Messages in this thread | | | Date | Tue, 22 Apr 2008 05:56:21 -0400 | From | Jakub Jelinek <> | Subject | Re: [PATCH] xfs: do not pass unused params to xfs_flush_pages |
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On Tue, Apr 22, 2008 at 10:57:33AM +0200, Denys Vlasenko wrote: > You do not see reduced stack usage in "make checkstack", > because "make checkstack" shows only stack usage caused by > local variables (it analyses sub %esp,NN instructions which > make room for them). Parameters also take up stack, but > they are pushed on stack with push instruction, > and so are invisible in "make checkstack" output.
That on i?86 actually depends on whether -maccumulate-outgoing-args is on or off (the default is off for -Os and most pre-i686 tunings, and on for i686 and most post-i686 tunings when not -Os).
Jakub
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