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Author SHA1 Message Date
David Given e4fec71f9c Lots more opcodes; better eviction behaviour; better register moves. Lots more 
PowerPC stuff (some working).
 2016-10-19 23:29:05 +02:00
David Given ffb1eabf45 Floating point promotion is less buggy. 2016-10-19 23:27:53 +02:00
David Given d5071e7df1 Promote values accessed via NOP. 2016-10-18 23:58:03 +02:00
David Given 5413d47029 '!' tracing is now always emitted; tracing goes to stderr. 2016-10-18 22:32:09 +02:00
David Given 3520704ea8 Add support for floating point constants. 2016-10-18 22:29:42 +02:00
David Given 938fb8c2fc Lots more opcodes. 2016-10-18 00:31:26 +02:00
David Given 5f0164db62 Bolt mcg into the PowerPC backend. It doesn't build yet, but it is generating 
*some* code.
 2016-10-17 00:06:06 +02:00
David Given 1e17921208 Implement saving of dirty registers onto the stack. 2016-10-16 22:37:42 +02:00
David Given 6a23906ad8 Various bits of cleanup; we should almost be ready to try sending this to the 
assembler soon...
 2016-10-15 23:39:38 +02:00
David Given 286435a2ed Oops, forgot to add the output option spec to the string! 2016-10-15 23:34:54 +02:00
David Given b36897c299 References to the stack frame are now rendered properly. 2016-10-15 23:33:30 +02:00
David Given a8ee82d197 Stop passing proc around, and use a global instead --- much cleaner. 2016-10-15 23:19:44 +02:00
David Given 7aa60a6451 Register spilling to the stack frame works, more or less. 2016-10-15 22:53:56 +02:00
David Given 0eb32e7553 Fix yet another bug to do with IR register outputs. 2016-10-15 19:14:25 +02:00
David Given 9504aec2bd Function termination gets routed through an exit block; we now have prologues 
and epilogues. mcgg now exports some useful data as headers. Start factoring
out some of the architecture-specific bits into an architecture-specific file.
 2016-10-15 18:38:46 +02:00
David Given 5ad3aa8595 Add a pile of new instructions used by Pascal; I'm going to need to think about 
how locals and the local base are handled.
 2016-10-15 13:07:59 +02:00
David Given 358c44de35 Bytes were sometimes failing to be sign extended correctly. 2016-10-15 12:11:40 +02:00
David Given 517120d0fb Allow asm names for registers which are different from the friendly names shown 
in the tracing (because PowerPC register names are just numbers).
 2016-10-15 11:42:47 +02:00
David Given b2ddf12473 Some more opcodes. 2016-10-15 11:22:40 +02:00
David Given bb17aea73a You can now mark a register as corrupting a certain register class; calls work, 
or at least look like they work. The bad news is that the register allocator
has a rare talent for putting things in the wrong register.
 2016-10-15 01:15:08 +02:00
David Given 886adb86d7 Log empty hops. 2016-10-14 23:19:25 +02:00
David Given 4f2177e41f Reworked loads and stores; it's now *different*, maybe not better. 2016-10-14 23:19:02 +02:00
David Given a63052427e Factor out the register allocation routines to make them easier to deal with. 2016-10-14 23:17:06 +02:00
David Given bb53a7fb51 Fix stupid issue where hop output registers were being overwritten, leading to 
invalid SSA form.
 2016-10-14 23:12:29 +02:00
David Given 98fe70a7de Output register equality constraints work. 2016-10-14 22:17:02 +02:00
David Given 216ff5cc43 Make loads and stores in the table nicer; fix a place where it looked like it 
was working but only accidentally.
 2016-10-12 23:12:53 +02:00
David Given f06b51c981 Keep track of register types as well as attributes --- the type being how we 
find new registers when evicting values. Input constraints work (they were
being ignored before). Various bug fixing so they actually work.
 2016-10-12 22:58:46 +02:00
David Given 4723a1442f Add code to remove unused phis, converting to pruned SSA form, to avoid 
confusing the register allocator later.
 2016-10-12 21:50:12 +02:00
David Given df239b3f90 Don't allow the same IR to be added to the sequence list more than once 
(sometimes happens because op_dup, but makes no sense).
 2016-10-12 00:45:36 +02:00
David Given 96dffd2007 Clean up the allocator a bit, in preparation for making it lots more 
complicated; no semantic changes.
 2016-10-11 23:17:30 +02:00
David Given 668cccdff1 A few more opcodes. 2016-10-11 00:29:18 +02:00
David Given 2be1c51885 A little fiddling with store instructions. The PowerPC is not friendly to 
iburg.
 2016-10-11 00:23:35 +02:00
David Given e93c58dc8d Refactored the way hops are rendered; add support for emitting code (although 
with no prologue or epilogue yet).
 2016-10-11 00:12:11 +02:00
David Given 92bd1ac5f4 Register allocator now gets all the way through all of my test file without 
crashing (albeit with register moves and swaps stubbed out). Correct code? Who
knows.
 2016-10-10 23:19:46 +02:00
David Given a4d06d1795 D'oh, need multiple passes over the edge splitter in order to properly find all 
cases.
 2016-10-10 23:18:37 +02:00
David Given fac12aae32 Calculate phi congruency groups; use them to solve the 
importing-hreg-from-the-future problem (probably poorly).
 2016-10-09 22:04:20 +02:00
David Given 23c3575f0f The register allocator now makes a spirited attempt to honour register 
attributes when allocating. Unfortunately, backward edges don't work (because
the limited def-use chain stuff doesn't work across basic blocks). Needs more
thought.
 2016-10-09 15:09:34 +02:00
David Given 38de688c5a Floating point promotion was broken since the IR float change. Fix. 2016-10-09 15:08:03 +02:00
David Given 36cddd6afb Add some more opcodes; rearrange the registers to be more PowerPC-friendly. 2016-10-09 14:45:13 +02:00
David Given cfe5312fcc Predicates can now take numeric arguments. The PowerPC predicates have been 
turned into generic ones (as they'll be useful everywhere). Node arguments for
predicates require the '%' prefix for consistency. Hex numbers are permitted.
 2016-10-09 12:32:36 +02:00
David Given d75cc0a663 Basic register allocation works! 2016-10-08 23:32:54 +02:00
David Given 637aeed70a Only allocate an output vreg if the instruction actually wants one. 2016-10-08 12:15:21 +02:00
David Given 2198db69b1 Instruction predicates work now. 2016-10-08 11:35:33 +02:00
David Given 9ebf731335 Minor cleanup. 2016-10-08 11:07:28 +02:00
David Given 9db902314b Fix bug where pushes were being placed in the wrong blocks. 2016-10-08 10:21:24 +02:00
David Given 4e49830e09 Overhaul of everything phi related; critical edge splitting now happens before 
anything SSA happens; liveness calculations now look like they might be
working.
 2016-10-08 00:21:23 +02:00
David Given ee93389c5f Refactor the cfg and dominance stuff to make it a lot nicer. 2016-10-06 21:34:21 +02:00
David Given d20b63dc94 The register allocator is really a pass, so arrange the code like one. 2016-10-05 23:55:38 +02:00
David Given 87e004e4a9 Warning fix. 2016-10-05 23:55:04 +02:00
David Given 21034c0d65 No, dammit, for register allocation I need to walk the blocks in *dominance* 
order. Since the dominance tree has changed when I fiddled with the graph, I
need to recompute it, so factor it out of the SSA pass. Code is uglier than I'd
like but at least the RET statement goes last in the generated code now.
 2016-10-05 23:52:54 +02:00