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

[Ilya Biryukov via cfe-commits]

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@@ -0,0 +1,1013 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - -Wstack-exhausted -verify
+
+class AClass {
+public:
+  AClass() {}
+  AClass &foo() { return *this; }
+};
+
+void test_bar() {
+  AClass a;
+  // expected-warning@* {{stack nearly exhausted; compilation time may suffer, and crashes due to stack overflow are likely}}
+  a.foo().foo().foo().foo().foo().foo().foo().foo().foo().foo().foo().foo()
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ilya-biryukov wrote:

It's not that I disagree with DAMP or always prefer DRY, I am just trying to make the best trade-off in each situation and also feel the right trade-off one here is closer to DRY.

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