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| author | Andrew Haley <aph@redhat.com> | 2001-07-23 16:00:06 +0000 |
|---|---|---|
| committer | Andrew Haley <aph@gcc.gnu.org> | 2001-07-23 16:00:06 +0000 |
| commit | 6e7b03e1f570004801b93a701f38ca76e8609375 (patch) | |
| tree | ef220d1f1710bdd39aaddf1da18b1709fc794695 /gcc/doc/tm.texi | |
| parent | 0dd94abd70d7b14b56d60eac7333cdd9f028d278 (diff) | |
| download | gcc-6e7b03e1f570004801b93a701f38ca76e8609375.zip gcc-6e7b03e1f570004801b93a701f38ca76e8609375.tar.gz gcc-6e7b03e1f570004801b93a701f38ca76e8609375.tar.bz2 | |
tm.texi (MD_CAN_REDIRECT_BRANCH): New macro.
2001-07-13 Andrew Haley <aph@redhat.com>
* doc/tm.texi (MD_CAN_REDIRECT_BRANCH): New macro.
* config/sh/sh.h (MD_CAN_REDIRECT_BRANCH): New macro.
* config/sh/sh.c (sh_can_redirect_branch): New function.
* config/sh/sh-protos.h (sh_can_redirect_branch): Declare.
* reorg.c (steal_delay_list_from_target): Use
MD_CAN_REDIRECT_BRANCH to see if redirection is possible.
From-SVN: r44269
Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index b5d8ba9..81a5582 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -8681,4 +8681,15 @@ ignored. This function should return the result of the call to the built-in function. @end deftypefn +@findex MD_CAN_REDIRECT_BRANCH +@item MD_CAN_REDIRECT_BRANCH(@var{branch1}, @var{branch2}) + +Take a branch insn in @var{branch1} and a another in @var{branch2}. +Return true if redirecting @var{branch1} to the destination of +@var{branch2} is possible. + +On some targets, branches may have a limited range. Optimizing the +filling of delay slots can result in branches being redirected, and this +may in turn cause a branch offset to overflow. + @end table |