fArgs[0], fArgs[1]};
if (Name.find("lane") == StringRef::npos)
NewFn = Intrinsic::getDeclaration(F->getParent(),
StoreInts[fArgs.size() - 3], Tys);
else
NewFn = Intrinsic::getDeclaration(F->getParent(),
StoreLaneInts[fArgs.size() - 5], Tys);
return true;
}
if (Name == "aarch64.thread.pointer" || Name == "arm.thread.pointer") {
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::thread_pointer);
return true;
}
break;
}
case 'c': {
if (Name.startswith("ctlz.") && F->arg_size() == 1) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
F->arg_begin()->getType());
return true;
}
if (Name.startswith("cttz.") && F->arg_size() == 1) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
F->arg_begin()->getType());
return true;
}
break;
}
case 'i': {
if (Name.startswith("invariant.start")) {
auto Args = F->getFunctionType()->params();
Type* ObjectPtr[1] = {Args[1]};
if (F->getName() !=
Intrinsic::getName(Intrinsic::invariant_start, ObjectPtr)) {
rename(F);
NewFn = Intrinsic::getDeclaration(
F->getParent(), Intrinsic::invariant_start, ObjectPtr);
return true;
}
}
if (Name.startswith("invariant.end")) {
auto Args = F->getFunctionType()->params();
Type* ObjectPtr[1] = {Args[2]};
if (F->getName() !=
Intrinsic::getName(Intrinsic::invariant_end, ObjectPtr)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::invariant_end, ObjectPtr);
return true;
}
}
break;
}
case 'm': {
if (Name.startswith("masked.load.")) {
Type *Tys[] = { F->getReturnType(), F->arg_begin()->getType() };
if (F->getName() != Intrinsic::getName(Intrinsic::masked_load, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::masked_load,
Tys);
return true;
}
}
if (Name.startswith("masked.store.")) {
auto Args = F->getFunctionType()->params();
Type *Tys[] = { Args[0], Args[1] };
if (F->getName() != Intrinsic::getName(Intrinsic::masked_store, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::masked_store,
Tys);
return true;
}
}
break;
}
case 'n': {
if (Name.startswith("nvvm.")) {
Name = Name.substr(5);
// The following nvvm intrinsics correspond exactly to an LLVM intrinsic.
Intrinsic::ID IID = StringSwitch<Intrinsic::ID>(Name)
.Cases("brev32", "brev64", Intrinsic::bitreverse)
.Case("clz.i", Intrinsic::ctlz)
.Case("popc.i", Intrinsic::ctpop)
.Default(Intrinsic::not_intrinsic);
if (IID != Intrinsic::not_intrinsic && F->arg_size() == 1) {
NewFn = Intrinsic::getDeclaration(F->getParent(), IID,
{F->getReturnType()});
return true;
}
// The following nvvm intrinsics correspond exactly to an LLVM idiom, but
// not to an intrinsic alone. We expand them in UpgradeIntrinsicCall.
//
// TODO: We could add lohi.i2d.
bool Expand = StringSwitch<bool>(Name)
.Cases("abs.i", "abs.ll", true)
.Cases("clz.ll", "popc.ll", "h2f", true)
.Cases("max.i", "max.ll", "max.ui", "max.ull", true)
.Cases("min.i", "min.ll", "min.ui", "min.ull", true)
.Default(false);
if (Expand) {
NewFn = nullptr;
return true;
}
}
}
case 'o':
// We only need to change the name to match the mangling including the
// address space.
if (F->arg_size() == 2 && Name.startswith("objectsize.")) {
Type *Tys[2] = { F->getReturnType(), F->arg_begin()->getType() };
if (F->getName() != Intrinsic::getName(Intrinsic::objectsize, Tys)) {
rename(F);
NewFn = Intrinsic::getDeclaration(F->getParent(),
Intrinsic::objectsize, Tys);
return true;
}
}
break;
case 's':
if (Name == "stackprotectorcheck") {
NewFn = nullptr;
return true;
}
break;
case 'x':
if (UpgradeX86IntrinsicFunction(F, Name, NewFn))
return true;
}
// Remangle our intrinsic since we upgrade the mangling
auto Result = llvm::Intrinsic::remangleIntrinsicFunction(F);
if (Result != None) {
NewFn = Result.getValue();
return true;
}
// 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 = nullptr;
bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
assert(F != NewFn && "Intrinsic function upgraded to the same function");
// Upgrade intrinsic attributes. This does not change the function.
if (NewFn)
F = NewFn;
if (Intrinsic::ID id = F->getIntrinsicID())
F->setAttributes(Intrinsic::getAttributes(F->getContext(), id));
return Upgraded;
}
bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
// Nothing to do yet.
return false;
}
// Handles upgrading SSE2/AVX2/AVX512BW PSLLDQ intrinsics by converting them
// to byte shuffles.
static Value *UpgradeX86PSLLDQIntrinsics(IRBuilder<> &Builder,
Value *Op, unsigned Shift) {
Type *ResultTy = Op->getType();
unsigned NumElts = ResultTy->getVectorNumElements() * 8;
// Bitcast from a 64-bit element type to a byte element type.
Type *VecTy = VectorType::get(Builder.getInt8Ty(), NumElts);
Op = Builder.CreateBitCast(Op, VecTy, "cast");
// We'll be shuffling in zeroes.
Value *Res = Constant::getNullValue(VecTy);
// If shift is less than 16, emit a shuffle to move the bytes. Otherwise,
// we'll just return the zero vector.
if (Shift < 16) {
uint32_t Idxs[64];
// 256/512-bit version is split into 2/4 16-byte lanes.
for (unsigned l = 0; l != NumElts; l += 16)
for (unsigned i = 0; i != 16; ++i) {
unsigned Idx = NumElts + i - Shift;
if (Idx < NumElts)
Idx -= NumElts - 16; // end of lane, switch operand.
Idxs[l + i] = Idx + l;
}
Res = Builder.CreateShuffleVector(Res, Op, makeArrayRef(Idxs, NumElts));
}
// Bitcast back to a 64-bit element type.
return Builder.CreateBitCast(Res, ResultTy, "cast");
}
// Handles upgrading SSE2/AVX2/AVX512BW PSRLDQ intrinsics by converting them
// to byte shuffles.
static Value *UpgradeX86PSRLDQIntrinsics(IRBuilder<> &Builder, Value *Op,
unsigned Shift) {
Type *ResultTy = Op->getType();
unsigned NumElts = ResultTy->getVectorNumElements() * 8;
// Bitcast from a 64-bit element type to a byte element type.
Type *VecTy = VectorType::get(Builder.getInt8Ty(), NumElts);
Op = Builder.CreateBitCast(Op, VecTy, "cast");
// We'll be shuffling in zeroes.
Value *Res = Constant::getNullValue(VecTy);
// If shift is less than 16, emit a shuffle to move the bytes. Otherwise,
// we'll just return the zero vector.
if (Shift < 16) {
uint32_t Idxs[64];
// 256/512-bit version is split into 2/4 16-byte lanes.
for (unsigned l = 0; l != NumElts; l += 16)
for (unsigned i = 0; i != 16; ++i) {
unsigned Idx = i + Shift;
if (Idx >= 16)
Idx += NumElts - 16; // end of lane, switch operand.
Idxs[l + i] = Idx + l;
}
Res = Builder.CreateShuffleVector(Op, Res, makeArrayRef(Idxs, NumElts));
}
// Bitcast back to a 64-bit element type.
return Builder.CreateBitCast(Res, ResultTy, "cast");
}
static Value *getX86MaskVec(IRBuilder<> &Builder, Value *Mask,
unsigned NumElts) {
llvm::VectorType *MaskTy = llvm::VectorType::get(Builder.getInt1Ty(),
cast<IntegerType>(Mask->getType())->getBitWidth());
Mask = Builder.CreateBitCast(Mask, MaskTy);
// If we have less than 8 elements, then the starting mask was an i8 and
// we need to extract down to the right number of elements.
if (NumElts < 8) {
uint32_t Indices[4];
for (unsigned i = 0; i != NumElts; ++i)
Indices[i] = i;
Mask = Builder.CreateShuffleVector(Mask, Mask,
makeArrayRef(Indices, NumElts),
"extract");
}
return Mask;
}
static Value *EmitX86Select(IRBuilder<> &Builder, Value *Mask,
Value *Op0, Value *Op1) {
// If the mask is all ones just emit the align operation.
if (const auto *C = dyn_cast<Constant>(Mask))
if (C->isAllOnesValue())
return Op0;
Mask = getX86MaskVec(Builder, Mask, Op0->getType()->getVectorNumElements());
return Builder.CreateSelect(Mask, Op0, Op1);
}
// Handle autoupgrade for masked PALIGNR and VALIGND/Q intrinsics.
// PALIGNR handles large immediates by shifting while VALIGN masks the immediate
// so we need to handle both cases. VALIGN also doesn't have 128-bit lanes.
static Value *UpgradeX86ALIGNIntrinsics(IRBuilder<> &Builder, Value *Op0,
Value *Op1, Value *Shift,
Value *Passthru, Value *Mask,
bool IsVALIGN) {
unsigned ShiftVal = cast<llvm::ConstantInt>(Shift)->getZExtValue();
unsigned NumElts = Op0->getType()->getVectorNumElements();
assert((IsVALIGN || NumElts % 16 == 0) && "Illegal NumElts for PALIGNR!");
assert((!IsVALIGN || NumElts <= 16) && "NumElts too large for VALIGN!");
assert(isPowerOf2_32(NumElts) && "NumElts not a power of 2!");
// Mask the immediate for VALIGN.
if (IsVALIGN)
ShiftVal &= (NumElts - 1);
// If palignr is shifting the pair of vectors more than the size of two
// lanes, emit zero.
if (ShiftVal >= 32)
return llvm::Constant::getNullValue(Op0->getType());
// If palignr is shifting the pair of input vectors more than one lane,
// but less than two lanes, convert to shifting in zeroes.
if (ShiftVal > 16) {
ShiftVal -= 16;
Op1 = Op0;
Op0 = llvm::Constant::getNullValue(Op0->getType());
}
uint32_t Indices[64];
// 256-bit palignr operates on 128-bit lanes so we need to handle that
for (unsigned l = 0; l < NumElts; l += 16) {
for (unsigned i = 0; i != 16; ++i) {
unsigned Idx = ShiftVal + i;
if (!IsVALIGN && Idx >= 16) // Disable wrap for VALIGN.
Idx += NumElts - 16; // End of lane, switch operand.
Indices[l + i] = Idx + l;
}
}
Value *Align = Builder.CreateShuffleVector(Op1, Op0,
makeArrayRef(Indices, NumElts),
"palignr");
return EmitX86Select(Builder, Mask, Align, Passthru);
}
static Value *UpgradeMaskedStore(IRBuilder<> &Builder,
Value *Ptr, Value *Data, Value *Mask,
bool Aligned) {
// Cast the pointer to the right type.
Ptr = Builder.CreateBitCast(Ptr,
llvm::PointerType::getUnqual(Data->getType()));
unsigned Align =
Aligned ? cast<VectorType>(Data->getType())->getBitWidth() / 8 : 1;
// If the mask is all ones just emit a regular store.
if (const auto *C = dyn_cast<Constant>(Mask))
if (C->isAllOnesValue())
return Builder.CreateAlignedStore(Data, Ptr, Align);
// Convert the mask from an integer type to a vector of i1.
unsigned NumElts = Data->getType()->getVectorNumElements();
Mask = getX86MaskVec(Builder, Mask, NumElts);
return Builder.CreateMaskedStore(Data, Ptr, Align, Mask);
}
static Value *UpgradeMaskedLoad(IRBuilder<> &Builder,
Value *Ptr, Value *Passthru, Value *Mask,
bool Aligned) {
// Cast the pointer to the right type.
Ptr = Builder.CreateBitCast(Ptr,
llvm::PointerType::getUnqual(Passthru->getType()));
unsigned Align =
Aligned ? cast<VectorType>(Passthru->getType())->getBitWidth() / 8 : 1;
// If the mask is all ones just emit a regular store.
if (const auto *C = dyn_cast<Constant>(Mask))
if (C->isAllOnesValue())
return Builder.CreateAlignedLoad(Ptr, Align);
// Convert the mask from an integer type to a vector of i1.
unsigned NumElts = Passthru->getType()->getVectorNumElements();
Mask = getX86MaskVec(Builder, Mask, NumElts);
return Builder.CreateMaskedLoad(Ptr, Align, Mask, Passthru);
}
static Value *upgradeIntMinMax(IRBuilder<> &Builder, CallInst &CI,
ICmpInst::Predicate Pred) {
Value *Op0 = CI.getArgOperand(0);
Value *Op1 = CI.getArgOperand(1);
Value *Cmp = Builder.CreateICmp(Pred, Op0, Op1);
Value *Res = Builder.CreateSelect(Cmp, Op0, Op1);
if (CI.getNumArgOperands() == 4)
Res = EmitX86Select(Builder, CI.getArgOperand(3), Res, CI.getArgOperand(2));
return Res;
}
static Value *upgradeMaskedCompare(IRBuilder<> &Builder, CallInst &CI,
ICmpInst::Predicate Pred) {
Value *Op0 = CI.getArgOperand(0);
unsigned NumElts = Op0->getType()->getVectorNumElements();
Value *Cmp = Builder.CreateICmp(Pred, Op0, CI.getArgOperand(1));
Value *Mask = CI.getArgOperand(2);
const auto *C = dyn_cast<Constant>(Mask);
if (!C || !C->isAllOnesValue())
Cmp = Builder.CreateAnd(Cmp, getX86MaskVec(Builder, Mask, NumElts));
if (NumElts < 8) {
uint32_t Indices[8];
for (unsigned i = 0; i != NumElts; ++i)
Indices[i] = i;
for (unsigned i = NumElts; i != 8; ++i)
Indices[i] = NumElts + i % NumElts;
Cmp = Builder.CreateShuffleVector(Cmp,
Constant::getNullValue(Cmp->getType()),
Indices);
}
return Builder.CreateBitCast(Cmp, IntegerType::get(CI.getContext(),
std::max(NumElts, 8U)));
}
// Replace a masked intrinsic with an older unmasked intrinsic.
static Value *UpgradeX86MaskedShift(IRBuilder<> &Builder, CallInst &CI,
Intrinsic::ID IID) {
Function *F = CI.getCalledFunction();
Function *Intrin = Intrinsic::getDeclaration(F->getParent(), IID);
Value *Rep = Builder.CreateCall(Intrin,
{ CI.getArgOperand(0), CI.getArgOperand(1) });
return EmitX86Select(Builder, CI.getArgOperand(3), Rep, CI.getArgOperand(2));
}
static Value* upgradeMaskedMove(IRBuilder<> &Builder, CallInst &CI) {
Value* A = CI.getArgOperand(0);
Value* B = CI.getArgOperand(1);
Value* Src = CI.getArgOperand(2);
Value* Mask = CI.getArgOperand(3);
Value* AndNode = Builder.CreateAnd(Mask, APInt(8, 1));
Value* Cmp = Builder.CreateIsNotNull(AndNode);
Value* Extract1 = Builder.CreateExtractElement(B, (uint64_t)0);
Value* Extract2 = Builder.CreateExtractElement(Src, (uint64_t)0);
Value* Select = Builder.CreateSelect(Cmp, Extract1, Extract2);
return Builder.CreateInsertElement(A, Select, (uint64_t)0);
}
/// Upgrade a call to an old intrinsic. All argument and return casting must be
/// provided 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->getIterator());
assert(F && "Intrinsic call is not direct?");
if (!NewFn) {
// Get the Function's name.
StringRef Name = F->getName();
assert(Name.startswith("llvm.") && "Intrinsic doesn't start with 'llvm.'");
Name = Name.substr(5);
bool IsX86 = Name.startswith("x86.");
if (IsX86)
Name = Name.substr(4);
bool IsNVVM = Name.startswith("nvvm.");
if (IsNVVM)
Name = Name.substr(5);
if (IsX86 && Name.startswith("sse4a.movnt.")) {
Module *M = F->getParent();
SmallVector<Metadata *, 1> Elts;
Elts.push_back(
ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(C), 1)));
MDNode *Node = MDNode::get(C, Elts);
Value *Arg0 = CI->getArgOperand(0);
Value *Arg1 = CI->getArgOperand(1);
// Nontemporal (unaligned) store of the 0'th element of the float/double
// vector.
Type *SrcEltTy = cast<VectorType>(Arg1->getType())->getElementType();
PointerType *EltPtrTy = PointerType::getUnqual(SrcEltTy);
Value *Addr = Builder.CreateBitCast(Arg0, EltPtrTy, "cast");
Value *Extract =
Builder.CreateExtractElement(Arg1, (uint64_t)0, "extractelement");
StoreInst *SI = Builder.CreateAlignedStore(Extract, Addr, 1);
SI->setMetadata(M->getMDKindID("nontemporal"), Node);
// Remove intrinsic.
CI->eraseFromParent();
return;
}
if (IsX86 && (Name.startswith("avx.movnt.") ||
Name.startswith("avx512.storent."))) {
Module *M = F->getParent();
SmallVector<Metadata *, 1> Elts;
Elts.push_back(
ConstantAsMetadata::get(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");
VectorType *VTy = cast<VectorType>(Arg1->getType());
StoreInst *SI = Builder.CreateAlignedStore(Arg1, BC,
VTy->getBitWidth() / 8);
SI->setMetadata(M->getMDKindID("nontemporal"), Node);
// Remove intrinsic.
CI->eraseFromParent();
return;
}
if (IsX86 && Name == "sse2.storel.dq") {
Value *Arg0 = CI->getArgOperand(0);
Value *Arg1 = CI->getArgOperand(1);
Type *NewVecTy = VectorType::get(Type::getInt64Ty(C), 2);
Value *BC0 = Builder.CreateBitCast(Arg1, NewVecTy, "cast");
Value *Elt = Builder.CreateExtractElement(BC0, (uint64_t)0);
Value *BC = Builder.CreateBitCast(Arg0,
PointerType::getUnqual(Elt->getType()),
"cast");
Builder.CreateAlignedStore(Elt, BC, 1);
// Remove intrinsic.
CI->eraseFromParent();
return;
}
if (IsX86 && (Name.startswith("sse.storeu.") ||
Name.startswith("sse2.storeu.") ||
Name.startswith("avx.storeu."))) {
Value *Arg0 = CI->getArgOperand(0);
Value *Arg1 = CI->getArgOperand(1);
Arg0 = Builder.CreateBitCast(Arg0,
PointerType::getUnqual(Arg1->getType()),
"cast");
Builder.CreateAlignedStore(Arg1, Arg0, 1);
// Remove intrinsic.
CI->eraseFromParent();
return;
}
if (IsX86 && (Name.startswith("avx512.mask.store"))) {
// "avx512.mask.storeu." or "avx512.mask.store."
bool Aligned = Name[17] != 'u'; // "avx512.mask.storeu".
UpgradeMaskedStore(Builder, CI->getArgOperand(0), CI->getArgOperand(1),
CI->getArgOperand(2), Aligned);
// Remove intrinsic.
CI->eraseFromParent();
return;
}
Value *Rep;
// Upgrade packed integer vector compare intrinsics to compare instructions.
if (IsX86 && (Name.startswith("sse2.pcmp") ||
Name.startswith("avx2.pcmp"))) {
// "sse2.pcpmpeq." "sse2.pcmpgt." "avx2.pcmpeq." or "avx2.pcmpgt."
bool CmpEq = Name[9] == 'e';
Rep = Builder.CreateICmp(CmpEq ? ICmpInst::ICMP_EQ : ICmpInst::ICMP_SGT,
CI->getArgOperand(0), CI->getArgOperand(1));
Rep = Builder.CreateSExt(Rep, CI->getType(), "");
} else if (IsX86 && (Name == "sse.add.ss" || Name == "sse2.add.sd")) {
Type *I32Ty = Type::getInt32Ty(C);
Value *Elt0 = Builder.CreateExtractElement(CI->getArgOperand(0),
ConstantInt::get(I32Ty, 0));
Value *Elt1 = Builder.CreateExtractElement(CI->getArgOperand(1),
ConstantInt::get(I32Ty, 0));
Rep = Builder.CreateInsertElement(CI->getArgOperand(0),
Builder.CreateFAdd(Elt0, Elt1),
ConstantInt::get(I32Ty, 0));
} else if (IsX86 && (Name == "sse.sub.ss" || Name == "sse2.sub.sd")) {
Type *I32Ty = Type::getInt32Ty(C);
Value *Elt0 = Builder.CreateExtractElement(CI->getArgOperand(0),
ConstantInt::get(I32Ty, 0));
Value *Elt1 = Builder.CreateExtractElement(CI->getArgOperand(1),
ConstantInt::get(I32Ty, 0));
Rep = Builder.CreateInsertElement(CI->getArgOperand(0),
Builder.CreateFSub(Elt0, Elt1),
ConstantInt::get(I32Ty, 0));
} else if (IsX86 && (Name == "sse.mul.ss" || Name == "sse2.mul.sd")) {
Type *I32Ty = Type::getInt32Ty(C);
Value *Elt0 = Builder.CreateExtractElement(CI->getArgOperand(0),
ConstantInt::get(I32Ty, 0));
Value *Elt1 = Builder.CreateExtractElement(CI->getArgOperand(1),
ConstantInt::get(I32Ty, 0));
Rep = Builder.CreateInsertElement(CI->getArgOperand(0),
Builder.CreateFMul(Elt0, Elt1),
ConstantInt::get(I32Ty, 0));
} else if (IsX86 && (Name == "sse.div.ss" || Name == "sse2.div.sd")) {
Type *I32Ty = Type::getInt32Ty(C);
Value *Elt0 = Builder.CreateExtractElement(CI->getArgOperand(0),
ConstantInt::get(I32Ty, 0));
Value *Elt1 = Builder.CreateExtractElement(CI->getArgOperand(1),
ConstantInt::get(I32Ty, 0));
Rep = Builder.CreateInsertElement(CI->getArgOperand(0),
Builder.CreateFDiv(Elt0, Elt1),
ConstantInt::get(I32Ty, 0));
} else if (IsX86 && Name.startswith("avx512.mask.pcmp")) {
// "avx512.mask.pcmpeq." or "avx512.mask.pcmpgt."
bool CmpEq = Name[16] == 'e';
Rep = upgradeMaskedCompare(Builder, *CI,
CmpEq ? ICmpInst::ICMP_EQ
: ICmpInst::ICMP_SGT);
} else if (IsX86 && (Name == "sse41.pmaxsb" ||
Name == "sse2.pmaxs.w" ||
Name == "sse41.pmaxsd" ||
Name.startswith("avx2.pmaxs") ||
Name.startswith("avx512.mask.pmaxs"))) {
Rep = upgradeIntMinMax(Builder, *CI, ICmpInst::ICMP_SGT);
} else if (IsX86 && (Name == "sse2.pmaxu.b" ||
Name == "sse41.pmaxuw" ||
Name == "sse41.pmaxud" ||
Name.startswith("avx2.pmaxu") ||
Name.startswith("avx512.mask.pmaxu"))) {
Rep = upgradeIntMinMax(Builder, *CI, ICmpInst::ICMP_UGT);
} else if (IsX86 && (Name == "sse41.pminsb" ||
Name == "sse2.pmins.w" ||
Name == "sse41.pminsd" ||
Name.startswith("avx2.pmins") ||
Name.startswith("avx512.mask.pmins"))) {
Rep = upgradeIntMinMax(Builder, *CI, ICmpInst::ICMP_SLT);
} else if (IsX86 && (Name == "sse2.pminu.b" ||
Name == "sse41.pminuw" ||
Name == "sse41.pminud" ||
Name.startswith("avx2.pminu") ||
Name.startswith("avx512.mask.pminu"))) {
Rep = upgradeIntMinMax(Builder, *CI, ICmpInst::ICMP_ULT);
} else if (IsX86 && (Name == "sse2.cvtdq2pd" ||
Name == "sse2.cvtps2pd" ||
Name == "avx.cvtdq2.pd.256" ||
Name == "avx.cvt.ps2.pd.256" ||
Name.startswith("avx512.mask.cvtdq2pd.") ||