DefinednessAnalysis::DefinednessAnalysis(AST_arguments *args, CFG* cfg, ScopeInfo *scope_info) : scope_info(scope_info) {
results = computeFixedPoint(cfg, DefinednessBBAnalyzer(cfg, args), false);
for (const auto &p : results) {
RequiredSet required;
for (const auto &p2 : p.second) {
if (scope_info->refersToGlobal(p2.first))
continue;
//printf("%d %s %d\n", p.first->idx, p2.first.c_str(), p2.second);
required.insert(p2.first);
}
defined.insert(make_pair(p.first, required));
}
}
DefinednessAnalysis::DefinednessAnalysis(AST_arguments *args, CFG* cfg, ScopeInfo *scope_info) : scope_info(scope_info) {
results = computeFixedPoint(cfg, DefinednessBBAnalyzer(args), false);
for (std::unordered_map<CFGBlock*, std::unordered_map<std::string, DefinitionLevel> >::iterator
it = results.begin(), end = results.end(); it != end; ++it) {
RequiredSet required;
for (std::unordered_map<std::string, DefinitionLevel>::iterator it2 = it->second.begin(), end2 = it->second.end();
it2 != end2; ++it2) {
if (scope_info->refersToGlobal(it2->first))
continue;
//printf("%d %s %d\n", it->first->idx, it2->first.c_str(), it2->second);
required.insert(it2->first);
}
defined.insert(make_pair(it->first, required));
}
}
DefinednessAnalysis::DefinednessAnalysis(const SourceInfo::ArgNames& arg_names, CFG* cfg, ScopeInfo* scope_info)
: scope_info(scope_info) {
Timer _t("DefinednessAnalysis()", 10);
results = computeFixedPoint(cfg, DefinednessBBAnalyzer(cfg, arg_names), false);
for (const auto& p : results) {
RequiredSet required;
for (const auto& p2 : p.second) {
if (scope_info->refersToGlobal(p2.first))
continue;
// printf("%d %s %d\n", p.first->idx, p2.first.c_str(), p2.second);
required.insert(p2.first);
}
defined_at_end.insert(make_pair(p.first, required));
}
static StatCounter us_definedness("us_compiling_analysis_definedness");
us_definedness.log(_t.end());
}
int main(int argc, char* argv[])
{
int nStatus = 0;
double nP0;
double nRelativeError;
double nP;
int nMaxIter;
printf("\n *** Fixed-Point Iteration *** ");
printf("\n\n Using g(x) = -4 + 4x - x^2/2 ");
/* Ask for input */
printf("\n\n Enter the initial value P0 : ");
scanf("%lf",&nP0); fflush(stdin);
printf(" Enter the maximum number of iterations: ");
scanf("%d",&nMaxIter);
fflush(stdin);
/* Copmpute the the fixed-point iteration */
nStatus = computeFixedPoint(nP0,gFunc,nMaxIter,200,1,&nP,&nRelativeError);
/* Display output */
if(nStatus == 0)
{
printf("\n The computed fixed point is : %2.8lf",nP);
printf("\n The the relative error is : %2.8lf",nRelativeError);
}
else
{
printf("\n The sequence appears tobe diverging.");
}
printf("\n\nPress any key to continue....");
getch();
return 0;
}
void DefinednessAnalysis::run(const CodeConstants& code_constants,
VRegMap<DefinednessAnalysis::DefinitionLevel> initial_map, CFGBlock* initial_block) {
Timer _t("DefinednessAnalysis()", 10);
// Don't run this twice:
assert(!defined_at_end.size());
auto cfg = initial_block->cfg;
int nvregs = cfg->getVRegInfo().getTotalNumOfVRegs();
assert(initial_map.numVregs() == nvregs);
auto&& vreg_info = cfg->getVRegInfo();
computeFixedPoint(std::move(initial_map), initial_block, DefinednessBBAnalyzer(code_constants), false,
defined_at_beginning, defined_at_end);
for (const auto& p : defined_at_end) {
assert(p.second.numVregs() == nvregs);
assert(!defined_at_end_sets.count(p.first));
VRegSet& required = defined_at_end_sets.insert(std::make_pair(p.first, VRegSet(nvregs))).first->second;
// required.resize(nvregs, /* value= */ false);
for (int vreg = 0; vreg < nvregs; vreg++) {
auto status = p.second[vreg];
// assert(p.second.count(name));
// auto status = p.second.find(name)->second;
assert(status != DefinednessAnalysis::Unknown);
if (status != DefinednessAnalysis::Undefined)
required.set(vreg);
}
}
static StatCounter us_definedness("us_compiling_analysis_definedness");
us_definedness.log(_t.end());
}
