Alexey Serbin has submitted this change and it was merged. ( http://gerrit.cloudera.org:8080/21396 )
Change subject: [g++11] Fix DecrementIntCell for g++10 and g++11 ...................................................................... [g++11] Fix DecrementIntCell for g++10 and g++11 There seems to be a compiler bug, that optimizes out the safety check for INT_MIN in the DecrementIntCell function. It appears on RHEL 9.2 with g++ 11.4.1. Only in Release build. For more infoi, see: https://stackoverflow.com/questions/78424303/g-optimizes-away-check-for-int-min-in-release-build The issue seems to be fixed in g++12 and not yet present in g++9. Solution: Slightly change the function to ensure it is compiled correctly. This modification should not alter the correct optimized code. Basically, any change where the compiler cannot perform the two optimization steps (in this order) should address the issue: + if (x == INT_MIN) x = INT_MAX; else x -= 1; ====> x -= 1 (this is equivalent on the x86 platform). + if (x - 1 < x) ====> if (true) (this equivalence holds only at the mathematical level). Change-Id: Ia3cea2849a88c4d7e2587ceb805cd3258652e3c5 Reviewed-on: http://gerrit.cloudera.org:8080/21396 Tested-by: Alexey Serbin <ale...@apache.org> Reviewed-by: Alexey Serbin <ale...@apache.org> --- M src/kudu/common/key_util.cc 1 file changed, 1 insertion(+), 1 deletion(-) Approvals: Alexey Serbin: Looks good to me, approved; Verified -- To view, visit http://gerrit.cloudera.org:8080/21396 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: master Gerrit-MessageType: merged Gerrit-Change-Id: Ia3cea2849a88c4d7e2587ceb805cd3258652e3c5 Gerrit-Change-Number: 21396 Gerrit-PatchSet: 4 Gerrit-Owner: Zoltan Martonka <zmarto...@cloudera.com> Gerrit-Reviewer: Alexey Serbin <ale...@apache.org> Gerrit-Reviewer: Kudu Jenkins (120)
