[cfe-dev] When two functions are the same could clang optimize out one of them?

[Csaba Raduly]

On Tue, Mar 8, 2011 at 6:55 AM, 邓尧  wrote:
> Hi,
> When the generated instructions of two functions "f()" & "g()" are the
> same(when templates are used it isn't unusual), could clang remove the
> function "f()" in the object file and translate "f()" calls to "g()" calls?

Templates aren't even needed. At least on x86, accessor functions like

int getFoo() const { return m_foo; }

all boil down to "return *(this + offset)". I've seen Visual C++ 7.1
merge these functions across different classes during optimization. I
was quite the WTF moment during debugging.

Csaba
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