From: Doug Evans Date: Tue, 14 Mar 1995 18:35:45 +0000 (+0000) Subject: (arm_volatile_func): Install the government approved version of the comment. X-Git-Tag: misc/cutover-egcs-0~4775 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e82ea128f94feba3b2ecdc4596e4694f7ec60fd2;p=thirdparty%2Fgcc.git (arm_volatile_func): Install the government approved version of the comment. From-SVN: r9181 --- diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 9995b060ee70..99961becdae1 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -2719,12 +2719,11 @@ output_return_instruction (operand, really_return) return ""; } -/* Return nonzero if optimizing and the current function is volatile - (ie: `noreturn'). - Since such functions don't return call-saved registers don't need to - be saved. Making such an optimization may seem dubious at first glance. - It was put in for a particular user who was using them to do context - switching and obviously wanted it to be fast. */ +/* Return nonzero if optimizing and the current function is volatile. + Such functions never return, and many memory cycles can be saved + by not storing register values that will never be needed again. + This optimization was added to speed up context switching in a + kernel application. */ int arm_volatile_func ()