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Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 5183736ccae..228af27d621 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -1084,6 +1084,12 @@ macro must evaluate to a value equal to or larger than @code{STACK_BOUNDARY}. @end defmac +@defmac INCOMING_STACK_BOUNDARY +Define this macro if the incoming stack boundary may be different +from @code{PREFERRED_STACK_BOUNDARY}. This macro must evaluate +to a value equal to or larger than @code{STACK_BOUNDARY}. +@end defmac + @defmac FUNCTION_BOUNDARY Alignment required for a function entry point, in bits. @end defmac @@ -1122,6 +1128,18 @@ field alignment has not been set by the @code{__attribute__ ((aligned (@var{n})))} construct. @end defmac +@defmac MAX_STACK_ALIGNMENT +Biggest stack alignment guaranteed by the backend. Use this macro +to specify the maximum alignment of a variable on stack. + +If not defined, the default value is @code{STACK_BOUNDARY}. + +@c FIXME: The default should be @code{PREFERRED_STACK_BOUNDARY}. +@c But the fix for PR 32893 indicates that we can only guarantee +@c maximum stack alignment on stack up to @code{STACK_BOUNDARY}, not +@c @code{PREFERRED_STACK_BOUNDARY}, if stack alignment isn't supported. +@end defmac + @defmac MAX_OFILE_ALIGNMENT Biggest alignment supported by the object file format of this machine. Use this macro to limit the alignment which can be specified using the @@ -10586,6 +10604,17 @@ call stack unwinding. It is used in declarations in @file{unwind-generic.h} and the associated definitions of those functions. @end defmac +@deftypefn {Target Hook} void TARGET_UPDATE_STACK_BOUNDARY (void) +Define this macro to update the current function stack boundary if +necessary. +@end deftypefn + +@deftypefn {Target Hook} rtx TARGET_GET_DRAP_RTX (void) +Define this macro to an rtx for Dynamic Realign Argument Pointer if a +different argument pointer register is needed to access the function's +argument list when stack is aligned. +@end deftypefn + @deftypefn {Target Hook} {bool} TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS (void) When optimization is disabled, this hook indicates whether or not arguments should be allocated to stack slots. Normally, GCC allocates |