------- Comment #2 from rguenth at gcc dot gnu dot org 2005-12-01 10:53 ------- Confirmed. The first testcase is really just
short *a; void f(void) { *a = *a << 1; } interestingly, the C frontend does not do integer promotion of unsigned short *a; void f(voif) { *a = *a << 1; } where *a should be promoted to int as of 6.3.1.8 and 6.5.7/3, which says "Integer promotions are performed on each of the operands". Now the question is how to read this, but either the C frontend does unnecessary promution for the signed case or it misses it for the unsigned case. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2005-12-01 10:53:06 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25186