Dan Gohman 005cc9c500 [WebAssembly] Fix handling of COPY instructions in WebAssemblyRegStackify.
Move RegStackify after coalescing and teach it to use LiveIntervals instead
of depending on SSA form. This avoids a problem where a register in a COPY
instruction is stackified and then subsequently coalesced with a register
that is not stackified.

This also puts it after the scheduler, which allows us to simplify the
EXPR_STACK constraint, as we no longer have instructions being reordered
after stackification and before coloring.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256402 91177308-0d34-0410-b5e6-96231b3b80d8
2015-12-25 00:31:02 +00:00
..
2015-12-18 23:46:42 +00:00
2015-12-24 08:25:00 +00:00
2015-12-17 22:09:19 +00:00