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| author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-11-16 19:10:09 +0000 |
|---|---|---|
| committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-11-16 19:10:09 +0000 |
| commit | 2c8ff1ed92619c18ef59ae4d66a3cb7ef62de1ac (patch) | |
| tree | 9ef329c0c8bbcf96f5ead9aa89d71751793d4122 /gcc/doc | |
| parent | 07a40807d48bc44e008c55461f10e35a65e855d1 (diff) | |
| download | gcc-2c8ff1ed92619c18ef59ae4d66a3cb7ef62de1ac.tar.gz | |
* Makefile.in (expr.o): Depend on $(TARGET_H).
* target.h (return_in_msb): New target hook.
* target-def.h (TARGET_RETURN_IN_MSB): New macro.
(TARGET_CALLS): Include it.
* calls.c (shift_returned_value): New function.
(expand_call): Use it.
* expr.c: Include target.h.
(copy_blkmode_from_reg): Check targetm.calls.return_in_msb when
deciding what padding is needed. Change the name of the local
padding variable from big_endian_correction to padding_correction.
* stmt.c (shift_return_value): New function.
(expand_return): Use it. Adjust memory->register copy in the same
way as copy_blkmode_from_reg. Only change the return register's
mode if it was originally BLKmode.
* doc/tm.texi (TARGET_RETURN_IN_MSB): Document.
* config/mips/mips.c (TARGET_RETURN_IN_MSB): Define.
(mips_fpr_return_fields): New, split out from mips_function_value.
(mips_return_in_msb, mips_return_fpr_pair): New functions.
(mips_function_value): Rework to use the functions above.
* config/mips/irix6-libc-compat.c: Delete.
* config/mips/t-iris6 (LIB2FUNCS_STATIC_EXTRA): Undefine.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@73652 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/tm.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 51167f83cb8..bfb97e3ee19 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -3903,6 +3903,18 @@ need more space than is implied by @code{FUNCTION_VALUE_REGNO_P} for saving and restoring an arbitrary return value. @end defmac +@deftypefn {Target Hook} bool TARGET_RETURN_IN_MSB (tree @var{type}) +This hook should return true if values of type @var{type} are returned +at the most significant end of a register (in other words, if they are +padded at the least significant end). You can assume that @var{type} +is returned in a register; the caller is required to check this. + +Note that the register provided by @code{FUNCTION_VALUE} must be able +to hold the complete return value. For example, if a 1-, 2- or 3-byte +structure is returned at the most significant end of a 4-byte register, +@code{FUNCTION_VALUE} should provide an @code{SImode} rtx. +@end deftypefn + @node Aggregate Return @subsection How Large Values Are Returned @cindex aggregates as return values |