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Re: c++0x tuple vs. pair

Ian Lance Taylor <iant@google.com> writes:
>>    tuple_test(std::tuple<A> const&):
>>            movq	(%rdi), %rax
>>            movq	(%rax), %rax
>>            jmp	*%rax
>
> This is pretty hard to justify.  Please consider filing a
> missed-optimization bug report.  Thanks.

Ok, I filed a bug.

Strangely, when I tried this test again today (same compiler version and
options, different machine), the final "extern_tuple_test" function,
which did get correctly optimized to a direct jump yesterday, resulted
in an indirect call today !  So something seems weird...

Thanks,

-Miles

-- 
"1971 pickup truck; will trade for guns"
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