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| author | Tom de Vries <tom@codesourcery.com> | 2014-06-20 18:28:12 +0000 |
|---|---|---|
| committer | Tom de Vries <vries@gcc.gnu.org> | 2014-06-20 18:28:12 +0000 |
| commit | 73b3e61bca04df93fcba001702c469deeed6a06d (patch) | |
| tree | e0f9f44bb935fb127d731ec2456988bcbd942062 /gcc/doc/tm.texi | |
| parent | 676d89dd0f84823db929854671bf45573aa30b01 (diff) | |
| download | gcc-73b3e61bca04df93fcba001702c469deeed6a06d.zip gcc-73b3e61bca04df93fcba001702c469deeed6a06d.tar.gz gcc-73b3e61bca04df93fcba001702c469deeed6a06d.tar.bz2 | |
Update definition of call_fusage_contains_non_callee_clobbers
2014-06-20 Tom de Vries <tom@codesourcery.com>
* target.def (call_fusage_contains_non_callee_clobbers): Update
definition.
* doc/tm.texi: Regenerate.
From-SVN: r211852
Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index c272630..45281ae 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -4884,14 +4884,14 @@ Whether this target supports splitting the stack when the options described in @ @cindex miscellaneous register hooks @deftypevr {Target Hook} bool TARGET_CALL_FUSAGE_CONTAINS_NON_CALLEE_CLOBBERS -set to true if all the calls in the current function contain clobbers in -CALL_INSN_FUNCTION_USAGE for the registers that are clobbered by the call -rather than by the callee, and are not already set or clobbered in the call -pattern. Examples of such registers are registers used in PLTs and stubs, -and temporary registers used in the call instruction but not present in the -rtl pattern. Another way to formulate it is the registers not present in the -rtl pattern that are clobbered by the call assuming the callee does not -clobber any register. The default version of this hook is set to false. +Set to true if each call that binds to a local definition explicitly +clobbers or sets all non-fixed registers modified by performing the call. +That is, by the call pattern itself, or by code that might be inserted by the +linker (e.g. stubs, veneers, branch islands), but not including those +modifiable by the callee. The affected registers may be mentioned explicitly +in the call pattern, or included as clobbers in CALL_INSN_FUNCTION_USAGE. +The default version of this hook is set to false. The purpose of this hook +is to enable the fuse-caller-save optimization. @end deftypevr @node Varargs |