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[PPC][NFC] add an option for GatherAllAliasesMaxDepth #87071

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Apr 2, 2024
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[PPC][NFC] add an option for GatherAllAliasesMaxDepth #87071

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6 changes: 6 additions & 0 deletions llvm/lib/Target/PowerPC/PPCISelLowering.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,10 @@ static cl::opt<unsigned> PPCMinimumJumpTableEntries(
"ppc-min-jump-table-entries", cl::init(64), cl::Hidden,
cl::desc("Set minimum number of entries to use a jump table on PPC"));

static cl::opt<unsigned> PPCGatherAllAliasesMaxDepth(
"ppc-gather-alias-max-depth", cl::init(18), cl::Hidden,
cl::desc("max depth when checking alias info in GatherAllAliases()"));

STATISTIC(NumTailCalls, "Number of tail calls");
STATISTIC(NumSiblingCalls, "Number of sibling calls");
STATISTIC(ShufflesHandledWithVPERM,
Expand Down Expand Up @@ -1512,6 +1516,8 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
// than the corresponding branch. This information is used in CGP to decide
// when to convert selects into branches.
PredictableSelectIsExpensive = Subtarget.isPredictableSelectIsExpensive();

GatherAllAliasesMaxDepth = PPCGatherAllAliasesMaxDepth;
}

// *********************************** NOTE ************************************
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