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Unified Diff: include/llvm/Bitcode/NaCl/NaClBitcodeAbbrevDist.h

Issue 939073008: Rebased PNaCl localmods in LLVM to 223109 (Closed)
Patch Set: undo localmod Created 5 years, 10 months ago
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Index: include/llvm/Bitcode/NaCl/NaClBitcodeAbbrevDist.h
diff --git a/include/llvm/Bitcode/NaCl/NaClBitcodeAbbrevDist.h b/include/llvm/Bitcode/NaCl/NaClBitcodeAbbrevDist.h
new file mode 100644
index 0000000000000000000000000000000000000000..932b15faa0cdbd95e09af4a8168cb64632255931
--- /dev/null
+++ b/include/llvm/Bitcode/NaCl/NaClBitcodeAbbrevDist.h
@@ -0,0 +1,119 @@
+//===-- NaClBitcodeAbbrevDist.h ---------------------------------------------===//
+// Defines distribution maps for abbreviations associated with
+// bitcode records.
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines distribution maps for tracking abbreviations associated
+// with bitcode records.
+
+#ifndef LLVM_BITCODE_NACL_NACLBITCODEABBREVDIST_H
+#define LLVM_BITCODE_NACL_NACLBITCODEABBREVDIST_H
+
+#include "llvm/Bitcode/NaCl/NaClBitcodeDist.h"
+#include "llvm/Bitcode/NaCl/NaClCompressCodeDist.h"
+
+namespace llvm {
+
+/// Collects the number of instances associated with a given abbreviation
+/// index of a bitcode record. Note: Uses naclbitc::UNABBREV_RECORD index
+/// to denote bitcode records that did not use an abbreviation.
+class NaClBitcodeAbbrevDistElement : public NaClBitcodeDistElement {
+ NaClBitcodeAbbrevDistElement(const NaClBitcodeAbbrevDistElement&)
+ LLVM_DELETED_FUNCTION;
+ void operator=(const NaClBitcodeAbbrevDistElement&) LLVM_DELETED_FUNCTION;
+
+public:
+ static bool classof(const NaClBitcodeDistElement *Element) {
+ return Element->getKind() >= RDE_AbbrevDist &&
+ Element->getKind() < RDE_AbbrevDistLast;
+ }
+
+ explicit NaClBitcodeAbbrevDistElement(unsigned BlockID=0)
+ : NaClBitcodeDistElement(RDE_AbbrevDist),
+ CodeDist(BlockID, &NaClCompressCodeDistElement::Sentinel) {
+ NestedDists.push_back(&CodeDist);
+ }
+
+ // Sentinel to create instances of this.
+ static NaClBitcodeAbbrevDistElement Sentinel;
+
+ virtual ~NaClBitcodeAbbrevDistElement();
+
+ virtual NaClBitcodeDistElement *CreateElement(
+ NaClBitcodeDistValue Value) const;
+
+ virtual void GetValueList(const NaClBitcodeRecord &Record,
+ ValueListType &ValueList) const;
+
+ virtual void AddRecord(const NaClBitcodeRecord &Record);
+
+ virtual const char *GetTitle() const;
+
+ virtual const char *GetValueHeader() const;
+
+ virtual void PrintRowValue(raw_ostream &Stream,
+ NaClBitcodeDistValue Value,
+ const NaClBitcodeDist *Distribution) const;
+
+ virtual const SmallVectorImpl<NaClBitcodeDist*> *
+ GetNestedDistributions() const;
+
+ NaClBitcodeDist &GetCodeDist() {
+ return CodeDist;
+ }
+
+private:
+ // Nested blocks used by GetNestedDistributions.
+ SmallVector<NaClBitcodeDist*, 1> NestedDists;
+
+ /// The records associated with the given abbreviation.
+ NaClBitcodeCodeDist CodeDist;
+};
+
+/// Separates record codes based on abbreviations. This is done so
+/// that when we add abbreviations, they will be refinements of
+/// existing abbreviations. This should guarantee that we don't lose
+/// separation defined by previous iterations on calls to
+/// pnacl-bccompress.
+class NaClBitcodeAbbrevDist : public NaClBitcodeDist {
+public:
+ static bool classof(const NaClBitcodeDist *Dist) {
+ return Dist->getKind() >= RD_AbbrevDist &&
+ Dist->getKind() < RD_AbbrevDistLast;
+ }
+
+ explicit NaClBitcodeAbbrevDist(
+ unsigned BlockID,
+ NaClBitcodeAbbrevDistElement *Sentinel
+ = &NaClBitcodeAbbrevDistElement::Sentinel,
+ NaClBitcodeDistKind Kind=RD_AbbrevDist)
+ : NaClBitcodeDist(RecordStorage, Sentinel, Kind),
+ BlockID(BlockID) {
+ }
+
+ virtual ~NaClBitcodeAbbrevDist();
+
+ // Returns the block id associated with the abbreviations in this
+ // distribution map.
+ unsigned GetBlockID() const {
+ return BlockID;
+ }
+
+ virtual NaClBitcodeDistElement*
+ CreateElement(NaClBitcodeDistValue Value) const;
+
+private:
+ // The block id associated with the abbreviations in this
+ // distribution map.
+ unsigned BlockID;
+};
+
+}
+
+#endif
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