procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

(default_conversion): Add bitfield promotions.

Browse source 
From-SVN: r12389
This commit is contained in:
Richard Kenner 1996-07-03 17:34:57 -04:00
parent 4689ad58a1
commit 9753f11368
1 changed files with 18 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
gcc/c-typeck.c
View file

@ -1010,6 +1010,24 @@ default_conversion (exp)
return convert (type, exp);
}
if (TREE_CODE (exp) == COMPONENT_REF
&& DECL_BIT_FIELD (TREE_OPERAND (exp, 1)))
{
tree width = DECL_SIZE (TREE_OPERAND (exp, 1));
HOST_WIDE_INT low = TREE_INT_CST_LOW (width);
/* If it's thinner than an int, promote it like a
C_PROMOTING_INTEGER_TYPE_P, otherwise leave it alone. */
if (low < TYPE_PRECISION (integer_type_node))
{
if ( flag_traditional && TREE_UNSIGNED (type))
return convert (unsigned_type_node, exp);
else
return convert (integer_type_node, exp);
}
}
if (C_PROMOTING_INTEGER_TYPE_P (type))
{
/* Traditionally, unsignedness is preserved in default promotions.