[wasm-split] Minimize non-function export names (#6951)

The module splitting utility has a configuration option for minimizing
new export names, but it was previously applied only to newly exported
functions. Using the new multi-split mode can produce lots of exported
tables and splitting WasmGC programs can produce lots of exported
globals, so minimizing these export names can have a big impact on code
size.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/ir/module-splitting.cpp b/src/ir/module-splitting.cpp
index caa996b30..f299d7a35 100644
--- a/src/ir/module-splitting.cpp
+++ b/src/ir/module-splitting.cpp
@@ -826,8 +826,11 @@ void ModuleSplitter::shareImportableItems() {
     if (exportIt != exports.end()) {
       secondaryItem.base = exportIt->second;
     } else {
-      Name exportName = Names::getValidExportName(
-        primary, config.newExportPrefix + genericExportName);
+      std::string baseName =
+        config.newExportPrefix + (config.minimizeNewExportNames
+                                    ? minified.getName()
+                                    : genericExportName);
+      Name exportName = Names::getValidExportName(primary, baseName);
       primary.addExport(new Export{exportName, primaryItem.name, kind});
       secondaryItem.base = exportName;
     }