Merge pull request #7189 from pgavlin/x86-cmp-long

Implement long compare lowering for x86.

diff --cc src/jit/codegenxarch.cpp
Simple merge

diff --cc src/jit/lower.cpp
Simple merge

diff --cc src/jit/lowerarm64.cpp
Simple merge

diff --cc src/jit/lsra.cpp
Simple merge