1 //==-- WebAssemblyTargetStreamer.h - WebAssembly Target Streamer -*- C++ -*-==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief This file declares WebAssembly-specific target streamer classes.
12 /// These are for implementing support for target-specific assembly directives.
13 ///
14 //===----------------------------------------------------------------------===//
15 
16 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
17 #define LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
18 
19 #include "llvm/CodeGen/MachineValueType.h"
20 #include "llvm/MC/MCStreamer.h"
21 
22 namespace llvm {
23 
24 class MCELFStreamer;
25 
26 /// WebAssembly-specific streamer interface, to implement support
27 /// WebAssembly-specific assembly directives.
28 class WebAssemblyTargetStreamer : public MCTargetStreamer {
29 public:
30   explicit WebAssemblyTargetStreamer(MCStreamer &S);
31 
32   /// .param
33   virtual void emitParam(ArrayRef<MVT> Types) = 0;
34   /// .result
35   virtual void emitResult(ArrayRef<MVT> Types) = 0;
36   /// .local
37   virtual void emitLocal(ArrayRef<MVT> Types) = 0;
38   /// .endfunc
39   virtual void emitEndFunc() = 0;
40   /// .functype
emitIndirectFunctionType(StringRef name,SmallVectorImpl<MVT> & SignatureVTs,size_t NumResults)41   virtual void emitIndirectFunctionType(StringRef name,
42                                         SmallVectorImpl<MVT> &SignatureVTs,
43                                         size_t NumResults) {
44     llvm_unreachable("emitIndirectFunctionType not implemented");
45   }
46 };
47 
48 /// This part is for ascii assembly output
49 class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer {
50   formatted_raw_ostream &OS;
51 
52 public:
53   WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
54 
55   void emitParam(ArrayRef<MVT> Types) override;
56   void emitResult(ArrayRef<MVT> Types) override;
57   void emitLocal(ArrayRef<MVT> Types) override;
58   void emitEndFunc() override;
59   void emitIndirectFunctionType(StringRef name,
60                                 SmallVectorImpl<MVT> &SignatureVTs,
61                                 size_t NumResults) override;
62 };
63 
64 /// This part is for ELF object output
65 class WebAssemblyTargetELFStreamer final : public WebAssemblyTargetStreamer {
66 public:
67   explicit WebAssemblyTargetELFStreamer(MCStreamer &S);
68 
69   void emitParam(ArrayRef<MVT> Types) override;
70   void emitResult(ArrayRef<MVT> Types) override;
71   void emitLocal(ArrayRef<MVT> Types) override;
72   void emitEndFunc() override;
73 };
74 
75 } // end namespace llvm
76 
77 #endif
78