diff options
Diffstat (limited to 'lib/Transforms/Utils/ModuleUtils.cpp')
-rw-r--r-- | lib/Transforms/Utils/ModuleUtils.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/ModuleUtils.cpp b/lib/Transforms/Utils/ModuleUtils.cpp index d090b48721..ff6e6f9c60 100644 --- a/lib/Transforms/Utils/ModuleUtils.cpp +++ b/lib/Transforms/Utils/ModuleUtils.cpp @@ -12,6 +12,7 @@ //===----------------------------------------------------------------------===// #include "llvm/Transforms/Utils/ModuleUtils.h" +#include "llvm/ADT/SmallPtrSet.h" #include "llvm/IR/DerivedTypes.h" #include "llvm/IR/Function.h" #include "llvm/IR/IRBuilder.h" @@ -62,3 +63,20 @@ void llvm::appendToGlobalCtors(Module &M, Function *F, int Priority) { void llvm::appendToGlobalDtors(Module &M, Function *F, int Priority) { appendToGlobalArray("llvm.global_dtors", M, F, Priority); } + +GlobalVariable * +llvm::collectUsedGlobalVariables(Module &M, SmallPtrSet<GlobalValue *, 8> &Set, + bool CompilerUsed) { + const char *Name = CompilerUsed ? "llvm.compiler.used" : "llvm.used"; + GlobalVariable *GV = M.getGlobalVariable(Name); + if (!GV || !GV->hasInitializer()) + return GV; + + const ConstantArray *Init = cast<ConstantArray>(GV->getInitializer()); + for (unsigned I = 0, E = Init->getNumOperands(); I != E; ++I) { + Value *Op = Init->getOperand(I); + GlobalValue *G = cast<GlobalValue>(Op->stripPointerCastsNoFollowAliases()); + Set.insert(G); + } + return GV; +} |