02f923f8e4
The Pointer class already has the capability to be a function pointer, but we still classifed function pointers as PT_FnPtr/FunctionPointer. This means when converting from a Pointer to a FunctionPointer, we lost the information of what the original Pointer pointed to.
30 lines
841 B
C++
30 lines
841 B
C++
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -o - %s -fexperimental-new-constant-interpreter | FileCheck %s
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template<typename T>
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struct Wrapper {
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T *Val;
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template<typename _Up>
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constexpr Wrapper(_Up&& __u) {
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T& __f = static_cast<_Up&&>(__u);
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Val = &__f;
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}
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constexpr T& get() const { return *Val; }
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};
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void f(){}
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int main() {
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auto W = Wrapper<decltype(f)>(f);
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if (&W.get() != &f)
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__builtin_abort();
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}
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/// We used to convert do the pointer->fnptr conversion
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/// by doing an integer conversion in between, which caused the
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/// %0 line to be:
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/// store ptr inttoptr (i64 138574454870464 to ptr), ptr %__f, align 8
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// CHECK: @_ZN7WrapperIFvvEEC2IRS0_EEOT_
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// CHECK: %0 = load ptr, ptr %__u.addr
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