#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
}
/// ExtractTypeInfo - Returns the type info, possibly bitcast, encoded in V.
-GlobalVariable *llvm::ExtractTypeInfo(Value *V) {
+GlobalValue *llvm::ExtractTypeInfo(Value *V) {
V = V->stripPointerCasts();
- GlobalVariable *GV = dyn_cast<GlobalVariable>(V);
+ GlobalValue *GV = dyn_cast<GlobalValue>(V);
+ GlobalVariable *Var = dyn_cast<GlobalVariable>(V);
- if (GV && GV->getName() == "llvm.eh.catch.all.value") {
- assert(GV->hasInitializer() &&
+ if (Var && Var->getName() == "llvm.eh.catch.all.value") {
+ assert(Var->hasInitializer() &&
"The EH catch-all value must have an initializer");
- Value *Init = GV->getInitializer();
- GV = dyn_cast<GlobalVariable>(Init);
+ Value *Init = Var->getInitializer();
+ GV = dyn_cast<GlobalValue>(Init);
if (!GV) V = cast<ConstantPointerNull>(Init);
}
/// between it and the return.
///
/// This function only tests target-independent requirements.
-bool llvm::isInTailCallPosition(ImmutableCallSite CS, const TargetMachine &TM,
- const TargetLoweringBase &TLI) {
+bool llvm::isInTailCallPosition(ImmutableCallSite CS, const TargetMachine &TM) {
const Instruction *I = CS.getInstruction();
const BasicBlock *ExitBB = I->getParent();
const TerminatorInst *Term = ExitBB->getTerminator();
return false;
}
- return returnTypeIsEligibleForTailCall(ExitBB->getParent(), I, Ret, TLI);
+ return returnTypeIsEligibleForTailCall(
+ ExitBB->getParent(), I, Ret, *TM.getSubtargetImpl()->getTargetLowering());
}
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;
+}