[llvm-nm] Write "no symbol" output to stderr

This matches the output of binutils' nm and ensures that any scripts
or tools that use nm and expect empty output in case there no symbols
don't break.

Differential Revision: https://reviews.llvm.org/D52943

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@343887 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/thinlto_backend.ll b/test/CodeGen/thinlto_backend.ll
index be7a6feeb98d74fb5a9801709520a8e3da3905c5..2dd919d5f7de4fcf0af663a72f6464dba1d4a9e1 100644 (file)
--- a/test/CodeGen/thinlto_backend.ll
+++ b/test/CodeGen/thinlto_backend.ll
@@ -25,7 +25,7 @@
 ; be empty file.
 ; RUN: opt -o %t5.o %s
 ; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t4.o -x ir %t5.o -c -fthinlto-index=%t.thinlto.bc
-; RUN: llvm-nm %t4.o | FileCheck %s -check-prefix=NO-SYMBOLS
+; RUN: llvm-nm %t4.o 2>&1 | FileCheck %s -check-prefix=NO-SYMBOLS
 ; NO-SYMBOLS: no symbols
 
 ; Ensure f2 was imported. Check for all 3 flavors of -save-temps[=cwd|obj].