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dbdbb30a7c
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2293 Commits

Author SHA1 Message Date
Chris Lattner
dbdbb30a7c implement a simple proof-of-concept optimization for 
the new isel: fold movechild+record+moveparent into a
single recordchild N node.  This shrinks the X86 table
from 125443 to 117502 bytes.

llvm-svn: 97031
 2010-02-24 07:31:45 +00:00
Chris Lattner
c308ed9bd8 The new isel passes all tests, time to start making it go fast. 
Also add an easy macro at the top of DAGISelEmitter.cpp to enable
it.  Lets see if I can avoid accidentally turning it on :)

llvm-svn: 97029
 2010-02-24 07:06:50 +00:00
Chris Lattner
7878da5c39 The new isel was not properly handling patterns that covered 
internal nodes with flag results.  Record these with a new 
OPC_MarkFlagResults opcode and use this to update the interior
nodes' flag results properly.  This fixes CodeGen/X86/i256-add.ll
with the new isel.

llvm-svn: 97021
 2010-02-24 05:33:42 +00:00
Sean Callanan
a5bd688c68 Changed the table generator so that the X86 
disassembler never recognizes InitReg instructions.

llvm-svn: 97017
 2010-02-24 02:56:25 +00:00
Mikhail Glushenkov
653efea01f Trailing whitespace. 
llvm-svn: 96923
 2010-02-23 09:05:01 +00:00
Mikhail Glushenkov
c47f951a86 Implement order-preserving option forwarding. 
Needed to correctly handle things like 'llvmc -framework Foo foo.o -framework
Bar bar.o' - before this commit all '-framework' options would've been grouped
together in the beginning.

Due to our dependence on CommandLine this turned out to be a giant hack; we will
migrate away from CommandLine eventually.

llvm-svn: 96922
 2010-02-23 09:04:57 +00:00
Mikhail Glushenkov
232ae779ee Correct option forwarding: initial implementation. 
Does not work, but the infrastructure changes are in place.

llvm-svn: 96920
 2010-02-23 09:04:44 +00:00
Mikhail Glushenkov
d030cced3d New experimental/undocumented feature: 'works_on_empty'. 
For now, just enough support to make -filelist work.

llvm-svn: 96918
 2010-02-23 09:04:28 +00:00
Mikhail Glushenkov
947daddd81 Add a way to enable '-opt=foo' forwarding. 
llvm-svn: 96916
 2010-02-23 09:04:13 +00:00
Daniel Dunbar
93911572ff Eliminate llvmgcc_version testing variable. 
llvm-svn: 96908
 2010-02-23 07:56:28 +00:00
Daniel Dunbar
cb977c7241 Kill unused llvmgccmajvers testing variable. 
llvm-svn: 96906
 2010-02-23 07:56:18 +00:00
Chris Lattner
5b5d31f533 add some #if 0'd out code for checking that named values in 
input/output patterns have the same type.  It turns out that 
this triggers all the time because we don't infer types 
between these boundaries.  Until we do, don't turn this on.

llvm-svn: 96905
 2010-02-23 07:50:58 +00:00
Chris Lattner
8b5a000583 Reject patterns that use a name multiple times in the src or result 
of a pattern and where the uses have different types.

llvm-svn: 96904
 2010-02-23 07:22:28 +00:00
Chris Lattner
da756c0018 reject patterns that have dead named arguments in the input pattern 
this is tidier and can find bugs.

llvm-svn: 96900
 2010-02-23 06:55:24 +00:00
Chris Lattner
df30185383 reject patterns that mention a name in the destination pattern 
but not in the input.  Previously, this would trigger an abort
late in the isel logic.

llvm-svn: 96898
 2010-02-23 06:35:45 +00:00
Chris Lattner
1a749c367d merge some code. 
llvm-svn: 96896
 2010-02-23 06:16:51 +00:00
Chris Lattner
4c22c51356 more tidying up 
llvm-svn: 96891
 2010-02-23 05:59:10 +00:00
Chris Lattner
55115233db reduce indentation by eliminating 'else after return' 
llvm-svn: 96889
 2010-02-23 05:51:07 +00:00
Chris Lattner
49b1b721fc really fix an off-by-one error 
llvm-svn: 96845
 2010-02-23 01:07:39 +00:00
Chris Lattner
68fd68d9ff switch the value# in OPC_CompleteMatch and OPC_EmitNode to use a 
VBR encoding for the insanity being perpetrated by the spu backend. 

llvm-svn: 96843
 2010-02-23 00:59:59 +00:00
Chris Lattner
49ec9f853e add a new Push2 opcode for targets (like cellspu) which have 
ridiculously ginormous patterns and need more than one byte
of displacement for encodings.  This fixes CellSPU/fdiv.ll.
SPU is still doing something else ridiculous though.

llvm-svn: 96833
 2010-02-22 23:55:39 +00:00
Chris Lattner
fbca302fe2 Change ComplexPattern handling to push the node being matched as 
well as the operands produced when the pattern is matched.  This
allows CheckSame to work correctly when matching replicated 
names involving ComplexPatterns.  This fixes a bunch of MSP430 
failures, we're down to 13 failures, two of which are
due to a sched bug.

llvm-svn: 96824
 2010-02-22 23:33:44 +00:00
Chris Lattner
1613c59dbe add a new CheckMultiOpcode opcode for checking that a node 
has one of the list of acceptable opcodes for a complex 
pattern.  This fixes 4 regtest failures.

llvm-svn: 96814
 2010-02-22 22:30:37 +00:00
Chris Lattner
b77c4c6a30 When matching patterns that have a complex pattern as their root, make 
sure to only run the complex pattern on nodes where the target opts in.
This patch only handles targets with one opcode specified so far, but
fixes 16 failures, only 34 left.

llvm-svn: 96813
 2010-02-22 22:18:05 +00:00
Chris Lattner
85fa3173ff fix most of the failures in the x86 suite by handling multiple 
result nodes correctly.  Note that this includes a horrible hack
in DAGISelHeader which cannot be fixed reasonably without 
eliminating (parallel) from input patterns.  That, in turn,
can't be done until we support writing multiple result patterns
for the X86and_flag and related multiple-result nodes.

llvm-svn: 96767
 2010-02-21 23:54:05 +00:00
Chris Lattner
691dcb90a4 Always emit register class id references as i32 like 
DAGISelEmitter does.  This fixes 11 arm failures (8 
left).

llvm-svn: 96757
 2010-02-21 20:53:45 +00:00
Chris Lattner
fc00a4e6b8 Sort the patterns before adding them to the FA so that we get the 
least cost matches.  This gets us from 195 -> 208 passes on the ppc codegen tests.

llvm-svn: 96747
 2010-02-21 19:22:06 +00:00
Chris Lattner
4a9c3615f8 emit table indexes before each row so that it is debuggable. 
llvm-svn: 96730
 2010-02-21 07:16:41 +00:00
Chris Lattner
594803ba50 fix a table size miscomputation, target opcodes are 2 bytes. 
With this, the matcher actually works reasonably well, but
crashes on larger examples in the scheduler.

llvm-svn: 96727
 2010-02-21 06:44:29 +00:00
Chris Lattner
98d6a38236 emit to the right streams, to avoid emitting the push 
body before the push.

llvm-svn: 96726
 2010-02-21 06:30:04 +00:00
Chris Lattner
359c75b60c oops don't turn this on for everyone yet. 
llvm-svn: 96725
 2010-02-21 06:03:56 +00:00
Chris Lattner
0164635dad implement the last known missing feature: updating uses of results 
of the matched pattern to use the newly created node results.  Onto
the "making it actually work" phase!

llvm-svn: 96724
 2010-02-21 06:03:07 +00:00
Chris Lattner
8983077c87 Lots of improvements to the new dagisel emitter. This gets it to 
the point where it is to the 95% feature complete mark, it just
needs result updating to be done (then testing, optimization 
etc).

More specificallly, this adds support for chain and flag handling
on the result nodes, support for sdnodexforms, support for variadic
nodes, memrefs, pinned physreg inputs, and probably lots of other
stuff.

In the old DAGISelEmitter, this deletes the dead code related to
OperatorMap, cleans up a variety of dead stuff handling "implicit
remapping" from things like globaladdr -> targetglobaladdr (which
is no longer used because globaladdr always needs to be legalized),
and some minor formatting fixes.

llvm-svn: 96716
 2010-02-21 03:22:59 +00:00
Chris Lattner
e6302b3565 add emitter support for integer constants and simple physreg references. 
llvm-svn: 96663
 2010-02-19 07:49:56 +00:00
Chris Lattner
80491f4c52 fix this to work more determinstically, patch by Thomas Veith! 
llvm-svn: 96661
 2010-02-19 07:02:20 +00:00
Chris Lattner
28cc2f3f44 I confused myself, temporaries will be recorded right along with other inputs. 
llvm-svn: 96639
 2010-02-19 00:33:13 +00:00
Chris Lattner
fc0b27563f introduce a new ResultVal and start keeping track of temporary values. 
llvm-svn: 96636
 2010-02-19 00:27:40 +00:00
Chris Lattner
4cfdecc52b add support for referencing registers and immediates, 
building the tree to represent them but not emitting 
table entries for them yet.

llvm-svn: 96617
 2010-02-18 22:03:03 +00:00
Chris Lattner
5bc53ac6f5 start sketching out the structure of code for result emission generation. 
Nothing real here yet.

llvm-svn: 96575
 2010-02-18 06:47:49 +00:00
Chris Lattner
76506b3749 rename the child field to 'next'. This is not a parent/child 
relationship, this is a linear list relationship.

llvm-svn: 96561
 2010-02-18 02:53:41 +00:00
Chris Lattner
955650be1f eliminate the MatcherNodeWithChild class, give the 'child' 
field to MatcherNode.

llvm-svn: 96560
 2010-02-18 02:49:24 +00:00
Chris Lattner
025ca7158a fit in 80 cols 
llvm-svn: 96541
 2010-02-18 00:23:27 +00:00
Chris Lattner
a1f12685c7 redisable this to save people a small amount of build time. 
llvm-svn: 96497
 2010-02-17 19:19:50 +00:00
Chris Lattner
2ec1f1a54a move isOnlyReachableByFallthrough out of MachineBasicBlock into AsmPrinter, 
and add a sparc implementation that knows about delay slots.  Patch by
Nathan Keynes!

llvm-svn: 96492
 2010-02-17 18:52:56 +00:00
Chris Lattner
b8c69426ef reduce nesting. 
llvm-svn: 96466
 2010-02-17 06:53:36 +00:00
Chris Lattner
143e2b6181 improve comments, the matcher is now feature complete, on to codegen. 
llvm-svn: 96464
 2010-02-17 06:47:35 +00:00
Chris Lattner
955ce23e27 sink special case "cannotyetselect" for intrinsics out of the 
tblgen splatted code into the implementation.

llvm-svn: 96460
 2010-02-17 06:28:22 +00:00
Chris Lattner
8f3afbc621 Emulate the current isel's "IsChainCompatible" logic for now. 
I'd like to eventually rip it out, but for now producing the
same selections as the old matcher is more important.

llvm-svn: 96458
 2010-02-17 06:23:39 +00:00
Chris Lattner
15eb8504cd properly record chain inputs to complex patterns, 
resolving a fixme.

llvm-svn: 96457
 2010-02-17 06:08:25 +00:00
Chris Lattner
abb5e906a7 simplify IsChainCompatible codegen, add comments. no 
functionality change.

llvm-svn: 96453
 2010-02-17 05:35:28 +00:00