add an x86 implementation of MCTargetExpr for

representing @GOT and friends.  Use it for
personality references as a first use.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95588 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 43 insertions, 0 deletions

diff --git a/lib/Target/X86/X86MCTargetExpr.cpp b/lib/Target/X86/X86MCTargetExpr.cpp
new file mode 100644
index 0000000..1b0d75a
--- /dev/null
+++ b/lib/Target/X86/X86MCTargetExpr.cpp
@@ -0,0 +1,43 @@
+//===- X86MCTargetExpr.cpp - X86 Target Specific MCExpr Implementation ----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86MCTargetExpr.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCValue.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+X86MCTargetExpr *X86MCTargetExpr::Create(const MCSymbol *Sym, VariantKind K,
+                                         MCContext &Ctx) {
+  return new (Ctx) X86MCTargetExpr(Sym, K);
+}
+
+void X86MCTargetExpr::PrintImpl(raw_ostream &OS) const {
+  OS << *Sym;
+  
+  switch (Kind) {
+  case GOT: OS << "@GOT"; break;
+  case PLT: OS << "@PLT"; break;
+  case GOTPCREL: OS << "@GOTPCREL"; break;
+  }
+}
+
+bool X86MCTargetExpr::EvaluateAsRelocatableImpl(MCValue &Res) const {
+  // FIXME: I don't know if this is right, it followed MCSymbolRefExpr.
+  
+  // Evaluate recursively if this is a variable.
+  if (Sym->isVariable())
+    return Sym->getValue()->EvaluateAsRelocatable(Res);
+  
+  Res = MCValue::get(Sym, 0, 0);
+  return true;
+}
+
+X86MCTargetExpr *foo(MCExpr *A) { return (X86MCTargetExpr*)A; }
\ No newline at end of file