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Added an option to have the PBQP allocator attempt coalescing during allocation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79397 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2009-08-19 01:36:14 +00:00
parent 021d664a38
commit 8481e3b368
1 changed files with 10 additions and 1 deletions
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11
lib/CodeGen/RegAllocPBQP.cpp
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@ -59,6 +59,11 @@ static RegisterRegAlloc
registerPBQPRepAlloc("pbqp", "PBQP register allocator.",
llvm::createPBQPRegisterAllocator);
static cl::opt<bool>
pbqpCoalescing("pbqp-coalescing",
cl::desc("Attempt coalescing during PBQP register allocation."),
cl::init(false), cl::Hidden);
namespace {
///
@ -537,7 +542,11 @@ PBQP::SimpleGraph PBQPRegAlloc::constructPBQPProblem() {
}
// Get the set of potential coalesces.
CoalesceMap coalesces;//(findCoalesces());
CoalesceMap coalesces;
if (pbqpCoalescing) {
coalesces = findCoalesces();
}
// Construct a PBQP solver for this problem
PBQP::SimpleGraph problem;