Sink DwarfUnit::LabelBegin down into DwarfCompileUnit since that's the only place...

[oota-llvm.git] / lib / CodeGen / Analysis.cpp

diff --git a/lib/CodeGen/Analysis.cpp b/lib/CodeGen/Analysis.cpp
index 0eabee30e96484044d36785a0ddf9bc8de4eef23..020363524336c4739a063938a50097b3ca8652a2 100644 (file)
--- a/lib/CodeGen/Analysis.cpp
+++ b/lib/CodeGen/Analysis.cpp
@@ -25,6 +25,9 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
+#include "llvm/Transforms/Utils/GlobalStatus.h"
+
 using namespace llvm;
 
 /// ComputeLinearIndex - Given an LLVM IR aggregate type and a sequence
@@ -508,8 +511,8 @@ bool llvm::isInTailCallPosition(ImmutableCallSite CS, const TargetMachine &TM) {
         return false;
     }
 
-  return returnTypeIsEligibleForTailCall(ExitBB->getParent(), I, Ret,
-                                         *TM.getTargetLowering());
+  return returnTypeIsEligibleForTailCall(
+      ExitBB->getParent(), I, Ret, *TM.getSubtargetImpl()->getTargetLowering());
 }
 
 bool llvm::returnTypeIsEligibleForTailCall(const Function *F,
@@ -606,3 +609,29 @@ bool llvm::returnTypeIsEligibleForTailCall(const Function *F,
 
   return true;
 }
+
+bool llvm::canBeOmittedFromSymbolTable(const GlobalValue *GV) {
+  if (!GV->hasLinkOnceODRLinkage())
+    return false;
+
+  if (GV->hasUnnamedAddr())
+    return true;
+
+  // If it is a non constant variable, it needs to be uniqued across shared
+  // objects.
+  if (const GlobalVariable *Var = dyn_cast<GlobalVariable>(GV)) {
+    if (!Var->isConstant())
+      return false;
+  }
+
+  // An alias can point to a variable. We could try to resolve the alias to
+  // decide, but for now just don't hide them.
+  if (isa<GlobalAlias>(GV))
+    return false;
+
+  GlobalStatus GS;
+  if (GlobalStatus::analyzeGlobal(GV, GS))
+    return false;
+
+  return !GS.IsCompared;
+}