[llvm] [AMDGPU][True16][MC] validate op_sel and .l/.h syntax (PR #123250)

[Brox Chen via llvm-commits]

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@@ -5132,6 +5171,11 @@ bool AMDGPUAsmParser::validateInstruction(const MCInst &Inst,
     Error(getRegLoc(LDS_DIRECT, Operands), *ErrMsg);
     return false;
   }
+  if (!validateTrue16OpSel(Inst)) {
+    Error(getImmLoc(AMDGPUOperand::ImmTyOpSel, Operands),
+          "op_sel operand conflicts with 16-bit operand suffix");
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broxigarchen wrote:

added a test file

https://github.com/llvm/llvm-project/pull/123250