From 2841eddaabc7a5e24517e043a1aab8adc6d5c1e4 Mon Sep 17 00:00:00 2001
From: Daniel Wirtz <dcode@dcode.io>
Date: Thu, 17 Sep 2020 12:58:21 +0200
Subject: Refactor Host expression to MemorySize and MemoryGrow (#3137)

Aligns the internal representations of `memory.size` and `memory.grow` with other more recent memory instructions by removing the legacy `Host` expression class and adding separate expression classes for `MemorySize` and `MemoryGrow`. Simplifies related APIs, but is also a breaking API change.
---
 src/passes/RemoveUnusedModuleElements.cpp | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

(limited to 'src/passes/RemoveUnusedModuleElements.cpp')

diff --git a/src/passes/RemoveUnusedModuleElements.cpp b/src/passes/RemoveUnusedModuleElements.cpp
index 21cbc5e5b..3795022c2 100644
--- a/src/passes/RemoveUnusedModuleElements.cpp
+++ b/src/passes/RemoveUnusedModuleElements.cpp
@@ -111,11 +111,8 @@ struct ReachabilityAnalyzer : public PostWalker<ReachabilityAnalyzer> {
   void visitDataDrop(DataDrop* curr) { usesMemory = true; }
   void visitMemoryCopy(MemoryCopy* curr) { usesMemory = true; }
   void visitMemoryFill(MemoryFill* curr) { usesMemory = true; }
-  void visitHost(Host* curr) {
-    if (curr->op == MemorySize || curr->op == MemoryGrow) {
-      usesMemory = true;
-    }
-  }
+  void visitMemorySize(MemorySize* curr) { usesMemory = true; }
+  void visitMemoryGrow(MemoryGrow* curr) { usesMemory = true; }
   void visitRefFunc(RefFunc* curr) {
     if (reachable.count(
           ModuleElement(ModuleElementKind::Function, curr->func)) == 0) {
-- 
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