Begin work on instruction selection

Author: QuantumSegfault

llvm/lib/Target/WebAssembly/CMakeLists.txt

@@ -7,6 +7,7 @@ tablegen(LLVM WebAssemblyGenAsmWriter.inc -gen-asm-writer)
 tablegen(LLVM WebAssemblyGenDAGISel.inc -gen-dag-isel)
 tablegen(LLVM WebAssemblyGenDisassemblerTables.inc -gen-disassembler)
 tablegen(LLVM WebAssemblyGenFastISel.inc -gen-fast-isel)
+tablegen(LLVM WebAssemblyGenGlobalISel.inc -gen-global-isel)
 tablegen(LLVM WebAssemblyGenInstrInfo.inc -gen-instr-info)
 tablegen(LLVM WebAssemblyGenMCCodeEmitter.inc -gen-emitter)
 tablegen(LLVM WebAssemblyGenRegisterBank.inc -gen-register-bank)