[llvm] [llvm-mca] Teach MCA constant registers do not create dependencies (PR #89387)

[Rin Dobrescu via llvm-commits]

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@@ -749,7 +759,7 @@ InstrBuilder::createInstruction(const MCInst &MCI,
     RegID = WD.isImplicitWrite() ? WD.RegisterID
                                  : MCI.getOperand(WD.OpIndex).getReg();
     // Check if this is a optional definition that references NoReg.
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Rin18 wrote:

Good point, updated the comment.

https://github.com/llvm/llvm-project/pull/89387