1 //===------------------ llvm-opt-report/OptReport.cpp ---------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
10 /// This file implements a tool that can parse the YAML optimization
11 /// records and generate an optimization summary annotated source listing
14 //===----------------------------------------------------------------------===//
16 #include "llvm-c/Remarks.h"
17 #include "llvm/Demangle/Demangle.h"
18 #include "llvm/Remarks/RemarkParser.h"
19 #include "llvm/Support/CommandLine.h"
20 #include "llvm/Support/Error.h"
21 #include "llvm/Support/ErrorOr.h"
22 #include "llvm/Support/FileSystem.h"
23 #include "llvm/Support/Format.h"
24 #include "llvm/Support/InitLLVM.h"
25 #include "llvm/Support/LineIterator.h"
26 #include "llvm/Support/MemoryBuffer.h"
27 #include "llvm/Support/Path.h"
28 #include "llvm/Support/Program.h"
29 #include "llvm/Support/WithColor.h"
30 #include "llvm/Support/YAMLTraits.h"
31 #include "llvm/Support/raw_ostream.h"
37 using namespace llvm::yaml;
39 // Mark all our options with this category, everything else (except for -version
40 // and -help) will be hidden.
41 static cl::OptionCategory
42 OptReportCategory("llvm-opt-report options");
44 static cl::opt<std::string>
45 InputFileName(cl::Positional, cl::desc("<input>"), cl::init("-"),
46 cl::cat(OptReportCategory));
48 static cl::opt<std::string>
49 OutputFileName("o", cl::desc("Output file"), cl::init("-"),
50 cl::cat(OptReportCategory));
52 static cl::opt<std::string>
53 InputRelDir("r", cl::desc("Root for relative input paths"), cl::init(""),
54 cl::cat(OptReportCategory));
57 Succinct("s", cl::desc("Don't include vectorization factors, etc."),
58 cl::init(false), cl::cat(OptReportCategory));
61 NoDemangle("no-demangle", cl::desc("Don't demangle function names"),
62 cl::init(false), cl::cat(OptReportCategory));
65 // For each location in the source file, the common per-transformation state
67 struct OptReportLocationItemInfo {
68 bool Analyzed = false;
69 bool Transformed = false;
71 OptReportLocationItemInfo &operator |= (
72 const OptReportLocationItemInfo &RHS) {
73 Analyzed |= RHS.Analyzed;
74 Transformed |= RHS.Transformed;
79 bool operator < (const OptReportLocationItemInfo &RHS) const {
80 if (Analyzed < RHS.Analyzed)
82 else if (Analyzed > RHS.Analyzed)
84 else if (Transformed < RHS.Transformed)
90 // The per-location information collected for producing an optimization report.
91 struct OptReportLocationInfo {
92 OptReportLocationItemInfo Inlined;
93 OptReportLocationItemInfo Unrolled;
94 OptReportLocationItemInfo Vectorized;
96 int VectorizationFactor = 1;
97 int InterleaveCount = 1;
100 OptReportLocationInfo &operator |= (const OptReportLocationInfo &RHS) {
101 Inlined |= RHS.Inlined;
102 Unrolled |= RHS.Unrolled;
103 Vectorized |= RHS.Vectorized;
105 VectorizationFactor =
106 std::max(VectorizationFactor, RHS.VectorizationFactor);
107 InterleaveCount = std::max(InterleaveCount, RHS.InterleaveCount);
108 UnrollCount = std::max(UnrollCount, RHS.UnrollCount);
113 bool operator < (const OptReportLocationInfo &RHS) const {
114 if (Inlined < RHS.Inlined)
116 else if (RHS.Inlined < Inlined)
118 else if (Unrolled < RHS.Unrolled)
120 else if (RHS.Unrolled < Unrolled)
122 else if (Vectorized < RHS.Vectorized)
124 else if (RHS.Vectorized < Vectorized || Succinct)
126 else if (VectorizationFactor < RHS.VectorizationFactor)
128 else if (VectorizationFactor > RHS.VectorizationFactor)
130 else if (InterleaveCount < RHS.InterleaveCount)
132 else if (InterleaveCount > RHS.InterleaveCount)
134 else if (UnrollCount < RHS.UnrollCount)
140 typedef std::map<std::string, std::map<int, std::map<std::string, std::map<int,
141 OptReportLocationInfo>>>> LocationInfoTy;
142 } // anonymous namespace
144 static bool readLocationInfo(LocationInfoTy &LocationInfo) {
145 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
146 MemoryBuffer::getFile(InputFileName.c_str());
147 if (std::error_code EC = Buf.getError()) {
148 WithColor::error() << "Can't open file " << InputFileName << ": "
149 << EC.message() << "\n";
153 remarks::Parser Parser((*Buf)->getBuffer());
156 Expected<const remarks::Remark *> RemarkOrErr = Parser.getNext();
158 handleAllErrors(RemarkOrErr.takeError(), [&](const ErrorInfoBase &PE) {
159 PE.log(WithColor::error());
163 if (!*RemarkOrErr) // End of file.
166 const remarks::Remark &Remark = **RemarkOrErr;
168 bool Transformed = Remark.RemarkType == remarks::Type::Passed;
170 int VectorizationFactor = 1;
171 int InterleaveCount = 1;
174 for (const remarks::Argument &Arg : Remark.Args) {
175 if (Arg.Key == "VectorizationFactor")
176 Arg.Val.getAsInteger(10, VectorizationFactor);
177 else if (Arg.Key == "InterleaveCount")
178 Arg.Val.getAsInteger(10, InterleaveCount);
179 else if (Arg.Key == "UnrollCount")
180 Arg.Val.getAsInteger(10, UnrollCount);
183 const Optional<remarks::RemarkLocation> &Loc = Remark.Loc;
187 StringRef File = Loc->SourceFilePath;
188 unsigned Line = Loc->SourceLine;
189 unsigned Column = Loc->SourceColumn;
191 // We track information on both actual and potential transformations. This
192 // way, if there are multiple possible things on a line that are, or could
193 // have been transformed, we can indicate that explicitly in the output.
194 auto UpdateLLII = [Transformed](OptReportLocationItemInfo &LLII) {
195 LLII.Analyzed = true;
197 LLII.Transformed = true;
200 if (Remark.PassName == "inline") {
201 auto &LI = LocationInfo[File][Line][Remark.FunctionName][Column];
202 UpdateLLII(LI.Inlined);
203 } else if (Remark.PassName == "loop-unroll") {
204 auto &LI = LocationInfo[File][Line][Remark.FunctionName][Column];
205 LI.UnrollCount = UnrollCount;
206 UpdateLLII(LI.Unrolled);
207 } else if (Remark.PassName == "loop-vectorize") {
208 auto &LI = LocationInfo[File][Line][Remark.FunctionName][Column];
209 LI.VectorizationFactor = VectorizationFactor;
210 LI.InterleaveCount = InterleaveCount;
211 UpdateLLII(LI.Vectorized);
218 static bool writeReport(LocationInfoTy &LocationInfo) {
220 llvm::raw_fd_ostream OS(OutputFileName, EC,
221 llvm::sys::fs::F_Text);
223 WithColor::error() << "Can't open file " << OutputFileName << ": "
224 << EC.message() << "\n";
228 bool FirstFile = true;
229 for (auto &FI : LocationInfo) {
230 SmallString<128> FileName(FI.first);
231 if (!InputRelDir.empty())
232 sys::fs::make_absolute(InputRelDir, FileName);
234 const auto &FileInfo = FI.second;
236 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
237 MemoryBuffer::getFile(FileName);
238 if (std::error_code EC = Buf.getError()) {
239 WithColor::error() << "Can't open file " << FileName << ": "
240 << EC.message() << "\n";
249 OS << "< " << FileName << "\n";
251 // Figure out how many characters we need for the vectorization factors
253 OptReportLocationInfo MaxLI;
254 for (auto &FLI : FileInfo)
255 for (auto &FI : FLI.second)
256 for (auto &LI : FI.second)
259 bool NothingInlined = !MaxLI.Inlined.Transformed;
260 bool NothingUnrolled = !MaxLI.Unrolled.Transformed;
261 bool NothingVectorized = !MaxLI.Vectorized.Transformed;
263 unsigned VFDigits = llvm::utostr(MaxLI.VectorizationFactor).size();
264 unsigned ICDigits = llvm::utostr(MaxLI.InterleaveCount).size();
265 unsigned UCDigits = llvm::utostr(MaxLI.UnrollCount).size();
267 // Figure out how many characters we need for the line numbers.
268 int64_t NumLines = 0;
269 for (line_iterator LI(*Buf.get(), false); LI != line_iterator(); ++LI)
272 unsigned LNDigits = llvm::utostr(NumLines).size();
274 for (line_iterator LI(*Buf.get(), false); LI != line_iterator(); ++LI) {
275 int64_t L = LI.line_number();
276 auto LII = FileInfo.find(L);
278 auto PrintLine = [&](bool PrintFuncName,
279 const std::set<std::string> &FuncNameSet) {
280 OptReportLocationInfo LLI;
282 std::map<int, OptReportLocationInfo> ColsInfo;
283 unsigned InlinedCols = 0, UnrolledCols = 0, VectorizedCols = 0;
285 if (LII != FileInfo.end() && !FuncNameSet.empty()) {
286 const auto &LineInfo = LII->second;
288 for (auto &CI : LineInfo.find(*FuncNameSet.begin())->second) {
290 ColsInfo[Col] = CI.second;
291 InlinedCols += CI.second.Inlined.Analyzed;
292 UnrolledCols += CI.second.Unrolled.Analyzed;
293 VectorizedCols += CI.second.Vectorized.Analyzed;
301 bool FirstFunc = true;
302 for (const auto &FuncName : FuncNameSet) {
308 bool Printed = false;
312 itaniumDemangle(FuncName.c_str(), nullptr, nullptr, &Status);
313 if (Demangled && Status == 0) {
319 std::free(Demangled);
329 // We try to keep the output as concise as possible. If only one thing on
330 // a given line could have been inlined, vectorized, etc. then we can put
331 // the marker on the source line itself. If there are multiple options
332 // then we want to distinguish them by placing the marker for each
333 // transformation on a separate line following the source line. When we
334 // do this, we use a '^' character to point to the appropriate column in
337 std::string USpaces(Succinct ? 0 : UCDigits, ' ');
338 std::string VSpaces(Succinct ? 0 : VFDigits + ICDigits + 1, ' ');
340 auto UStr = [UCDigits](OptReportLocationInfo &LLI) {
342 raw_string_ostream RS(R);
345 RS << LLI.UnrollCount;
346 RS << std::string(UCDigits - RS.str().size(), ' ');
352 auto VStr = [VFDigits,
353 ICDigits](OptReportLocationInfo &LLI) -> std::string {
355 raw_string_ostream RS(R);
358 RS << LLI.VectorizationFactor << "," << LLI.InterleaveCount;
359 RS << std::string(VFDigits + ICDigits + 1 - RS.str().size(), ' ');
365 OS << llvm::format_decimal(L, LNDigits) << " ";
366 OS << (LLI.Inlined.Transformed && InlinedCols < 2 ? "I" :
367 (NothingInlined ? "" : " "));
368 OS << (LLI.Unrolled.Transformed && UnrolledCols < 2 ?
369 "U" + UStr(LLI) : (NothingUnrolled ? "" : " " + USpaces));
370 OS << (LLI.Vectorized.Transformed && VectorizedCols < 2 ?
371 "V" + VStr(LLI) : (NothingVectorized ? "" : " " + VSpaces));
373 OS << " | " << *LI << "\n";
375 for (auto &J : ColsInfo) {
376 if ((J.second.Inlined.Transformed && InlinedCols > 1) ||
377 (J.second.Unrolled.Transformed && UnrolledCols > 1) ||
378 (J.second.Vectorized.Transformed && VectorizedCols > 1)) {
379 OS << std::string(LNDigits + 1, ' ');
380 OS << (J.second.Inlined.Transformed &&
381 InlinedCols > 1 ? "I" : (NothingInlined ? "" : " "));
382 OS << (J.second.Unrolled.Transformed &&
383 UnrolledCols > 1 ? "U" + UStr(J.second) :
384 (NothingUnrolled ? "" : " " + USpaces));
385 OS << (J.second.Vectorized.Transformed &&
386 VectorizedCols > 1 ? "V" + VStr(J.second) :
387 (NothingVectorized ? "" : " " + VSpaces));
389 OS << " | " << std::string(J.first - 1, ' ') << "^\n";
394 // We need to figure out if the optimizations for this line were the same
395 // in each function context. If not, then we want to group the similar
396 // function contexts together and display each group separately. If
397 // they're all the same, then we only display the line once without any
398 // additional markings.
399 std::map<std::map<int, OptReportLocationInfo>,
400 std::set<std::string>> UniqueLIs;
402 OptReportLocationInfo AllLI;
403 if (LII != FileInfo.end()) {
404 const auto &FuncLineInfo = LII->second;
405 for (const auto &FLII : FuncLineInfo) {
406 UniqueLIs[FLII.second].insert(FLII.first);
408 for (const auto &OI : FLII.second)
413 bool NothingHappened = !AllLI.Inlined.Transformed &&
414 !AllLI.Unrolled.Transformed &&
415 !AllLI.Vectorized.Transformed;
416 if (UniqueLIs.size() > 1 && !NothingHappened) {
418 for (const auto &FSLI : UniqueLIs)
419 PrintLine(true, FSLI.second);
421 } else if (UniqueLIs.size() == 1) {
422 PrintLine(false, UniqueLIs.begin()->second);
424 PrintLine(false, std::set<std::string>());
432 int main(int argc, const char **argv) {
433 InitLLVM X(argc, argv);
435 cl::HideUnrelatedOptions(OptReportCategory);
436 cl::ParseCommandLineOptions(
438 "A tool to generate an optimization report from YAML optimization"
441 LocationInfoTy LocationInfo;
442 if (!readLocationInfo(LocationInfo))
444 if (!writeReport(LocationInfo))