From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Wed, 21 May 2014 23:17:50 +0000 (+0000)
Subject: MC: introduce ability to restrict recorded relocations
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=159ccc8f51f7cb090058cfd0dcb64453f5681606;p=oota-llvm.git

MC: introduce ability to restrict recorded relocations

Add support to allow a target specific COFF object writer to restrict the
recorded resolutions in the emitted object files.  This is motivated by the need
in Windows on ARM, where an intermediate relocation needs to be prevented from
being emitted in the object file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209336 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/MC/MCWinCOFFObjectWriter.h b/include/llvm/MC/MCWinCOFFObjectWriter.h
index 213481c9090..dad7bb59703 100644
--- a/include/llvm/MC/MCWinCOFFObjectWriter.h
+++ b/include/llvm/MC/MCWinCOFFObjectWriter.h
@@ -30,6 +30,7 @@ namespace llvm {
     virtual unsigned getRelocType(const MCValue &Target,
                                   const MCFixup &Fixup,
                                   bool IsCrossSection) const = 0;
+    virtual bool recordRelocation(const MCFixup &) const { return true; }
   };
 
   /// \brief Construct a new Win COFF writer instance.
diff --git a/lib/MC/WinCOFFObjectWriter.cpp b/lib/MC/WinCOFFObjectWriter.cpp
index 2cc027bfa13..961cbc6a8f7 100644
--- a/lib/MC/WinCOFFObjectWriter.cpp
+++ b/lib/MC/WinCOFFObjectWriter.cpp
@@ -808,7 +808,8 @@ void WinCOFFObjectWriter::RecordRelocation(const MCAssembler &Asm,
     }
   }
 
-  coff_section->Relocations.push_back(Reloc);
+  if (TargetObjectWriter->recordRelocation(Fixup))
+    coff_section->Relocations.push_back(Reloc);
 }
 
 void WinCOFFObjectWriter::WriteObject(MCAssembler &Asm,