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Added -pbqp-pre-coalescing flag to PBQP. If enabled this will cause PBQP to require
LoopSplitter be run prior to register allocation. Entirely for testing purposes at the moment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108634 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -34,6 +34,7 @@
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#include "PBQP/HeuristicSolver.h"
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#include "PBQP/Graph.h"
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#include "PBQP/Heuristics/Briggs.h"
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#include "Splitter.h"
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#include "VirtRegMap.h"
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#include "VirtRegRewriter.h"
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#include "llvm/CodeGen/CalcSpillWeights.h"
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@ -65,6 +66,11 @@ pbqpCoalescing("pbqp-coalescing",
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cl::desc("Attempt coalescing during PBQP register allocation."),
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cl::init(false), cl::Hidden);
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static cl::opt<bool>
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pbqpPreSplitting("pbqp-pre-splitting",
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cl::desc("Pre-splite before PBQP register allocation."),
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cl::init(false), cl::Hidden);
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namespace {
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///
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@ -96,6 +102,8 @@ namespace {
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au.addPreserved<LiveStacks>();
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au.addRequired<MachineLoopInfo>();
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au.addPreserved<MachineLoopInfo>();
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if (pbqpPreSplitting)
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au.addRequired<LoopSplitter>();
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au.addRequired<VirtRegMap>();
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MachineFunctionPass::getAnalysisUsage(au);
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}
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