Nate Begeman
f495ec2497
Legalize BUILD_PAIR appropriately for upcoming 64 bit PowerPC work.
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llvm-svn: 23776
2005-10-18 00:27:41 +00:00
Nate Begeman
b2f472ec56
fold fmul X, +2.0 -> fadd X, X;
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llvm-svn: 23774
2005-10-17 20:40:11 +00:00
Chris Lattner
27d166c9bf
add a trivial fold
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llvm-svn: 23764
2005-10-17 01:07:11 +00:00
Chris Lattner
d22af0377d
Fix this logic.
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llvm-svn: 23756
2005-10-15 22:35:40 +00:00
Chris Lattner
f2d781b780
Add a case we were missing that was causing us to fail CodeGen/PowerPC/rlwinm.ll:test3
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llvm-svn: 23755
2005-10-15 22:18:08 +00:00
Chris Lattner
346dc6fed1
Use getExtLoad here instead of getNode, as extloads produce two values. This
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fixes a legalize failure on SPASS for itanium.
llvm-svn: 23747
2005-10-15 20:24:07 +00:00
Nate Begeman
9c6b86dcb4
fold sext_in_reg, sext_in_reg where both have the same VT. This was
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popping up in Fourinarow.
llvm-svn: 23722
2005-10-14 01:29:07 +00:00
Nate Begeman
c206a2a32a
Relax the checking on zextload generation a bit, since as sabre pointed out
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you could be AND'ing with the result of a shift that shifts out all the
bits you care about, in addition to a constant.
Also, move over an add/sub_parts fold from legalize to the dag combiner,
where it works for things other than constants. Woot!
llvm-svn: 23720
2005-10-14 01:12:21 +00:00
Chris Lattner
b2db3f50f2
Fix the trunc(load) case, finally allowing crafty and povray to pass
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llvm-svn: 23718
2005-10-13 22:10:05 +00:00
Chris Lattner
2563394c27
Fix some bugs in (sext (load x))
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llvm-svn: 23717
2005-10-13 21:52:31 +00:00
Chris Lattner
3fd6d9358e
When ExpandOp'ing a [SZ]EXTLOAD, make sure to remember that the chain
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is also legal. Add support for ExpandOp'ing raw EXTLOADs too.
llvm-svn: 23716
2005-10-13 21:44:47 +00:00
Chris Lattner
dc6e47231b
Implement PromoteOp for *EXTLOAD, allowing MallocBench/gs to Legalize
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llvm-svn: 23715
2005-10-13 20:07:41 +00:00
Nate Begeman
d155f7f1c2
Fix the remaining DAGCombiner issues pointed out by sabre. This should fix
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the remainder of the failures introduced by my patch last night.
llvm-svn: 23714
2005-10-13 18:34:58 +00:00
Chris Lattner
75447d2f8e
Fix a minor bug in the dag combiner that broke pcompress2 and some other
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tests.
llvm-svn: 23713
2005-10-13 18:16:34 +00:00
Nate Begeman
9a08d6fb43
Add support to Legalize for expanding i64 sextload/zextload into hi and lo
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parts. This should fix the crafty and signed long long unit test failure
on x86 last night.
llvm-svn: 23711
2005-10-13 17:15:37 +00:00
Jim Laskey
2d23e75ac5
Inhibit instructions from being pushed before function calls. This will
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minimize unnecessary spilling.
llvm-svn: 23710
2005-10-13 16:44:00 +00:00
Nate Begeman
c7e7c94db5
Move some Legalize functionality over to the DAGCombiner where it belongs.
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Kill some dead code.
llvm-svn: 23706
2005-10-13 03:11:28 +00:00
Nate Begeman
b1d64c386b
Fix a potential bug with two combine-to's back to back that chris pointed
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out, where after the first CombineTo() call, the node the second CombineTo
wishes to replace may no longer exist.
Fix a very real bug with the truncated load optimization on little endian
targets, which do not need a byte offset added to the load.
llvm-svn: 23704
2005-10-12 23:18:53 +00:00
Nate Begeman
d97bb9d084
More cool stuff for the dag combiner. We can now finally handle things
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like turning:
_foo:
fctiwz f0, f1
stfd f0, -8(r1)
lwz r2, -4(r1)
rlwinm r3, r2, 0, 16, 31
blr
into
_foo:
fctiwz f0,f1
stfd f0,-8(r1)
lhz r3,-2(r1)
blr
Also removed an unncessary constraint from sra -> srl conversion, which
should take care of hte only reason we would ever need to handle sra in
MaskedValueIsZero, AFAIK.
llvm-svn: 23703
2005-10-12 20:40:40 +00:00
Jim Laskey
2fe279f783
Finally committing to the new scheduler. Still -sched=none by default.
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llvm-svn: 23702
2005-10-12 18:29:35 +00:00
Chris Lattner
21c3cf756f
Fix a powerpc crash on CodeGen/Generic/llvm-ct-intrinsics.ll
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llvm-svn: 23694
2005-10-11 17:56:34 +00:00
Chris Lattner
e6fcb88ad1
Add a canonicalization that got lost, fixing PowerPC/fold-li.ll:SUB
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llvm-svn: 23693
2005-10-11 06:07:15 +00:00
Chris Lattner
1441e42e56
clean up some corner cases
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llvm-svn: 23692
2005-10-10 23:00:08 +00:00
Chris Lattner
5308a566ba
Implement trivial DSE. If two stores are neighbors and store to the same
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location, replace them with a new store of the last value. This occurs
in the same neighborhood in 197.parser, speeding it up about 1.5%
llvm-svn: 23691
2005-10-10 22:31:19 +00:00
Chris Lattner
1c60abe065
Add support for CombineTo, allowing the dag combiner to replace nodes with
...
multiple results.
Use this support to implement trivial store->load forwarding, implementing
CodeGen/PowerPC/store-load-fwd.ll. Though this is the most simple case and
can be extended in the future, it is still useful. For example, it speeds
up 197.parser by 6.2% by avoiding an LSU reject in xalloc:
stw r6, lo16(l5_end_of_array)(r2)
addi r2, r5, -4
stwx r5, r4, r2
- lwzx r5, r4, r2
- rlwinm r5, r5, 0, 0, 30
stwx r5, r4, r2
lwz r2, -4(r4)
ori r2, r2, 1
llvm-svn: 23690
2005-10-10 22:04:48 +00:00
Nate Begeman
703c8f57d6
Teach the DAGCombiner several new tricks, teaching it how to turn
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sext_inreg into zext_inreg based on the signbit (fires a lot), srem into
urem, etc.
llvm-svn: 23688
2005-10-10 21:26:48 +00:00
Chris Lattner
caed5bc79b
Fix comment
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llvm-svn: 23686
2005-10-10 16:52:03 +00:00
Chris Lattner
58f0f21ed1
Add ISD::ADD to MaskedValueIsZero
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llvm-svn: 23685
2005-10-10 16:51:40 +00:00
Chris Lattner
5b6e18d6fd
This function is now dead
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llvm-svn: 23684
2005-10-10 16:49:22 +00:00
Chris Lattner
29613bce04
Enable Nate's excellent DAG combiner work by default. This allows the
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removal of a bunch of ad-hoc and crufty code from SelectionDAG.cpp.
llvm-svn: 23682
2005-10-10 16:47:10 +00:00
Chris Lattner
097b306215
add a todo for something I noticed
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llvm-svn: 23679
2005-10-09 22:59:08 +00:00
Chris Lattner
d0eecf4e64
(X & Y) & C == 0 if either X&C or Y&C are zero
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llvm-svn: 23678
2005-10-09 22:12:36 +00:00
Chris Lattner
d5ac294abd
When emiting a CopyFromReg and the source is already a vreg, do not bother
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creating a new vreg and inserting a copy: just use the input vreg directly.
This speeds up the compile (e.g. about 5% on mesa with a debug build of llc)
by not adding a bunch of copies and vregs to be coallesced away. On mesa,
for example, this reduces the number of intervals from 168601 to 129040
going into the coallescer.
llvm-svn: 23671
2005-10-09 05:58:56 +00:00
Nate Begeman
8feae2fcc9
Lo and behold, the last bits of SelectionDAG.cpp have been moved over.
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llvm-svn: 23665
2005-10-08 00:29:44 +00:00
Chris Lattner
f8b0332dfc
remove debugging code
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llvm-svn: 23663
2005-10-07 15:31:26 +00:00
Chris Lattner
dff6183cd7
implement CodeGen/PowerPC/div-2.ll:test2-4 by propagating zero bits through
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C-X's
llvm-svn: 23662
2005-10-07 15:30:32 +00:00
Chris Lattner
5e0581c32b
fix indentation
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llvm-svn: 23660
2005-10-07 06:37:02 +00:00
Chris Lattner
36b58a015b
Turn sdivs into udivs when we can prove the sign bits are clear. This
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implements CodeGen/PowerPC/div-2.ll
llvm-svn: 23659
2005-10-07 06:10:46 +00:00
Chris Lattner
7709ee0085
silence a bogus GCC warning
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llvm-svn: 23646
2005-10-06 17:39:10 +00:00
Chris Lattner
0f04d333d5
Make the legalizer completely non-recursive
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llvm-svn: 23642
2005-10-06 01:20:27 +00:00
Nate Begeman
85d4334da0
Let the combiner handle more cases
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llvm-svn: 23641
2005-10-05 21:44:43 +00:00
Nate Begeman
cf23a9a328
Remove some bad code from Legalize
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llvm-svn: 23640
2005-10-05 21:44:10 +00:00
Nate Begeman
a34475adfc
Check in some more DAGCombiner pieces
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llvm-svn: 23639
2005-10-05 21:43:42 +00:00
Chris Lattner
7f1bde4996
implement visitBR_CC so that PowerPC/inverted-bool-compares.ll passes
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with the dag combiner. This speeds up espresso by 8%, reaching performance
parity with the dag-combiner-disabled llc.
llvm-svn: 23636
2005-10-05 06:47:48 +00:00
Chris Lattner
27adcf1b0f
fix some pastos
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llvm-svn: 23635
2005-10-05 06:37:22 +00:00
Chris Lattner
697fdaba58
Add a new HandleNode class, which is used to handle (haha) cases in the
...
dead node elim and dag combiner passes where the root is potentially updated.
This fixes a fixme in the dag combiner.
llvm-svn: 23634
2005-10-05 06:35:28 +00:00
Chris Lattner
75ce53eefd
Implement the code for PowerPC/inverted-bool-compares.ll, even though it
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that testcase still does not pass with the dag combiner. This is because
not all forms of br* are folded yet.
Also, when we combine a node into another one, delete the node immediately
instead of waiting for the node to potentially come up in the future.
llvm-svn: 23632
2005-10-05 06:11:08 +00:00
Chris Lattner
cf12d7b556
make sure that -view-isel-dags is the input to the isel, not the input to
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the second phase of dag combining
llvm-svn: 23631
2005-10-05 06:09:10 +00:00
Chris Lattner
86ccb0efb4
Fix a crash compiling Olden/tsp
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llvm-svn: 23630
2005-10-05 04:45:43 +00:00
Jim Laskey
9a2a3d4aab
Reverting to version - until problem isolated.
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llvm-svn: 23622
2005-10-04 16:41:51 +00:00