e9e2c6d314
Add note about future optimization noted in the ppc compiler writer's guide
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llvm-svn: 23245
2005-09-06 15:30:48 +00:00
2dded8302a
Add accessor for 64bit flag, so that we can tell when it is safe to
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generate the fun in-register fp<->long instructions.
llvm-svn: 23244
2005-09-06 15:30:12 +00:00
d23739d020
Next round of DAGCombiner changes. This version now passes all the tests
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I have run so far when run before Legalize. It still needs to pick up the
SetCC folds, and nodes that use SetCC.
llvm-svn: 23243
2005-09-06 04:43:02 +00:00
f1705fdda4
Add a requirement, patch contributed by Henrik Bach.
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llvm-svn: 23242
2005-09-06 04:07:15 +00:00
c8bd5bda59
revert part of the last change, should fix regressions
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llvm-svn: 23241
2005-09-04 06:12:19 +00:00
aa833d4571
explicitly specify an operands list for patterns with inputs (e.g. neg)
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llvm-svn: 23240
2005-09-03 01:28:40 +00:00
8ae9525bd0
include the dag isel fragment
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llvm-svn: 23239
2005-09-03 01:17:22 +00:00
0442dcfabc
ask for a dag isel
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llvm-svn: 23238
2005-09-03 01:15:41 +00:00
33f98bdddf
allow for a target to ask for a dag isel
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llvm-svn: 23237
2005-09-03 01:15:25 +00:00
90d000417f
Add an option and stuff implementation of a dag isel emitter
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llvm-svn: 23236
2005-09-03 01:14:03 +00:00
821628ff2a
Fix a checking failure in gs
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llvm-svn: 23235
2005-09-03 01:04:40 +00:00
5f12cf14be
Change the isel to not break out of the big giant switch. Instead, the
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switch should never be exited, so its bottom is now unreachable.
llvm-svn: 23234
2005-09-03 00:53:47 +00:00
9220f92c41
rearrange logical ops to group them together more consistently.
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Define the PatFrag class which can be used to define subpatterns to match
things with. Define 'not', and use it to define the patterns for andc,
nand, etc.
llvm-svn: 23233
2005-09-03 00:21:51 +00:00
dcbb561b76
Add AND/OR/XOR
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llvm-svn: 23232
2005-09-02 22:35:53 +00:00
7cea6ef16e
Next round of DAG Combiner changes. Just need to support multiple return
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values, and then we should be able to hook it up.
llvm-svn: 23231
2005-09-02 21:18:40 +00:00
3a1002d529
Add some initial patterns to simple binary instructions, though they
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currently don't do anything. This elides patterns for binary operators
that ping on the carry flag, since we don't model it yet.
This patch also removes PPC::SUB, because it is dead.
llvm-svn: 23230
2005-09-02 21:18:00 +00:00
1a570f1fe4
Clean up some code from the last checkin
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llvm-svn: 23229
2005-09-02 20:32:45 +00:00
630226697f
Fix a bug in legalize where it would emit two calls to libcalls that return
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i64 values on targets that need that expanded to 32-bit registers. This fixes
PowerPC/2005-09-02-LegalizeDuplicatesCalls.ll and speeds up 189.lucas from
taking 122.72s to 81.96s on my desktop.
llvm-svn: 23228
2005-09-02 20:26:58 +00:00
63fab495bb
Test that converting from double to int64 results in one libcall, not one
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and a dead one. This is a legalize bug
llvm-svn: 23227
2005-09-02 20:24:10 +00:00
06e237f253
turn on dag isel by default
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llvm-svn: 23226
2005-09-02 19:53:54 +00:00
b95b280bee
Make sure to auto-cse nullary ops
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llvm-svn: 23224
2005-09-02 19:36:17 +00:00
5ba7b615ed
add a map for nullary ops
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llvm-svn: 23223
2005-09-02 19:35:42 +00:00
27d628dfc9
Add help support for -mcpu and -mattr.
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llvm-svn: 23222
2005-09-02 19:27:43 +00:00
1e89e36dcd
Fix some buggy logic where we would try to remove nodes with two operands
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from the binary ops map, even if they had multiple results. This latent bug
caused a few failures with the dag isel last night.
To prevent stuff like this from happening in the future, add some really
strict checking to make sure that the CSE maps always match up with reality!
llvm-svn: 23221
2005-09-02 19:15:44 +00:00
9690a4f321
Pull out Lowering in preperation for multiple ISels. Oh, and get rid of some stuff
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llvm-svn: 23220
2005-09-02 18:46:02 +00:00
b0b4ec5655
Don't create zero sized stack objects even for array allocas with a zero
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number of elements.
llvm-svn: 23219
2005-09-02 18:41:28 +00:00
aa3b1fcc58
Decouple fsqrt from gpul optimizations, implementing fsqrt.ll.
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Remove the -enable-gpopt option which is subsumed by feature flags.
llvm-svn: 23218
2005-09-02 18:33:05 +00:00
ffb99034cf
new testcase to ensure fsqrt is generated for correct subtargets only, and
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that the fsqrt feature works.
llvm-svn: 23217
2005-09-02 18:32:22 +00:00
38ad3f6948
Move a bunch of non-deprecated methods above the "deprecated line"
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llvm-svn: 23216
2005-09-02 18:16:20 +00:00
b6cde17d29
Fix the release build, noticed by Eric van Riet Paap
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llvm-svn: 23215
2005-09-02 07:09:28 +00:00
b5e381a8cf
Fix a problem that Dan Berlin noticed, where reassociation would not succeed
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in building maximal expressions before simplifying them. In particular, i
cases like this:
X-(A+B+X)
the code would consider A+B+X to be a maximal expression (not understanding
that the single use '-' would be turned into a + later), simplify it (a noop)
then later get simplified again.
Each of these simplify steps is where the cost of reassociation comes from,
so this patch should speed up the already fast pass a bit.
Thanks to Dan for noticing this!
llvm-svn: 23214
2005-09-02 07:07:58 +00:00
9fe263aa75
Avoid creating garbage instructions, just move the old add instruction
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to where we need it when converting -(A+B+C) -> -A + -B + -C.
llvm-svn: 23213
2005-09-02 06:38:04 +00:00
b944d5a491
new testcase for recent bugfix
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llvm-svn: 23212
2005-09-02 06:12:12 +00:00
d1325da091
add some assertions and fix problems where reassociate could access the
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Ops vector out of range
llvm-svn: 23211
2005-09-02 05:23:22 +00:00
a6dde9962d
Fix VC++ build errors
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llvm-svn: 23210
2005-09-02 02:51:42 +00:00
763a3a0fa7
Restore this patch now that the latent bug has been fixed
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llvm-svn: 23209
2005-09-02 01:24:55 +00:00
d9af1aab51
Make sure to legalize assert[zs]ext's operand correctly
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llvm-svn: 23208
2005-09-02 01:15:01 +00:00
06d440f2ee
Revert the previous patch which causes a mysterious regression in toast.
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llvm-svn: 23207
2005-09-02 00:47:05 +00:00
7138f91424
Teach live intervals to not crash on dead livein regs
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llvm-svn: 23206
2005-09-02 00:20:32 +00:00
a66403dbf7
For values that are live across basic blocks and need promotion, use ANY_EXTEND
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instead of ZERO_EXTEND to eliminate extraneous extensions. This eliminates
dead zero extensions on formal arguments and other cases on PPC, implementing
the newly tightened up test/Regression/CodeGen/PowerPC/small-arguments.ll test.
llvm-svn: 23205
2005-09-02 00:19:37 +00:00
7753f175e6
legalize ANY_EXTEND appropriately
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llvm-svn: 23204
2005-09-02 00:18:10 +00:00
8c393c218b
Add support for ANY_EXTEND and add a few minor folds for it
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llvm-svn: 23203
2005-09-02 00:17:32 +00:00
210975cfbb
Handle any_extend like zext
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llvm-svn: 23202
2005-09-02 00:16:09 +00:00
2493f0e5fd
Handle ANY_EXTEND like ZERO_EXTEND. Simplify the extend/truncate code on
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the observation that it only has to handle i1 -> i64 and i64 -> i1.
llvm-svn: 23201
2005-09-02 00:15:30 +00:00
969af57d65
Add a new ANY_EXTEND node, which operates like an extension but has undefined
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top bits.
llvm-svn: 23200
2005-09-02 00:14:40 +00:00
97ac77fd91
This should permit NOT and's, not even dead ones.
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llvm-svn: 23199
2005-09-02 00:13:56 +00:00
9ee867b93b
Implement small-arguments.ll:test3 by teaching the DAG optimizer that
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the results of calls to functions returning small values are properly
sign/zero extended.
llvm-svn: 23198
2005-09-01 23:44:32 +00:00
907123b1ab
Another case that shouldn't have sign extends: functions returning short
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are known to return properly sign extended values, no need for an explicit
extension.
llvm-svn: 23197
2005-09-01 23:43:58 +00:00
d78d975437
Fix some code in the current node combining code, spotted when it was moved
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over to DAGCombiner.cpp
1. Don't assume that SetCC returns i1 when folding (xor (setcc) constant)
2. Don't duplicate code in folding AND with AssertZext that is handled by
MaskedValueIsZero
llvm-svn: 23196
2005-09-01 23:25:49 +00:00
2504fe2613
Implement first round of feedback from chris (there's still a couple things
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left to do).
llvm-svn: 23195
2005-09-01 23:24:04 +00:00
Nate Begeman