mirror of
https://github.com/c64scene-ar/llvm-6502.git
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e754d3fb85
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100199 91177308-0d34-0410-b5e6-96231b3b80d8
551 lines
21 KiB
C++
551 lines
21 KiB
C++
//===-- AutoUpgrade.cpp - Implement auto-upgrade helper functions ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the auto-upgrade helper functions
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/AutoUpgrade.h"
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#include "llvm/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <cstring>
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using namespace llvm;
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static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
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assert(F && "Illegal to upgrade a non-existent Function.");
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// Get the Function's name.
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const std::string& Name = F->getName();
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// Convenience
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const FunctionType *FTy = F->getFunctionType();
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// Quickly eliminate it, if it's not a candidate.
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if (Name.length() <= 8 || Name[0] != 'l' || Name[1] != 'l' ||
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Name[2] != 'v' || Name[3] != 'm' || Name[4] != '.')
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return false;
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Module *M = F->getParent();
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switch (Name[5]) {
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default: break;
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case 'a':
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// This upgrades the llvm.atomic.lcs, llvm.atomic.las, llvm.atomic.lss,
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// and atomics with default address spaces to their new names to their new
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// function name (e.g. llvm.atomic.add.i32 => llvm.atomic.add.i32.p0i32)
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if (Name.compare(5,7,"atomic.",7) == 0) {
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if (Name.compare(12,3,"lcs",3) == 0) {
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std::string::size_type delim = Name.find('.',12);
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F->setName("llvm.atomic.cmp.swap" + Name.substr(delim) +
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".p0" + Name.substr(delim+1));
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NewFn = F;
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return true;
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}
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else if (Name.compare(12,3,"las",3) == 0) {
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std::string::size_type delim = Name.find('.',12);
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F->setName("llvm.atomic.load.add"+Name.substr(delim)
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+ ".p0" + Name.substr(delim+1));
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NewFn = F;
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return true;
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}
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else if (Name.compare(12,3,"lss",3) == 0) {
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std::string::size_type delim = Name.find('.',12);
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F->setName("llvm.atomic.load.sub"+Name.substr(delim)
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+ ".p0" + Name.substr(delim+1));
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NewFn = F;
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return true;
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}
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else if (Name.rfind(".p") == std::string::npos) {
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// We don't have an address space qualifier so this has be upgraded
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// to the new name. Copy the type name at the end of the intrinsic
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// and add to it
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std::string::size_type delim = Name.find_last_of('.');
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assert(delim != std::string::npos && "can not find type");
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F->setName(Name + ".p0" + Name.substr(delim+1));
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NewFn = F;
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return true;
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}
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}
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break;
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case 'b':
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// This upgrades the name of the llvm.bswap intrinsic function to only use
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// a single type name for overloading. We only care about the old format
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// 'llvm.bswap.i*.i*', so check for 'bswap.' and then for there being
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// a '.' after 'bswap.'
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if (Name.compare(5,6,"bswap.",6) == 0) {
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std::string::size_type delim = Name.find('.',11);
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if (delim != std::string::npos) {
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// Construct the new name as 'llvm.bswap' + '.i*'
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F->setName(Name.substr(0,10)+Name.substr(delim));
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NewFn = F;
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return true;
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}
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}
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break;
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case 'c':
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// We only want to fix the 'llvm.ct*' intrinsics which do not have the
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// correct return type, so we check for the name, and then check if the
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// return type does not match the parameter type.
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if ( (Name.compare(5,5,"ctpop",5) == 0 ||
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Name.compare(5,4,"ctlz",4) == 0 ||
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Name.compare(5,4,"cttz",4) == 0) &&
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FTy->getReturnType() != FTy->getParamType(0)) {
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// We first need to change the name of the old (bad) intrinsic, because
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// its type is incorrect, but we cannot overload that name. We
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// arbitrarily unique it here allowing us to construct a correctly named
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// and typed function below.
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F->setName("");
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// Now construct the new intrinsic with the correct name and type. We
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// leave the old function around in order to query its type, whatever it
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// may be, and correctly convert up to the new type.
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NewFn = cast<Function>(M->getOrInsertFunction(Name,
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FTy->getParamType(0),
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FTy->getParamType(0),
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(Type *)0));
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return true;
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}
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break;
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case 'e':
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// The old llvm.eh.selector.i32 is equivalent to the new llvm.eh.selector.
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if (Name.compare("llvm.eh.selector.i32") == 0) {
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F->setName("llvm.eh.selector");
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NewFn = F;
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return true;
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}
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// The old llvm.eh.typeid.for.i32 is equivalent to llvm.eh.typeid.for.
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if (Name.compare("llvm.eh.typeid.for.i32") == 0) {
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F->setName("llvm.eh.typeid.for");
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NewFn = F;
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return true;
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}
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// Convert the old llvm.eh.selector.i64 to a call to llvm.eh.selector.
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if (Name.compare("llvm.eh.selector.i64") == 0) {
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NewFn = Intrinsic::getDeclaration(M, Intrinsic::eh_selector);
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return true;
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}
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// Convert the old llvm.eh.typeid.for.i64 to a call to llvm.eh.typeid.for.
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if (Name.compare("llvm.eh.typeid.for.i64") == 0) {
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NewFn = Intrinsic::getDeclaration(M, Intrinsic::eh_typeid_for);
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return true;
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}
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break;
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case 'p':
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// This upgrades the llvm.part.select overloaded intrinsic names to only
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// use one type specifier in the name. We only care about the old format
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// 'llvm.part.select.i*.i*', and solve as above with bswap.
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if (Name.compare(5,12,"part.select.",12) == 0) {
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std::string::size_type delim = Name.find('.',17);
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if (delim != std::string::npos) {
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// Construct a new name as 'llvm.part.select' + '.i*'
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F->setName(Name.substr(0,16)+Name.substr(delim));
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NewFn = F;
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return true;
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}
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break;
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}
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// This upgrades the llvm.part.set intrinsics similarly as above, however
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// we care about 'llvm.part.set.i*.i*.i*', but only the first two types
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// must match. There is an additional type specifier after these two
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// matching types that we must retain when upgrading. Thus, we require
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// finding 2 periods, not just one, after the intrinsic name.
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if (Name.compare(5,9,"part.set.",9) == 0) {
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std::string::size_type delim = Name.find('.',14);
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if (delim != std::string::npos &&
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Name.find('.',delim+1) != std::string::npos) {
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// Construct a new name as 'llvm.part.select' + '.i*.i*'
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F->setName(Name.substr(0,13)+Name.substr(delim));
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NewFn = F;
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return true;
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}
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break;
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}
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break;
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case 'x':
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// This fixes all MMX shift intrinsic instructions to take a
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// v1i64 instead of a v2i32 as the second parameter.
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if (Name.compare(5,10,"x86.mmx.ps",10) == 0 &&
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(Name.compare(13,4,"psll", 4) == 0 ||
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Name.compare(13,4,"psra", 4) == 0 ||
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Name.compare(13,4,"psrl", 4) == 0) && Name[17] != 'i') {
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const llvm::Type *VT =
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VectorType::get(IntegerType::get(FTy->getContext(), 64), 1);
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// We don't have to do anything if the parameter already has
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// the correct type.
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if (FTy->getParamType(1) == VT)
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break;
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// We first need to change the name of the old (bad) intrinsic, because
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// its type is incorrect, but we cannot overload that name. We
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// arbitrarily unique it here allowing us to construct a correctly named
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// and typed function below.
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F->setName("");
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assert(FTy->getNumParams() == 2 && "MMX shift intrinsics take 2 args!");
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// Now construct the new intrinsic with the correct name and type. We
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// leave the old function around in order to query its type, whatever it
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// may be, and correctly convert up to the new type.
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NewFn = cast<Function>(M->getOrInsertFunction(Name,
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FTy->getReturnType(),
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FTy->getParamType(0),
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VT,
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(Type *)0));
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return true;
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} else if (Name.compare(5,17,"x86.sse2.loadh.pd",17) == 0 ||
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Name.compare(5,17,"x86.sse2.loadl.pd",17) == 0 ||
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Name.compare(5,16,"x86.sse2.movl.dq",16) == 0 ||
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Name.compare(5,15,"x86.sse2.movs.d",15) == 0 ||
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Name.compare(5,16,"x86.sse2.shuf.pd",16) == 0 ||
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Name.compare(5,18,"x86.sse2.unpckh.pd",18) == 0 ||
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Name.compare(5,18,"x86.sse2.unpckl.pd",18) == 0 ||
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Name.compare(5,20,"x86.sse2.punpckh.qdq",20) == 0 ||
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Name.compare(5,20,"x86.sse2.punpckl.qdq",20) == 0) {
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// Calls to these intrinsics are transformed into ShuffleVector's.
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NewFn = 0;
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return true;
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} else if (Name.compare(5, 16, "x86.sse41.pmulld", 16) == 0) {
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// Calls to these intrinsics are transformed into vector multiplies.
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NewFn = 0;
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return true;
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}
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break;
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}
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// This may not belong here. This function is effectively being overloaded
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// to both detect an intrinsic which needs upgrading, and to provide the
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// upgraded form of the intrinsic. We should perhaps have two separate
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// functions for this.
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return false;
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}
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bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
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NewFn = 0;
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bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
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// Upgrade intrinsic attributes. This does not change the function.
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if (NewFn)
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F = NewFn;
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if (unsigned id = F->getIntrinsicID())
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F->setAttributes(Intrinsic::getAttributes((Intrinsic::ID)id));
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return Upgraded;
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}
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// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
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// upgraded intrinsic. All argument and return casting must be provided in
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// order to seamlessly integrate with existing context.
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void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
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Function *F = CI->getCalledFunction();
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LLVMContext &C = CI->getContext();
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assert(F && "CallInst has no function associated with it.");
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if (!NewFn) {
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bool isLoadH = false, isLoadL = false, isMovL = false;
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bool isMovSD = false, isShufPD = false;
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bool isUnpckhPD = false, isUnpcklPD = false;
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bool isPunpckhQPD = false, isPunpcklQPD = false;
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if (F->getName() == "llvm.x86.sse2.loadh.pd")
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isLoadH = true;
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else if (F->getName() == "llvm.x86.sse2.loadl.pd")
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isLoadL = true;
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else if (F->getName() == "llvm.x86.sse2.movl.dq")
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isMovL = true;
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else if (F->getName() == "llvm.x86.sse2.movs.d")
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isMovSD = true;
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else if (F->getName() == "llvm.x86.sse2.shuf.pd")
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isShufPD = true;
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else if (F->getName() == "llvm.x86.sse2.unpckh.pd")
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isUnpckhPD = true;
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else if (F->getName() == "llvm.x86.sse2.unpckl.pd")
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isUnpcklPD = true;
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else if (F->getName() == "llvm.x86.sse2.punpckh.qdq")
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isPunpckhQPD = true;
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else if (F->getName() == "llvm.x86.sse2.punpckl.qdq")
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isPunpcklQPD = true;
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if (isLoadH || isLoadL || isMovL || isMovSD || isShufPD ||
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isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
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std::vector<Constant*> Idxs;
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Value *Op0 = CI->getOperand(1);
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ShuffleVectorInst *SI = NULL;
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if (isLoadH || isLoadL) {
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Value *Op1 = UndefValue::get(Op0->getType());
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Value *Addr = new BitCastInst(CI->getOperand(2),
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Type::getDoublePtrTy(C),
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"upgraded.", CI);
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Value *Load = new LoadInst(Addr, "upgraded.", false, 8, CI);
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Value *Idx = ConstantInt::get(Type::getInt32Ty(C), 0);
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Op1 = InsertElementInst::Create(Op1, Load, Idx, "upgraded.", CI);
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if (isLoadH) {
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 0));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
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} else {
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
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}
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Value *Mask = ConstantVector::get(Idxs);
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SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
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} else if (isMovL) {
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Constant *Zero = ConstantInt::get(Type::getInt32Ty(C), 0);
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Idxs.push_back(Zero);
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Idxs.push_back(Zero);
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Idxs.push_back(Zero);
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Idxs.push_back(Zero);
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Value *ZeroV = ConstantVector::get(Idxs);
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Idxs.clear();
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 4));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 5));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 3));
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Value *Mask = ConstantVector::get(Idxs);
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SI = new ShuffleVectorInst(ZeroV, Op0, Mask, "upgraded.", CI);
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} else if (isMovSD ||
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isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
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Value *Op1 = CI->getOperand(2);
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if (isMovSD) {
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
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} else if (isUnpckhPD || isPunpckhQPD) {
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 3));
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} else {
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 0));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), 2));
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}
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Value *Mask = ConstantVector::get(Idxs);
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SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
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} else if (isShufPD) {
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Value *Op1 = CI->getOperand(2);
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unsigned MaskVal = cast<ConstantInt>(CI->getOperand(3))->getZExtValue();
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C), MaskVal & 1));
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Idxs.push_back(ConstantInt::get(Type::getInt32Ty(C),
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((MaskVal >> 1) & 1)+2));
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Value *Mask = ConstantVector::get(Idxs);
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SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
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}
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assert(SI && "Unexpected!");
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// Handle any uses of the old CallInst.
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if (!CI->use_empty())
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// Replace all uses of the old call with the new cast which has the
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// correct type.
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CI->replaceAllUsesWith(SI);
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// Clean up the old call now that it has been completely upgraded.
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CI->eraseFromParent();
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} else if (F->getName() == "llvm.x86.sse41.pmulld") {
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// Upgrade this set of intrinsics into vector multiplies.
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Instruction *Mul = BinaryOperator::CreateMul(CI->getOperand(1),
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CI->getOperand(2),
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CI->getName(),
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CI);
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// Fix up all the uses with our new multiply.
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if (!CI->use_empty())
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CI->replaceAllUsesWith(Mul);
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// Remove upgraded multiply.
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CI->eraseFromParent();
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} else {
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llvm_unreachable("Unknown function for CallInst upgrade.");
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}
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return;
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}
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switch (NewFn->getIntrinsicID()) {
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default: llvm_unreachable("Unknown function for CallInst upgrade.");
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case Intrinsic::x86_mmx_psll_d:
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case Intrinsic::x86_mmx_psll_q:
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case Intrinsic::x86_mmx_psll_w:
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case Intrinsic::x86_mmx_psra_d:
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case Intrinsic::x86_mmx_psra_w:
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case Intrinsic::x86_mmx_psrl_d:
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case Intrinsic::x86_mmx_psrl_q:
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case Intrinsic::x86_mmx_psrl_w: {
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Value *Operands[2];
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Operands[0] = CI->getOperand(1);
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// Cast the second parameter to the correct type.
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BitCastInst *BC = new BitCastInst(CI->getOperand(2),
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NewFn->getFunctionType()->getParamType(1),
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"upgraded.", CI);
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Operands[1] = BC;
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// Construct a new CallInst
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CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+2,
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"upgraded."+CI->getName(), CI);
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NewCI->setTailCall(CI->isTailCall());
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NewCI->setCallingConv(CI->getCallingConv());
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// Handle any uses of the old CallInst.
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if (!CI->use_empty())
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// Replace all uses of the old call with the new cast which has the
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// correct type.
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CI->replaceAllUsesWith(NewCI);
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// Clean up the old call now that it has been completely upgraded.
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CI->eraseFromParent();
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break;
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}
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case Intrinsic::ctlz:
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case Intrinsic::ctpop:
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case Intrinsic::cttz: {
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// Build a small vector of the 1..(N-1) operands, which are the
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// parameters.
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SmallVector<Value*, 8> Operands(CI->op_begin()+1, CI->op_end());
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// Construct a new CallInst
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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;
|
|
case Intrinsic::eh_selector:
|
|
case Intrinsic::eh_typeid_for: {
|
|
// Only the return type changed.
|
|
SmallVector<Value*, 8> Operands(CI->op_begin() + 1, CI->op_end());
|
|
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()) {
|
|
// Construct an appropriate cast from the new return type to the old.
|
|
CastInst *RetCast =
|
|
CastInst::Create(CastInst::getCastOpcode(NewCI, true,
|
|
F->getReturnType(), true),
|
|
NewCI, F->getReturnType(), NewCI->getName(), CI);
|
|
CI->replaceAllUsesWith(RetCast);
|
|
}
|
|
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();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// This function strips all debug info intrinsics, except for llvm.dbg.declare.
|
|
/// If an llvm.dbg.declare intrinsic is invalid, then this function simply
|
|
/// strips that use.
|
|
void llvm::CheckDebugInfoIntrinsics(Module *M) {
|
|
|
|
|
|
if (Function *FuncStart = M->getFunction("llvm.dbg.func.start")) {
|
|
while (!FuncStart->use_empty()) {
|
|
CallInst *CI = cast<CallInst>(FuncStart->use_back());
|
|
CI->eraseFromParent();
|
|
}
|
|
FuncStart->eraseFromParent();
|
|
}
|
|
|
|
if (Function *StopPoint = M->getFunction("llvm.dbg.stoppoint")) {
|
|
while (!StopPoint->use_empty()) {
|
|
CallInst *CI = cast<CallInst>(StopPoint->use_back());
|
|
CI->eraseFromParent();
|
|
}
|
|
StopPoint->eraseFromParent();
|
|
}
|
|
|
|
if (Function *RegionStart = M->getFunction("llvm.dbg.region.start")) {
|
|
while (!RegionStart->use_empty()) {
|
|
CallInst *CI = cast<CallInst>(RegionStart->use_back());
|
|
CI->eraseFromParent();
|
|
}
|
|
RegionStart->eraseFromParent();
|
|
}
|
|
|
|
if (Function *RegionEnd = M->getFunction("llvm.dbg.region.end")) {
|
|
while (!RegionEnd->use_empty()) {
|
|
CallInst *CI = cast<CallInst>(RegionEnd->use_back());
|
|
CI->eraseFromParent();
|
|
}
|
|
RegionEnd->eraseFromParent();
|
|
}
|
|
|
|
if (Function *Declare = M->getFunction("llvm.dbg.declare")) {
|
|
if (!Declare->use_empty()) {
|
|
DbgDeclareInst *DDI = cast<DbgDeclareInst>(Declare->use_back());
|
|
if (!isa<MDNode>(DDI->getOperand(1)) ||!isa<MDNode>(DDI->getOperand(2))) {
|
|
while (!Declare->use_empty()) {
|
|
CallInst *CI = cast<CallInst>(Declare->use_back());
|
|
CI->eraseFromParent();
|
|
}
|
|
Declare->eraseFromParent();
|
|
}
|
|
}
|
|
}
|
|
}
|