forked from OSchip/llvm-project
505 lines
15 KiB
C++
505 lines
15 KiB
C++
//===- NVPTXUtilities.cpp - Utility 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 contains miscellaneous utility functions
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//===----------------------------------------------------------------------===//
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#include "NVPTXUtilities.h"
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#include "NVPTX.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Operator.h"
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#include <algorithm>
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#include <cstring>
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#include <map>
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#include <string>
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#include <vector>
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//#include <iostream>
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/InstIterator.h"
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using namespace llvm;
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typedef std::map<std::string, std::vector<unsigned> > key_val_pair_t;
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typedef std::map<const GlobalValue *, key_val_pair_t> global_val_annot_t;
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typedef std::map<const Module *, global_val_annot_t> per_module_annot_t;
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ManagedStatic<per_module_annot_t> annotationCache;
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static void cacheAnnotationFromMD(const MDNode *md, key_val_pair_t &retval) {
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assert(md && "Invalid mdnode for annotation");
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assert((md->getNumOperands() % 2) == 1 && "Invalid number of operands");
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// start index = 1, to skip the global variable key
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// increment = 2, to skip the value for each property-value pairs
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for (unsigned i = 1, e = md->getNumOperands(); i != e; i += 2) {
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// property
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const MDString *prop = dyn_cast<MDString>(md->getOperand(i));
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assert(prop && "Annotation property not a string");
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// value
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ConstantInt *Val = dyn_cast<ConstantInt>(md->getOperand(i + 1));
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assert(Val && "Value operand not a constant int");
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std::string keyname = prop->getString().str();
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if (retval.find(keyname) != retval.end())
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retval[keyname].push_back(Val->getZExtValue());
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else {
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std::vector<unsigned> tmp;
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tmp.push_back(Val->getZExtValue());
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retval[keyname] = tmp;
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}
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}
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}
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static void cacheAnnotationFromMD(const Module *m, const GlobalValue *gv) {
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NamedMDNode *NMD = m->getNamedMetadata(llvm::NamedMDForAnnotations);
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if (!NMD)
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return;
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key_val_pair_t tmp;
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for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
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const MDNode *elem = NMD->getOperand(i);
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Value *entity = elem->getOperand(0);
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// entity may be null due to DCE
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if (!entity)
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continue;
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if (entity != gv)
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continue;
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// accumulate annotations for entity in tmp
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cacheAnnotationFromMD(elem, tmp);
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}
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if (tmp.empty()) // no annotations for this gv
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return;
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if ((*annotationCache).find(m) != (*annotationCache).end())
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(*annotationCache)[m][gv] = tmp;
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else {
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global_val_annot_t tmp1;
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tmp1[gv] = tmp;
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(*annotationCache)[m] = tmp1;
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}
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}
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bool llvm::findOneNVVMAnnotation(const GlobalValue *gv, std::string prop,
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unsigned &retval) {
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const Module *m = gv->getParent();
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if ((*annotationCache).find(m) == (*annotationCache).end())
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cacheAnnotationFromMD(m, gv);
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else if ((*annotationCache)[m].find(gv) == (*annotationCache)[m].end())
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cacheAnnotationFromMD(m, gv);
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if ((*annotationCache)[m][gv].find(prop) == (*annotationCache)[m][gv].end())
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return false;
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retval = (*annotationCache)[m][gv][prop][0];
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return true;
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}
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bool llvm::findAllNVVMAnnotation(const GlobalValue *gv, std::string prop,
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std::vector<unsigned> &retval) {
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const Module *m = gv->getParent();
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if ((*annotationCache).find(m) == (*annotationCache).end())
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cacheAnnotationFromMD(m, gv);
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else if ((*annotationCache)[m].find(gv) == (*annotationCache)[m].end())
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cacheAnnotationFromMD(m, gv);
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if ((*annotationCache)[m][gv].find(prop) == (*annotationCache)[m][gv].end())
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return false;
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retval = (*annotationCache)[m][gv][prop];
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return true;
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}
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bool llvm::isTexture(const llvm::Value &val) {
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if (const GlobalValue *gv = dyn_cast<GlobalValue>(&val)) {
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unsigned annot;
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if (llvm::findOneNVVMAnnotation(
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gv, llvm::PropertyAnnotationNames[llvm::PROPERTY_ISTEXTURE],
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annot)) {
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assert((annot == 1) && "Unexpected annotation on a texture symbol");
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return true;
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}
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}
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return false;
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}
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bool llvm::isSurface(const llvm::Value &val) {
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if (const GlobalValue *gv = dyn_cast<GlobalValue>(&val)) {
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unsigned annot;
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if (llvm::findOneNVVMAnnotation(
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gv, llvm::PropertyAnnotationNames[llvm::PROPERTY_ISSURFACE],
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annot)) {
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assert((annot == 1) && "Unexpected annotation on a surface symbol");
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return true;
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}
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}
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return false;
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}
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bool llvm::isSampler(const llvm::Value &val) {
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if (const GlobalValue *gv = dyn_cast<GlobalValue>(&val)) {
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unsigned annot;
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if (llvm::findOneNVVMAnnotation(
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gv, llvm::PropertyAnnotationNames[llvm::PROPERTY_ISSAMPLER],
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annot)) {
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assert((annot == 1) && "Unexpected annotation on a sampler symbol");
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return true;
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}
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}
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if (const Argument *arg = dyn_cast<Argument>(&val)) {
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const Function *func = arg->getParent();
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std::vector<unsigned> annot;
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if (llvm::findAllNVVMAnnotation(
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func, llvm::PropertyAnnotationNames[llvm::PROPERTY_ISSAMPLER],
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annot)) {
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if (std::find(annot.begin(), annot.end(), arg->getArgNo()) != annot.end())
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return true;
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}
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}
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return false;
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}
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bool llvm::isImageReadOnly(const llvm::Value &val) {
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if (const Argument *arg = dyn_cast<Argument>(&val)) {
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const Function *func = arg->getParent();
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std::vector<unsigned> annot;
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if (llvm::findAllNVVMAnnotation(func,
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llvm::PropertyAnnotationNames[
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llvm::PROPERTY_ISREADONLY_IMAGE_PARAM],
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annot)) {
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if (std::find(annot.begin(), annot.end(), arg->getArgNo()) != annot.end())
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return true;
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}
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}
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return false;
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}
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bool llvm::isImageWriteOnly(const llvm::Value &val) {
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if (const Argument *arg = dyn_cast<Argument>(&val)) {
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const Function *func = arg->getParent();
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std::vector<unsigned> annot;
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if (llvm::findAllNVVMAnnotation(func,
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llvm::PropertyAnnotationNames[
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llvm::PROPERTY_ISWRITEONLY_IMAGE_PARAM],
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annot)) {
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if (std::find(annot.begin(), annot.end(), arg->getArgNo()) != annot.end())
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return true;
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}
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}
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return false;
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}
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bool llvm::isImage(const llvm::Value &val) {
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return llvm::isImageReadOnly(val) || llvm::isImageWriteOnly(val);
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}
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std::string llvm::getTextureName(const llvm::Value &val) {
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assert(val.hasName() && "Found texture variable with no name");
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return val.getName();
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}
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std::string llvm::getSurfaceName(const llvm::Value &val) {
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assert(val.hasName() && "Found surface variable with no name");
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return val.getName();
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}
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std::string llvm::getSamplerName(const llvm::Value &val) {
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assert(val.hasName() && "Found sampler variable with no name");
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return val.getName();
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}
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bool llvm::getMaxNTIDx(const Function &F, unsigned &x) {
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return (llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_MAXNTID_X], x));
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}
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bool llvm::getMaxNTIDy(const Function &F, unsigned &y) {
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return (llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_MAXNTID_Y], y));
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}
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bool llvm::getMaxNTIDz(const Function &F, unsigned &z) {
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return (llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_MAXNTID_Z], z));
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}
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bool llvm::getReqNTIDx(const Function &F, unsigned &x) {
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return (llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_REQNTID_X], x));
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}
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bool llvm::getReqNTIDy(const Function &F, unsigned &y) {
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return (llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_REQNTID_Y], y));
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}
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bool llvm::getReqNTIDz(const Function &F, unsigned &z) {
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return (llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_REQNTID_Z], z));
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}
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bool llvm::getMinCTASm(const Function &F, unsigned &x) {
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return (llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_MINNCTAPERSM], x));
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}
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bool llvm::isKernelFunction(const Function &F) {
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unsigned x = 0;
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bool retval = llvm::findOneNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_ISKERNEL_FUNCTION], x);
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if (retval == false) {
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// There is no NVVM metadata, check the calling convention
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if (F.getCallingConv() == llvm::CallingConv::PTX_Kernel)
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return true;
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else
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return false;
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}
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return (x == 1);
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}
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bool llvm::getAlign(const Function &F, unsigned index, unsigned &align) {
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std::vector<unsigned> Vs;
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bool retval = llvm::findAllNVVMAnnotation(
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&F, llvm::PropertyAnnotationNames[llvm::PROPERTY_ALIGN], Vs);
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if (retval == false)
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return false;
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for (int i = 0, e = Vs.size(); i < e; i++) {
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unsigned v = Vs[i];
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if ((v >> 16) == index) {
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align = v & 0xFFFF;
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return true;
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}
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}
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return false;
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}
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bool llvm::getAlign(const CallInst &I, unsigned index, unsigned &align) {
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if (MDNode *alignNode = I.getMetadata("callalign")) {
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for (int i = 0, n = alignNode->getNumOperands(); i < n; i++) {
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if (const ConstantInt *CI =
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dyn_cast<ConstantInt>(alignNode->getOperand(i))) {
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unsigned v = CI->getZExtValue();
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if ((v >> 16) == index) {
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align = v & 0xFFFF;
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return true;
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}
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if ((v >> 16) > index) {
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return false;
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}
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}
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}
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}
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return false;
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}
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bool llvm::isBarrierIntrinsic(Intrinsic::ID id) {
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if ((id == Intrinsic::nvvm_barrier0) ||
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(id == Intrinsic::nvvm_barrier0_popc) ||
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(id == Intrinsic::nvvm_barrier0_and) ||
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(id == Intrinsic::nvvm_barrier0_or) ||
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(id == Intrinsic::cuda_syncthreads))
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return true;
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return false;
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}
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// Interface for checking all memory space transfer related intrinsics
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bool llvm::isMemorySpaceTransferIntrinsic(Intrinsic::ID id) {
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if (id == Intrinsic::nvvm_ptr_local_to_gen ||
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id == Intrinsic::nvvm_ptr_shared_to_gen ||
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id == Intrinsic::nvvm_ptr_global_to_gen ||
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id == Intrinsic::nvvm_ptr_constant_to_gen ||
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id == Intrinsic::nvvm_ptr_gen_to_global ||
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id == Intrinsic::nvvm_ptr_gen_to_shared ||
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id == Intrinsic::nvvm_ptr_gen_to_local ||
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id == Intrinsic::nvvm_ptr_gen_to_constant ||
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id == Intrinsic::nvvm_ptr_gen_to_param) {
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return true;
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}
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return false;
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}
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// consider several special intrinsics in striping pointer casts, and
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// provide an option to ignore GEP indicies for find out the base address only
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// which could be used in simple alias disambigurate.
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const Value *
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llvm::skipPointerTransfer(const Value *V, bool ignore_GEP_indices) {
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V = V->stripPointerCasts();
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while (true) {
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if (const IntrinsicInst *IS = dyn_cast<IntrinsicInst>(V)) {
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if (isMemorySpaceTransferIntrinsic(IS->getIntrinsicID())) {
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V = IS->getArgOperand(0)->stripPointerCasts();
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continue;
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}
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} else if (ignore_GEP_indices)
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if (const GEPOperator *GEP = dyn_cast<GEPOperator>(V)) {
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V = GEP->getPointerOperand()->stripPointerCasts();
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continue;
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}
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break;
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}
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return V;
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}
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// consider several special intrinsics in striping pointer casts, and
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// - ignore GEP indicies for find out the base address only, and
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// - tracking PHINode
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// which could be used in simple alias disambigurate.
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const Value *
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llvm::skipPointerTransfer(const Value *V, std::set<const Value *> &processed) {
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if (processed.find(V) != processed.end())
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return NULL;
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processed.insert(V);
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const Value *V2 = V->stripPointerCasts();
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if (V2 != V && processed.find(V2) != processed.end())
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return NULL;
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processed.insert(V2);
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V = V2;
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while (true) {
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if (const IntrinsicInst *IS = dyn_cast<IntrinsicInst>(V)) {
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if (isMemorySpaceTransferIntrinsic(IS->getIntrinsicID())) {
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V = IS->getArgOperand(0)->stripPointerCasts();
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continue;
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}
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} else if (const GEPOperator *GEP = dyn_cast<GEPOperator>(V)) {
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V = GEP->getPointerOperand()->stripPointerCasts();
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continue;
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} else if (const PHINode *PN = dyn_cast<PHINode>(V)) {
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if (V != V2 && processed.find(V) != processed.end())
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return NULL;
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processed.insert(PN);
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const Value *common = 0;
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for (unsigned i = 0; i != PN->getNumIncomingValues(); ++i) {
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const Value *pv = PN->getIncomingValue(i);
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const Value *base = skipPointerTransfer(pv, processed);
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if (base) {
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if (common == 0)
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common = base;
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else if (common != base)
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return PN;
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}
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}
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if (common == 0)
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return PN;
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V = common;
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}
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break;
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}
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return V;
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}
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// The following are some useful utilities for debuggung
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BasicBlock *llvm::getParentBlock(Value *v) {
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if (BasicBlock *B = dyn_cast<BasicBlock>(v))
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return B;
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if (Instruction *I = dyn_cast<Instruction>(v))
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return I->getParent();
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return 0;
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}
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Function *llvm::getParentFunction(Value *v) {
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if (Function *F = dyn_cast<Function>(v))
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return F;
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if (Instruction *I = dyn_cast<Instruction>(v))
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return I->getParent()->getParent();
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if (BasicBlock *B = dyn_cast<BasicBlock>(v))
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return B->getParent();
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return 0;
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}
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// Dump a block by name
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void llvm::dumpBlock(Value *v, char *blockName) {
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Function *F = getParentFunction(v);
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if (F == 0)
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return;
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for (Function::iterator it = F->begin(), ie = F->end(); it != ie; ++it) {
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BasicBlock *B = it;
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if (strcmp(B->getName().data(), blockName) == 0) {
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B->dump();
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return;
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}
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}
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}
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// Find an instruction by name
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Instruction *llvm::getInst(Value *base, char *instName) {
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Function *F = getParentFunction(base);
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if (F == 0)
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return 0;
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for (inst_iterator it = inst_begin(F), ie = inst_end(F); it != ie; ++it) {
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Instruction *I = &*it;
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if (strcmp(I->getName().data(), instName) == 0) {
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return I;
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}
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}
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return 0;
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}
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// Dump an instruction by nane
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void llvm::dumpInst(Value *base, char *instName) {
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Instruction *I = getInst(base, instName);
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if (I)
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I->dump();
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}
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// Dump an instruction and all dependent instructions
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void llvm::dumpInstRec(Value *v, std::set<Instruction *> *visited) {
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if (Instruction *I = dyn_cast<Instruction>(v)) {
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if (visited->find(I) != visited->end())
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return;
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visited->insert(I);
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for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i)
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dumpInstRec(I->getOperand(i), visited);
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I->dump();
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}
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}
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// Dump an instruction and all dependent instructions
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void llvm::dumpInstRec(Value *v) {
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std::set<Instruction *> visited;
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//BasicBlock *B = getParentBlock(v);
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dumpInstRec(v, &visited);
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}
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// Dump the parent for Instruction, block or function
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void llvm::dumpParent(Value *v) {
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if (Instruction *I = dyn_cast<Instruction>(v)) {
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I->getParent()->dump();
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return;
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}
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if (BasicBlock *B = dyn_cast<BasicBlock>(v)) {
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B->getParent()->dump();
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return;
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}
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if (Function *F = dyn_cast<Function>(v)) {
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F->getParent()->dump();
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return;
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}
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}
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