build: instantiate generics

internal/llgen/llgen.go

@@ -63,7 +63,7 @@ func Gen(pkgPath, inFile string, src any) string {
 	pkg := types.NewPackage(pkgPath, name)
 	imp := packages.NewImporter(fset)
 	ssaPkg, _, err := ssautil.BuildPackage(
-		&types.Config{Importer: imp}, fset, pkg, files, ssa.SanityCheckFunctions)
+		&types.Config{Importer: imp}, fset, pkg, files, ssa.SanityCheckFunctions|ssa.InstantiateGenerics)
 	check(err)
 
 	if Verbose {

internal/llgen/llgenf.go

@@ -68,7 +68,7 @@ func GenFrom(fileOrPkg string) string {
 	initial, err := packages.LoadEx(nil, prog.TypeSizes, cfg, fileOrPkg)
 	check(err)
 
-	_, pkgs := ssautil.AllPackages(initial, ssa.SanityCheckFunctions)
+	_, pkgs := ssautil.AllPackages(initial, ssa.SanityCheckFunctions|ssa.InstantiateGenerics)
 
 	pkg := initial[0]
 	ssaPkg := pkgs[0]