asm2wasm atomics (#1171)

* translate asm.js atomics into wasm atomics

* fix wasm-builder atomic load emitting, the alignment is the loaded size, not the output size

* don't require code for each node type in vaccuum, for non-mentioned nodes, assume we can't optimize them out

* support atomics in hashing, comparing, and copying

1 files changed, 6 insertions, 0 deletions

diff --git a/src/ast/ExpressionManipulator.cpp b/src/ast/ExpressionManipulator.cpp
index cca799e10..f5b303488 100644
--- a/src/ast/ExpressionManipulator.cpp
+++ b/src/ast/ExpressionManipulator.cpp
@@ -117,6 +117,12 @@ Expression* flexibleCopy(Expression* original, Module& wasm, CustomCopier custom
 				       copy(curr->ptr), copy(curr->expected), copy(curr->replacement),
 				       curr->type);
     }
+    Expression* visitAtomicWait(AtomicWait* curr) {
+      return builder.makeAtomicWait(copy(curr->ptr), copy(curr->expected), copy(curr->timeout), curr->type);
+    }
+    Expression* visitAtomicWake(AtomicWake* curr) {
+      return builder.makeAtomicWake(copy(curr->ptr), copy(curr->wakeCount));
+    }
     Expression* visitConst(Const *curr) {
       return builder.makeConst(curr->value);
     }