SCCP miscompiles sitofp(undef) #7312
Description
| Bugzilla Link | 6940 |
| Resolution | FIXED |
| Resolved on | Apr 26, 2010 13:21 |
| Version | trunk |
| OS | All |
Extended Description
On this testcase:
define double @foo() {
%t = sitofp i32 undef to double
ret double %t
}
SCCP changes the sitofp operand to undef. This is over-aggressive, since there exist double values which sitofp cannot produce. For comparison, instcombine on this testcase changes the operand to 0.0.