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9a9dc02678
Support a new assembler directive, .import_global, to declare imported global variables (i.e. those with external linkage and no initializer). The linker turns these into wasm imports. Patch by Jacob Gravelle Differential Revision: https://reviews.llvm.org/D26875 llvm-svn: 288296
89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
//==-- WebAssemblyTargetStreamer.h - WebAssembly Target Streamer -*- C++ -*-==//
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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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/// \file
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/// \brief This file declares WebAssembly-specific target streamer classes.
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/// These are for implementing support for target-specific assembly directives.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H
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#include "llvm/CodeGen/MachineValueType.h"
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#include "llvm/MC/MCStreamer.h"
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namespace llvm {
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class MCELFStreamer;
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/// WebAssembly-specific streamer interface, to implement support
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/// WebAssembly-specific assembly directives.
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class WebAssemblyTargetStreamer : public MCTargetStreamer {
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public:
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explicit WebAssemblyTargetStreamer(MCStreamer &S);
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/// .param
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virtual void emitParam(ArrayRef<MVT> Types) = 0;
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/// .result
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virtual void emitResult(ArrayRef<MVT> Types) = 0;
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/// .local
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virtual void emitLocal(ArrayRef<MVT> Types) = 0;
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/// .endfunc
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virtual void emitEndFunc() = 0;
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/// .functype
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virtual void emitIndirectFunctionType(StringRef name,
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SmallVectorImpl<MVT> &Params,
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SmallVectorImpl<MVT> &Results) {
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llvm_unreachable("emitIndirectFunctionType not implemented");
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}
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/// .indidx
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virtual void emitIndIdx(const MCExpr *Value) = 0;
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/// .import_global
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virtual void emitGlobalImport(StringRef name) = 0;
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};
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/// This part is for ascii assembly output
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class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer {
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formatted_raw_ostream &OS;
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public:
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WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
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void emitParam(ArrayRef<MVT> Types) override;
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void emitResult(ArrayRef<MVT> Types) override;
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void emitLocal(ArrayRef<MVT> Types) override;
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void emitEndFunc() override;
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void emitIndirectFunctionType(StringRef name,
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SmallVectorImpl<MVT> &Params,
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SmallVectorImpl<MVT> &Results) override;
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void emitIndIdx(const MCExpr *Value) override;
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void emitGlobalImport(StringRef name) override;
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};
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/// This part is for ELF object output
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class WebAssemblyTargetELFStreamer final : public WebAssemblyTargetStreamer {
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public:
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explicit WebAssemblyTargetELFStreamer(MCStreamer &S);
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void emitParam(ArrayRef<MVT> Types) override;
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void emitResult(ArrayRef<MVT> Types) override;
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void emitLocal(ArrayRef<MVT> Types) override;
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void emitEndFunc() override;
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void emitIndirectFunctionType(StringRef name,
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SmallVectorImpl<MVT> &Params,
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SmallVectorImpl<MVT> &Results) override;
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void emitIndIdx(const MCExpr *Value) override;
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void emitGlobalImport(StringRef name) override;
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};
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} // end namespace llvm
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#endif
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