Subzero - WASM: Codegen fixes, better test infrastructure

runtime/wasm-runtime.cpp

+//===- subzero/runtime/wasm-runtime.cpp - Subzero WASM runtime source -----===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the system calls required by the libc that is included
+// in WebAssembly programs.
+//
+//===----------------------------------------------------------------------===//
+
+// TODO (eholk): port wasm-runtime.c into this file, using C++ name mangling.

[John, 2016/04/20 19:18:13]

for the time being, why don't you move the contents in that file to this one?
you can even try the change by doing

extern "C" {
#include "wasm-runtime.c"
}

[Eric Holk, 2016/04/20 19:51:57]

Done.

+
+#include <cmath>
+
+namespace env {
+double floor(double X) { return std::floor(X); }
+
+float floor(float X) { return std::floor(X); }
+}