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| author | Jingu Kang <jingu.kang@arm.com> | 2023-08-03 08:26:37 +0100 |
|---|---|---|
| committer | Jingu Kang <jingu.kang@arm.com> | 2023-08-07 10:06:02 +0100 |
| commit | f580901d5d30e37755212f1c09e5b587587fbfeb (patch) | |
| tree | eca48b1ab429ec245a4a72bbccb70f7848140a72 /llvm/lib/CodeGen/MachineCSE.cpp | |
| parent | 52ac71f92d38f75df5cb88e9c090ac5fd5a71548 (diff) | |
| download | llvm-f580901d5d30e37755212f1c09e5b587587fbfeb.zip llvm-f580901d5d30e37755212f1c09e5b587587fbfeb.tar.gz llvm-f580901d5d30e37755212f1c09e5b587587fbfeb.tar.bz2 | |
[MachineCSE] Add an option to override the profitability heuristics
Differential Revision: https://reviews.llvm.org/D157002
Diffstat (limited to 'llvm/lib/CodeGen/MachineCSE.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCSE.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp index f879c5f..8bd7eae 100644 --- a/llvm/lib/CodeGen/MachineCSE.cpp +++ b/llvm/lib/CodeGen/MachineCSE.cpp @@ -65,6 +65,10 @@ static cl::opt<int> CSUsesThreshold("csuses-threshold", cl::Hidden, cl::init(1024), cl::desc("Threshold for the size of CSUses")); +static cl::opt<bool> AggressiveMachineCSE( + "aggressive-machine-cse", cl::Hidden, cl::init(false), + cl::desc("Override the profitability heuristics for Machine CSE")); + namespace { class MachineCSE : public MachineFunctionPass { @@ -439,6 +443,9 @@ bool MachineCSE::isCSECandidate(MachineInstr *MI) { /// defined. bool MachineCSE::isProfitableToCSE(Register CSReg, Register Reg, MachineBasicBlock *CSBB, MachineInstr *MI) { + if (AggressiveMachineCSE) + return true; + // FIXME: Heuristics that works around the lack the live range splitting. // If CSReg is used at all uses of Reg, CSE should not increase register |