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re PR tree-optimization/47239 ((int)&func & 3 is always optimized to 0 on some targets) 

2011-01-11  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/47239
	* tree-ssa-ccp.c (get_value_from_alignment): Punt for FUNCTION_DECLs.

From-SVN: r168661
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Richard Guenther 2011-01-11 14:23:20 +00:00 committed by Richard Biener
parent 9f9ca914cc
commit e98965af89
2 changed files with 9 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-01-11 Richard Guenther <rguenther@suse.de>
PR tree-optimization/47239
* tree-ssa-ccp.c (get_value_from_alignment): Punt for FUNCTION_DECLs.
2011-01-11 Jeff Law <law@redhat.com> 2011-01-11 Jeff Law <law@redhat.com>
* PR tree-optimization/47086 * PR tree-optimization/47086

4
gcc/tree-ssa-ccp.c
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@ -522,6 +522,10 @@ get_value_from_alignment (tree expr)
val = bit_value_binop (PLUS_EXPR, TREE_TYPE (expr), val = bit_value_binop (PLUS_EXPR, TREE_TYPE (expr),
TREE_OPERAND (base, 0), TREE_OPERAND (base, 1)); TREE_OPERAND (base, 0), TREE_OPERAND (base, 1));
else if (base else if (base
/* ??? While function decls have DECL_ALIGN their addresses
may encode extra information in the lower bits on some
targets (PR47239). Simply punt for function decls for now. */
&& TREE_CODE (base) != FUNCTION_DECL
&& ((align = get_object_alignment (base, BIGGEST_ALIGNMENT)) && ((align = get_object_alignment (base, BIGGEST_ALIGNMENT))
> BITS_PER_UNIT)) > BITS_PER_UNIT))
{ {