From f10711fb8c8b5596e973bcc27b5af6203fec34b4 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Mon, 27 Jun 2011 23:40:45 +0000
Subject: Remove the experimental (and unused) pre-ra splitting pass. Greedy
 regalloc can split live ranges.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133962 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegAllocLinearScan.cpp | 9 ---------
 1 file changed, 9 deletions(-)

(limited to 'lib/CodeGen/RegAllocLinearScan.cpp')

diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 2ad0747038..0dd3c598c1 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -57,11 +57,6 @@ NewHeuristic("new-spilling-heuristic",
              cl::desc("Use new spilling heuristic"),
              cl::init(false), cl::Hidden);
 
-static cl::opt<bool>
-PreSplitIntervals("pre-alloc-split",
-                  cl::desc("Pre-register allocation live interval splitting"),
-                  cl::init(false), cl::Hidden);
-
 static cl::opt<bool>
 TrivCoalesceEnds("trivial-coalesce-ends",
                   cl::desc("Attempt trivial coalescing of interval ends"),
@@ -104,7 +99,6 @@ namespace {
       initializeRegisterCoalescerPass(
         *PassRegistry::getPassRegistry());
       initializeCalculateSpillWeightsPass(*PassRegistry::getPassRegistry());
-      initializePreAllocSplittingPass(*PassRegistry::getPassRegistry());
       initializeLiveStacksPass(*PassRegistry::getPassRegistry());
       initializeMachineDominatorTreePass(*PassRegistry::getPassRegistry());
       initializeMachineLoopInfoPass(*PassRegistry::getPassRegistry());
@@ -217,8 +211,6 @@ namespace {
       // to coalescing and which analyses coalescing invalidates.
       AU.addRequiredTransitive<RegisterCoalescer>();
       AU.addRequired<CalculateSpillWeights>();
-      if (PreSplitIntervals)
-        AU.addRequiredID(PreAllocSplittingID);
       AU.addRequiredID(LiveStacksID);
       AU.addPreservedID(LiveStacksID);
       AU.addRequired<MachineLoopInfo>();
@@ -401,7 +393,6 @@ INITIALIZE_PASS_BEGIN(RALinScan, "linearscan-regalloc",
 INITIALIZE_PASS_DEPENDENCY(LiveIntervals)
 INITIALIZE_PASS_DEPENDENCY(StrongPHIElimination)
 INITIALIZE_PASS_DEPENDENCY(CalculateSpillWeights)
-INITIALIZE_PASS_DEPENDENCY(PreAllocSplitting)
 INITIALIZE_PASS_DEPENDENCY(LiveStacks)
 INITIALIZE_PASS_DEPENDENCY(MachineLoopInfo)
 INITIALIZE_PASS_DEPENDENCY(VirtRegMap)
-- 
cgit v1.2.3-18-g5258