[WebAssembly] Add skeleton MC support for the Wasm container format

This just adds the basic skeleton for supporting a new object file format.
All of the actual encoding will be implemented in followup patches.

Differential Revision: https://reviews.llvm.org/D26722

llvm-svn: 295803

1 files changed, 8 insertions, 2 deletions

diff --git a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp
index 7edf54037d3..9ccaf433b5d 100644
--- a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp
+++ b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp
@@ -36,6 +36,8 @@ using namespace llvm;
 
 static MCAsmInfo *createMCAsmInfo(const MCRegisterInfo & /*MRI*/,
                                   const Triple &TT) {
+  if (TT.isOSBinFormatELF())
+    return new WebAssemblyMCAsmInfoELF(TT);
   return new WebAssemblyMCAsmInfo(TT);
 }
 
@@ -88,8 +90,12 @@ static MCSubtargetInfo *createMCSubtargetInfo(const Triple &TT, StringRef CPU,
 }
 
 static MCTargetStreamer *
-createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo & /*STI*/) {
-  return new WebAssemblyTargetELFStreamer(S);
+createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
+  const Triple &TT = STI.getTargetTriple();
+  if (TT.isOSBinFormatELF())
+    return new WebAssemblyTargetELFStreamer(S);
+
+  return new WebAssemblyTargetWasmStreamer(S);
 }
 
 static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S,