[llvm] [SimplifyQuery] Include a context-function (NFC) (PR #225369)

[Paul Walker via llvm-commits]

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@@ -7744,7 +7741,7 @@ static Value *simplifyInstructionWithOperands(Instruction *I,
                                               const SimplifyQuery &SQ,
                                               unsigned MaxRecurse) {
   assert(I->getFunction() && "instruction should be inserted in a function");
-  assert((!SQ.CxtI || SQ.CxtI->getFunction() == I->getFunction()) &&
+  assert((!SQ.getFunction() || SQ.getFunction() == I->getFunction()) &&
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paulwalker-arm wrote:

```suggestion
  assert(SQ.getFunction() == I->getFunction() &&
```
The first assert handles the nullptr case.

https://github.com/llvm/llvm-project/pull/225369