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| author | Anatoly Sokolov <aesok@post.ru> | 2010-05-12 23:08:31 +0400 |
|---|---|---|
| committer | Anatoly Sokolov <aesok@gcc.gnu.org> | 2010-05-12 23:08:31 +0400 |
| commit | cbda7dc6923547363e10787e6a58dfdd5cae5954 (patch) | |
| tree | ab0664b99a156d91a202d107ee413a933ccb1249 /gcc/doc | |
| parent | dfe5f5b2b36092f0e07f3e7e58293c5e0565ced4 (diff) | |
| download | gcc-cbda7dc6923547363e10787e6a58dfdd5cae5954.zip gcc-cbda7dc6923547363e10787e6a58dfdd5cae5954.tar.gz gcc-cbda7dc6923547363e10787e6a58dfdd5cae5954.tar.bz2 | |
target.h (struct gcc_target): Add mode_dependent_address_p field.
* target.h (struct gcc_target): Add mode_dependent_address_p field.
* target-def.h (TARGET_MODE_DEPENDENT_ADDRESS_P): New.
(TARGET_INITIALIZER): Use TARGET_MODE_DEPENDENT_ADDRESS_P.
* targhooks.c (default_mode_dependent_address_p): New function.
* targhooks.h (default_mode_dependent_address_p): Declare function.
* doc/tm.texi (TARGET_MODE_DEPENDENT_ADDRESS_P): New.
(GO_IF_MODE_DEPENDENT_ADDRESS): Update.
* recog.c: (mode_dependent_address_p): Call mode_dependent_address_p
target hook. Change return type to bool.
* recog.h: (mode_dependent_address_p): Change return type to bool.
From-SVN: r159339
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/tm.texi | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 96fc62c..6a998ed 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -5609,6 +5609,22 @@ It is not necessary for this macro to come up with a legitimate address; but often a machine-dependent strategy can generate better code. @end defmac +@deftypefn {Target Hook} bool TARGET_MODE_DEPENDENT_ADDRESS_P (const_rtx @var{addr}) +This hook returns @code{true} if memory address @var{addr} can have +different meanings depending on the machine mode of the memory +reference it is used for or if the address is valid for some modes +but not others. + +Autoincrement and autodecrement addresses typically have mode-dependent +effects because the amount of the increment or decrement is the size +of the operand being addressed. Some machines have other mode-dependent +addresses. Many RISC machines have no mode-dependent addresses. + +You may assume that @var{addr} is a valid address for the machine. + +The default version of this hook returns @code{false}. +@end deftypefn + @defmac GO_IF_MODE_DEPENDENT_ADDRESS (@var{addr}, @var{label}) A C statement or compound statement with a conditional @code{goto @var{label};} executed if memory address @var{x} (an RTX) can have @@ -5622,6 +5638,9 @@ of the operand being addressed. Some machines have other mode-dependent addresses. Many RISC machines have no mode-dependent addresses. You may assume that @var{addr} is a valid address for the machine. + +These are obsolete macros, replaced by the +@code{TARGET_MODE_DEPENDENT_ADDRESS_P} target hook. @end defmac @defmac LEGITIMATE_CONSTANT_P (@var{x}) |