1 files changed, 89 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp b/contrib/llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp
new file mode 100644
index 000000000000..5bba3e5b7ae2
--- /dev/null
+++ b/contrib/llvm/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp
@@ -0,0 +1,89 @@
+//===-- MipsMCExpr.cpp - Mips specific MC expression classes --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MipsMCExpr.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCObjectStreamer.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "mipsmcexpr"
+
+bool MipsMCExpr::isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK,
+                                       const MCBinaryExpr *BE) {
+  switch (VK) {
+  case MCSymbolRefExpr::VK_Mips_ABS_LO:
+  case MCSymbolRefExpr::VK_Mips_ABS_HI:
+  case MCSymbolRefExpr::VK_Mips_HIGHER:
+  case MCSymbolRefExpr::VK_Mips_HIGHEST:
+    break;
+  default:
+    return false;
+  }
+
+  // We support expressions of the form "(sym1 binop1 sym2) binop2 const",
+  // where "binop2 const" is optional.
+  if (isa<MCBinaryExpr>(BE->getLHS())) {
+    if (!isa<MCConstantExpr>(BE->getRHS()))
+      return false;
+    BE = cast<MCBinaryExpr>(BE->getLHS());
+  }
+  return (isa<MCSymbolRefExpr>(BE->getLHS())
+          && isa<MCSymbolRefExpr>(BE->getRHS()));
+}
+
+const MipsMCExpr*
+MipsMCExpr::Create(MCSymbolRefExpr::VariantKind VK, const MCExpr *Expr,
+                   MCContext &Ctx) {
+  VariantKind Kind;
+  switch (VK) {
+  case MCSymbolRefExpr::VK_Mips_ABS_LO:
+    Kind = VK_Mips_LO;
+    break;
+  case MCSymbolRefExpr::VK_Mips_ABS_HI:
+    Kind = VK_Mips_HI;
+    break;
+  case MCSymbolRefExpr::VK_Mips_HIGHER:
+    Kind = VK_Mips_HIGHER;
+    break;
+  case MCSymbolRefExpr::VK_Mips_HIGHEST:
+    Kind = VK_Mips_HIGHEST;
+    break;
+  default:
+    llvm_unreachable("Invalid kind!");
+  }
+
+  return new (Ctx) MipsMCExpr(Kind, Expr);
+}
+
+void MipsMCExpr::PrintImpl(raw_ostream &OS) const {
+  switch (Kind) {
+  default: llvm_unreachable("Invalid kind!");
+  case VK_Mips_LO: OS << "%lo"; break;
+  case VK_Mips_HI: OS << "%hi"; break;
+  case VK_Mips_HIGHER: OS << "%higher"; break;
+  case VK_Mips_HIGHEST: OS << "%highest"; break;
+  }
+
+  OS << '(';
+  Expr->print(OS);
+  OS << ')';
+}
+
+bool
+MipsMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
+                                      const MCAsmLayout *Layout) const {
+  return getSubExpr()->EvaluateAsRelocatable(Res, Layout);
+}
+
+void MipsMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
+  Streamer.visitUsedExpr(*getSubExpr());
+}