[llvm] [AArch64][MachineCombiner] Reassociate long chains of accumulation instructions into a tree to increase ILP (PR #126060)

[Jonathan Cohen via llvm-commits]

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@@ -6674,6 +6675,115 @@ static bool getMaddPatterns(MachineInstr &Root,
   }
   return Found;
 }
+
+bool AArch64InstrInfo::isAccumulationOpcode(unsigned Opcode) const {
+  switch (Opcode) {
+  default:
+    break;
+  case AArch64::UABALB_ZZZ_D:
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jcohen-apple wrote:

Done

https://github.com/llvm/llvm-project/pull/126060