From 305a51fec365ad92c514409595a91c8763917899 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Fri, 15 Aug 2014 14:31:47 +0000
Subject: [PATCH] Make BuildSymbolDiff an static helper.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215717 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/MC/MCStreamer.h |  3 ---
 lib/MC/MCObjectStreamer.cpp  | 15 +++++++++++++--
 lib/MC/MCStreamer.cpp        | 13 -------------
 3 files changed, 13 insertions(+), 18 deletions(-)

diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index d10ac0f7ef7..b8fa9fcdc34 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -196,9 +196,6 @@ class MCStreamer {
 protected:
   MCStreamer(MCContext &Ctx);
 
-  const MCExpr *BuildSymbolDiff(MCContext &Context, const MCSymbol *A,
-                                const MCSymbol *B);
-
   virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame);
   virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &CurFrame);
 
diff --git a/lib/MC/MCObjectStreamer.cpp b/lib/MC/MCObjectStreamer.cpp
index ad6bc47c916..76a6532b8ee 100644
--- a/lib/MC/MCObjectStreamer.cpp
+++ b/lib/MC/MCObjectStreamer.cpp
@@ -264,6 +264,17 @@ void MCObjectStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
                                           Isa, Discriminator, FileName);
 }
 
+static const MCExpr *buildSymbolDiff(MCObjectStreamer &OS, const MCSymbol *A,
+                                     const MCSymbol *B) {
+  MCContext &Context = OS.getContext();
+  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+  const MCExpr *ARef = MCSymbolRefExpr::Create(A, Variant, Context);
+  const MCExpr *BRef = MCSymbolRefExpr::Create(B, Variant, Context);
+  const MCExpr *AddrDelta =
+      MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
+  return AddrDelta;
+}
+
 void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
                                                 const MCSymbol *LastLabel,
                                                 const MCSymbol *Label,
@@ -272,7 +283,7 @@ void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
     EmitDwarfSetLineAddr(LineDelta, Label, PointerSize);
     return;
   }
-  const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+  const MCExpr *AddrDelta = buildSymbolDiff(*this, Label, LastLabel);
   int64_t Res;
   if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
     MCDwarfLineAddr::Emit(this, LineDelta, Res);
@@ -283,7 +294,7 @@ void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
 
 void MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
                                                  const MCSymbol *Label) {
-  const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+  const MCExpr *AddrDelta = buildSymbolDiff(*this, Label, LastLabel);
   int64_t Res;
   if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
     MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res);
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index ffbdc7111d5..096438f56e2 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -56,19 +56,6 @@ void MCStreamer::reset() {
   SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
 }
 
-const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
-                                          const MCSymbol *A,
-                                          const MCSymbol *B) {
-  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
-  const MCExpr *ARef =
-    MCSymbolRefExpr::Create(A, Variant, Context);
-  const MCExpr *BRef =
-    MCSymbolRefExpr::Create(B, Variant, Context);
-  const MCExpr *AddrDelta =
-    MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
-  return AddrDelta;
-}
-
 static const MCExpr *forceExpAbs(MCStreamer &OS, const MCExpr* Expr) {
   MCContext &Context = OS.getContext();
   assert(!isa<MCSymbolRefExpr>(Expr));
-- 
2.34.1