[clang] [clang] Fix segmentation fault caused by stack overflow on deeply nested expressions (PR #111701)

[Ilya Biryukov via cfe-commits]

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@@ -5817,7 +5817,10 @@ LValue CodeGenFunction::EmitHLSLArrayAssignLValue(const BinaryOperator *E) {
 
 LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E,
                                            llvm::CallBase **CallOrInvoke) {
-  RValue RV = EmitCallExpr(E, ReturnValueSlot(), CallOrInvoke);
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ilya-biryukov wrote:

Would it be better to wrap a more generic function? I'm thinking about `EmitLValue`

```cpp
LValue CodeGenFunction::EmitLValue(const Expr *E) {
  LValue R;
  R = runWithSufficientStackSpace([] { R = EmitLValueImpl(E); }, ...);
  return R;
}

// The current function...
LValue CodeGenFunction::EmitLValueImpl(const Expr *E) {
  ApplyDebugLocation DL(*this, E);
  switch (E->getStmtClass()) {
  ...
}
```

That way we can cover a broader class of recursive expressions. I'm not sure the coverage is complete,
but should probably be quite good for a start.
(We could also add a few tests for deep expressions that don't involve calls).

https://github.com/llvm/llvm-project/pull/111701