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Re: Reload patch for PA call rewrite.
- From: Zack Weinberg <zack at codesourcery dot com>
- To: law at redhat dot com
- Cc: John David Anglin <dave at hiauly1 dot hia dot nrc dot ca>, rth at redhat dot com, gcc-patches at gcc dot gnu dot org
- Date: 17 Nov 2002 22:48:33 -0800
- Subject: Re: Reload patch for PA call rewrite.
- Organization: CodeSourcery, LLC
- References: <200211172348.gAHNmdBk003846@porcupine.cygnus.com>
On Sun, 2002-11-17 at 15:48, Jeff Law wrote:
> For the hardware managed BTS machines we should probably disable sibling
> call optimizations as they'll scrog the BTS.
I don't see how this would happen. Sibcall optimization takes
a:
...
call b
ret
b:
...
ret
and turns it into
a:
...
jmp b
b:
...
ret
Afterward, it's as if there was one long function with an unconditional
jump in the middle. How does this scrog the BTS?
zw