[llvm] [AArch64][MachineCombiner] Combine sequences of gather patterns (PR #152979)

[David Green via llvm-commits]

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@@ -7412,11 +7419,335 @@ static bool getMiscPatterns(MachineInstr &Root,
   return false;
 }
 
+/// Check if a given MachineInstr `MIa` may alias with any of the instructions
+/// in `MemInstrs`.
+static bool mayAlias(const MachineInstr &MIa,
+                     SmallVectorImpl<const MachineInstr *> &MemInstrs,
+                     AliasAnalysis *AA) {
+  for (const MachineInstr *MIb : MemInstrs) {
+    if (MIa.mayAlias(AA, *MIb, /*UseTBAA*/ false)) {
+      MIb->dump();
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davemgreen wrote:

Remove dump

https://github.com/llvm/llvm-project/pull/152979