[Bug target/15191] [3.4 only] -maltivec -mabi=no-altivec results in mis-aligned lvx and stvx

["cvs-commit at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-06-10 06:39 -------
Subject: Bug 15191

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	amodra@gcc.gnu.org	2004-06-10 06:39:50

Modified files:
	gcc            : ChangeLog 
	gcc/config/rs6000: rs6000.c rs6000.h sysv4.h 

Log message:
	PR target/15191
	2004-05-15  Alan Modra  <amodra@bigpond.net.au>
	* config/rs6000/rs6000.c (rs6000_va_arg <ABI_V4>): Don't use
	UNITS_PER_WORD to calculate gpr size.  Re-instate code to set reg
	count to 8 to handle n_reg > 2.
	2004-05-10  Alan Modra  <amodra@bigpond.net.au>
	* config/rs6000/rs6000.c (function_arg_boundary): Always align
	AltiVec vectors.
	(function_arg_advance): Pass TARGET_32BIT -mabi=no-altivec AltiVec
	vectors by refererence.  Align the same for TARGET_64BIT to a 16
	byte boundary.  Remove useless code.  Add function comment.
	(function_arg): Similarly.  Move gpr rs6000_mixed_function_arg
	call to where it belongs.
	(function_arg_partial_nregs): Return true for all TARGET_32BIT
	-mabi=no-altivec AltiVec vectors.  Fix debug output.
	(rs6000_va_arg): Adjust for AltiVec change.
	2004-05-10  Alan Modra  <amodra@bigpond.net.au>
	* config/rs6000/rs6000.c (function_arg_boundary): Align for ABI_V4
	when size is 8 bytes.
	(function_arg_advance): Account for stack space used by AltiVec
	args when -mabi=altivec.  Simplify alignment calculations.  For
	ABI_V4, pass AltiVec vectors by reference when -mabi=no-altivec.
	(function_arg): Similarly.
	(function_arg_pass_by_reference): True for ABI_V4 AltiVec when
	not AltiVec ABI.
	(rs6000_va_arg): Correct fp arg test.  Adjust for AltiVec change.
	Correct alignment, and align before testing reg count.  Remove
	TREE_THIS_VOLATILE from reg.  Don't emit unused labels.
	(rs6000_complex_function_value): Check TARGET_HARD_FLOAT and
	TARGET_FPRS here..
	(rs6000_function_value): .. not here before call.
	2004-05-07  Alan Modra  <amodra@bigpond.net.au>
	* config/rs6000/rs6000.h (STACK_BOUNDARY): Use 128 bit for either
	TARGET_ALTIVEC or TARGET_ALTIVEC_ABI.
	* config/rs6000/sysv4.h (ABI_STACK_BOUNDARY): Likewise.
	(STACK_BOUNDARY): Delete.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=2.2326.2.487&r2=2.2326.2.488
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/rs6000/rs6000.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.576.2.22&r2=1.576.2.23
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/rs6000/rs6000.h.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.306.4.6&r2=1.306.4.7
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/rs6000/sysv4.h.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.144.4.2&r2=1.144.4.3



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15191