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expr.c (expand_expr): When testing for unaligned objects...

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* expr.c (expand_expr) <normal_inner_ref>: When testing for unaligned
	objects, take into account only the alignment of 'op0' and 'mode1' if
	'op0' is a MEM.

From-SVN: r249811
This commit is contained in:
Eric Botcazou 2017-06-29 19:21:25 +00:00 committed by Eric Botcazou
parent 74582a3e2e
commit 3ba358bf20
2 changed files with 11 additions and 5 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-06-29 Eric Botcazou <ebotcazou@adacore.com>
* expr.c (expand_expr) <normal_inner_ref>: When testing for unaligned
objects, take into account only the alignment of 'op0' and 'mode1' if
'op0' is a MEM.
2017-06-29 Steve Ellcey <sellcey@cavium.com>
* ccmp.c (ccmp_tree_comparison_p): New function.

10
gcc/expr.c
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@ -10639,11 +10639,11 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
/* If the field isn't aligned enough to fetch as a memref,
fetch it as a bit field. */
|| (mode1 != BLKmode
&& (((TYPE_ALIGN (TREE_TYPE (tem)) < GET_MODE_ALIGNMENT (mode)
|| (bitpos % GET_MODE_ALIGNMENT (mode) != 0)
|| (MEM_P (op0)
&& (MEM_ALIGN (op0) < GET_MODE_ALIGNMENT (mode1)
|| (bitpos % GET_MODE_ALIGNMENT (mode1) != 0))))
&& (((MEM_P (op0)
? MEM_ALIGN (op0) < GET_MODE_ALIGNMENT (mode1)
|| (bitpos % GET_MODE_ALIGNMENT (mode1) != 0)
: TYPE_ALIGN (TREE_TYPE (tem)) < GET_MODE_ALIGNMENT (mode)
|| (bitpos % GET_MODE_ALIGNMENT (mode) != 0))
&& modifier != EXPAND_MEMORY
&& ((modifier == EXPAND_CONST_ADDRESS
|| modifier == EXPAND_INITIALIZER)