mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-29 13:29:28 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74973 91177308-0d34-0410-b5e6-96231b3b80d8
438 lines
17 KiB
C++
438 lines
17 KiB
C++
//===-- 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/LLVMContext.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Instructions.h"
|
|
#include "llvm/Intrinsics.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include <cstring>
|
|
using namespace llvm;
|
|
|
|
|
|
static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
|
|
assert(F && "Illegal to upgrade a non-existent Function.");
|
|
|
|
LLVMContext* Context = F->getContext();
|
|
|
|
// Get the Function's name.
|
|
const std::string& Name = F->getName();
|
|
|
|
// Convenience
|
|
const FunctionType *FTy = F->getFunctionType();
|
|
|
|
// Quickly eliminate it, if it's not a candidate.
|
|
if (Name.length() <= 8 || Name[0] != 'l' || Name[1] != 'l' ||
|
|
Name[2] != 'v' || Name[3] != 'm' || Name[4] != '.')
|
|
return false;
|
|
|
|
Module *M = F->getParent();
|
|
switch (Name[5]) {
|
|
default: break;
|
|
case 'a':
|
|
// This upgrades the llvm.atomic.lcs, llvm.atomic.las, llvm.atomic.lss,
|
|
// and atomics with default address spaces to their new names to their new
|
|
// function name (e.g. llvm.atomic.add.i32 => llvm.atomic.add.i32.p0i32)
|
|
if (Name.compare(5,7,"atomic.",7) == 0) {
|
|
if (Name.compare(12,3,"lcs",3) == 0) {
|
|
std::string::size_type delim = Name.find('.',12);
|
|
F->setName("llvm.atomic.cmp.swap" + Name.substr(delim) +
|
|
".p0" + Name.substr(delim+1));
|
|
NewFn = F;
|
|
return true;
|
|
}
|
|
else if (Name.compare(12,3,"las",3) == 0) {
|
|
std::string::size_type delim = Name.find('.',12);
|
|
F->setName("llvm.atomic.load.add"+Name.substr(delim)
|
|
+ ".p0" + Name.substr(delim+1));
|
|
NewFn = F;
|
|
return true;
|
|
}
|
|
else if (Name.compare(12,3,"lss",3) == 0) {
|
|
std::string::size_type delim = Name.find('.',12);
|
|
F->setName("llvm.atomic.load.sub"+Name.substr(delim)
|
|
+ ".p0" + Name.substr(delim+1));
|
|
NewFn = F;
|
|
return true;
|
|
}
|
|
else if (Name.rfind(".p") == std::string::npos) {
|
|
// We don't have an address space qualifier so this has be upgraded
|
|
// to the new name. Copy the type name at the end of the intrinsic
|
|
// and add to it
|
|
std::string::size_type delim = Name.find_last_of('.');
|
|
assert(delim != std::string::npos && "can not find type");
|
|
F->setName(Name + ".p0" + Name.substr(delim+1));
|
|
NewFn = F;
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
case 'b':
|
|
// This upgrades the name of the llvm.bswap intrinsic function to only use
|
|
// a single type name for overloading. We only care about the old format
|
|
// 'llvm.bswap.i*.i*', so check for 'bswap.' and then for there being
|
|
// a '.' after 'bswap.'
|
|
if (Name.compare(5,6,"bswap.",6) == 0) {
|
|
std::string::size_type delim = Name.find('.',11);
|
|
|
|
if (delim != std::string::npos) {
|
|
// Construct the new name as 'llvm.bswap' + '.i*'
|
|
F->setName(Name.substr(0,10)+Name.substr(delim));
|
|
NewFn = F;
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'c':
|
|
// We only want to fix the 'llvm.ct*' intrinsics which do not have the
|
|
// correct return type, so we check for the name, and then check if the
|
|
// return type does not match the parameter type.
|
|
if ( (Name.compare(5,5,"ctpop",5) == 0 ||
|
|
Name.compare(5,4,"ctlz",4) == 0 ||
|
|
Name.compare(5,4,"cttz",4) == 0) &&
|
|
FTy->getReturnType() != FTy->getParamType(0)) {
|
|
// We first need to change the name of the old (bad) intrinsic, because
|
|
// its type is incorrect, but we cannot overload that name. We
|
|
// arbitrarily unique it here allowing us to construct a correctly named
|
|
// and typed function below.
|
|
F->setName("");
|
|
|
|
// Now construct the new intrinsic with the correct name and type. We
|
|
// leave the old function around in order to query its type, whatever it
|
|
// may be, and correctly convert up to the new type.
|
|
NewFn = cast<Function>(M->getOrInsertFunction(Name,
|
|
FTy->getParamType(0),
|
|
FTy->getParamType(0),
|
|
(Type *)0));
|
|
return true;
|
|
}
|
|
break;
|
|
|
|
case 'p':
|
|
// This upgrades the llvm.part.select overloaded intrinsic names to only
|
|
// use one type specifier in the name. We only care about the old format
|
|
// 'llvm.part.select.i*.i*', and solve as above with bswap.
|
|
if (Name.compare(5,12,"part.select.",12) == 0) {
|
|
std::string::size_type delim = Name.find('.',17);
|
|
|
|
if (delim != std::string::npos) {
|
|
// Construct a new name as 'llvm.part.select' + '.i*'
|
|
F->setName(Name.substr(0,16)+Name.substr(delim));
|
|
NewFn = F;
|
|
return true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// This upgrades the llvm.part.set intrinsics similarly as above, however
|
|
// we care about 'llvm.part.set.i*.i*.i*', but only the first two types
|
|
// must match. There is an additional type specifier after these two
|
|
// matching types that we must retain when upgrading. Thus, we require
|
|
// finding 2 periods, not just one, after the intrinsic name.
|
|
if (Name.compare(5,9,"part.set.",9) == 0) {
|
|
std::string::size_type delim = Name.find('.',14);
|
|
|
|
if (delim != std::string::npos &&
|
|
Name.find('.',delim+1) != std::string::npos) {
|
|
// Construct a new name as 'llvm.part.select' + '.i*.i*'
|
|
F->setName(Name.substr(0,13)+Name.substr(delim));
|
|
NewFn = F;
|
|
return true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
break;
|
|
case 'x':
|
|
// This fixes all MMX shift intrinsic instructions to take a
|
|
// v1i64 instead of a v2i32 as the second parameter.
|
|
if (Name.compare(5,10,"x86.mmx.ps",10) == 0 &&
|
|
(Name.compare(13,4,"psll", 4) == 0 ||
|
|
Name.compare(13,4,"psra", 4) == 0 ||
|
|
Name.compare(13,4,"psrl", 4) == 0) && Name[17] != 'i') {
|
|
|
|
const llvm::Type *VT =
|
|
Context->getVectorType(Context->getIntegerType(64), 1);
|
|
|
|
// We don't have to do anything if the parameter already has
|
|
// the correct type.
|
|
if (FTy->getParamType(1) == VT)
|
|
break;
|
|
|
|
// We first need to change the name of the old (bad) intrinsic, because
|
|
// its type is incorrect, but we cannot overload that name. We
|
|
// arbitrarily unique it here allowing us to construct a correctly named
|
|
// and typed function below.
|
|
F->setName("");
|
|
|
|
assert(FTy->getNumParams() == 2 && "MMX shift intrinsics take 2 args!");
|
|
|
|
// Now construct the new intrinsic with the correct name and type. We
|
|
// leave the old function around in order to query its type, whatever it
|
|
// may be, and correctly convert up to the new type.
|
|
NewFn = cast<Function>(M->getOrInsertFunction(Name,
|
|
FTy->getReturnType(),
|
|
FTy->getParamType(0),
|
|
VT,
|
|
(Type *)0));
|
|
return true;
|
|
} else if (Name.compare(5,17,"x86.sse2.loadh.pd",17) == 0 ||
|
|
Name.compare(5,17,"x86.sse2.loadl.pd",17) == 0 ||
|
|
Name.compare(5,16,"x86.sse2.movl.dq",16) == 0 ||
|
|
Name.compare(5,15,"x86.sse2.movs.d",15) == 0 ||
|
|
Name.compare(5,16,"x86.sse2.shuf.pd",16) == 0 ||
|
|
Name.compare(5,18,"x86.sse2.unpckh.pd",18) == 0 ||
|
|
Name.compare(5,18,"x86.sse2.unpckl.pd",18) == 0 ||
|
|
Name.compare(5,20,"x86.sse2.punpckh.qdq",20) == 0 ||
|
|
Name.compare(5,20,"x86.sse2.punpckl.qdq",20) == 0) {
|
|
// Calls to these intrinsics are transformed into ShuffleVector's.
|
|
NewFn = 0;
|
|
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((Intrinsic::ID)id));
|
|
return Upgraded;
|
|
}
|
|
|
|
// 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* Context = F->getContext();
|
|
|
|
assert(F && "CallInst has no function associated with it.");
|
|
|
|
if (!NewFn) {
|
|
bool isLoadH = false, isLoadL = false, isMovL = false;
|
|
bool isMovSD = false, isShufPD = false;
|
|
bool isUnpckhPD = false, isUnpcklPD = false;
|
|
bool isPunpckhQPD = false, isPunpcklQPD = false;
|
|
if (strcmp(F->getNameStart(), "llvm.x86.sse2.loadh.pd") == 0)
|
|
isLoadH = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.loadl.pd") == 0)
|
|
isLoadL = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.movl.dq") == 0)
|
|
isMovL = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.movs.d") == 0)
|
|
isMovSD = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.shuf.pd") == 0)
|
|
isShufPD = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.unpckh.pd") == 0)
|
|
isUnpckhPD = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.unpckl.pd") == 0)
|
|
isUnpcklPD = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.punpckh.qdq") == 0)
|
|
isPunpckhQPD = true;
|
|
else if (strcmp(F->getNameStart(), "llvm.x86.sse2.punpckl.qdq") == 0)
|
|
isPunpcklQPD = true;
|
|
|
|
if (isLoadH || isLoadL || isMovL || isMovSD || isShufPD ||
|
|
isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
|
|
std::vector<Constant*> Idxs;
|
|
Value *Op0 = CI->getOperand(1);
|
|
ShuffleVectorInst *SI = NULL;
|
|
if (isLoadH || isLoadL) {
|
|
Value *Op1 = Context->getUndef(Op0->getType());
|
|
Value *Addr = new BitCastInst(CI->getOperand(2),
|
|
Context->getPointerTypeUnqual(Type::DoubleTy),
|
|
"upgraded.", CI);
|
|
Value *Load = new LoadInst(Addr, "upgraded.", false, 8, CI);
|
|
Value *Idx = Context->getConstantInt(Type::Int32Ty, 0);
|
|
Op1 = InsertElementInst::Create(Op1, Load, Idx, "upgraded.", CI);
|
|
|
|
if (isLoadH) {
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 0));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
|
|
} else {
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 1));
|
|
}
|
|
Value *Mask = Context->getConstantVector(Idxs);
|
|
SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
|
|
} else if (isMovL) {
|
|
Constant *Zero = Context->getConstantInt(Type::Int32Ty, 0);
|
|
Idxs.push_back(Zero);
|
|
Idxs.push_back(Zero);
|
|
Idxs.push_back(Zero);
|
|
Idxs.push_back(Zero);
|
|
Value *ZeroV = Context->getConstantVector(Idxs);
|
|
|
|
Idxs.clear();
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 4));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 5));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 3));
|
|
Value *Mask = Context->getConstantVector(Idxs);
|
|
SI = new ShuffleVectorInst(ZeroV, Op0, Mask, "upgraded.", CI);
|
|
} else if (isMovSD ||
|
|
isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
|
|
Value *Op1 = CI->getOperand(2);
|
|
if (isMovSD) {
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 1));
|
|
} else if (isUnpckhPD || isPunpckhQPD) {
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 1));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 3));
|
|
} else {
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 0));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
|
|
}
|
|
Value *Mask = Context->getConstantVector(Idxs);
|
|
SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
|
|
} else if (isShufPD) {
|
|
Value *Op1 = CI->getOperand(2);
|
|
unsigned MaskVal = cast<ConstantInt>(CI->getOperand(3))->getZExtValue();
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty, MaskVal & 1));
|
|
Idxs.push_back(Context->getConstantInt(Type::Int32Ty,
|
|
((MaskVal >> 1) & 1)+2));
|
|
Value *Mask = Context->getConstantVector(Idxs);
|
|
SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
|
|
}
|
|
|
|
assert(SI && "Unexpected!");
|
|
|
|
// Handle any uses of the old CallInst.
|
|
if (!CI->use_empty())
|
|
// Replace all uses of the old call with the new cast which has the
|
|
// correct type.
|
|
CI->replaceAllUsesWith(SI);
|
|
|
|
// Clean up the old call now that it has been completely upgraded.
|
|
CI->eraseFromParent();
|
|
} else {
|
|
assert(0 && "Unknown function for CallInst upgrade.");
|
|
}
|
|
return;
|
|
}
|
|
|
|
switch (NewFn->getIntrinsicID()) {
|
|
default: assert(0 && "Unknown function for CallInst upgrade.");
|
|
case Intrinsic::x86_mmx_psll_d:
|
|
case Intrinsic::x86_mmx_psll_q:
|
|
case Intrinsic::x86_mmx_psll_w:
|
|
case Intrinsic::x86_mmx_psra_d:
|
|
case Intrinsic::x86_mmx_psra_w:
|
|
case Intrinsic::x86_mmx_psrl_d:
|
|
case Intrinsic::x86_mmx_psrl_q:
|
|
case Intrinsic::x86_mmx_psrl_w: {
|
|
Value *Operands[2];
|
|
|
|
Operands[0] = CI->getOperand(1);
|
|
|
|
// Cast the second parameter to the correct type.
|
|
BitCastInst *BC = new BitCastInst(CI->getOperand(2),
|
|
NewFn->getFunctionType()->getParamType(1),
|
|
"upgraded.", CI);
|
|
Operands[1] = BC;
|
|
|
|
// Construct a new CallInst
|
|
CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+2,
|
|
"upgraded."+CI->getName(), CI);
|
|
NewCI->setTailCall(CI->isTailCall());
|
|
NewCI->setCallingConv(CI->getCallingConv());
|
|
|
|
// Handle any uses of the old CallInst.
|
|
if (!CI->use_empty())
|
|
// Replace all uses of the old call with the new cast which has the
|
|
// correct type.
|
|
CI->replaceAllUsesWith(NewCI);
|
|
|
|
// Clean up the old call now that it has been completely upgraded.
|
|
CI->eraseFromParent();
|
|
break;
|
|
}
|
|
case Intrinsic::ctlz:
|
|
case Intrinsic::ctpop:
|
|
case Intrinsic::cttz: {
|
|
// Build a small vector of the 1..(N-1) operands, which are the
|
|
// parameters.
|
|
SmallVector<Value*, 8> Operands(CI->op_begin()+1, CI->op_end());
|
|
|
|
// Construct a new CallInst
|
|
CallInst *NewCI = CallInst::Create(NewFn, Operands.begin(), Operands.end(),
|
|
"upgraded."+CI->getName(), CI);
|
|
NewCI->setTailCall(CI->isTailCall());
|
|
NewCI->setCallingConv(CI->getCallingConv());
|
|
|
|
// Handle any uses of the old CallInst.
|
|
if (!CI->use_empty()) {
|
|
// Check for sign extend parameter attributes on the return values.
|
|
bool SrcSExt = NewFn->getAttributes().paramHasAttr(0, Attribute::SExt);
|
|
bool DestSExt = F->getAttributes().paramHasAttr(0, Attribute::SExt);
|
|
|
|
// Construct an appropriate cast from the new return type to the old.
|
|
CastInst *RetCast = CastInst::Create(
|
|
CastInst::getCastOpcode(NewCI, SrcSExt,
|
|
F->getReturnType(),
|
|
DestSExt),
|
|
NewCI, F->getReturnType(),
|
|
NewCI->getName(), CI);
|
|
NewCI->moveBefore(RetCast);
|
|
|
|
// Replace all uses of the old call with the new cast which has the
|
|
// correct type.
|
|
CI->replaceAllUsesWith(RetCast);
|
|
}
|
|
|
|
// Clean up the old call now that it has been completely upgraded.
|
|
CI->eraseFromParent();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// 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();
|
|
}
|
|
}
|
|
}
|