[LANG] Minor semantic changes (#121)

* Now using unordered instead of ordered float (fixes NaN issues)
* Bool -> int32 now converts to 1 rather than -1
* Reduce extend arguments to 32-bits if possible

lib/codegen/pass.cc

@@ -54,7 +54,6 @@ void add_passes_to_emit_bin(ir::module &ir, driver::device *dev, int num_warps,
   codegen::generator isel(&axes, &layouts, &align, &allocation, &swizzle, target.get(), num_warps);
   // run passes
   dce.run(ir);
-  //ir::print(ir, std::cout);
   peephole.run(ir);
   dce.run(ir);
   pipeline.run(ir);