[llvm-bugs] [Bug 50735] Missing optimization for member function with const attribute
via llvm-bugs
llvm-bugs at lists.llvm.org
Thu Jun 17 05:44:09 PDT 2021
https://bugs.llvm.org/show_bug.cgi?id=50735
Allen zhong <zhongyunde at tom.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |---
Status|RESOLVED |REOPENED
--- Comment #2 from Allen zhong <zhongyunde at tom.com> ---
thanks for your answer.
how about the following new case.
As member functions const will not change the member variable, so the value
nPair.bins[0] will not change in function exclusion, then we can assert the
return value must be true?
class NPair /*: protected Pointers */ {
public:
int bins[10];
int exclusion(int n) const;
// int exclusion(int n) __attribute__((const));
};
// extern int * __restrict bins;
extern class NPair nPair;
int foo (void)
{
int tmp = nPair.bins[0];
nPair.exclusion(1);
return tmp == nPair.bins[0];
}
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