diff options
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/GlobalMerge.cpp | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/lib/Transforms/Scalar/GlobalMerge.cpp b/lib/Transforms/Scalar/GlobalMerge.cpp index d9ce74eb54..1601a8d646 100644 --- a/lib/Transforms/Scalar/GlobalMerge.cpp +++ b/lib/Transforms/Scalar/GlobalMerge.cpp @@ -76,7 +76,7 @@ namespace { const TargetLowering *TLI; bool doMerge(SmallVectorImpl<GlobalVariable*> &Globals, - Module &M, bool isConst) const; + Module &M, bool isConst, unsigned AddrSpace) const; public: static char ID; // Pass identification, replacement for typeid. @@ -118,7 +118,7 @@ INITIALIZE_PASS(GlobalMerge, "global-merge", bool GlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals, - Module &M, bool isConst) const { + Module &M, bool isConst, unsigned AddrSpace) const { const DataLayout *TD = TLI->getDataLayout(); // FIXME: Infer the maximum possible offset depending on the actual users @@ -150,7 +150,9 @@ bool GlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals, Constant *MergedInit = ConstantStruct::get(MergedTy, Inits); GlobalVariable *MergedGV = new GlobalVariable(M, MergedTy, isConst, GlobalValue::InternalLinkage, - MergedInit, "_MergedGlobals"); + MergedInit, "_MergedGlobals", + 0, GlobalVariable::NotThreadLocal, + AddrSpace); for (size_t k = i; k < j; ++k) { Constant *Idx[2] = { ConstantInt::get(Int32Ty, 0), @@ -169,7 +171,8 @@ bool GlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals, bool GlobalMerge::doInitialization(Module &M) { - SmallVector<GlobalVariable*, 16> Globals, ConstGlobals, BSSGlobals; + DenseMap<unsigned, SmallVector<GlobalVariable*, 16> > Globals, ConstGlobals, + BSSGlobals; const DataLayout *TD = TLI->getDataLayout(); unsigned MaxOffset = TLI->getMaximalGlobalOffset(); bool Changed = false; @@ -181,6 +184,11 @@ bool GlobalMerge::doInitialization(Module &M) { if (!I->hasLocalLinkage() || I->isThreadLocal() || I->hasSection()) continue; + PointerType *PT = dyn_cast<PointerType>(I->getType()); + assert(PT && "Global variable is not a pointer!"); + + unsigned AddressSpace = PT->getAddressSpace(); + // Ignore fancy-aligned globals for now. unsigned Alignment = TD->getPreferredAlignment(I); Type *Ty = I->getType()->getElementType(); @@ -195,18 +203,23 @@ bool GlobalMerge::doInitialization(Module &M) { if (TD->getTypeAllocSize(Ty) < MaxOffset) { if (TargetLoweringObjectFile::getKindForGlobal(I, TLI->getTargetMachine()) .isBSSLocal()) - BSSGlobals.push_back(I); + BSSGlobals[AddressSpace].push_back(I); else if (I->isConstant()) - ConstGlobals.push_back(I); + ConstGlobals[AddressSpace].push_back(I); else - Globals.push_back(I); + Globals[AddressSpace].push_back(I); } } - if (Globals.size() > 1) - Changed |= doMerge(Globals, M, false); - if (BSSGlobals.size() > 1) - Changed |= doMerge(BSSGlobals, M, false); + for (DenseMap<unsigned, SmallVector<GlobalVariable*, 16> >::iterator + I = Globals.begin(), E = Globals.end(); I != E; ++I) + if (I->second.size() > 1) + Changed |= doMerge(I->second, M, false, I->first); + + for (DenseMap<unsigned, SmallVector<GlobalVariable*, 16> >::iterator + I = BSSGlobals.begin(), E = BSSGlobals.end(); I != E; ++I) + if (I->second.size() > 1) + Changed |= doMerge(I->second, M, false, I->first); // FIXME: This currently breaks the EH processing due to way how the // typeinfo detection works. We might want to detect the TIs and ignore |