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Added an option to have the PBQP allocator attempt coalescing during allocation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79397 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -59,6 +59,11 @@ static RegisterRegAlloc
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registerPBQPRepAlloc("pbqp", "PBQP register allocator.",
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llvm::createPBQPRegisterAllocator);
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static cl::opt<bool>
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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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namespace {
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///
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@ -537,7 +542,11 @@ PBQP::SimpleGraph PBQPRegAlloc::constructPBQPProblem() {
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}
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// Get the set of potential coalesces.
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CoalesceMap coalesces;//(findCoalesces());
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CoalesceMap coalesces;
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if (pbqpCoalescing) {
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coalesces = findCoalesces();
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}
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// Construct a PBQP solver for this problem
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PBQP::SimpleGraph problem;
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