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IA-64 patch for structure parameter passing problem
- To: gcc-patches at gcc dot gnu dot org
- Subject: IA-64 patch for structure parameter passing problem
- From: Jim Wilson <wilson at cygnus dot com>
- Date: Wed, 11 Apr 2001 13:22:31 -0700
This fixes PR 2520.
Last year, when the IA-64 ABI changed the rules for structure arguments,
I fixed 4 places affected by the change, and missed a fifth place that also
needed to change. This patch propogates the same change from my 2000-08-01
patch to one more place.
This was tested with a bootstrap and testsuite run. libstdc++ fails to
build, and many g++ testcases fail, but that is a C++ front end/dwarf2out.c
problem unrelated to the IA-64 backend.
I added the patch to both the trunk and the gcc3 release branch.
2001-04-11 Jim Wilson <wilson@redhat.com>
* config/ia64/ia64.h (FUNCTION_ARG_BOUNDARY): Return 128 if argument
requires more than 64 bits of alignment.
Index: ia64.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/ia64/ia64.h,v
retrieving revision 1.62
diff -p -r1.62 ia64.h
*** ia64.h 2001/04/04 21:24:20 1.62
--- ia64.h 2001/04/11 00:32:53
*************** do { \
*** 1382,1392 ****
/* If defined, a C expression that gives the alignment boundary, in bits, of an
argument with the specified mode and type. */
! /* Arguments larger than 64 bits require 128 bit alignment. */
#define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
! (((((MODE) == BLKmode ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \
! + UNITS_PER_WORD - 1) / UNITS_PER_WORD) > 1 ? 128 : PARM_BOUNDARY)
/* A C expression that is nonzero if REGNO is the number of a hard register in
which function arguments are sometimes passed. This does *not* include
--- 1382,1396 ----
/* If defined, a C expression that gives the alignment boundary, in bits, of an
argument with the specified mode and type. */
! /* Arguments with alignment larger than 8 bytes start at the next even
! boundary. See ia64_function_arg. */
#define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
! (((TYPE) ? (TYPE_ALIGN (TYPE) > 8 * BITS_PER_UNIT) \
! : (((((MODE) == BLKmode \
! ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \
! + UNITS_PER_WORD - 1) / UNITS_PER_WORD) > 1)) \
! ? 128 : PARM_BOUNDARY)
/* A C expression that is nonzero if REGNO is the number of a hard register in
which function arguments are sometimes passed. This does *not* include