From a5d0ebdbc2df7326032ff57f9354b82a0bb682af Mon Sep 17 00:00:00 2001 From: "Arnaud A. de Grandmaison" Date: Tue, 21 Oct 2014 16:24:15 +0000 Subject: [PATCH] [PBQP] Fix coalescing benefits As coalescing registers is a benefit, the cost should be improved (i.e. made smaller) when coalescing is possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220302 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/RegAllocPBQP.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp index 599fbad23b6..5bd33743db0 100644 --- a/lib/CodeGen/RegAllocPBQP.cpp +++ b/lib/CodeGen/RegAllocPBQP.cpp @@ -350,7 +350,7 @@ public: if (PRegOpt < Allowed.size()) { PBQPRAGraph::RawVector NewCosts(G.getNodeCosts(NId)); - NewCosts[PRegOpt + 1] += CBenefit; + NewCosts[PRegOpt + 1] -= CBenefit; G.setNodeCosts(NId, std::move(NewCosts)); } } else { @@ -395,7 +395,7 @@ private: for (unsigned J = 0; J != Allowed2.size(); ++J) { unsigned PReg2 = Allowed2[J]; if (PReg1 == PReg2) - CostMat[I + 1][J + 1] += -Benefit; + CostMat[I + 1][J + 1] -= Benefit; } } }