Remove FunctionType (#2510)

Function signatures were previously redundantly stored on Function
objects as well as on FunctionType objects. These two signature
representations had to always be kept in sync, which was error-prone
and needlessly complex. This PR takes advantage of the new ability of
Type to represent multiple value types by consolidating function
signatures as a pair of Types (params and results) stored on the
Function object.

Since there are no longer module-global named function types,
significant changes had to be made to the printing and emitting of
function types, as well as their parsing and manipulation in various
passes.

The C and JS APIs and their tests also had to be updated to remove
named function types.

1 files changed, 1 insertions, 2 deletions

diff --git a/test/binaryen.js/reloc.js b/test/binaryen.js/reloc.js
index 68c29228d..9666d17fd 100644
--- a/test/binaryen.js/reloc.js
+++ b/test/binaryen.js/reloc.js
@@ -16,8 +16,7 @@ module.setMemory(1, -1, null, [
 
 // table with offset
 
-var signature = module.addFunctionType("v", Binaryen.none, []);
-var func = module.addFunction("func", signature, [], module.nop());
+var func = module.addFunction("func", Binaryen.none, Binaryen.none, [], module.nop());
 
 module.addGlobalImport("table_base", "env", "table_base", Binaryen.i32, false);
 module.setFunctionTable(1, -1, [ "func", "func" ], module.global.get("table_base", Binaryen.i32));