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| author | aesok <aesok@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-05-03 11:25:20 +0000 |
|---|---|---|
| committer | aesok <aesok@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-05-03 11:25:20 +0000 |
| commit | a4efa7dcd66f6ebb3d055098c610590085cc1f15 (patch) | |
| tree | 4dafed57bb7317168f00f322296057e74d438f5f /gcc/doc | |
| parent | d063e96b43910ddcd1a0f92f69104c8101c0026c (diff) | |
| download | gcc-a4efa7dcd66f6ebb3d055098c610590085cc1f15.tar.gz | |
* defaults.h (FRAME_POINTER_REQUIRED): Provide default.
* doc/tm.texi (FRAME_POINTER_REQUIRED): Revise documentation.
* config/alpha/alpha.h (FRAME_POINTER_REQUIRED): Delete.
* config/s390/s390.h (FRAME_POINTER_REQUIRED): Delete.
* config/spu/spu.h (FRAME_POINTER_REQUIRED): Delete.
* config/sh/sh.h (FRAME_POINTER_REQUIRED): Delete.
* config/pdp11/pdp11.h (FRAME_POINTER_REQUIRED): Delete.
* config/stormy16/stormy16.h (FRAME_POINTER_REQUIRED): Delete.
* config/m68hc11/m68hc11.h (FRAME_POINTER_REQUIRED): Delete.
* config/iq2000/iq2000.h (FRAME_POINTER_REQUIRED): Delete.
* config/mn10300/mn10300.h (FRAME_POINTER_REQUIRED): Delete.
* config/ia64/ia64.h (FRAME_POINTER_REQUIRED): Delete.
* config/m68k/m68k.h (FRAME_POINTER_REQUIRED): Delete.
* config/rs6000/rs6000.h (FRAME_POINTER_REQUIRED): Delete.
* config/picochip/picochip.h (FRAME_POINTER_REQUIRED): Delete.
* config/mcore/mcore.h (FRAME_POINTER_REQUIRED): Delete.
* config/h8300/h8300.h (FRAME_POINTER_REQUIRED): Delete.
* config/v850/v850.h (FRAME_POINTER_REQUIRED): Delete.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@147072 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/tm.texi | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 3e708ccf882..4765cf6401a 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -3738,15 +3738,16 @@ return @code{@var{regno}}. This is about eliminating the frame pointer and arg pointer. @defmac FRAME_POINTER_REQUIRED -A C expression which is nonzero if a function must have and use a frame +A C expression which is @code{true} if a function must have and use a frame pointer. This expression is evaluated in the reload pass. If its value is -nonzero the function will have a frame pointer. +@code{true} the function will have a frame pointer. The expression can in principle examine the current function and decide -according to the facts, but on most machines the constant 0 or the -constant 1 suffices. Use 0 when the machine allows code to be generated -with no frame pointer, and doing so saves some time or space. Use 1 -when there is no possible advantage to avoiding a frame pointer. +according to the facts, but on most machines the constant @code{false} or the +constant @code{true} suffices. Use @code{false} when the machine allows code +to be generated with no frame pointer, and doing so saves some time or space. +Use @code{true} when there is no possible advantage to avoiding a frame +pointer. In certain cases, the compiler does not know how to produce valid code without a frame pointer. The compiler recognizes those cases and @@ -3757,6 +3758,8 @@ them. In a function that does not require a frame pointer, the frame pointer register can be allocated for ordinary usage, unless you mark it as a fixed register. See @code{FIXED_REGISTERS} for more information. + +Default value is @code{false}. @end defmac @findex get_frame_size |