Add Atomic instructions (#633)

This adds support for all atomic instructions, enabled via the
`--enable-threads` flag.

It supports all tools: parsing text, decoding binary, validation, and
interpreting. It does not currently ensure that the memory is marked as
shared; that flag is not supported in wabt yet.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/expr-visitor.cc b/src/expr-visitor.cc
index 9d0d211d..8975a43d 100644
--- a/src/expr-visitor.cc
+++ b/src/expr-visitor.cc
@@ -25,6 +25,23 @@ ExprVisitor::ExprVisitor(Delegate* delegate) : delegate_(delegate) {}
 
 Result ExprVisitor::VisitExpr(Expr* expr) {
   switch (expr->type()) {
+    case ExprType::AtomicLoad:
+      CHECK_RESULT(delegate_->OnAtomicLoadExpr(cast<AtomicLoadExpr>(expr)));
+      break;
+
+    case ExprType::AtomicStore:
+      CHECK_RESULT(delegate_->OnAtomicStoreExpr(cast<AtomicStoreExpr>(expr)));
+      break;
+
+    case ExprType::AtomicRmw:
+      CHECK_RESULT(delegate_->OnAtomicRmwExpr(cast<AtomicRmwExpr>(expr)));
+      break;
+
+    case ExprType::AtomicRmwCmpxchg:
+      CHECK_RESULT(
+          delegate_->OnAtomicRmwCmpxchgExpr(cast<AtomicRmwCmpxchgExpr>(expr)));
+      break;
+
     case ExprType::Binary:
       CHECK_RESULT(delegate_->OnBinaryExpr(cast<BinaryExpr>(expr)));
       break;