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[multiple changes]

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2012-01-24  Richard Guenther  <rguenther@suse.de>

	Forward-port to trunk
	2010-09-21  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/45678
	* expr.c (expand_expr_real_1) <case VIEW_CONVERT_EXPR>: If
	op0 isn't sufficiently aligned and there is movmisalignM
	insn for mode, use it to load op0 into a temporary register.

From-SVN: r183470
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Richard Guenther 2012-01-24 09:17:01 +00:00 committed by Richard Biener
parent 93bcc8c9ff
commit a9d3ac1e89
2 changed files with 32 additions and 0 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2012-01-24 Richard Guenther <rguenther@suse.de>
Forward-port to trunk
2010-09-21 Jakub Jelinek <jakub@redhat.com>
PR middle-end/45678
* expr.c (expand_expr_real_1) <case VIEW_CONVERT_EXPR>: If
op0 isn't sufficiently aligned and there is movmisalignM
insn for mode, use it to load op0 into a temporary register.
2012-01-24 Jakub Jelinek <jakub@redhat.com>
PR target/51957

22
gcc/expr.c
View File

@ -10044,10 +10044,32 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
results. */
if (MEM_P (op0))
{
enum insn_code icode;
op0 = copy_rtx (op0);
if (TYPE_ALIGN_OK (type))
set_mem_align (op0, MAX (MEM_ALIGN (op0), TYPE_ALIGN (type)));
else if (mode != BLKmode
&& MEM_ALIGN (op0) < GET_MODE_ALIGNMENT (mode)
/* If the target does have special handling for unaligned
loads of mode then use them. */
&& ((icode = optab_handler (movmisalign_optab, mode))
!= CODE_FOR_nothing))
{
rtx reg, insn;
op0 = adjust_address (op0, mode, 0);
/* We've already validated the memory, and we're creating a
new pseudo destination. The predicates really can't
fail. */
reg = gen_reg_rtx (mode);
/* Nor can the insn generator. */
insn = GEN_FCN (icode) (reg, op0);
emit_insn (insn);
return reg;
}
else if (STRICT_ALIGNMENT
&& mode != BLKmode
&& MEM_ALIGN (op0) < GET_MODE_ALIGNMENT (mode))