[llvm] [AMDGPU] Avoid repeated hash lookups (NFC) (PR #132583)

[Shilei Tian via llvm-commits]

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@@ -146,9 +146,10 @@ bool AMDGPUSetWavePriority::runOnMachineFunction(MachineFunction &MF) {
     bool SuccsMayReachVMEMLoad = false;
     unsigned NumFollowingVALUInsts = 0;
     for (const MachineBasicBlock *Succ : MBB->successors()) {
-      SuccsMayReachVMEMLoad |= MBBInfos[Succ].MayReachVMEMLoad;
+      MBBInfo &SuccInfo = MBBInfos[Succ];
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shiltian wrote:

const

https://github.com/llvm/llvm-project/pull/132583