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e75c2b3e54
Summary: This patch finishes up support for handling sampling profiles in both text and binary formats. The new binary format uses uleb128 encoding to represent numeric values. This makes profiles files about 25% smaller. The profile writer class can write profiles in the existing text and the new binary format. In subsequent patches, I will add the capability to read (and perhaps write) profiles in the gcov format used by GCC. Additionally, I will be adding support in llvm-profdata to manipulate sampling profiles. There was a bit of refactoring needed to separate some code that was in the reader files, but is actually common to both the reader and writer. The new test checks that reading the same profile encoded as text or raw, produces the same results. Reviewers: bogner, dexonsmith Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D6000 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220915 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
//=-- SampleProf.cpp - Sample profiling format support --------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains common definitions used in the reading and writing of
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// sample profile data.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ProfileData/SampleProf.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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using namespace llvm;
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namespace {
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class SampleProfErrorCategoryType : public std::error_category {
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const char *name() const LLVM_NOEXCEPT override { return "llvm.sampleprof"; }
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std::string message(int IE) const override {
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sampleprof_error E = static_cast<sampleprof_error>(IE);
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switch (E) {
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case sampleprof_error::success:
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return "Success";
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case sampleprof_error::bad_magic:
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return "Invalid file format (bad magic)";
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case sampleprof_error::unsupported_version:
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return "Unsupported format version";
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case sampleprof_error::too_large:
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return "Too much profile data";
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case sampleprof_error::truncated:
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return "Truncated profile data";
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case sampleprof_error::malformed:
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return "Malformed profile data";
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}
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llvm_unreachable("A value of sampleprof_error has no message.");
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}
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};
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}
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static ManagedStatic<SampleProfErrorCategoryType> ErrorCategory;
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const std::error_category &llvm::sampleprof_category() {
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return *ErrorCategory;
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}
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