[llvm] [AMDGPU] Add target hook to isGlobalMemoryObject (PR #112781)

[via llvm-commits]

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@@ -1748,18 +1749,43 @@ void GCNScheduleDAGMILive::updateRegionBoundaries(
   }
 }
 
+static bool isIGLPInstr(MachineInstr *MI) {
+  switch (MI->getOpcode()) {
+  case AMDGPU::IGLP_OPT:
+  case AMDGPU::SCHED_BARRIER:
+  case AMDGPU::SCHED_GROUP_BARRIER:
+    return true;
+  default:
+    return false;
+  }
+}
+
 static bool hasIGLPInstrs(ScheduleDAGInstrs *DAG) {
   return any_of(*DAG, [](MachineBasicBlock::iterator MI) {
     unsigned Opc = MI->getOpcode();
     return Opc == AMDGPU::SCHED_GROUP_BARRIER || Opc == AMDGPU::IGLP_OPT;
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bcahoon wrote:

Why is SCHED_BARRIER left out of hasIGLPInstrs(), but is included in isIGLPInstr?

https://github.com/llvm/llvm-project/pull/112781