[llvm] 85c779d - [llc] -filetype=null: don't create .null if -o is not specified

[Fangrui Song via llvm-commits]

Author: Fangrui Song
Date: 2020-10-12T17:28:59-07:00
New Revision: 85c779d256207fe82ba876d19724c497ee904be7

URL: https://github.com/llvm/llvm-project/commit/85c779d256207fe82ba876d19724c497ee904be7
DIFF: https://github.com/llvm/llvm-project/commit/85c779d256207fe82ba876d19724c497ee904be7.diff

LOG: [llc] -filetype=null: don't create .null if -o is not specified

The new behavior is consistent with llvm-mc -filetype=null.

Added: 
    

Modified: 
    llvm/test/CodeGen/X86/null-streamer.ll
    llvm/tools/llc/llc.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/test/CodeGen/X86/null-streamer.ll b/llvm/test/CodeGen/X86/null-streamer.ll
index 28a457f64d4a..3d5f682f75c2 100644
--- a/llvm/test/CodeGen/X86/null-streamer.ll
+++ b/llvm/test/CodeGen/X86/null-streamer.ll
@@ -1,7 +1,8 @@
 ; Check the MCNullStreamer operates correctly, at least on a minimal test case.
 ;
+; RUN: rm -f %t
 ; RUN: llc -filetype=null -o %t -mtriple=i686-- %s
-; RUN: llc -filetype=null -o %t -mtriple=i686-cygwin %s
+; RUN: ls %t
 
 source_filename = "test/CodeGen/X86/null-streamer.ll"
 

diff  --git a/llvm/tools/llc/llc.cpp b/llvm/tools/llc/llc.cpp
index 98a2735887c0..b58e8486db8c 100644
--- a/llvm/tools/llc/llc.cpp
+++ b/llvm/tools/llc/llc.cpp
@@ -224,7 +224,7 @@ static std::unique_ptr<ToolOutputFile> GetOutputStream(const char *TargetName,
           OutputFilename += ".o";
         break;
       case CGFT_Null:
-        OutputFilename += ".null";
+        OutputFilename = "-";
         break;
       }
     }