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[BOLT][NFC] Remove unused code for CDSplit (#74136)

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This diff removes JumpInfo related code that is no longer needed by
CDSplit from SplitFunctions.cpp.
This commit is contained in:
ShatianWang
2023-12-01 15:21:30 -05:00
committed by GitHub
parent f310a5d2c1
commit 296088bdf3
1 changed files with 0 additions and 31 deletions
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31
bolt/lib/Passes/SplitFunctions.cpp
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@@ -194,12 +194,6 @@ struct SplitCacheDirected final : public SplitStrategy {
}
private:
struct JumpInfo {
bool HasUncondBranch = false;
BinaryBasicBlock *CondSuccessor = nullptr;
BinaryBasicBlock *UncondSuccessor = nullptr;
};
struct CallInfo {
size_t Length;
size_t Count;
@@ -218,7 +212,6 @@ private:
DenseMap<const BinaryBasicBlock *, size_t> GlobalIndices;
DenseMap<const BinaryBasicBlock *, size_t> BBSizes;
DenseMap<const BinaryBasicBlock *, size_t> BBOffsets;
DenseMap<const BinaryBasicBlock *, JumpInfo> JumpInfos;
// Call graph.
std::vector<SmallVector<const BinaryBasicBlock *, 0>> Callers;
@@ -231,27 +224,6 @@ private:
}
void initializeAuxiliaryVariables() {
// Gather information about conditional and unconditional successors of
// each basic block; this information will be used to estimate block size
// increase due to hot-warm splitting.
auto analyzeBranches = [&](BinaryBasicBlock &BB) {
JumpInfo BBJumpInfo;
const MCSymbol *TBB = nullptr;
const MCSymbol *FBB = nullptr;
MCInst *CondBranch = nullptr;
MCInst *UncondBranch = nullptr;
if (BB.analyzeBranch(TBB, FBB, CondBranch, UncondBranch)) {
BBJumpInfo.HasUncondBranch = UncondBranch != nullptr;
if (BB.succ_size() == 1) {
BBJumpInfo.UncondSuccessor = BB.getSuccessor();
} else if (BB.succ_size() == 2) {
BBJumpInfo.CondSuccessor = BB.getConditionalSuccessor(true);
BBJumpInfo.UncondSuccessor = BB.getConditionalSuccessor(false);
}
}
return BBJumpInfo;
};
for (BinaryFunction *BF : BC.getSortedFunctions()) {
if (!shouldConsiderForCallGraph(*BF))
continue;
@@ -273,9 +245,6 @@ private:
BBOffsets[BB] = OrigHotSectionSize;
if (!BB->isSplit())
OrigHotSectionSize += BBSizes[BB];
// (Un)Conditional branch instruction information.
JumpInfos[BB] = analyzeBranches(*BB);
}
}
}