[WebAssembly] Use __stack_pointer global when writing wasm binary

This ensures that symbolic relocations are generated for stack
pointer manipulations.

These relocations are of type R_WEBASSEMBLY_GLOBAL_INDEX_LEB.
This change also adds support for reading relocations of this
type in WasmObjectFile.cpp.

Since its a globally imported symbol this does mean that
the get_global/set_global instruction won't be valid until
the objects are linked that global used in no longer an
imported global.

Differential Revision: https://reviews.llvm.org/D34172

llvm-svn: 305616

1 files changed, 0 insertions, 7 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
index b999091e2d2..f51585a10ca 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
@@ -96,13 +96,6 @@ void WebAssemblyAsmPrinter::EmitEndOfAsmFile(Module &M) {
                                MCConstantExpr::create(Size, OutContext));
     }
   }
-
-  if (!TM.getTargetTriple().isOSBinFormatELF()) {
-    MachineModuleInfoWasm &MMIW = MMI->getObjFileInfo<MachineModuleInfoWasm>();
-    getTargetStreamer()->emitGlobal(MMIW.getGlobals());
-    if (MMIW.hasStackPointerGlobal())
-      getTargetStreamer()->emitStackPointer(MMIW.getStackPointerGlobal());
-  }
 }
 
 void WebAssemblyAsmPrinter::EmitConstantPool() {