[gn] port 6d03f51f0c59
diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni b/llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni
index b693b75..ba15107 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni
@@ -55,6 +55,7 @@
   "divti3.c",
   "extendhfsf2.c",
   "extendsfdf2.c",
+  "extendhfdf2.c",
   "ffsdi2.c",
   "ffssi2.c",
   "ffsti2.c",