From: David L. Jones <dlj@google.com>
Date: Thu, 18 Feb 2016 20:27:16 +0000 (+0000)
Subject: Use Backend_EmitMCNull for null codegen unit tests.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ff3db8fcd6594e1c720e940f83422928b8c9e1c2;p=clang

Use Backend_EmitMCNull for null codegen unit tests.

Using Backend_EmitLL attemps to create a file with an empty filename.
This is problematic in certain environments: an empty filename may be
illegal, or the default output path may not be writable (in the case
where an empty filename would otherwise have some non-failing
semantics). This patch switches to use Backend_EmitMCNull, which
allows CodeGen to run, but does not attempt to create or write an
output file.

Differential Revision: http://reviews.llvm.org/D17405

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@261252 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/unittests/Frontend/CodeGenActionTest.cpp b/unittests/Frontend/CodeGenActionTest.cpp
index 3ff6c4eb40..71446fd4d7 100644
--- a/unittests/Frontend/CodeGenActionTest.cpp
+++ b/unittests/Frontend/CodeGenActionTest.cpp
@@ -26,7 +26,7 @@ namespace {
 class NullCodeGenAction : public CodeGenAction {
 public:
   NullCodeGenAction(llvm::LLVMContext *_VMContext = nullptr)
-    : CodeGenAction(Backend_EmitLL, _VMContext) {}
+    : CodeGenAction(Backend_EmitMCNull, _VMContext) {}
 
   // The action does not call methods of ATContext.
   void ExecuteAction() override {