GitLab

a function

--disable-inline

replacing most uses of HashMap with LinkedHashMap. This will reduce (if not eliminate) undeterminism in the compilation.
Copied LinkedHashMap implementation to local so that I can implement encode/decode and other necessary methods

1. asm call do not use all argument registers (otherwise it will keep
them alive)
2. spilling a register that is used and defined in one instruction will
result in creating one new temporary, instead of two
3. spilling now deals with floating point
4. SELECT with int8 is implemented using conditional jump (cmov cannot
take reg8)
5. postcall convention now deals correctly with fp return values
6. reg alloc conservative() was wrong in a few commits ago, fixed it
7. in liveness analysis, when finding a move between a temp and a
register, find the color for the register (such as RAX for EAX)

currently mov constant as imm to a GPR, then mov from GPR
to xmm. A better approach should be put the immediate in memroy,
and load it

changed a condition on coealescing. Fixed a bug in spilling rewrite.
Currently test_extern_Func is broken

was using nalgebra::DMatrix to implement a graph

now

we never go back to previous passes, since it is not necessary

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

now we have 4 passes: fast_inst_sel, fast_reg_alloc, followed
by slow_inst_sel and slow_reg_alloc. This might make the
compilation pipeline more linear

some refactoring: 1. allows reg alloc using other allocators (other than graph coloring), 2. allows retreat to a previous compilation pass