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| author | Doug Evans <dje@gnu.org> | 1995-03-14 17:53:10 +0000 |
|---|---|---|
| committer | Doug Evans <dje@gnu.org> | 1995-03-14 17:53:10 +0000 |
| commit | a0b2ce4ce9bcf88a5c60ec7f138378bd62d63a35 (patch) | |
| tree | 57a53436af2e8419ffc6e28efc981616282be06d | |
| parent | d05ae115ff7d9364b5acbc01ff14333f22a679af (diff) | |
| download | gcc-a0b2ce4ce9bcf88a5c60ec7f138378bd62d63a35.zip gcc-a0b2ce4ce9bcf88a5c60ec7f138378bd62d63a35.tar.gz gcc-a0b2ce4ce9bcf88a5c60ec7f138378bd62d63a35.tar.bz2 | |
(arm_volatile_func): Add comment describing purpose.
From-SVN: r9180
| -rw-r--r-- | gcc/config/arm/arm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index cff93d2..9995b06 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -2719,6 +2719,13 @@ 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. */ + int arm_volatile_func () { |