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Hoist the AllocaInfo struct to the top of the file.
This struct is nicely independent of everything else, and we already needed a foward declaration here. It's simpler to just define it immediately. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186780 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -102,7 +102,63 @@ bool llvm::isAllocaPromotable(const AllocaInst *AI) {
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namespace {
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struct AllocaInfo;
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struct AllocaInfo {
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SmallVector<BasicBlock *, 32> DefiningBlocks;
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SmallVector<BasicBlock *, 32> UsingBlocks;
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StoreInst *OnlyStore;
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BasicBlock *OnlyBlock;
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bool OnlyUsedInOneBlock;
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Value *AllocaPointerVal;
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DbgDeclareInst *DbgDeclare;
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void clear() {
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DefiningBlocks.clear();
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UsingBlocks.clear();
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OnlyStore = 0;
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OnlyBlock = 0;
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OnlyUsedInOneBlock = true;
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AllocaPointerVal = 0;
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DbgDeclare = 0;
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}
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/// Scan the uses of the specified alloca, filling in the AllocaInfo used
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/// by the rest of the pass to reason about the uses of this alloca.
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void AnalyzeAlloca(AllocaInst *AI) {
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clear();
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// As we scan the uses of the alloca instruction, keep track of stores,
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// and decide whether all of the loads and stores to the alloca are within
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// the same basic block.
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for (Value::use_iterator UI = AI->use_begin(), E = AI->use_end();
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UI != E;) {
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Instruction *User = cast<Instruction>(*UI++);
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if (StoreInst *SI = dyn_cast<StoreInst>(User)) {
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// Remember the basic blocks which define new values for the alloca
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DefiningBlocks.push_back(SI->getParent());
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AllocaPointerVal = SI->getOperand(0);
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OnlyStore = SI;
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} else {
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LoadInst *LI = cast<LoadInst>(User);
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// Otherwise it must be a load instruction, keep track of variable
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// reads.
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UsingBlocks.push_back(LI->getParent());
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AllocaPointerVal = LI;
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}
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if (OnlyUsedInOneBlock) {
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if (OnlyBlock == 0)
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OnlyBlock = User->getParent();
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else if (OnlyBlock != User->getParent())
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OnlyUsedInOneBlock = false;
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}
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}
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DbgDeclare = FindAllocaDbgDeclare(AI);
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}
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};
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// Data package used by RenamePass()
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class RenamePassData {
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@ -266,64 +322,6 @@ private:
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bool QueuePhiNode(BasicBlock *BB, unsigned AllocaIdx, unsigned &Version);
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};
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struct AllocaInfo {
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SmallVector<BasicBlock *, 32> DefiningBlocks;
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SmallVector<BasicBlock *, 32> UsingBlocks;
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StoreInst *OnlyStore;
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BasicBlock *OnlyBlock;
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bool OnlyUsedInOneBlock;
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Value *AllocaPointerVal;
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DbgDeclareInst *DbgDeclare;
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void clear() {
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DefiningBlocks.clear();
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UsingBlocks.clear();
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OnlyStore = 0;
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OnlyBlock = 0;
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OnlyUsedInOneBlock = true;
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AllocaPointerVal = 0;
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DbgDeclare = 0;
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}
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/// Scan the uses of the specified alloca, filling in the AllocaInfo used
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/// by the rest of the pass to reason about the uses of this alloca.
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void AnalyzeAlloca(AllocaInst *AI) {
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clear();
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// As we scan the uses of the alloca instruction, keep track of stores,
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// and decide whether all of the loads and stores to the alloca are within
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// the same basic block.
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for (Value::use_iterator UI = AI->use_begin(), E = AI->use_end();
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UI != E;) {
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Instruction *User = cast<Instruction>(*UI++);
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if (StoreInst *SI = dyn_cast<StoreInst>(User)) {
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// Remember the basic blocks which define new values for the alloca
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DefiningBlocks.push_back(SI->getParent());
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AllocaPointerVal = SI->getOperand(0);
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OnlyStore = SI;
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} else {
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LoadInst *LI = cast<LoadInst>(User);
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// Otherwise it must be a load instruction, keep track of variable
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// reads.
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UsingBlocks.push_back(LI->getParent());
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AllocaPointerVal = LI;
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}
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if (OnlyUsedInOneBlock) {
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if (OnlyBlock == 0)
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OnlyBlock = User->getParent();
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else if (OnlyBlock != User->getParent())
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OnlyUsedInOneBlock = false;
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}
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}
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DbgDeclare = FindAllocaDbgDeclare(AI);
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}
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};
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} // end of anonymous namespace
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static void removeLifetimeIntrinsicUsers(AllocaInst *AI) {
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