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3ccc9d9f6a
This adds enough machinery to support reading simple GCC AutoFDO profiles. It now supports reading flat profiles (no function calls). Subsequent patches will add support for: - Inlined calls (in particular, the inline call stack is not traversed to accumulate samples). - Working sets and modules. These are used mostly for GCC's LIPO optimizations, so they're not needed in LLVM atm. I'm not sure that we will ever need them. For now, I've if0'd around the calls. The patch also adds support in GCOV.h for gcov version V704 (generated by GCC's profile conversion tool). llvm-svn: 247874
54 lines
1.8 KiB
C++
54 lines
1.8 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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case sampleprof_error::unrecognized_format:
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return "Unrecognized profile encoding format";
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case sampleprof_error::not_implemented:
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return "Unimplemented feature";
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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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