[NFC][wasm] Fix incorrect comment about reserved low addresses

Author: kateinoigakukun

lib/Driver/WebAssemblyToolChains.cpp

@@ -188,8 +188,8 @@ toolchains::WebAssembly::constructInvocation(const DynamicLinkJobAction &job,
 
   // WebAssembly doesn't reserve low addresses But without "extra inhabitants"
   // of the pointer representation, runtime performance and memory footprint are
-  // worse. So assume that compiler driver uses wasm-ld and --global-base=1024
-  // to reserve low 1KB.
+  // worse. So assume that compiler driver uses wasm-ld and --global-base=4096
+  // to reserve low 4KB.
   Arguments.push_back("-Xlinker");
   Arguments.push_back(context.Args.MakeArgString(
       Twine("--global-base=") +

stdlib/public/SwiftShims/swift/shims/System.h

@@ -220,8 +220,8 @@
 
 // WebAssembly doesn't reserve low addresses. But without "extra inhabitants" of
 // the pointer representation, runtime performance and memory footprint are
-// worse. So assume that compiler driver uses wasm-ld and --global-base=1024 to
-// reserve low 1KB.
+// worse. So assume that compiler driver uses wasm-ld and --global-base=4096 to
+// reserve low 4KB.
 #define SWIFT_ABI_WASM32_LEAST_VALID_POINTER 4096
 
 #endif // SWIFT_STDLIB_SHIMS_ABI_SYSTEM_H