8078669: G1 applies SurvivorAlignmentInBytes to both survivor and old gen Summary: After refactoring of the relevant code in JDK-8060025 the survivor alignment had been applied to any allocation within PLABs. Only do that for survivor allocations again. Improve the related tests to have less variance. Reviewed-by: jmasa, fzhinkin

8079315: UseCondCardMark broken in conjunction with CMS precleaning on x86 Summary: Add the necessary StoreLoad barrier in interpreter, C1 and C2 for x86 Reviewed-by: tschatzl