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emit spiffy little histograms of codes, if enabled. Don't print averages if

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there is only one item.

llvm-svn: 36773
This commit is contained in:
Chris Lattner 2007-05-05 01:46:49 +00:00
parent b0f9baa6d6
commit d3a2d22853
1 changed files with 47 additions and 11 deletions
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58
tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
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@ -41,6 +41,7 @@
#include "llvm/System/Signals.h"
#include <fstream>
#include <iostream>
#include <algorithm>
using namespace llvm;
static cl::opt<std::string>
@ -58,6 +59,8 @@ static cl::opt<bool> Verify("verify", cl::desc("Progressively verify module"));
//===----------------------------------------------------------------------===//
static cl::opt<bool> Bitcode("bitcode", cl::desc("Read a bitcode file"));
static cl::opt<bool> NoHistogram("disable-histogram",
cl::desc("Do not print per-code histogram"));
static cl::opt<bool>
NonSymbolic("non-symbolic",
@ -110,7 +113,6 @@ static const char *GetCodeName(unsigned CodeID, unsigned BlockID) {
return 0;
}
if (CurStreamType != LLVMIRBitstream) return 0;
switch (BlockID) {
@ -232,6 +234,9 @@ struct PerBlockIDStats {
/// number that are abbreviated.
unsigned NumRecords, NumAbbreviatedRecords;
/// CodeFreq - Keep track of the number of times we see each code.
std::vector<unsigned> CodeFreq;
PerBlockIDStats()
: NumInstances(0), NumBits(0),
NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
@ -334,7 +339,11 @@ static bool ParseBlock(BitstreamReader &Stream, unsigned IndentLevel) {
Record.clear();
unsigned Code = Stream.ReadRecord(AbbrevID, Record);
// TODO: Compute per-blockid/code stats.
// Increment the # occurrences of this code.
if (BlockStats.CodeFreq.size() <= Code)
BlockStats.CodeFreq.resize(Code+1);
BlockStats.CodeFreq[Code]++;
if (Dump) {
std::cerr << Indent << " <";
@ -442,21 +451,48 @@ static int AnalyzeBitcode() {
std::cerr << " Total Size: ";
PrintSize(Stats.NumBits);
std::cerr << "\n";
std::cerr << " Average Size: ";
PrintSize(Stats.NumBits/(double)Stats.NumInstances);
std::cerr << "\n";
std::cerr << " % of file: "
<< Stats.NumBits/(double)BufferSizeBits*100 << "\n";
std::cerr << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
<< Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
std::cerr << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
<< Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
std::cerr << " Tot/Avg Records: " << Stats.NumRecords << "/"
<< Stats.NumRecords/(double)Stats.NumInstances << "\n";
if (Stats.NumInstances > 1) {
std::cerr << " Average Size: ";
PrintSize(Stats.NumBits/(double)Stats.NumInstances);
std::cerr << "\n";
std::cerr << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
<< Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
std::cerr << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
<< Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
std::cerr << " Tot/Avg Records: " << Stats.NumRecords << "/"
<< Stats.NumRecords/(double)Stats.NumInstances << "\n";
} else {
std::cerr << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
std::cerr << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
std::cerr << " Num Records: " << Stats.NumRecords << "\n";
}
if (Stats.NumRecords)
std::cerr << " % Abbrev Recs: " << (Stats.NumAbbreviatedRecords/
(double)Stats.NumRecords)*100 << "\n";
std::cerr << "\n";
// Print a histogram of the codes we see.
if (!NoHistogram && !Stats.CodeFreq.empty()) {
std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code>
for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
if (unsigned Freq = Stats.CodeFreq[i])
FreqPairs.push_back(std::make_pair(Freq, i));
std::stable_sort(FreqPairs.begin(), FreqPairs.end());
std::reverse(FreqPairs.begin(), FreqPairs.end());
std::cerr << "\tCode Histogram:\n";
for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
std::cerr << "\t\t" << FreqPairs[i].first << "\t";
if (const char *CodeName = GetCodeName(FreqPairs[i].second, I->first))
std::cerr << CodeName << "\n";
else
std::cerr << "UnknownCode" << FreqPairs[i].second << "\n";
}
std::cerr << "\n";
}
}
return 0;
}