[llvm] [TableGen][InstrInfoEmitter] Count sub-operands on def operands (PR #88837)

[via llvm-commits]

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+// RUN: llvm-tblgen -gen-instr-info -I %p/../../include %s | FileCheck %s
+
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darkbuck wrote:

Done, this test checks whether the `MCInstrDesc` entry for `InstA` has the expected `NumOperands` and `NumDefs`. It should have 3 defs out of 4 operands.

https://github.com/llvm/llvm-project/pull/88837