Allow global address space forward decls using IDs in .ll files.

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

diff --git a/lib/MC/MCObjectWriter.cpp b/lib/MC/MCObjectWriter.cpp
index ab85e31abb003a73ad926a11285497de7e1412dc..347903408737ecfe479ac581e4d10fb69f3c54c5 100644 (file)
--- a/lib/MC/MCObjectWriter.cpp
+++ b/lib/MC/MCObjectWriter.cpp
@@ -1,4 +1,4 @@
-//===- lib/MC/MCObjetWriter.cpp - MCObjetWriter implementation ------------===//
+//===- lib/MC/MCObjectWriter.cpp - MCObjectWriter implementation ----------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,9 +7,43 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSymbol.h"
 
 using namespace llvm;
 
 MCObjectWriter::~MCObjectWriter() {
 }
+
+bool MCObjectWriter::isSymbolRefDifferenceFullyResolved(
+    const MCAssembler &Asm, const MCSymbolRefExpr *A, const MCSymbolRefExpr *B,
+    bool InSet) const {
+  // Modified symbol references cannot be resolved.
+  if (A->getKind() != MCSymbolRefExpr::VK_None ||
+      B->getKind() != MCSymbolRefExpr::VK_None)
+    return false;
+
+  const MCSymbol &SA = A->getSymbol();
+  const MCSymbol &SB = B->getSymbol();
+  if (SA.isUndefined() || SB.isUndefined())
+    return false;
+
+  if (!SA.getFragment() || !SB.getFragment())
+    return false;
+
+  return isSymbolRefDifferenceFullyResolvedImpl(Asm, SA, *SB.getFragment(),
+                                                InSet, false);
+}
+
+bool MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(
+    const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB,
+    bool InSet, bool IsPCRel) const {
+  const MCSection &SecA = SymA.getSection();
+  const MCSection &SecB = *FB.getParent();
+  // On ELF and COFF  A - B is absolute if A and B are in the same section.
+  return &SecA == &SecB;
+}
+
+bool MCObjectWriter::isWeak(const MCSymbol &) const { return false; }