Re: CVS commit: src/sys/arch/sparc64/include

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Sat, Apr 06, 2019 at 07:05:22AM +0900, Takeshi Nakayama wrote:
> >>> Joerg Sonnenberger <joerg%bec.de@localhost> wrote
> 
> > On Fri, Apr 05, 2019 at 12:15:41PM +0000, Takeshi Nakayama wrote:
> > > Module Name:	src
> > > Committed By:	nakayama
> > > Date:		Fri Apr  5 12:15:41 UTC 2019
> > > 
> > > Modified Files:
> > > 	src/sys/arch/sparc64/include: psl.h
> > > 
> > > Log Message:
> > > Put "memory" to asm inline reading privilege registers for clang to
> > > prevent it from being removed by excessive optimization.
> > 
> > Why excessive optimization? With the the clobber or volatile, the asm
> > statement is declared to be removable. 
> 
> With? Without?
> 
> Excessive may be overstated, but in the case of gcc it is not
> removed, so I thought so.

Sorry, I meant "without". Assembler constraints are nasty to debug,
since they often work for years...

Joerg