------- Comment #2 from rguenth at gcc dot gnu dot org 2007-04-09 19:21 -------
struct tree_type {
unsigned int precision : 9;
};
void bork(unsigned int Subpart);
void foo(struct tree_type *t)
{
bork(t->precision);
}
we miss the zero extension of the argument (comparing cc1 to cc1plus output)
- movzwl %ax, %eax
- movl %eax, (%esp)
- call bork
+ movw %ax, (%esp)
+ call _Z4borkj
but it's also different on the tree level in that C uses int and C++
a bitfield type.
This is related to PR30332, but unlike that one, this one works with 4.1.x.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu dot
| |org
OtherBugsDependingO| |30332
nThis| |
Status|UNCONFIRMED |NEW
Component|c |c++
Ever Confirmed|0 |1
Keywords| |wrong-code
Last reconfirmed|0000-00-00 00:00:00 |2007-04-09 19:21:39
date| |
Summary|Miscompilation of Function |[4.2/4.3 Regression]
|Passing Bit Field Value to |Miscompilation of Function
|Function |Passing Bit Field Value to
| |Function
Target Milestone|--- |4.2.0
Version|unknown |4.2.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31513
