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-rw-r--r--llvm/lib/Transforms/Utils/SimplifyCFG.cpp57
1 files changed, 46 insertions, 11 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index ec5db1e5744..323b81ca815 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -11,27 +11,39 @@
//
//===----------------------------------------------------------------------===//
+#include "llvm/ADT/APInt.h"
+#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SetOperations.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/EHPersonalities.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/ValueTracking.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/CallSite.h"
#include "llvm/IR/CFG.h"
+#include "llvm/IR/Constant.h"
#include "llvm/IR/ConstantRange.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/InstrTypes.h"
+#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Metadata.h"
@@ -40,15 +52,28 @@
#include "llvm/IR/Operator.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/IR/Type.h"
+#include "llvm/IR/User.h"
+#include "llvm/IR/Value.h"
+#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
#include <algorithm>
+#include <cassert>
+#include <climits>
+#include <cstddef>
+#include <cstdint>
+#include <iterator>
#include <map>
#include <set>
+#include <utility>
+#include <vector>
+
using namespace llvm;
using namespace PatternMatch;
@@ -110,6 +135,7 @@ STATISTIC(NumSinkCommons,
STATISTIC(NumSpeculations, "Number of speculative executed instructions");
namespace {
+
// The first field contains the value that the switch produces when a certain
// case group is selected, and the second field is a vector containing the
// cases composing the case group.
@@ -168,9 +194,11 @@ public:
SmallPtrSetImpl<BasicBlock *> *LoopHeaders)
: TTI(TTI), DL(DL), BonusInstThreshold(BonusInstThreshold), AC(AC),
LoopHeaders(LoopHeaders) {}
+
bool run(BasicBlock *BB);
};
-}
+
+} // end anonymous namespace
/// Return true if it is safe to merge these two
/// terminator instructions together.
@@ -627,7 +655,8 @@ private:
}
}
};
-}
+
+} // end anonymous namespace
static void EraseTerminatorInstAndDCECond(TerminatorInst *TI) {
Instruction *Cond = nullptr;
@@ -712,7 +741,7 @@ static bool ValuesOverlap(std::vector<ValueEqualityComparisonCase> &C1,
if (V1->size() > V2->size())
std::swap(V1, V2);
- if (V1->size() == 0)
+ if (V1->empty())
return false;
if (V1->size() == 1) {
// Just scan V2.
@@ -880,6 +909,7 @@ bool SimplifyCFGOpt::SimplifyEqualityComparisonWithOnlyPredecessor(
}
namespace {
+
/// This class implements a stable ordering of constant
/// integers that does not depend on their address. This is important for
/// applications that sort ConstantInt's to ensure uniqueness.
@@ -888,7 +918,8 @@ struct ConstantIntOrdering {
return LHS->getValue().ult(RHS->getValue());
}
};
-}
+
+} // end anonymous namespace
static int ConstantIntSortPredicate(ConstantInt *const *P1,
ConstantInt *const *P2) {
@@ -1568,6 +1599,7 @@ static bool sinkLastInstruction(ArrayRef<BasicBlock*> Blocks) {
}
namespace {
+
// LockstepReverseIterator - Iterates through instructions
// in a set of blocks in reverse order from the first non-terminator.
// For example (assume all blocks have size n):
@@ -1624,7 +1656,8 @@ namespace {
return Insts;
}
};
-}
+
+} // end anonymous namespace
/// Given an unconditional branch that goes to BBEnd,
/// check whether BBEnd has only two predecessors and the other predecessor
@@ -4520,7 +4553,7 @@ ConstantFold(Instruction *I, const DataLayout &DL,
static bool
GetCaseResults(SwitchInst *SI, ConstantInt *CaseVal, BasicBlock *CaseDest,
BasicBlock **CommonDest,
- SmallVectorImpl<std::pair<PHINode *, Constant *> > &Res,
+ SmallVectorImpl<std::pair<PHINode *, Constant *>> &Res,
const DataLayout &DL, const TargetTransformInfo &TTI) {
// The block from which we enter the common destination.
BasicBlock *Pred = SI->getParent();
@@ -4748,6 +4781,7 @@ static bool SwitchToSelect(SwitchInst *SI, IRBuilder<> &Builder,
}
namespace {
+
/// This class represents a lookup table that can be used to replace a switch.
class SwitchLookupTable {
public:
@@ -4804,7 +4838,8 @@ private:
// For ArrayKind, this is the array.
GlobalVariable *Array;
};
-}
+
+} // end anonymous namespace
SwitchLookupTable::SwitchLookupTable(
Module &M, uint64_t TableSize, ConstantInt *Offset,
@@ -5406,7 +5441,7 @@ static bool ReduceSwitchRange(SwitchInst *SI, IRBuilder<> &Builder,
// is bitwise only, we switch now to an unsigned representation.
uint64_t GCD = 0;
for (auto &V : Values)
- GCD = llvm::GreatestCommonDivisor64(GCD, (uint64_t)V);
+ GCD = GreatestCommonDivisor64(GCD, (uint64_t)V);
// This transform can be done speculatively because it is so cheap - it results
// in a single rotate operation being inserted. This can only happen if the
@@ -5416,11 +5451,11 @@ static bool ReduceSwitchRange(SwitchInst *SI, IRBuilder<> &Builder,
// FIXME: It's possible that optimizing a switch on powers of two might also
// be beneficial - flag values are often powers of two and we could use a CLZ
// as the key function.
- if (GCD <= 1 || !llvm::isPowerOf2_64(GCD))
+ if (GCD <= 1 || !isPowerOf2_64(GCD))
// No common divisor found or too expensive to compute key function.
return false;
- unsigned Shift = llvm::Log2_64(GCD);
+ unsigned Shift = Log2_64(GCD);
for (auto &V : Values)
V = (int64_t)((uint64_t)V >> Shift);
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