GitLab

[wip] let backend know about exception flow. also add one more test to see if callee-saved register is restored
during catching exception, the test failed (and I marked it as ignored).

liveins

(for calling convention)

No regression, but new tests still doesn't run. Marked them
as expect fail or skip. Going to work on them later.

a jump that directly is directly followed by a label of its target
can be removed.

1. grow/shrink frame size in the pro/epilogue. Note: though we removed
push/pop for unused callee saved registers, we still reserve frame space
for them. Because we generate spill on frame before we know exactly how
large a space is. The solution is to make spill locations patchable.
2. control flow will combine branches in switch instruction if they all
target the same destination.

(for callee saved regs, we insert push/pop before reg alloc. and
after allocation, remove unnecessary ones)

convention(stack args), and need to optimize spill1 code

partially serialize compiled function into bootimage

(for blocks created during instruction selection)