Fix memory size calculation in MemoryPacking (#2548)

Because `memory.size` returns the size in number of pages, we have to
multiply the size with the page size when converting `memory.init`.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/passes/MemoryPacking.cpp b/src/passes/MemoryPacking.cpp
index 18207026a..98c7cce00 100644
--- a/src/passes/MemoryPacking.cpp
+++ b/src/passes/MemoryPacking.cpp
@@ -140,7 +140,12 @@ struct MemoryPacking : public Pass {
             builder.makeBinary(
               OrInt32,
               builder.makeBinary(
-                GtUInt32, curr->dest, builder.makeHost(MemorySize, Name(), {})),
+                GtUInt32,
+                curr->dest,
+                builder.makeBinary(
+                  MulInt32,
+                  builder.makeConst(Literal(Memory::kPageSize)),
+                  builder.makeHost(MemorySize, Name(), {}))),
               builder.makeBinary(OrInt32, curr->offset, curr->size)),
             builder.makeUnreachable()));
           changed = true;