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Re: Auto-generated .rodata contents and __attribute__((section))

Hi,

On Wed, 16 May 2018, Richard Biener wrote:

> > Are constant pool entries merged at compile time or at link time? I 
> > would presume it should be done at link time because otherwise you're 
> > only merging entries within a single compilation unit (which doesn't 
> > sound that useful in a big project with hundreds of source files), 
> > right?
> 
> constant pool entries are merged at compile time.  There's no such thing
> as mergeable constant pool sections 

Actually there is in ELF.  Mergable sections can not only hold strings, 
but also fixed-size entities (e.g. 4 or 8 byte constants).  Those are 
merged content-wise at link time and references properly rewritten.  Of 
course, those still aren't per-function.


Ciao,
Michael.
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