[LLVMdev] [llvm-commits][PATHCH] Bug 12530 - llvm-link dropping debug-information for local

[Jaemin Park]

When linking .ll files with llvm-link or llvm-ld, the debug information is
corrupted. 

As my investigation, alloca instruction, used to hold the debug
information, nullifies the debug meta information 

The attachments is the patch for it. 

 

Index: lib/Transforms/Utils/ValueMapper.cpp

===================================================================

--- lib/Transforms/Utils/ValueMapper.cpp        (revision 157974)

+++ lib/Transforms/Utils/ValueMapper.cpp        (working copy)

@@ -85,6 +85,10 @@

     // No operands needed remapping.  Use an identity mapping.

     return const_cast<Value*>(V);

   }

+

+  // Alloca instruction is used to identify the holding information in
llvm.dbg.declare

+  if (isa<AllocaInst>(V))

+    return const_cast<Value*>(V);

 

   // Okay, this either must be a constant (which may or may not be
mappable) or

   // is something that is not in the mapping table.

 

Sincerely yours,

Jaemin Park

 

 

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