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mips.c (function_arg_pass_by_reference): Force to 0 in o32 and o64 ABIs.

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* config/mips/mips.c (function_arg_pass_by_reference): Force to 0
in o32 and o64 ABIs.
* config/mips/abi64.h (MUST_PASS_IN_STACK): Define as in expr.h,
but getting fixed-size structs passed in registers regardless of
padding in o32 and o64 ABIs.

From-SVN: r50480
This commit is contained in:
Alexandre Oliva 2002-03-09 06:05:27 +00:00 • committed by Alexandre Oliva
parent f1148658f1
commit 9445b81426
3 changed files with 22 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,5 +1,11 @@
2002-03-09 Alexandre Oliva <aoliva@redhat.com>
* config/mips/mips.c (function_arg_pass_by_reference): Force to 0
in o32 and o64 ABIs.
* config/mips/abi64.h (MUST_PASS_IN_STACK): Define as in expr.h,
but getting fixed-size structs passed in registers regardless of
padding in o32 and o64 ABIs.
* config/mips/mips.c (mips_va_arg): Apply big-endianness address
offset before loading address of argument passed by transparent
reference.

13
gcc/config/mips/abi64.h
View file

@ -86,6 +86,19 @@ Boston, MA 02111-1307, USA. */
|| GET_MODE_CLASS (MODE) == MODE_INT))) \
? downward : upward))
/* Modified version of the macro in expr.h. */
#define MUST_PASS_IN_STACK(MODE,TYPE) \
((TYPE) != 0 \
&& (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \
|| TREE_ADDRESSABLE (TYPE) \
|| ((MODE) == BLKmode \
&& mips_abi != ABI_32 && mips_abi != ABI_O64 \
&& ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
&& 0 == (int_size_in_bytes (TYPE) \
% (PARM_BOUNDARY / BITS_PER_UNIT))) \
&& (FUNCTION_ARG_PADDING (MODE, TYPE) \
== (BYTES_BIG_ENDIAN ? upward : downward)))))
/* Under the old (i.e., 32 and O64 ABIs) all BLKmode objects are
returned in memory. Under the new (N32 and 64-bit MIPS ABIs) small
structures are returned in a register. Objects with varying size

3
gcc/config/mips/mips.c
View file

@ -8069,6 +8069,9 @@ function_arg_pass_by_reference (cum, mode, type, named)
{
int size;
if (mips_abi == ABI_32 || mips_abi == ABI_O64)
return 0;
/* We must pass by reference if we would be both passing in registers
and the stack. This is because any subsequent partial arg would be
handled incorrectly in this case.