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https://github.com/c64scene-ar/llvm-6502.git
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emit a histogram of the opcodes in comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97047 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -20,11 +20,9 @@
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#include "llvm/Support/FormattedStream.h"
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using namespace llvm;
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namespace {
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enum {
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CommentIndent = 30
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};
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}
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/// ClassifyInt - Classify an integer by size, return '1','2','4','8' if this
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/// fits in 1, 2, 4, or 8 sign extended bytes.
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@ -78,6 +76,8 @@ class MatcherTableEmitter {
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DenseMap<Record*, unsigned> NodeXFormMap;
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std::vector<const Record*> NodeXForms;
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// Per opcode frequence count.
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std::vector<unsigned> Histogram;
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public:
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MatcherTableEmitter() {}
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@ -85,6 +85,8 @@ public:
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unsigned StartIdx, formatted_raw_ostream &OS);
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void EmitPredicateFunctions(formatted_raw_ostream &OS);
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void EmitHistogram(formatted_raw_ostream &OS);
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private:
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unsigned EmitMatcher(const MatcherNode *N, unsigned Indent,
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formatted_raw_ostream &OS);
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@ -377,6 +379,10 @@ EmitMatcherList(const MatcherNode *N, unsigned Indent, unsigned CurrentIdx,
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formatted_raw_ostream &OS) {
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unsigned Size = 0;
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while (N) {
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if (unsigned(N->getKind()) >= Histogram.size())
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Histogram.resize(N->getKind()+1);
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Histogram[N->getKind()]++;
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// Push is a special case since it is binary.
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if (const PushMatcherNode *PMN = dyn_cast<PushMatcherNode>(N)) {
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// We need to encode the child and the offset of the failure code before
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@ -498,6 +504,54 @@ void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
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OS << "}\n\n";
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}
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void MatcherTableEmitter::EmitHistogram(formatted_raw_ostream &OS) {
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OS << " // Opcode Histogram:\n";
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for (unsigned i = 0, e = Histogram.size(); i != e; ++i) {
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OS << " // #";
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switch ((MatcherNode::KindTy)i) {
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case MatcherNode::Push: OS << "OPC_Push"; break;
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case MatcherNode::RecordNode: OS << "OPC_RecordNode"; break;
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case MatcherNode::RecordChild: OS << "OPC_RecordChild"; break;
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case MatcherNode::RecordMemRef: OS << "OPC_RecordMemRef"; break;
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case MatcherNode::CaptureFlagInput: OS << "OPC_CaptureFlagInput"; break;
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case MatcherNode::MoveChild: OS << "OPC_MoveChild"; break;
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case MatcherNode::MoveParent: OS << "OPC_MoveParent"; break;
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case MatcherNode::CheckSame: OS << "OPC_CheckSame"; break;
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case MatcherNode::CheckPatternPredicate:
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OS << "OPC_CheckPatternPredicate"; break;
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case MatcherNode::CheckPredicate: OS << "OPC_CheckPredicate"; break;
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case MatcherNode::CheckOpcode: OS << "OPC_CheckOpcode"; break;
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case MatcherNode::CheckMultiOpcode: OS << "OPC_CheckMultiOpcode"; break;
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case MatcherNode::CheckType: OS << "OPC_CheckType"; break;
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case MatcherNode::CheckInteger: OS << "OPC_CheckInteger"; break;
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case MatcherNode::CheckCondCode: OS << "OPC_CheckCondCode"; break;
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case MatcherNode::CheckValueType: OS << "OPC_CheckValueType"; break;
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case MatcherNode::CheckComplexPat: OS << "OPC_CheckComplexPat"; break;
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case MatcherNode::CheckAndImm: OS << "OPC_CheckAndImm"; break;
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case MatcherNode::CheckOrImm: OS << "OPC_CheckOrImm"; break;
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case MatcherNode::CheckFoldableChainNode:
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OS << "OPC_CheckFoldableChainNode"; break;
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case MatcherNode::CheckChainCompatible:
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OS << "OPC_CheckChainCompatible"; break;
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case MatcherNode::EmitInteger: OS << "OPC_EmitInteger"; break;
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case MatcherNode::EmitStringInteger: OS << "OPC_EmitStringInteger"; break;
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case MatcherNode::EmitRegister: OS << "OPC_EmitRegister"; break;
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case MatcherNode::EmitConvertToTarget:
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OS << "OPC_EmitConvertToTarget"; break;
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case MatcherNode::EmitMergeInputChains:
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OS << "OPC_EmitMergeInputChains"; break;
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case MatcherNode::EmitCopyToReg: OS << "OPC_EmitCopyToReg"; break;
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case MatcherNode::EmitNode: OS << "OPC_EmitNode"; break;
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case MatcherNode::EmitNodeXForm: OS << "OPC_EmitNodeXForm"; break;
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case MatcherNode::MarkFlagResults: OS << "OPC_MarkFlagResults"; break;
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case MatcherNode::CompleteMatch: OS << "OPC_CompleteMatch"; break;
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}
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OS.PadToColumn(40) << " = " << Histogram[i] << '\n';
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}
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OS << '\n';
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}
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void llvm::EmitMatcherTable(const MatcherNode *Matcher, raw_ostream &O) {
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formatted_raw_ostream OS(O);
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@ -512,6 +566,9 @@ void llvm::EmitMatcherTable(const MatcherNode *Matcher, raw_ostream &O) {
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OS << " static const unsigned char MatcherTable[] = {\n";
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unsigned TotalSize = MatcherEmitter.EmitMatcherList(Matcher, 5, 0, OS);
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OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
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MatcherEmitter.EmitHistogram(OS);
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OS << " #undef TARGET_OPCODE\n";
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OS << " return SelectCodeCommon(N, MatcherTable,sizeof(MatcherTable));\n}\n";
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OS << "\n";
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