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| author | Bob Wilson <bob.wilson@apple.com> | 2010-06-03 18:28:31 +0000 |
|---|---|---|
| committer | Bob Wilson <bob.wilson@apple.com> | 2010-06-03 18:28:31 +0000 |
| commit | 30093b5d8b4624f7b07f93cc76c211a9b350568f (patch) | |
| tree | 683dc55ca8f11a90f970c32f7b209efae155556b /llvm/lib/CodeGen/MachineCSE.cpp | |
| parent | ca4180c92aa5c6ac4a3ccad54fcc9957d6f9ca75 (diff) | |
| download | bcm5719-llvm-30093b5d8b4624f7b07f93cc76c211a9b350568f.tar.gz bcm5719-llvm-30093b5d8b4624f7b07f93cc76c211a9b350568f.zip | |
Revert 105308.
llvm-svn: 105399
Diffstat (limited to 'llvm/lib/CodeGen/MachineCSE.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCSE.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp index d8e2ec64da8..6f4f7a88340 100644 --- a/llvm/lib/CodeGen/MachineCSE.cpp +++ b/llvm/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<bool> 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)) |
