Add a MCObjectFormat class so that code common to all targets that use a

single object format can be shared.

This also adds support for

mov zed+(bar-foo), %eax

on ELF and COFF targets.

llvm-svn: 116675

1 files changed, 19 insertions, 2 deletions

diff --git a/llvm/lib/Target/X86/X86AsmBackend.cpp b/llvm/lib/Target/X86/X86AsmBackend.cpp
index e641500abfb..853d3ed159f 100644
--- a/llvm/lib/Target/X86/X86AsmBackend.cpp
+++ b/llvm/lib/Target/X86/X86AsmBackend.cpp
@@ -14,6 +14,7 @@
 #include "llvm/MC/ELFObjectWriter.h"
 #include "llvm/MC/MCAssembler.h"
 #include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectFormat.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/MC/MCSectionCOFF.h"
 #include "llvm/MC/MCSectionELF.h"
@@ -186,15 +187,20 @@ bool X86AsmBackend::WriteNopData(uint64_t Count, MCObjectWriter *OW) const {
 
 namespace {
 class ELFX86AsmBackend : public X86AsmBackend {
+  MCELFObjectFormat Format;
+
 public:
   Triple::OSType OSType;
   ELFX86AsmBackend(const Target &T, Triple::OSType _OSType)
     : X86AsmBackend(T), OSType(_OSType) {
-    HasAbsolutizedSet = true;
     HasScatteredSymbols = true;
     HasReliableSymbolDifference = true;
   }
 
+  virtual const MCObjectFormat &getObjectFormat() const {
+    return Format;
+  }
+
   virtual bool doesSectionRequireSymbols(const MCSection &Section) const {
     const MCSectionELF &ES = static_cast<const MCSectionELF&>(Section);
     return ES.getFlags() & MCSectionELF::SHF_MERGE;
@@ -242,6 +248,8 @@ public:
 
 class WindowsX86AsmBackend : public X86AsmBackend {
   bool Is64Bit;
+  MCCOFFObjectFormat Format;
+
 public:
   WindowsX86AsmBackend(const Target &T, bool is64Bit)
     : X86AsmBackend(T)
@@ -249,6 +257,10 @@ public:
     HasScatteredSymbols = true;
   }
 
+  virtual const MCObjectFormat &getObjectFormat() const {
+    return Format;
+  }
+
   unsigned getPointerSize() const {
     if (Is64Bit)
       return 8;
@@ -267,13 +279,18 @@ public:
 };
 
 class DarwinX86AsmBackend : public X86AsmBackend {
+  MCMachOObjectFormat Format;
+
 public:
   DarwinX86AsmBackend(const Target &T)
     : X86AsmBackend(T) {
-    HasAbsolutizedSet = true;
     HasScatteredSymbols = true;
   }
 
+  virtual const MCObjectFormat &getObjectFormat() const {
+    return Format;
+  }
+
   bool isVirtualSection(const MCSection &Section) const {
     const MCSectionMachO &SMO = static_cast<const MCSectionMachO&>(Section);
     return (SMO.getType() == MCSectionMachO::S_ZEROFILL ||