Merged r19693, r19694, r19847, r19893 into 3.24 branch.

Fix HConstants with Smi-ranged HeapNumber values

Fix for failing asserts in HBoundsCheck code generation on x64: use proper cmp operation width instead of asserting that Integer32 values should be zero extended. Similar to chromium:345820.

KeyedStoreIC miss didn't handle a transitioning case.

BUG=chromium:349878,349465,350884
LOG=N
R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/201763002

git-svn-id: https://v8.googlecode.com/svn/branches/3.24@19979 ce2b1a6d-e550-0410-aec6-3dcde31c8c00