Refactor and optimize binary writing type collection (#2478)

Create a new ParallelFunctionAnalysis helper, which lets us
run in parallel on all functions and collect info from them,
without manually handling locks etc.

Use that in the binary writing code's type collection logic,
avoiding a lock for each type increment.

Also add Signature printing which was useful to debug this.

1 files changed, 5 insertions, 4 deletions

diff --git a/src/wasm-type.h b/src/wasm-type.h
index 7b3845aec..ddfb7c9a1 100644
--- a/src/wasm-type.h
+++ b/src/wasm-type.h
@@ -96,10 +96,6 @@ struct ResultType {
   std::string toString() const;
 };
 
-std::ostream& operator<<(std::ostream& os, Type t);
-std::ostream& operator<<(std::ostream& os, ParamType t);
-std::ostream& operator<<(std::ostream& os, ResultType t);
-
 struct Signature {
   Type params;
   Type results;
@@ -112,6 +108,11 @@ struct Signature {
   bool operator<(const Signature& other) const;
 };
 
+std::ostream& operator<<(std::ostream& os, Type t);
+std::ostream& operator<<(std::ostream& os, ParamType t);
+std::ostream& operator<<(std::ostream& os, ResultType t);
+std::ostream& operator<<(std::ostream& os, Signature t);
+
 constexpr Type none = Type::none;
 constexpr Type i32 = Type::i32;
 constexpr Type i64 = Type::i64;