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// RUN: %clang_cc1 -fsyntax-only %s -std=c++14
// Checks that Clang doesn't crash/assert on the nested call to "kaboom"
// in "bar()".
//
// This is an interesting test case for `ExprConstant.cpp`'s `CallStackFrame`
// because it triggers the following chain of events:
// 0. `CheckEnableIf` calls `EvaluateWithSubstitution`.
// 1. The outer call to "kaboom" gets evaluated.
// 2. The expr for "a" gets evaluated, it has a version X;
// a temporary with the key (a, X) is created.
// 3. The inner call to "kaboom" gets evaluated.
// 4. The expr for "a" gets evaluated, it has a version Y;
// a temporary with the key (a, Y) is created.
// 5. The expr for "b" gets evaluated, it has a version Y;
// a temporary with the key (b, Y) is created.
// 6. `EvaluateWithSubstitution` looks at "b" but cannot evaluate it
// because it's value-dependent (due to the call to "f.foo()").
//
// When `EvaluateWithSubstitution` bails out while evaluating the outer
// call, it attempts to fetch "b"'s param slot to clean it up.
//
// This used to cause an assertion failure in `getTemporary` because
// a temporary with the key "(b, Y)" (created at step 4) existed but
// not one for "(b, X)", which is what it was trying to fetch.
template<typename T>
__attribute__((enable_if(true, "")))
T kaboom(T a, T b) {
return b;
}
struct A {
double foo();
};
template <int>
struct B {
A &f;
void bar() {
kaboom(kaboom(0.0, 1.0), f.foo());
}
};
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