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Added -pbqp-pre-coalescing flag to PBQP. If enabled this will cause PBQP to require

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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
This commit is contained in:
Lang Hames 2010-07-18 00:57:59 +00:00
parent aa7e8b27ad
commit 12f35c52a5
1 changed files with 8 additions and 0 deletions
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8
lib/CodeGen/RegAllocPBQP.cpp
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@ -34,6 +34,7 @@
#include "PBQP/HeuristicSolver.h"
#include "PBQP/Graph.h"
#include "PBQP/Heuristics/Briggs.h"
#include "Splitter.h"
#include "VirtRegMap.h"
#include "VirtRegRewriter.h"
#include "llvm/CodeGen/CalcSpillWeights.h"
@ -65,6 +66,11 @@ pbqpCoalescing("pbqp-coalescing",
cl::desc("Attempt coalescing during PBQP register allocation."),
cl::init(false), cl::Hidden);
static cl::opt<bool>
pbqpPreSplitting("pbqp-pre-splitting",
cl::desc("Pre-splite before PBQP register allocation."),
cl::init(false), cl::Hidden);
namespace {
///
@ -96,6 +102,8 @@ namespace {
au.addPreserved<LiveStacks>();
au.addRequired<MachineLoopInfo>();
au.addPreserved<MachineLoopInfo>();
if (pbqpPreSplitting)
au.addRequired<LoopSplitter>();
au.addRequired<VirtRegMap>();
MachineFunctionPass::getAnalysisUsage(au);
}