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fold-const.c (fold_single_bit_test): Convert the input to the operational intermediate type.

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* fold-const.c (fold_single_bit_test): Convert the input to the
        operational intermediate type.

From-SVN: r73077
This commit is contained in:
Richard Henderson 2003-10-29 18:26:29 -08:00 • committed by Richard Henderson
parent c35d187fc3
commit e7824b3ed5
2 changed files with 12 additions and 6 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2003-10-29 Richard Henderson <rth@redhat.com>
* fold-const.c (fold_single_bit_test): Convert the input to the
operational intermediate type.
2003-10-29 Richard Henderson <rth@redhat.com>
* builtins.c (std_build_builtin_va_list): New.

13
gcc/fold-const.c
View file

@ -5036,7 +5036,7 @@ fold_single_bit_test (enum tree_code code, tree arg0, tree arg1,
int bitnum = tree_log2 (TREE_OPERAND (arg0, 1));
enum machine_mode operand_mode = TYPE_MODE (type);
int ops_unsigned;
tree signed_type, unsigned_type;
tree signed_type, unsigned_type, intermediate_type;
tree arg00;
/* If we have (A & C) != 0 where C is the sign bit of A, convert
@ -5082,22 +5082,23 @@ fold_single_bit_test (enum tree_code code, tree arg0, tree arg1,
signed_type = (*lang_hooks.types.type_for_mode) (operand_mode, 0);
unsigned_type = (*lang_hooks.types.type_for_mode) (operand_mode, 1);
intermediate_type = ops_unsigned ? unsigned_type : signed_type;
inner = convert (intermediate_type, inner);
if (bitnum != 0)
inner = build (RSHIFT_EXPR, ops_unsigned ? unsigned_type : signed_type,
inner = build (RSHIFT_EXPR, intermediate_type,
inner, size_int (bitnum));
if (code == EQ_EXPR)
inner = build (BIT_XOR_EXPR, ops_unsigned ? unsigned_type : signed_type,
inner = build (BIT_XOR_EXPR, intermediate_type,
inner, integer_one_node);
/* Put the AND last so it can combine with more things. */
inner = build (BIT_AND_EXPR, ops_unsigned ? unsigned_type : signed_type,
inner = build (BIT_AND_EXPR, intermediate_type,
inner, integer_one_node);
/* Make sure to return the proper type. */
if (TREE_TYPE (inner) != result_type)
inner = convert (result_type, inner);
inner = convert (result_type, inner);
return inner;
}