From 85abf9ea73c3773a167754528273c4d3c4d020df Mon Sep 17 00:00:00 2001 From: Craig Topper Date: Tue, 19 Feb 2013 03:06:17 +0000 Subject: [PATCH] Use a reference into the BlockLiveness DenseMap to avoid repeated hash lookups in collectMarkers. llvm-svn: 175484 --- llvm/lib/CodeGen/StackColoring.cpp | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/llvm/lib/CodeGen/StackColoring.cpp b/llvm/lib/CodeGen/StackColoring.cpp index bd0d809..0f1caf7 100644 --- a/llvm/lib/CodeGen/StackColoring.cpp +++ b/llvm/lib/CodeGen/StackColoring.cpp @@ -240,8 +240,11 @@ unsigned StackColoring::collectMarkers(unsigned NumSlot) { BasicBlocks[*FI] = BasicBlockNumbering.size(); BasicBlockNumbering.push_back(*FI); - BlockLiveness[*FI].Begin.resize(NumSlot); - BlockLiveness[*FI].End.resize(NumSlot); + // Keep a reference to avoid repeated lookups. + BlockLifetimeInfo &BlockInfo = BlockLiveness[*FI]; + + BlockInfo.Begin.resize(NumSlot); + BlockInfo.End.resize(NumSlot); for (MachineBasicBlock::iterator BI = (*FI)->begin(), BE = (*FI)->end(); BI != BE; ++BI) { @@ -265,15 +268,15 @@ unsigned StackColoring::collectMarkers(unsigned NumSlot) { } if (IsStart) { - BlockLiveness[*FI].Begin.set(Slot); + BlockInfo.Begin.set(Slot); } else { - if (BlockLiveness[*FI].Begin.test(Slot)) { + if (BlockInfo.Begin.test(Slot)) { // Allocas that start and end within a single block are handled // specially when computing the LiveIntervals to avoid pessimizing // the liveness propagation. - BlockLiveness[*FI].Begin.reset(Slot); + BlockInfo.Begin.reset(Slot); } else { - BlockLiveness[*FI].End.set(Slot); + BlockInfo.End.set(Slot); } } } -- 2.7.4