//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/CodeExtractor.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Instructions.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/LLVMContext.h"
-#include "llvm/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Analysis/Dominators.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SetVector.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/Analysis/LoopInfo.h"
-#include "llvm/Analysis/Verifier.h"
-#include "llvm/Transforms/Utils/BasicBlockUtils.h"
+#include "llvm/Analysis/RegionInfo.h"
+#include "llvm/Analysis/RegionIterator.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Dominators.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SetVector.h"
-#include "llvm/ADT/StringExtras.h"
+#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include <algorithm>
#include <set>
using namespace llvm;
}
/// \brief Build a set of blocks to extract if the input blocks are viable.
-static SetVector<BasicBlock *>
-buildExtractionBlockSet(ArrayRef<BasicBlock *> BBs) {
+template <typename IteratorT>
+static SetVector<BasicBlock *> buildExtractionBlockSet(IteratorT BBBegin,
+ IteratorT BBEnd) {
SetVector<BasicBlock *> Result;
- assert(!BBs.empty());
+ assert(BBBegin != BBEnd);
// Loop over the blocks, adding them to our set-vector, and aborting with an
// empty set if we encounter invalid blocks.
- for (ArrayRef<BasicBlock *>::iterator I = BBs.begin(), E = BBs.end();
- I != E; ++I) {
+ for (IteratorT I = BBBegin, E = BBEnd; I != E; ++I) {
if (!Result.insert(*I))
- continue;
+ llvm_unreachable("Repeated basic blocks in extraction input");
if (!isBlockValidForExtraction(**I)) {
Result.clear();
}
#ifndef NDEBUG
- for (ArrayRef<BasicBlock *>::iterator I = llvm::next(BBs.begin()),
- E = BBs.end();
+ for (SetVector<BasicBlock *>::iterator I = llvm::next(Result.begin()),
+ E = Result.end();
I != E; ++I)
for (pred_iterator PI = pred_begin(*I), PE = pred_end(*I);
PI != PE; ++PI)
return Result;
}
+/// \brief Helper to call buildExtractionBlockSet with an ArrayRef.
+static SetVector<BasicBlock *>
+buildExtractionBlockSet(ArrayRef<BasicBlock *> BBs) {
+ return buildExtractionBlockSet(BBs.begin(), BBs.end());
+}
+
+/// \brief Helper to call buildExtractionBlockSet with a RegionNode.
+static SetVector<BasicBlock *>
+buildExtractionBlockSet(const RegionNode &RN) {
+ if (!RN.isSubRegion())
+ // Just a single BasicBlock.
+ return buildExtractionBlockSet(RN.getNodeAs<BasicBlock>());
+
+ const Region &R = *RN.getNodeAs<Region>();
+
+ return buildExtractionBlockSet(R.block_begin(), R.block_end());
+}
+
CodeExtractor::CodeExtractor(BasicBlock *BB, bool AggregateArgs)
: DT(0), AggregateArgs(AggregateArgs||AggregateArgsOpt),
Blocks(buildExtractionBlockSet(BB)), NumExitBlocks(~0U) {}
: DT(&DT), AggregateArgs(AggregateArgs||AggregateArgsOpt),
Blocks(buildExtractionBlockSet(L.getBlocks())), NumExitBlocks(~0U) {}
+CodeExtractor::CodeExtractor(DominatorTree &DT, const RegionNode &RN,
+ bool AggregateArgs)
+ : DT(&DT), AggregateArgs(AggregateArgs||AggregateArgsOpt),
+ Blocks(buildExtractionBlockSet(RN)), NumExitBlocks(~0U) {}
/// definedInRegion - Return true if the specified value is defined in the
/// extracted region.
return false;
}
+void CodeExtractor::findInputsOutputs(ValueSet &Inputs,
+ ValueSet &Outputs) const {
+ for (SetVector<BasicBlock *>::const_iterator I = Blocks.begin(),
+ E = Blocks.end();
+ I != E; ++I) {
+ BasicBlock *BB = *I;
+
+ // If a used value is defined outside the region, it's an input. If an
+ // instruction is used outside the region, it's an output.
+ for (BasicBlock::iterator II = BB->begin(), IE = BB->end();
+ II != IE; ++II) {
+ for (User::op_iterator OI = II->op_begin(), OE = II->op_end();
+ OI != OE; ++OI)
+ if (definedInCaller(Blocks, *OI))
+ Inputs.insert(*OI);
+
+ for (Value::use_iterator UI = II->use_begin(), UE = II->use_end();
+ UI != UE; ++UI)
+ if (!definedInRegion(Blocks, *UI)) {
+ Outputs.insert(II);
+ break;
+ }
+ }
+ }
+}
+
/// severSplitPHINodes - If a PHI node has multiple inputs from outside of the
/// region, we need to split the entry block of the region so that the PHI node
/// is easier to deal with.
DomTreeNode *NewNode = DT->addNewBlock(New, *I);
- for (SmallVector<DomTreeNode*, 8>::iterator I = Children.begin(),
- E = Children.end(); I != E; ++I)
+ for (SmallVectorImpl<DomTreeNode *>::iterator I = Children.begin(),
+ E = Children.end(); I != E; ++I)
DT->changeImmediateDominator(*I, NewNode);
}
}
}
-// findInputsOutputs - Find inputs to, outputs from the code region.
-//
-void CodeExtractor::findInputsOutputs(ValueSet &inputs, ValueSet &outputs) {
- std::set<BasicBlock*> ExitBlocks;
- for (SetVector<BasicBlock*>::const_iterator ci = Blocks.begin(),
- ce = Blocks.end(); ci != ce; ++ci) {
- BasicBlock *BB = *ci;
-
- for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
- // If a used value is defined outside the region, it's an input. If an
- // instruction is used outside the region, it's an output.
- for (User::op_iterator O = I->op_begin(), E = I->op_end(); O != E; ++O)
- if (definedInCaller(Blocks, *O))
- inputs.insert(*O);
-
- // Consider uses of this instruction (outputs).
- for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
- UI != E; ++UI)
- if (!definedInRegion(Blocks, *UI)) {
- outputs.insert(I);
- break;
- }
- } // for: insts
-
- // Keep track of the exit blocks from the region.
- TerminatorInst *TI = BB->getTerminator();
- for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i)
- if (!Blocks.count(TI->getSuccessor(i)))
- ExitBlocks.insert(TI->getSuccessor(i));
- } // for: basic blocks
-
- NumExitBlocks = ExitBlocks.size();
-}
-
/// constructFunction - make a function based on inputs and outputs, as follows:
/// f(in0, ..., inN, out0, ..., outN)
///
header->getName(), M);
// If the old function is no-throw, so is the new one.
if (oldFunction->doesNotThrow())
- newFunction->setDoesNotThrow(true);
+ newFunction->setDoesNotThrow();
newFunction->getBasicBlockList().push_back(newRootNode);
// Find inputs to, outputs from the code region.
findInputsOutputs(inputs, outputs);
+ SmallPtrSet<BasicBlock *, 1> ExitBlocks;
+ for (SetVector<BasicBlock *>::iterator I = Blocks.begin(), E = Blocks.end();
+ I != E; ++I)
+ for (succ_iterator SI = succ_begin(*I), SE = succ_end(*I); SI != SE; ++SI)
+ if (!Blocks.count(*SI))
+ ExitBlocks.insert(*SI);
+ NumExitBlocks = ExitBlocks.size();
+
// Construct new function based on inputs/outputs & add allocas for all defs.
Function *newFunction = constructFunction(inputs, outputs, header,
newFuncRoot,
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