Revert r122359 while I debug PR8845.

[oota-llvm.git] / lib / MC / ELFObjectWriter.cpp

diff --git a/lib/MC/ELFObjectWriter.cpp b/lib/MC/ELFObjectWriter.cpp
index 10e67d20d5c45a9a0363963ccc999b742261875e..b6e1223bc418a1e6de7df9195c497fe1eeb76670 100644 (file)
--- a/lib/MC/ELFObjectWriter.cpp
+++ b/lib/MC/ELFObjectWriter.cpp
@@ -344,14 +344,6 @@ namespace {
                                           MCDataFragment *F,
                                           const MCSectionData *SD);
 
-    virtual bool
-    IsSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
-                                       const MCSymbolRefExpr *A,
-                                       const MCSymbolRefExpr *B) const {
-      // FIXME: Implement this!
-      return false;
-    }
-
     virtual bool IsFixupFullyResolved(const MCAssembler &Asm,
                               const MCValue Target,
                               bool IsPCRel,
@@ -526,6 +518,15 @@ static uint64_t SymbolValue(MCSymbolData &Data, const MCAsmLayout &Layout) {
     return Data.getCommonAlignment();
 
   const MCSymbol &Symbol = Data.getSymbol();
+
+  if (Symbol.isAbsolute() && Symbol.isVariable()) {
+    if (const MCExpr *Value = Symbol.getVariableValue()) {
+      int64_t IntValue;
+      if (Value->EvaluateAsAbsolute(IntValue, Layout))
+       return (uint64_t)IntValue;
+    }
+  }
+
   if (!Symbol.isInSection())
     return 0;
 
@@ -593,26 +594,15 @@ void ELFObjectWriter::WriteSymbol(MCDataFragment *SymtabF,
 
   uint64_t Value = SymbolValue(Data, Layout);
   uint64_t Size = 0;
-  const MCExpr *ESize;
 
   assert(!(Data.isCommon() && !Data.isExternal()));
 
-  ESize = Data.getSize();
-  if (Data.getSize()) {
-    MCValue Res;
-    if (ESize->getKind() == MCExpr::Binary) {
-      const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(ESize);
-
-      if (BE->EvaluateAsRelocatable(Res, &Layout)) {
-        assert(!Res.getSymA() || !Res.getSymA()->getSymbol().isDefined());
-        assert(!Res.getSymB() || !Res.getSymB()->getSymbol().isDefined());
-        Size = Res.getConstant();
-      }
-    } else if (ESize->getKind() == MCExpr::Constant) {
-      Size = static_cast<const MCConstantExpr *>(ESize)->getValue();
-    } else {
-      assert(0 && "Unsupported size expression");
-    }
+  const MCExpr *ESize = Data.getSize();
+  if (ESize) {
+    int64_t Res;
+    if (!ESize->EvaluateAsAbsolute(Res, Layout))
+      report_fatal_error("Size expression must be absolute.");
+    Size = Res;
   }
 
   // Write out the symbol table entry