From 3844173f6e5c2d3e309d71d8980e25cca1b9305d Mon Sep 17 00:00:00 2001 From: Bob Wilson Date: Thu, 3 Jun 2010 18:28:31 +0000 Subject: Revert 105308. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105399 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineCSE.cpp | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'lib/CodeGen/MachineCSE.cpp') diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp index d8e2ec64da..6f4f7a8834 100644 --- a/lib/CodeGen/MachineCSE.cpp +++ b/lib/CodeGen/MachineCSE.cpp @@ -31,6 +31,9 @@ using namespace llvm; STATISTIC(NumCoalesces, "Number of copies coalesced"); STATISTIC(NumCSEs, "Number of common subexpression eliminated"); +static cl::opt CSEPhysDef("machine-cse-phys-defs", + cl::init(false), cl::Hidden); + namespace { class MachineCSE : public MachineFunctionPass { const TargetInstrInfo *TII; @@ -373,7 +376,7 @@ bool MachineCSE::ProcessBlock(MachineBasicBlock *MBB) { // ... Unless the CS is local and it also defines the physical register // which is not clobbered in between. - if (PhysDef) { + if (PhysDef && CSEPhysDef) { unsigned CSVN = VNT.lookup(MI); MachineInstr *CSMI = Exps[CSVN]; if (PhysRegDefReaches(CSMI, MI, PhysDef)) -- cgit v1.2.3-18-g5258