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| author | Kazu Hirata <kazu@google.com> | 2024-01-23 09:27:18 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-01-23 09:27:18 -0800 |
| commit | 8ed1291d96eaf230ce289c9e62d28df3851d4372 (patch) | |
| tree | ccf4aca75865dd3711ccffe66b61c439f633a05b | |
| parent | 2531a15dfd4eafda21622e3a828a93fc9a27e3b6 (diff) | |
| download | llvm-8ed1291d96eaf230ce289c9e62d28df3851d4372.zip llvm-8ed1291d96eaf230ce289c9e62d28df3851d4372.tar.gz llvm-8ed1291d96eaf230ce289c9e62d28df3851d4372.tar.bz2 | |
[MachineCopyPropagation] Make a SmallVector larger (NFC) (#79106)
This patch makes a SmallVector slightly larger. We encounter quite a
few instructions with 3 or 4 defs but very few beyond that on X86.
This saves 0.39% of heap allocations during the compilation of a large
preprocessed file, namely X86ISelLowering.cpp, for the X86 target.
| -rw-r--r-- | llvm/lib/CodeGen/MachineCopyPropagation.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp index 51e944d..9a0ab30 100644 --- a/llvm/lib/CodeGen/MachineCopyPropagation.cpp +++ b/llvm/lib/CodeGen/MachineCopyPropagation.cpp @@ -853,7 +853,7 @@ void MachineCopyPropagation::ForwardCopyPropagateBlock(MachineBasicBlock &MBB) { forwardUses(MI); // Not a copy. - SmallVector<Register, 2> Defs; + SmallVector<Register, 4> Defs; const MachineOperand *RegMask = nullptr; for (const MachineOperand &MO : MI.operands()) { if (MO.isRegMask()) |