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Pair src/tgt functions in linear time #1331

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Pair src/tgt functions in linear time #1331

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41 changes: 27 additions & 14 deletions tools/alive-tv.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,9 @@
#include <fstream>
#include <iostream>
#include <sstream>
#include <unordered_map>
#include <utility>
#include <vector>

using namespace tools;
using namespace util;
Expand Down Expand Up @@ -143,6 +145,9 @@ and "tgt5" will unused.
verifier.bidirectional = opt_bidirectional;

unique_ptr<llvm::Module> M2;
unordered_map<string, llvm::Function *> M2_funcs;
vector<llvm::Function *> M2_anon_funcs;

if (opt_file2.empty()) {
unsigned Cnt = 0;
for (auto &F1 : *M1.get()) {
Expand Down Expand Up @@ -210,29 +215,37 @@ and "tgt5" will unused.
return -1;
}

// FIXME: quadratic, may not be suitable for very large modules
// emitted by opt-fuzz
for (auto &F2 : *M2.get()) {
if (F2.isDeclaration())
continue;
if (F2.getName().empty())
M2_anon_funcs.push_back(&F2);
else
M2_funcs.emplace(F2.getName().str(), &F2);
}

for (auto &F1 : *M1.get()) {
if (F1.isDeclaration())
continue;
if (F1.getName().empty())
M1_anon_count++;
if (!func_names.empty() && !func_names.count(F1.getName().str()))
continue;
unsigned M2_anon_count = 0;
for (auto &F2 : *M2.get()) {
if (F2.isDeclaration())

llvm::Function *F2;
if (F1.getName().empty()) {
if (M1_anon_count > M2_anon_funcs.size())
continue;
if (F2.getName().empty())
M2_anon_count++;
if ((F1.getName().empty() && (M1_anon_count == M2_anon_count)) ||
(F1.getName() == F2.getName())) {
if (!verifier.compareFunctions(F1, F2))
if (opt_error_fatal)
goto end;
break;
}
F2 = M2_anon_funcs[M1_anon_count - 1];
} else {
auto I = M2_funcs.find(F1.getName().str());
if (I == M2_funcs.end())
continue;
F2 = I->second;
}
if (!verifier.compareFunctions(F1, *F2))
if (opt_error_fatal)
goto end;
}
summary:
*out << "Summary:\n"
Expand Down