| 1 | //===- Trace.cpp - Implementation of Trace class --------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This class represents a single trace of LLVM basic blocks. A trace is a |
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| 10 | // single entry, multiple exit, region of code that is often hot. Trace-based |
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| 11 | // optimizations treat traces almost like they are a large, strange, basic |
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| 12 | // block: because the trace path is assumed to be hot, optimizations for the |
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| 13 | // fall-through path are made at the expense of the non-fall-through paths. |
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| 14 | // |
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| 15 | //===----------------------------------------------------------------------===// |
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| 16 | |
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| 17 | #include "llvm/Analysis/Trace.h" |
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| 18 | #include "llvm/Config/llvm-config.h" |
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| 19 | #include "llvm/IR/BasicBlock.h" |
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| 20 | #include "llvm/IR/Function.h" |
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| 21 | #include "llvm/Support/Compiler.h" |
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| 22 | #include "llvm/Support/Debug.h" |
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| 23 | #include "llvm/Support/raw_ostream.h" |
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| 24 | |
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| 25 | using namespace llvm; |
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| 26 | |
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| 27 | Function *Trace::getFunction() const { |
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| 28 | return getEntryBasicBlock()->getParent(); |
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| 29 | } |
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| 30 | |
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| 31 | Module *Trace::getModule() const { |
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| 32 | return getFunction()->getParent(); |
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| 33 | } |
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| 34 | |
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| 35 | /// print - Write trace to output stream. |
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| 36 | void Trace::print(raw_ostream &O) const { |
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| 37 | Function *F = getFunction(); |
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| 38 | O << "; Trace from function " << F->getName() << ", blocks:\n" ; |
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| 39 | for (const_iterator i = begin(), e = end(); i != e; ++i) { |
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| 40 | O << "; " ; |
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| 41 | (*i)->printAsOperand(O, PrintType: true, M: getModule()); |
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| 42 | O << "\n" ; |
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| 43 | } |
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| 44 | O << "; Trace parent function: \n" << *F; |
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| 45 | } |
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| 46 | |
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| 47 | #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) |
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| 48 | /// dump - Debugger convenience method; writes trace to standard error |
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| 49 | /// output stream. |
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| 50 | LLVM_DUMP_METHOD void Trace::dump() const { |
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| 51 | print(O&: dbgs()); |
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| 52 | } |
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| 53 | #endif |
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| 54 | |
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