[clang] [flang] [llvm] [AMDGPU] Add "lds-buffer-load-insts" attribute for all targets < gfx11 (PR #133055)

[Pierre van Houtryve via llvm-commits]

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@@ -3368,7 +3368,8 @@ bool AMDGPUInstructionSelector::selectG_INSERT_VECTOR_ELT(
 }
 
 bool AMDGPUInstructionSelector::selectBufferLoadLds(MachineInstr &MI) const {
-  assert(!AMDGPU::isGFX12Plus(STI));
+  if (!Subtarget->hasLDSBufferLoad())
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Pierre-vh wrote:

Can we add a test to verify lowering fails (`not llc`) instead of crashing if there is no attr?

https://github.com/llvm/llvm-project/pull/133055