#include <map>
using namespace llvm;
-// CloneBasicBlock - See comments in Cloning.h
+/// See comments in Cloning.h.
BasicBlock *llvm::CloneBasicBlock(const BasicBlock *BB,
ValueToValueMapTy &VMap,
const Twine &NameSuffix, Function *F,
// Find the MDNode which corresponds to the DISubprogram data that described F.
static MDNode* FindSubprogram(const Function *F, DebugInfoFinder &Finder) {
for (DISubprogram Subprogram : Finder.subprograms()) {
- if (Subprogram.describes(F)) return Subprogram;
+ if (Subprogram->describes(F))
+ return Subprogram;
}
return nullptr;
}
// Add an operand to an existing MDNode. The new operand will be added at the
// back of the operand list.
-static void AddOperand(DICompileUnit CU, DIArray SPs, Metadata *NewSP) {
+static void AddOperand(DICompileUnit CU, MDSubprogramArray SPs, Metadata *NewSP) {
SmallVector<Metadata *, 16> NewSPs;
- NewSPs.reserve(SPs->getNumOperands() + 1);
- for (unsigned I = 0, E = SPs->getNumOperands(); I != E; ++I)
- NewSPs.push_back(SPs->getOperand(I));
+ NewSPs.reserve(SPs.size() + 1);
+ for (auto *SP : SPs)
+ NewSPs.push_back(SP);
NewSPs.push_back(NewSP);
- CU.replaceSubprograms(DIArray(MDNode::get(CU->getContext(), NewSPs)));
+ CU->replaceSubprograms(MDTuple::get(CU->getContext(), NewSPs));
}
// Clone the module-level debug info associated with OldFunc. The cloned data
// Ensure that OldFunc appears in the map.
// (if it's already there it must point to NewFunc anyway)
VMap[OldFunc] = NewFunc;
- DISubprogram NewSubprogram(MapMetadata(OldSubprogramMDNode, VMap));
+ DISubprogram NewSubprogram =
+ cast<MDSubprogram>(MapMetadata(OldSubprogramMDNode, VMap));
for (DICompileUnit CU : Finder.compile_units()) {
- DIArray Subprograms(CU.getSubprograms());
-
+ auto Subprograms = CU->getSubprograms();
// If the compile unit's function list contains the old function, it should
// also contain the new one.
- for (unsigned i = 0; i < Subprograms.getNumElements(); i++) {
- if ((MDNode*)Subprograms.getElement(i) == OldSubprogramMDNode) {
+ for (auto *SP : Subprograms) {
+ if (SP == OldSubprogramMDNode) {
AddOperand(CU, Subprograms, NewSubprogram);
break;
}
}
}
-/// CloneFunction - Return a copy of the specified function, but without
+/// Return a copy of the specified function, but without
/// embedding the function into another module. Also, any references specified
/// in the VMap are changed to refer to their mapped value instead of the
/// original one. If any of the arguments to the function are in the VMap,
namespace {
- /// PruningFunctionCloner - This class is a private class used to implement
- /// the CloneAndPruneFunctionInto method.
+ /// This is a private class used to implement CloneAndPruneFunctionInto.
struct PruningFunctionCloner {
Function *NewFunc;
const Function *OldFunc;
}
}
- /// CloneBlock - The specified block is found to be reachable, clone it and
+ /// The specified block is found to be reachable, clone it and
/// anything that it can reach.
void CloneBlock(const BasicBlock *BB,
BasicBlock::const_iterator StartingInst,
};
}
-/// CloneBlock - The specified block is found to be reachable, clone it and
+/// The specified block is found to be reachable, clone it and
/// anything that it can reach.
void PruningFunctionCloner::CloneBlock(const BasicBlock *BB,
BasicBlock::const_iterator StartingInst,
// terminator into the new basic block in this case.
if (Action == CloningDirector::StopCloningBB)
return;
+ if (Action == CloningDirector::CloneSuccessors) {
+ // If the director says to skip with a terminate instruction, we still
+ // need to clone this block's successors.
+ const TerminatorInst *TI = NewBB->getTerminator();
+ for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i)
+ ToClone.push_back(TI->getSuccessor(i));
+ return;
+ }
assert(Action != CloningDirector::SkipInstruction &&
"SkipInstruction is not valid for terminators.");
}
}
}
-/// CloneAndPruneIntoFromInst - This works like CloneAndPruneFunctionInto, except
-/// that it does not clone the entire function. Instead it starts at an
-/// instruction provided by the caller and copies (and prunes) only the code
-/// reachable from that instruction.
+/// This works like CloneAndPruneFunctionInto, except that it does not clone the
+/// entire function. Instead it starts at an instruction provided by the caller
+/// and copies (and prunes) only the code reachable from that instruction.
void llvm::CloneAndPruneIntoFromInst(Function *NewFunc, const Function *OldFunc,
const Instruction *StartingInst,
ValueToValueMapTy &VMap,
// Handle PHI nodes specially, as we have to remove references to dead
// blocks.
- for (BasicBlock::const_iterator I = BI->begin(), E = BI->end(); I != E; ++I)
- if (const PHINode *PN = dyn_cast<PHINode>(I))
- PHIToResolve.push_back(PN);
- else
+ for (BasicBlock::const_iterator I = BI->begin(), E = BI->end(); I != E; ++I) {
+ // PHI nodes may have been remapped to non-PHI nodes by the caller or
+ // during the cloning process.
+ if (const PHINode *PN = dyn_cast<PHINode>(I)) {
+ if (isa<PHINode>(VMap[PN]))
+ PHIToResolve.push_back(PN);
+ else
+ break;
+ } else {
break;
+ }
+ }
// Finally, remap the terminator instructions, as those can't be remapped
// until all BBs are mapped.
recursivelySimplifyInstruction(PN);
// Now that the inlined function body has been fully constructed, go through
- // and zap unconditional fall-through branches. This happen all the time when
+ // and zap unconditional fall-through branches. This happens all the time when
// specializing code: code specialization turns conditional branches into
// uncond branches, and this code folds them.
Function::iterator Begin = cast<BasicBlock>(VMap[StartingBB]);
// Do not increment I, iteratively merge all things this block branches to.
}
- // Make a final pass over the basic blocks from theh old function to gather
+ // Make a final pass over the basic blocks from the old function to gather
// any return instructions which survived folding. We have to do this here
// because we can iteratively remove and merge returns above.
for (Function::iterator I = cast<BasicBlock>(VMap[StartingBB]),
}
-/// CloneAndPruneFunctionInto - This works exactly like CloneFunctionInto,
+/// This works exactly like CloneFunctionInto,
/// except that it does some simple constant prop and DCE on the fly. The
/// effect of this is to copy significantly less code in cases where (for
/// example) a function call with constant arguments is inlined, and those
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