simplifyIfs js optimizer pass
filter out empty blocks in simplifyIfs
add test_simplify_ifs
add another if testcase in relooper
remove unnecessary code from simplifyIfs
uncommaify between ifs that can potentially be simplified
simplify nested ifs with identical elses
don't commaify if it doesn't help
fuse elses to remove unnecessary label settings and checks, after we simplified ifs
comment on outlining downsides
fix else fusing when label has multiple assigns or checks
make simplifyIfs a settings option
fuse if-elses where the relooper did not emit a label clearing
flip in simplifyElses if it can help
flip a non-existent else block in simplifyIfs, if adding such a block can help
add ifs benchmark