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* sh.h (STRUCT_VALUE, RETURN_IN_MEMORY): Define. 

From-SVN: r32977
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J"orn Rennecke 2000-04-06 19:43:12 +00:00 committed by Joern Rennecke
parent 2f6f4b9651
commit 9b4f640b5d
2 changed files with 23 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
Thu Apr 6 20:39:26 2000 J"orn Rennecke <amylaar@cygnus.co.uk>
* sh.h (STRUCT_VALUE, RETURN_IN_MEMORY): Define.
Thu Apr 6 19:34:08 2000 J"orn Rennecke <amylaar@cygnus.co.uk>
* config/sh/lib1funcs.asm (___udivsi3_i4):

20
gcc/config/sh/sh.h
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@ -592,7 +592,25 @@ do { \
where the address is passed. If it returns 0, the address is
passed as an "invisible" first argument. */
/*#define STRUCT_VALUE ((rtx)0)*/
/* The Hitachi calling convention doesn't quite fit into this scheme since
the address is passed like an invisible argument, but one that is always
passed in memory. We approximate this by saying where the pointer is;
however, this will put any actual arguments that are passed in memory
in the wrong place.
If we wanted to implement this exactly, we'd need a STRUCT_VALUE of 0,
an extra field in CUMULATIVE_ARGS, initialize it in INIT_CUMULATIVE_ARGS,
and hack FUNCTION_VALUE / FUNCTION_ARG_ADVANCE to look directly at
DECL_RESULT of the current function in conjunction with CUM to determine
if the argument in question it is a struct value pointer, and if it is,
pass it in memory. */
#define STRUCT_VALUE \
(TARGET_HITACHI \
? gen_rtx_MEM (Pmode, arg_pointer_rtx) \
: gen_rtx_REG (Pmode, STRUCT_VALUE_REGNUM))
#define RETURN_IN_MEMORY(TYPE) \
(TYPE_MODE (TYPE) == BLKmode \
|| TARGET_HITACHI && TREE_CODE (TYPE) == RECORD_TYPE)
/* Don't default to pcc-struct-return, because we have already specified
exactly how to return structures in the RETURN_IN_MEMORY macro. */