[llvm] [AMDGPU] SIPeepholeSDWA: Add REG_SEQUENCE support (PR #133087)

[Matt Arsenault via llvm-commits]

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@@ -391,21 +490,23 @@ MachineInstr *SDWASrcOperand::potentialToConvert(const SIInstrInfo *TII,
     if (!Reg->isReg() || !Reg->isDef())
       return nullptr;
 
-    for (MachineInstr &UseMI : getMRI()->use_nodbg_instructions(Reg->getReg()))
-      // Check that all instructions that use Reg can be converted
-      if (!isConvertibleToSDWA(UseMI, ST, TII) ||
-          !canCombineSelections(UseMI, TII))
+    // Check that all instructions that use Reg can be converted
+    for (MachineInstr &UseMI :
+         getMRI()->use_nodbg_instructions(Reg->getReg())) {
+      MachineInstr *SrcMI = findUseSrc(UseMI, *Reg, getMRI());
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arsenm wrote:

This is looking at the uses of Reg->getReg() inside a loop over the uses of Reg->getReg()?

https://github.com/llvm/llvm-project/pull/133087