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| author | Kazu Hirata <kazu@google.com> | 2025-01-20 10:13:08 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-01-20 10:13:08 -0800 |
| commit | bc1e699d9fb52548c1bc2420f10929473a4c3908 (patch) | |
| tree | 323d38da2f083b70556c0bdd2cb7be111813e62f /llvm/lib/CodeGen/MachineCopyPropagation.cpp | |
| parent | cac3f5ecb972194322aeeb8e84e7c7dd60dedef8 (diff) | |
| download | llvm-bc1e699d9fb52548c1bc2420f10929473a4c3908.zip llvm-bc1e699d9fb52548c1bc2420f10929473a4c3908.tar.gz llvm-bc1e699d9fb52548c1bc2420f10929473a4c3908.tar.bz2 | |
[CodeGen] Avoid repeated hash lookups (NFC) (#123557)
Diffstat (limited to 'llvm/lib/CodeGen/MachineCopyPropagation.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCopyPropagation.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp index 0afd73d..d44b064 100644 --- a/llvm/lib/CodeGen/MachineCopyPropagation.cpp +++ b/llvm/lib/CodeGen/MachineCopyPropagation.cpp @@ -127,11 +127,11 @@ public: BitVector &getPreservedRegUnits(const MachineOperand &RegMaskOp, const TargetRegisterInfo &TRI) { const uint32_t *RegMask = RegMaskOp.getRegMask(); - auto Existing = RegMaskToPreservedRegUnits.find(RegMask); - if (Existing != RegMaskToPreservedRegUnits.end()) { - return Existing->second; + auto [It, Inserted] = RegMaskToPreservedRegUnits.try_emplace(RegMask); + if (!Inserted) { + return It->second; } else { - BitVector &PreservedRegUnits = RegMaskToPreservedRegUnits[RegMask]; + BitVector &PreservedRegUnits = It->second; PreservedRegUnits.resize(TRI.getNumRegUnits()); for (unsigned SafeReg = 0, E = TRI.getNumRegs(); SafeReg < E; ++SafeReg) |