Bug 1284451
Summary: | gcc on x86_64 has bug in __builtin_clz() | ||
---|---|---|---|
Product: | Red Hat Enterprise Linux 6 | Reporter: | Håkon Bugge <Haakon.Bugge> |
Component: | gcc | Assignee: | Jakub Jelinek <jakub> |
Status: | CLOSED NOTABUG | QA Contact: | qe-baseos-tools-bugs |
Severity: | medium | Docs Contact: | |
Priority: | unspecified | ||
Version: | 6.6 | CC: | mfranc, mpolacek |
Target Milestone: | rc | ||
Target Release: | --- | ||
Hardware: | x86_64 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2015-11-23 12:17:33 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Håkon Bugge
2015-11-23 11:33:55 UTC
-- Built-in Function: int __builtin_clz (unsigned int x) Returns the number of leading 0-bits in X, starting at the most significant bit position. If X is 0, the result is undefined. So, if the only differences you are seeing is on __builtin_clz (0), then the problem is in the testcase. Just realized I did not read the documentation properly.__builtin_clz() has undefined output when input is zero. My bad. Please close as not a bug. |