mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Alessandro Di Federico
1429b526ab
This commit drops libptc in favor of its new form libtcg. It brings several improvements, among which: * The QEMU version we work on has been upgraded. * CPUStateAccessAnalysis has been reimplemented in a way that makes it easier to debug and solves some limitations (e.g., tracking leaking pointers). * Identification of pieces of the CPU state that are read by each helper and fixing access to the CPU state is now performed at build-time. * We no longer mmap the code we need to translate, dropping all the issues related to code that needed to be mapped where something is already present. * We now have two distinct flavors of helper modules: the full one and the "slim" one. The latter contains the definition only of functions we intend to inline. It is used in most of the pipeline, a good thing since we spend less time optimizing code we don't really care about. The full module is only used on the re-compilation branch of the pipeline. * We no longer split the `cpu_loop` function. * We change MetaAddress to rely on architectures from `model::` as opposed to the LLVM ones. * We no longer attach debug info to LLVM IR containing the original assembly. * We now verify that the lifted code only contains code we expect.
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
/// \file OriginalAssemblyAnnotationWriter.cpp
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/// This file handles debugging information generation.
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//
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// This file is distributed under the MIT License. See LICENSE.md for details.
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//
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/Support/FormattedStream.h"
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#include "revng/ADT/STLExtras.h"
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#include "revng/Model/FunctionTags.h"
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#include "revng/Recompile/OriginalAssemblyAnnotationWriter.h"
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#include "revng/Support/IRHelpers.h"
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using namespace llvm;
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/// Writes the text contained in the metadata with the specified kind ID to the
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/// output stream, unless that metadata is exactly the same as in the previous
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/// instruction.
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static void writeMetadataIfNew(const Instruction *I,
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unsigned MDKind,
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formatted_raw_ostream &Output,
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StringRef Prefix) {
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auto BeginIt = I->getParent()->begin();
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StringRef Text = getText(I, MDKind);
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if (Text.size()) {
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StringRef LastText;
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do {
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if (I->getIterator() == BeginIt) {
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I = nullptr;
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} else {
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I = I->getPrevNode();
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LastText = getText(I, MDKind);
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}
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} while (I != nullptr && LastText.size() == 0);
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if (I == nullptr or LastText != Text) {
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std::string TextToSerialize = Text.str();
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replaceAll(TextToSerialize, "\n", " ");
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Output << Prefix.data() << TextToSerialize << "\n";
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}
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}
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}
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using OAAW = OriginalAssemblyAnnotationWriter;
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void OAAW::emitInstructionAnnot(const Instruction *I,
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formatted_raw_ostream &Output) {
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// Ignore whatever is outside the root and the isolated functions
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writeMetadataIfNew(I, PTCInstrMDKind, Output, "\n ; ");
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if (isRootOrLifted(I->getParent()->getParent())) {
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}
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}
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