xref: /freebsd/contrib/llvm-project/clang/lib/AST/Interp/Disasm.cpp (revision cfd6422a5217410fbd66f7a7a8a64d9d85e61229)
1 //===--- Disasm.cpp - Disassembler for bytecode functions -------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Dump method for Function which disassembles the bytecode.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "Function.h"
14 #include "Opcode.h"
15 #include "PrimType.h"
16 #include "Program.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "llvm/Support/Compiler.h"
19 #include "llvm/Support/Format.h"
20 
21 using namespace clang;
22 using namespace clang::interp;
23 
24 LLVM_DUMP_METHOD void Function::dump() const { dump(llvm::errs()); }
25 
26 LLVM_DUMP_METHOD void Function::dump(llvm::raw_ostream &OS) const {
27   if (F) {
28     if (auto *Cons = dyn_cast<CXXConstructorDecl>(F)) {
29       const std::string &Name = Cons->getParent()->getNameAsString();
30       OS << Name << "::" << Name << ":\n";
31     } else {
32       OS << F->getNameAsString() << ":\n";
33     }
34   } else {
35     OS << "<<expr>>\n";
36   }
37 
38   OS << "frame size: " << getFrameSize() << "\n";
39   OS << "arg size:   " << getArgSize() << "\n";
40   OS << "rvo:        " << hasRVO() << "\n";
41 
42   auto PrintName = [&OS](const char *Name) {
43     OS << Name;
44     for (long I = 0, N = strlen(Name); I < 30 - N; ++I) {
45       OS << ' ';
46     }
47   };
48 
49   for (CodePtr Start = getCodeBegin(), PC = Start; PC != getCodeEnd();) {
50     size_t Addr = PC - Start;
51     auto Op = PC.read<Opcode>();
52     OS << llvm::format("%8d", Addr) << " ";
53     switch (Op) {
54 #define GET_DISASM
55 #include "Opcodes.inc"
56 #undef GET_DISASM
57     }
58   }
59 }
60 
61 LLVM_DUMP_METHOD void Program::dump() const { dump(llvm::errs()); }
62 
63 LLVM_DUMP_METHOD void Program::dump(llvm::raw_ostream &OS) const {
64   for (auto &Func : Funcs) {
65     Func.second->dump();
66   }
67   for (auto &Anon : AnonFuncs) {
68     Anon->dump();
69   }
70 }
71