[lld] r264089 - [lto] Provide a file name for the combined LTO object.

[Sean Silva via llvm-commits]

Author: silvas
Date: Tue Mar 22 15:25:32 2016
New Revision: 264089

URL: http://llvm.org/viewvc/llvm-project?rev=264089&view=rev
Log:
[lto] Provide a file name for the combined LTO object.

Otherwise, we get diagnostics like:

    undefined symbol: foo in

Which isn't particularly useful.

Added:
    lld/trunk/test/ELF/lto/combined-lto-object-name.ll
Modified:
    lld/trunk/ELF/SymbolTable.cpp

Modified: lld/trunk/ELF/SymbolTable.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/SymbolTable.cpp?rev=264089&r1=264088&r2=264089&view=diff
==============================================================================
--- lld/trunk/ELF/SymbolTable.cpp (original)
+++ lld/trunk/ELF/SymbolTable.cpp Tue Mar 22 15:25:32 2016
@@ -168,7 +168,8 @@ std::unique_ptr<InputFile> SymbolTable<E
                               TargetMachine::CGFT_ObjectFile))
     fatal("failed to setup codegen");
   CodeGenPasses.run(M);
-  LtoBuffer = MemoryBuffer::getMemBuffer(OwningLTOData, "", false);
+  LtoBuffer = MemoryBuffer::getMemBuffer(
+      OwningLTOData, "LLD-INTERNAL-combined-lto-object", false);
   if (Config->SaveTemps)
     saveLtoObjectFile(LtoBuffer->getBuffer());
   return createObjectFile(*LtoBuffer);

Added: lld/trunk/test/ELF/lto/combined-lto-object-name.ll
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/lto/combined-lto-object-name.ll?rev=264089&view=auto
==============================================================================
--- lld/trunk/test/ELF/lto/combined-lto-object-name.ll (added)
+++ lld/trunk/test/ELF/lto/combined-lto-object-name.ll Tue Mar 22 15:25:32 2016
@@ -0,0 +1,14 @@
+; REQUIRES: x86
+; RUN: llvm-as %s -o %t.o
+; RUN: not ld.lld -m elf_x86_64 %t.o -o %t2 2>&1 | FileCheck %s
+
+target triple = "x86_64-unknown-linux-gnu"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+declare void @foo()
+define void @_start() {
+  call void @foo()
+  ret void
+}
+
+; CHECK: undefined symbol: foo in LLD-INTERNAL-combined-lto-object