From c5084cccc807b95d959eb73a9429150c6520661c Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Fri, 19 Mar 2010 09:29:03 +0000
Subject: MC: Add TargetAsmBackend::isVirtualSection hook.

llvm-svn: 98950
---
 llvm/lib/Target/X86/X86AsmBackend.cpp | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/Target/X86/X86AsmBackend.cpp')

diff --git a/llvm/lib/Target/X86/X86AsmBackend.cpp b/llvm/lib/Target/X86/X86AsmBackend.cpp
index fec563817e6..1d66b841523 100644
--- a/llvm/lib/Target/X86/X86AsmBackend.cpp
+++ b/llvm/lib/Target/X86/X86AsmBackend.cpp
@@ -11,6 +11,7 @@
 #include "X86.h"
 #include "X86FixupKinds.h"
 #include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCSectionELF.h"
 #include "llvm/MC/MCSectionMachO.h"
 #include "llvm/Target/TargetRegistry.h"
 #include "llvm/Target/TargetAsmBackend.h"
@@ -48,6 +49,20 @@ public:
   }
 };
 
+class ELFX86AsmBackend : public X86AsmBackend {
+public:
+  ELFX86AsmBackend(const Target &T)
+    : X86AsmBackend(T) {
+    HasAbsolutizedSet = true;
+    HasScatteredSymbols = true;
+  }
+
+  bool isVirtualSection(const MCSection &Section) const {
+    const MCSectionELF &SE = static_cast<const MCSectionELF&>(Section);
+    return SE.getType() == MCSectionELF::SHT_NOBITS;;
+  }
+};
+
 class DarwinX86AsmBackend : public X86AsmBackend {
 public:
   DarwinX86AsmBackend(const Target &T)
@@ -55,6 +70,12 @@ public:
     HasAbsolutizedSet = true;
     HasScatteredSymbols = true;
   }
+
+  bool isVirtualSection(const MCSection &Section) const {
+    const MCSectionMachO &SMO = static_cast<const MCSectionMachO&>(Section);
+    return (SMO.getType() == MCSectionMachO::S_ZEROFILL ||
+            SMO.getType() == MCSectionMachO::S_GB_ZEROFILL);
+  }
 };
 
 class DarwinX86_32AsmBackend : public DarwinX86AsmBackend {
@@ -92,7 +113,7 @@ TargetAsmBackend *llvm::createX86_32AsmBackend(const Target &T,
   case Triple::Darwin:
     return new DarwinX86_32AsmBackend(T);
   default:
-    return new X86AsmBackend(T);
+    return new ELFX86AsmBackend(T);
   }
 }
 
@@ -102,6 +123,6 @@ TargetAsmBackend *llvm::createX86_64AsmBackend(const Target &T,
   case Triple::Darwin:
     return new DarwinX86_64AsmBackend(T);
   default:
-    return new X86AsmBackend(T);
+    return new ELFX86AsmBackend(T);
   }
 }
-- 
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