Dan Gohman
cfeb6a4506
Move LSR's private isZero function to a public SCEV member
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function, and make use of it in several places.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52463 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 16:23:07 +00:00
Gabor Greif
a9c0f2b03f
fix validator warning
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52461 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 14:05:31 +00:00
Gabor Greif
dfed118f22
prettify, no semantic changes
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52460 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 13:44:57 +00:00
Matthijs Kooijman
ca85d65277
Rewrite the DeadArgumentElimination pass, to use a more explicit tracking of
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dependencies between return values and/or arguments. Also make the handling of
arguments and return values the same.
The pass now looks properly inside returned structs, but only at the first
level (ie, not inside nested structs).
Also add a testcase for testing various variations of (multiple) dead rerturn
values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52459 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 11:12:53 +00:00
Matthijs Kooijman
c2afe89019
Reapply r52397 (make IPConstProp promote returned arguments), but fixed this
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time. Sorry for the trouble!
This time, also add a testcase, which I should have done in the first place...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52455 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 08:30:37 +00:00
Evan Cheng
359e9371b9
XOR32rr, etc. are not AsCheapAsMove, but MOV32ri, etc. are.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52454 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 08:13:07 +00:00
Matthijs Kooijman
8b0fcf38ef
Reapply r52396, it was unrelated to the breakage (that was caused by r52397, my
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commit after this).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52453 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 08:09:27 +00:00
Evan Cheng
7543e58a77
Complete support for two-address pass rematerialization. Now *almost* always a win.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52452 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 07:49:14 +00:00
Evan Cheng
ce049437d6
Add MachineRegisterInfo::use_empty.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52451 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 07:47:55 +00:00
Evan Cheng
625986afea
Cosmetic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52450 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 07:47:28 +00:00
Bill Wendling
604a818463
If compiling for PPC on an i386 box, the LTO wouldn't get the altivec (and
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other) feature information. The workaround is inelegant and could be cleaned up
if this information were available some other way (say, in the IR).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52447 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 06:35:30 +00:00
Chris Lattner
0521e3cdc1
implement some simple bswap optimizations, rdar://5992453
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52442 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 04:33:20 +00:00
Chris Lattner
a2eec61607
temporarily revert this testcase since its patch was reverted.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52441 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 04:03:23 +00:00
Chris Lattner
8114b718c9
make truncate/sext elimination capable of changing phi's. This
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implements rdar://6013816 and the testcase in Transforms/InstCombine/sext-misc.ll.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52440 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 04:00:49 +00:00
Evan Cheng
fab8387384
Unbreak DECLARE isel in pic mode.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52439 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 02:48:27 +00:00
Devang Patel
64cd658223
Preserve dominance frontier while trivially unswitching loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52438 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 02:16:38 +00:00
Devang Patel
6d0cc55ef3
Check empty dominance frontier.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52437 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 02:12:09 +00:00
Dan Gohman
44f6a2c951
Auto-upgrade code for multiple-value return statements. This code
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isn't actually called yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52435 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 23:38:43 +00:00
Dan Gohman
80b9626ee3
In InsertValueInst's copy ctor, actually copy the operands.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52434 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 23:25:49 +00:00
Owen Anderson
2960ed4b85
We don't want to find dependencies within the same block in this case. It leads to incorrect results because
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we're detecting something at or after the call we're querying on.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52433 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 22:27:06 +00:00
Dan Gohman
b79bf1966d
Implement the ExtractValueInst::getIndexedType that accepts one
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index value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52432 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 21:07:55 +00:00
Evan Cheng
f26e8557de
Live-through live interval is [mbb start, mbb end+1].
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52431 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 20:13:36 +00:00
Evan Cheng
739583be56
When extending a liveinterval by commuting, don't throw away the live ranges that are not affected.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52430 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 20:11:16 +00:00
Ted Kremenek
8d6a58c5d5
Consistently set "Buckets[NumBuckets] = reinterpret_cast<void*>(-1)" throughout FoldingSet.cpp.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52425 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 19:12:43 +00:00
Owen Anderson
26bb50ab48
Add an insertBefore method for attaching previously unattached instructions,
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such as those created by clone(), to a basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52424 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 18:29:27 +00:00
Owen Anderson
2b7470eb54
Fix use of placement new to actually use an address.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52423 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 18:07:43 +00:00
Evan Cheng
95350b9cd2
It's not safe to remove SUBREG_TO_REG that looks like identity copies, e.g. movl %eax, %eax on x86-64 actually does a zero-extend.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52421 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 17:59:16 +00:00
Anton Korobeynikov
0b725f17e0
Add one more 'magic' define :)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52420 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 17:57:43 +00:00
Anton Korobeynikov
7a17ff7b3f
Unbreak non-PPC builds
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52419 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 17:38:31 +00:00
Anton Korobeynikov
210539ebc4
Provide generic hooks for icache invalidation. Add PPC implementation.
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Patch by Gary Benson!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52418 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 17:30:05 +00:00
Chris Lattner
fc329f4fa1
revert recent patch which is causing widespread breakage.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52415 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 17:06:43 +00:00
Evan Cheng
1b088f3310
Don't forget to initialize SymbolSearchingDisabled.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52414 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 16:49:02 +00:00
Duncan Sands
34b176a181
Fix typo that changed the logic to something wrong.
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Spotted by Nick Lewycky.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52411 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 15:55:30 +00:00
Duncan Sands
69b01e92a2
Split type expansion into ExpandInteger and ExpandFloat
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rather than bundling them together. Rename FloatToInt
to PromoteFloat (better, if not perfect). Reorganize
files by types rather than by operations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52408 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 14:27:01 +00:00
Matthijs Kooijman
de9256ad2e
Forgot to commit the ValueTracking header file along with r52396.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52401 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 13:54:33 +00:00
Matthijs Kooijman
2fbabf6e6d
Learn IPConstProp to propagate arguments that are directly returned. Strictly
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speaking these are not constant values. However, when a function always returns
one of its arguments, then from the point of view of each caller the return
value is constant (or at least a known value) and can be replaced.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52397 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 12:20:24 +00:00
Matthijs Kooijman
906e423724
Learn IPConstProp to look at individual return values and propagate them
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individually.
Also learn IPConstProp how returning first class aggregates work, in addition
to old style multiple return instructions.
Modify the return-constants testscase to confirm this behaviour.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52396 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 12:02:52 +00:00
Matthijs Kooijman
74fc4d9686
80 column fixes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52391 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 08:26:32 +00:00
Matthijs Kooijman
3faf9df08f
Use a SmallVector instead of an array, since auto_ptr doesn't handle arrays
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properly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52390 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 08:24:37 +00:00
Chris Lattner
ead0d88ad7
add a new -enable-value-prop flag for llcbeta, that enables propagation
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of value info (sign/zero ext info) from one MBB to another. This doesn't
handle much right now because of two limitations:
1) only handles zext/sext, not random bit propagation (no assert exists
for this)
2) doesn't handle phis.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52383 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 06:09:18 +00:00
Duncan Sands
a47c6c3703
Fix spelling.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52381 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 03:24:13 +00:00
Evan Cheng
851bc04533
Rather than avoiding to wrap ISD::DECLARE GV operand in X86ISD::Wrapper, simply handle it at dagisel time with x86 specific isel code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52377 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 02:01:22 +00:00
Chris Lattner
fc196f9ee9
Add a missing ~ (dtor became ctor) which caused crashes on a bunch of stuff.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52374 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 23:06:51 +00:00
Evan Cheng
c3de802ad9
Do not issue identity copies.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52373 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 22:52:53 +00:00
Dan Gohman
9b93dd1f1a
Refine the change in r52258 for avoiding use-before-def conditions
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when changing the stride of a comparison so that it's slightly
more precise, by having it scan the instruction list to determine
if there is a use of the condition after the point where the
condition will be inserted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52371 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 22:34:15 +00:00
Chris Lattner
d34ff14358
switch TypeHasCycleThroughItself from using an std::set to using a SmallPtrSet,
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this speeds up the linking testcase in PR1860 by 44% (.379 -> 0.263)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52365 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 21:20:58 +00:00
Chris Lattner
a4477f9b31
stop making PATypeHolder's so crazily.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52364 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 21:17:12 +00:00
Evan Cheng
4e444436f2
Horizontal-add instructions are not commutative.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52363 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 21:16:24 +00:00
Evan Cheng
72b7b098c7
Switch over to SetVector to ensure same order of iterations do not vary across runs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52361 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 21:08:17 +00:00
Gabor Greif
e98fc279e2
Move some documentation from the header file into ProgrammersManual. About to improve.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52360 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 21:06:12 +00:00