[llvm] [AMDGPU] Add support for point sample accel out of order returns (PR #127991)

[Jay Foad via llvm-commits]

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@@ -808,6 +812,29 @@ void WaitcntBrackets::setScoreByOperand(const MachineInstr *MI,
   setScoreByInterval(Interval, CntTy, Score);
 }
 
+// Return true if the subtarget is one that enables Point Sample Acceleration
+// and the MachineInstr passed in is one to which it might be applied (the
+// hardware makes this decision based on several factors, but we can't determine
+// this at compile time, so we have to assume it will be applied if the
+// instruction supports it).
+bool WaitcntBrackets::hasPointSampleAccel(const MachineInstr &MI) const {
+  if (!ST->hasPointSampleAccel() || !SIInstrInfo::isMIMG(MI))
+    return false;
+
+  const AMDGPU::MIMGInfo *Info = AMDGPU::getMIMGInfo(MI.getOpcode());
+  const AMDGPU::MIMGBaseOpcodeInfo *BaseInfo =
+      AMDGPU::getMIMGBaseOpcodeInfo(Info->BaseOpcode);
+  return BaseInfo->PointSampleAccel;
+}
+
+bool WaitcntBrackets::hasPointSamplePendingVmemTypes(
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jayfoad wrote:

Needs a function comment.

https://github.com/llvm/llvm-project/pull/127991