[llvm] [AMDGPU] Classify FLAT instructions as VMEM (PR #137148)

[Robert Imschweiler via llvm-commits]

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@@ -1425,8 +1418,8 @@ static bool shouldRunLdsBranchVmemWARHazardFixup(const MachineFunction &MF,
   for (auto &MBB : MF) {
     for (auto &MI : MBB) {
       HasLds |= SIInstrInfo::isDS(MI);
-      HasVmem |=
-          SIInstrInfo::isVMEM(MI) || SIInstrInfo::isSegmentSpecificFLAT(MI);
+      HasVmem |= (SIInstrInfo::isVMEM(MI) && !SIInstrInfo::isFLAT(MI)) ||
+                 SIInstrInfo::isSegmentSpecificFLAT(MI);
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ro-i wrote:

This is addressed by #137170 because otherwise this PR wouldn't be NFC anymore

https://github.com/llvm/llvm-project/pull/137148