From f21434ccb0895e092ea2e219be8cd893f12a41f5 Mon Sep 17 00:00:00 2001 From: Rafael Espindola Date: Wed, 30 Jul 2014 19:42:16 +0000 Subject: Refactor duplicated code. llvm-svn: 214328 --- llvm/lib/CodeGen/Analysis.cpp | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'llvm/lib/CodeGen/Analysis.cpp') diff --git a/llvm/lib/CodeGen/Analysis.cpp b/llvm/lib/CodeGen/Analysis.cpp index 0eabee30e96..935cd63315a 100644 --- a/llvm/lib/CodeGen/Analysis.cpp +++ b/llvm/lib/CodeGen/Analysis.cpp @@ -25,6 +25,7 @@ #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/MathExtras.h" #include "llvm/Target/TargetLowering.h" +#include "llvm/Transforms/Utils/GlobalStatus.h" using namespace llvm; /// ComputeLinearIndex - Given an LLVM IR aggregate type and a sequence @@ -606,3 +607,29 @@ 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(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(GV)) + return false; + + GlobalStatus GS; + if (GlobalStatus::analyzeGlobal(GV, GS)) + return false; + + return !GS.IsCompared; +} -- cgit v1.2.3