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emit-rtl.c (component_ref_for_mem_expr): Try harder to find decl underneath COMPONENT_REFs.

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* emit-rtl.c (component_ref_for_mem_expr): Try harder to find decl
	underneath COMPONENT_REFs.
	(set_mem_attributes): Also strip VIEW_CONVERT_EXPR.

From-SVN: r47662
This commit is contained in:
Richard Kenner 2001-12-05 11:33:28 +00:00 committed by Richard Kenner
parent ef31d0c25e
commit c56e3582c2
2 changed files with 32 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Wed Dec 5 06:26:27 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* emit-rtl.c (component_ref_for_mem_expr): Try harder to find decl
underneath COMPONENT_REFs.
(set_mem_attributes): Also strip VIEW_CONVERT_EXPR.
2001-12-05 Neil Booth <neil@daikokuya.demon.co.uk>
* toplev.c (display_target_options): Don't print twice.

32
gcc/emit-rtl.c
View File

@ -1649,13 +1649,31 @@ component_ref_for_mem_expr (ref)
if (TREE_CODE (inner) == COMPONENT_REF)
inner = component_ref_for_mem_expr (inner);
else if (! DECL_P (inner))
inner = NULL_TREE;
else
{
tree placeholder_ptr = 0;
/* Now remove any conversions: they don't change what the underlying
object is. Likewise for SAVE_EXPR. Also handle PLACEHOLDER_EXPR. */
while (TREE_CODE (inner) == NOP_EXPR || TREE_CODE (inner) == CONVERT_EXPR
|| TREE_CODE (inner) == NON_LVALUE_EXPR
|| TREE_CODE (inner) == VIEW_CONVERT_EXPR
|| TREE_CODE (inner) == SAVE_EXPR
|| TREE_CODE (inner) == PLACEHOLDER_EXPR)
if (TREE_CODE (inner) == PLACEHOLDER_EXPR)
inner = find_placeholder (inner, &placeholder_ptr);
else
inner = TREE_OPERAND (inner, 0);
if (! DECL_P (inner))
inner = NULL_TREE;
}
if (inner == TREE_OPERAND (ref, 0))
return ref;
else
return build (COMPONENT_REF, TREE_TYPE (ref), inner, TREE_OPERAND (ref, 1));
return build (COMPONENT_REF, TREE_TYPE (ref), inner,
TREE_OPERAND (ref, 1));
}
/* Given REF, a MEM, and T, either the type of X or the expression
@ -1723,10 +1741,12 @@ set_mem_attributes (ref, t, objectp)
if (TREE_THIS_VOLATILE (t))
MEM_VOLATILE_P (ref) = 1;
/* Now remove any NOPs: they don't change what the underlying object is.
Likewise for SAVE_EXPR. */
/* Now remove any conversions: they don't change what the underlying
object is. Likewise for SAVE_EXPR. */
while (TREE_CODE (t) == NOP_EXPR || TREE_CODE (t) == CONVERT_EXPR
|| TREE_CODE (t) == NON_LVALUE_EXPR || TREE_CODE (t) == SAVE_EXPR)
|| TREE_CODE (t) == NON_LVALUE_EXPR
|| TREE_CODE (t) == VIEW_CONVERT_EXPR
|| TREE_CODE (t) == SAVE_EXPR)
t = TREE_OPERAND (t, 0);
/* If this expression can't be addressed (e.g., it contains a reference