Devang Patel
e3bfb88898
Fix PR1657
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42075 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-18 01:54:42 +00:00
Devang Patel
8893ca6dab
Do not eliminate loop when it is invalid to do so. For example,
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for(int i = 0; i < N; i++) {
if ( i == XYZ) {
A;
else
B;
}
C;
D;
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42058 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-17 21:01:05 +00:00
Devang Patel
5279d064bc
Skeleton for transformations to truncate loop's iteration space.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42054 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-17 20:39:48 +00:00
Devang Patel
161660e6d2
Fix comment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42048 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-17 20:07:40 +00:00
Chris Lattner
76c1b97e40
Merge DenseMapKeyInfo & DenseMapValueInfo into DenseMapInfo
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Add a new DenseMapInfo::isEqual method to allow clients to redefine
the equality predicate used when probing the hash table.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42042 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-17 18:34:04 +00:00
Dan Gohman
5d066ff7f0
Instcombine x-((x/y)*y) into a remainder operator.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42035 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-17 17:31:57 +00:00
Duncan Sands
cdb6d929d0
Factor the trampoline transformation into a subroutine.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42021 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-17 10:26:40 +00:00
Owen Anderson
2486686689
Be more careful when constant-folding PHI nodes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41998 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-16 08:04:16 +00:00
Owen Anderson
86f91e1757
Remove RLE. It is subsumed by GVN.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41968 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-14 22:33:52 +00:00
Dale Johannesen
9e3d3abd93
Remove the assumption that FP's are either float or
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double from some of the many places in the optimizers
it appears, and do something reasonable with x86
long double.
Make APInt::dump() public, remove newline, use it to
dump ConstantSDNode's.
Allow APFloats in FoldingSet.
Expand X86 backend handling of long doubles (conversions
to/from int, mostly).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41967 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-14 22:26:36 +00:00
Chris Lattner
5e6e494a97
Fix a logic error in ValueIsOnlyUsedLocallyOrStoredToOneGlobal that caused
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miscompilation of 188.ammp. Reject select and bitcast in
ValueIsOnlyUsedLocallyOrStoredToOneGlobal because RewriteHeapSROALoadUser can't handle it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41950 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-14 03:41:21 +00:00
Chris Lattner
ce4e748565
silence a bogus gcc warning.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41949 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-14 03:07:24 +00:00
Bill Wendling
c68491069a
Temporary reverting r41817
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(http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070910/053370.html ). It's
causing SPASS to fail.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41938 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-14 01:13:55 +00:00
Chris Lattner
309f20fc45
Teach GlobalLoadUsesSimpleEnoughForHeapSRA and the SROA rewriter how to handle
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a limited form of PHI nodes. This finally fixes PR1639, speeding 179.art up
from 7.84s to 3.13s on PPC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41933 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-13 21:31:36 +00:00
Chris Lattner
a637a8b1e7
be tolerant of PHI nodes when rewriting heap SROA code. This is a step
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along the way of PR1639
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41930 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-13 18:00:31 +00:00
Chris Lattner
330245e90b
refactor some code, no functionality change. On the path to PR1639
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41929 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-13 17:29:05 +00:00
Chris Lattner
c451f9c167
Make ValueIsOnlyUsedLocallyOrStoredToOneGlobal smart enough to see through
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bitcasts and phis. This is a step to fixing PR1639.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41928 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-13 16:37:20 +00:00
Chris Lattner
816861803f
Make AllUsesOfLoadedValueWillTrapIfNull strong enough to see through PHI
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nodes. This is the first step of the fix for PR1639.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41927 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-13 16:30:19 +00:00
Chris Lattner
36597a5ddb
Change llvm.gcroot to not init the root to null at runtime, this prevents
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using it for live-in values etc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41879 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-12 17:53:10 +00:00
Duncan Sands
b84abcd77d
Turn calls to trampolines into calls to the underlying
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nested function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41844 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-11 14:35:41 +00:00
Devang Patel
c3957d1983
Avoid negative logic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41829 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-11 01:10:45 +00:00
Devang Patel
d35ed2c16d
Refactor code into a separate method.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41826 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-11 00:42:56 +00:00
Devang Patel
964be45e7c
Clear split info object.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41823 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-11 00:23:56 +00:00
Devang Patel
4f12c5f615
Split condition does not have to be ICmpInst in all cases.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41822 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-11 00:12:56 +00:00
Devang Patel
ba32a5f3cc
Check all terminators inside loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41821 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 23:57:58 +00:00
Chris Lattner
50d9d77643
remove some dead code, this is handled by constant folding.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41819 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 23:46:29 +00:00
Devang Patel
0c0f7c935b
Swap exit condition operands if it works.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41817 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 23:34:06 +00:00
Chris Lattner
8d9455d4e4
Prevent tailcallelim from breaking "recursive" calls to builtins.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41804 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 20:58:55 +00:00
Devang Patel
9c7a9f186c
Filter exit conditions which are not yet handled.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41800 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 18:33:42 +00:00
Devang Patel
bc533cd128
Require SCEV before LCSSA.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41798 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10 18:08:23 +00:00
Chris Lattner
a54c7eb157
Don't zap back to back volatile load/stores
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41759 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-07 05:33:03 +00:00
Dale Johannesen
43421b3dd7
Next round of APFloat changes.
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Use APFloat in UpgradeParser and AsmParser.
Change all references to ConstantFP to use the
APFloat interface rather than double. Remove
the ConstantFP double interfaces.
Use APFloat functions for constant folding arithmetic
and comparisons.
(There are still way too many places APFloat is
just a wrapper around host float/double, but we're
getting there.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41747 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-06 18:13:44 +00:00
Nick Lewycky
455e176ffb
Use isTrueWhenEqual. Thanks Chris!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41741 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-06 02:40:25 +00:00
Nick Lewycky
5a5ff9d7df
When the two operands of an icmp are equal, there are five possible predicates
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that would make the icmp true. Fixes PR1637.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41740 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-06 01:10:22 +00:00
Chuck Rose III
c331d305a0
Forgot to obey 80 column rule. Fixing that.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41725 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-05 20:36:41 +00:00
Chuck Rose III
d4af306aec
Added default parameters to GetElementPtrInstr constructor call. Visual Studio 2k5 was getting confused and was unable to compile it. Suspected compiler error.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41721 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-05 16:54:38 +00:00
Devang Patel
d24e5992e9
Insert cloned loop basic blocks before original loop header.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41713 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-04 20:46:35 +00:00
David Greene
b8f74793b9
Update GEP constructors to use an iterator interface to fix
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GLIBCXX_DEBUG issues.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41697 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-04 15:46:09 +00:00
Anton Korobeynikov
406452dce3
Silence warning while compiling with gcc 4.2
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41676 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-02 22:11:14 +00:00
Evan Cheng
4e9c473c4d
Fix a gcroot lowering bug.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41668 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-01 02:00:51 +00:00
Chris Lattner
92103de8ce
Cut off crazy computation. This helps PR1622 slightly.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41522 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-28 04:23:55 +00:00
Devang Patel
1cd39a4f6e
Use simpler test to filter loops.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41516 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-27 21:34:31 +00:00
David Greene
f1355a55f8
Update InvokeInst to work like CallInst
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41506 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-27 19:04:21 +00:00
Dan Gohman
e3784951af
Change comments to refer to @malloc and @free instead of %malloc and %free.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41488 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-27 16:11:48 +00:00
Anton Korobeynikov
9f528e6280
Don't promote volatile loads/stores. This is needed (for example) to handle setjmp/longjmp properly.
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This fixes PR1520.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41461 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-26 21:43:30 +00:00
Owen Anderson
5dfcf4318a
Don't DSe volatile stores.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41456 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-26 21:14:47 +00:00
Devang Patel
d79faee69a
Move exit condition and exit branch from exiting block into loop header and dominator info. This avoid execution of dead iteration. Loop is already filter in the beginning such that this change is safe.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41394 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-25 02:39:24 +00:00
Devang Patel
be97c986e1
Constant split values needs upper bound and lower bound check, just like any other split value.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41389 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-25 01:09:14 +00:00
Devang Patel
4a69da9cb0
While calculating upper loop bound for first loop and lower loop bound for second loop, take care of edge cases.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41387 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-25 00:56:38 +00:00
Devang Patel
7097e9a710
Fix regression that I caused yesterday night while adding logic to select appropriate split condition branch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41365 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-24 19:32:26 +00:00
Devang Patel
4259fe3281
It is not safe to execute split condition's true branch first all the time. If split
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condition predicate is GT or GE then execute false branch first.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41358 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-24 06:17:19 +00:00
Devang Patel
c830aee8e8
Reject ICMP_NE as index split condition.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41357 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-24 06:02:25 +00:00
Devang Patel
b88e4200cf
Tightenup loop filter.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41356 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-24 05:36:56 +00:00
Devang Patel
7237d1167a
Remove incomplete cost analysis.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41354 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-24 05:21:13 +00:00
Chris Lattner
9132a2b818
rename APInt::toString -> toStringUnsigned for symmetry with toStringSigned()
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Add an APSInt::toString() method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41309 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-23 05:15:32 +00:00
Devang Patel
40fc353a0d
Remove dead code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41295 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-22 21:07:41 +00:00
Devang Patel
a24d918063
Fix typo.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41292 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-22 20:55:18 +00:00
Devang Patel
a8644e306d
Cosmetic change
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"True Loop" and "False Loop" naming terminology to refer two loops
after loop cloning is confusing. Instead just use A_Loop and B_Loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41287 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-22 19:33:29 +00:00
Devang Patel
dc52395353
Refactor loop condition check in a separate function.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41282 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-22 18:27:01 +00:00
Devang Patel
ea0fa97334
Fix thinko.
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Starting value of second loop's induction variable can not be lower
then starting value of original loop's induction variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41280 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-22 18:07:47 +00:00
Devang Patel
0b8e02b704
Rename bunch of variables.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41250 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-21 21:12:02 +00:00
Devang Patel
60cbab4252
Preserve LCSSA.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41246 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-21 19:47:46 +00:00
Devang Patel
b7211a2ce1
Use SmallVector instead of std::vector.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41207 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-21 00:31:24 +00:00
Devang Patel
1cc2ec8d20
s/ExitBlock/ExitingBlock/g
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41204 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-20 23:51:18 +00:00
Devang Patel
ebc5fea695
Replace indunction variable with split value in loop body.
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This fixes art miscompile.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41195 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-20 20:49:01 +00:00
Devang Patel
d651f657f2
Do not split loops rejected by processOneIterationLoop().
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41194 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-20 20:24:15 +00:00
Nick Lewycky
6694e31c49
Oops, remove assert that wasn't meant to be committed.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41170 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-18 23:21:28 +00:00
Nick Lewycky
c721223f73
Never insert duplicate edges.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41169 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-18 23:18:03 +00:00
Nick Lewycky
af5cbc82bb
Typo.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41168 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-18 15:08:56 +00:00
Devang Patel
20d260a193
Avoid spliting loops where two split condition branches are not independent.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41148 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-18 00:00:32 +00:00
Devang Patel
96bf524b53
When one branch of condition is eliminated then head of the other
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branch is not necessary immediate dominators of merge blcok in all cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41144 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-17 21:59:16 +00:00
Owen Anderson
1defe2df5d
Factor out some code into a helper function.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41131 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-16 22:51:56 +00:00
Owen Anderson
62bc33c954
Add some more comments to GVN.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41129 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-16 22:02:55 +00:00
Devang Patel
7375bb9c8c
Dominance frontier is now required.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41096 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-15 03:34:53 +00:00
Devang Patel
5b8ec614f5
Cleanup removeBlocks.
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Use dominance frontier to fixup incoming edges of successor blocks not domianted by DeadBB.
Use df_iterator to walk and delete basic blocks dominated by DeadBB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41095 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-15 03:31:47 +00:00
Reid Spencer
e9dd95ad9c
Remove unneeded header file.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41094 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-15 03:01:04 +00:00
Devang Patel
3fe4f2135a
Avoid triangle loops.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41093 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-15 02:14:55 +00:00
Devang Patel
4f5d78e9c1
Break infinite loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41091 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 23:59:17 +00:00
Devang Patel
4e8061cbda
Avoid nested loops at the moment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41090 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 23:53:57 +00:00
Devang Patel
a6a8663894
Fix dominance frontier update while removing blocks.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41082 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 18:35:57 +00:00
Owen Anderson
31f496755a
Eliminate PHI nodes with constant values during normal GVN processing, even when
...
they're not related to eliminating a load.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41081 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 18:33:27 +00:00
Owen Anderson
36057c7834
Be more aggressive in pruning unnecessary PHI nodes when doing PHI construction.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41080 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 18:16:29 +00:00
Owen Anderson
3e75a42ee2
Make GVN iterative.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41078 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 18:04:11 +00:00
Owen Anderson
8e8278e7fe
Fix a case where GVN was failing to return true when it had, in fact, modified
...
the function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41077 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 17:59:48 +00:00
Devang Patel
ada054a9ea
Handle last value assignments.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41063 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 01:30:57 +00:00
Devang Patel
ebcb52aa89
StartValue is already calculated.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41062 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-14 00:15:45 +00:00
Devang Patel
21eca2a9cf
Preserve simple analysis.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41054 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-13 22:22:13 +00:00
Devang Patel
fc4c5f82f8
Preserve dominator info.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41053 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-13 22:13:24 +00:00
Devang Patel
6acc9e6b7b
If NewBB dominates DestBB then DestBB is not part of NewBB's dominance frontier.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41051 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-13 21:59:17 +00:00
Devang Patel
98147a306e
Split loops and do CFG cleanup.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41029 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-12 07:02:51 +00:00
Reid Spencer
9626a9c700
Remove unused variables.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41028 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-12 04:45:36 +00:00
Chris Lattner
8d2e88806b
Transform a load from an undef/zero global into an undef/global even if we
...
have complex pointer manipulation going on. This allows us to compile
stuff like this:
__m128i foo(__m128i x){
static const unsigned int c_0[4] = { 0, 0, 0, 0 };
__m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
x = _mm_unpacklo_epi8(x, v_Zero);
return x;
}
into:
_foo:
xorps %xmm1, %xmm1
punpcklbw %xmm1, %xmm0
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41022 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-11 18:48:48 +00:00
Devang Patel
423c8b29b8
Clone loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40998 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 18:07:13 +00:00
Devang Patel
4bc2a0b420
Add utility to clone loops.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40997 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 17:59:47 +00:00
Devang Patel
acb8c09e27
Remove unncessary duplication.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40979 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 00:59:03 +00:00
Devang Patel
23a19f82a7
Calculate exit and start value of true loop and false loop respectively.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40978 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 00:53:35 +00:00
Devang Patel
bacf5193cf
ExitCondition and Induction variable are loop constraints
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not split condition constraints.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40977 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-10 00:33:50 +00:00
Chris Lattner
f2369f2042
when we see a unaligned load from an insufficiently aligned global or
...
alloca, increase the alignment of the load, turning it into an aligned load.
This allows us to compile:
#include <xmmintrin.h>
__m128i foo(__m128i x){
static const unsigned int c_0[4] = { 0, 0, 0, 0 };
__m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
x = _mm_unpacklo_epi8(x, v_Zero);
return x;
}
into:
_foo:
punpcklbw _c_0.5944, %xmm0
ret
.data
.lcomm _c_0.5944,16,4 # c_0.5944
instead of:
_foo:
movdqu _c_0.5944, %xmm1
punpcklbw %xmm1, %xmm0
ret
.data
.lcomm _c_0.5944,16,2 # c_0.5944
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40971 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-09 19:05:49 +00:00
Owen Anderson
9528f11481
Make NonLocal and None const in the right way. :-)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40961 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-09 04:42:44 +00:00
Devang Patel
c9d123dca9
Traverse loop blocks' terminators to find split candidates.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40960 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-09 01:39:01 +00:00
Devang Patel
9704fcf505
Add cost analysis.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40952 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 22:25:28 +00:00
Devang Patel
787a713bb2
Preserve dom info while processing one iteration loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40947 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 21:39:47 +00:00
Owen Anderson
8cad423d94
Change the None and NonLocal markers in memdep to be const.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40946 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 21:39:39 +00:00
Devang Patel
9021c7001e
Clear split info.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40944 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 21:18:27 +00:00
Devang Patel
71554b8e3c
Handle multiple split conditions.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40941 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 21:02:17 +00:00
Owen Anderson
838014ee5b
Global values also don't undead-ify pointers in our dead alloca's set.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40936 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 19:12:31 +00:00
Owen Anderson
362bb52108
Make handleEndBlock significantly faster with one trivial improvement,
...
and one hack to avoid hitting a bad case when the alias analysis is imprecise.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40935 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 18:38:28 +00:00
Owen Anderson
df359c264e
Small improvement: if a function doesn't access memory, we don't need to scan
...
it for potentially undeading pointers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40933 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 17:58:56 +00:00
Owen Anderson
bb3abf41a8
Add some comments, remove a dead argument, and simplify some control flow.
...
No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40932 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 17:50:09 +00:00
Owen Anderson
c182f17aed
A few more small cleanups.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40922 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 06:06:02 +00:00
Owen Anderson
6ca4cb3755
First round of cleanups from Chris' feedback.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40919 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 04:52:29 +00:00
Devang Patel
6a2bfdaab6
Embrace patch review feedback.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40915 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08 01:51:27 +00:00
Devang Patel
002fe25dd7
Fix new compare instruction's signness. Caught by Chris during review.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40912 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07 23:17:52 +00:00
Owen Anderson
a37226af81
Don't insert nearly as many redundant phi nodes.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40909 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07 23:12:31 +00:00
Devang Patel
8431a1cbcc
Use eraseFromParent().
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40903 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07 17:45:35 +00:00
David Greene
32fe3de0fe
Fix comment typo
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40898 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07 16:52:03 +00:00
David Greene
8ff18e9c99
Fix GLIBCXX_DEBUG error triggered by incrementing erased iterator.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40897 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07 16:44:38 +00:00
Devang Patel
fee76bd9ba
Begin loop index split pass.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40883 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07 00:25:56 +00:00
Nick Lewycky
f947b3edb5
It's safe to fold not of fcmp.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40870 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-06 20:04:16 +00:00
David Greene
242be6e0ff
Make this code more efficient.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40861 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-06 15:09:17 +00:00
Chris Lattner
3589df8013
remove some dead lines
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40859 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-06 06:21:06 +00:00
Reid Spencer
81a7572f1a
Silence some warnings from doxygen about @param argument name not matching the
...
actual argument name of the documented function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40851 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-05 19:35:22 +00:00
Chris Lattner
a9ff5eb76e
at the end of instcombine, explicitly clear WorklistMap.
...
This shrinks it down to something small. On the testcase
from PR1432, this speeds up instcombine from 0.7959s to 0.5000s,
(59%)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40840 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-05 08:47:58 +00:00
Chris Lattner
f12f8def39
rewrite the code used to construct pruned SSA form with the IDF method.
...
In the old way, we computed and inserted phi nodes for the whole IDF of
the definitions of the alloca, then computed which ones were dead and
removed them.
In the new method, we first compute the region where the value is live,
and use that information to only insert phi nodes that are live. This
eliminates the need to compute liveness later, and stops the algorithm
from inserting a bunch of phis which it then later removes.
This speeds up the testcase in PR1432 from 2.00s to 0.15s (14x) in a
release build and 6.84s->0.50s (14x) in a debug build.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40825 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 22:50:14 +00:00
Chris Lattner
0ec8df3d5f
Factor out a whole bunch of code into it's own method.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40824 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 21:14:29 +00:00
Chris Lattner
127ed3c929
Use getNumPreds(BB) instead of computing them manually. This is a very small but
...
measurable speedup.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40823 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 21:06:15 +00:00
Chris Lattner
1e76af3011
Change the rename pass to be "tail recursive", only adding N-1 successors
...
to the worklist, and handling the last one with a 'tail call'. This speeds
up PR1432 from 2.0578s to 2.0012s (2.8%)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40822 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 20:40:27 +00:00
Chris Lattner
e7b653dabe
cache computation of #preds for a BB. This speeds up
...
mem2reg from 2.0742->2.0522s on PR1432.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40821 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 20:24:50 +00:00
Chris Lattner
384c7e0436
reserve operand space for phi nodes when we insert them.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40820 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 20:14:34 +00:00
Chris Lattner
6c81213b4c
use continue to avoid nesting, no functionality change.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40819 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 20:07:06 +00:00
Chris Lattner
fb312c7e44
Promoting allocas with the 'single store' fastpath is
...
faster than with the 'local to a block' fastpath. This speeds
up PR1432 from 2.1232 to 2.0686s (2.6%)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40818 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 20:03:23 +00:00
Chris Lattner
7a5745b38c
When PromoteLocallyUsedAllocas promoted allocas, it didn't remember
...
to increment NumLocalPromoted, and didn't actually delete the
dead alloca, leading to an extra iteration of mem2reg.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40817 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 20:01:43 +00:00
Chris Lattner
59a2837715
std::map -> DenseMap
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40816 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 19:52:20 +00:00
Nick Lewycky
7956dae870
Clean up comments, fix up some confusing code logic.
...
Predsimplify fails llvm-gcc bootstrap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40815 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 18:45:32 +00:00
Chris Lattner
c69e491575
fix a logic bug where we wouldn't promote single store allocas if the
...
stored value was a non-instruction value. Doh.
This increase the # single store allocas from 8982 to 9026, and
speeds up mem2reg on the testcase in PR1432 from 2.17 to 2.13s.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40813 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 02:45:02 +00:00
Chris Lattner
4f63e76cda
When we do the single-store optimization, delete both the store
...
and the alloca so they don't get reprocessed.
This speeds up PR1432 from 2.20s to 2.17s.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40812 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 02:38:38 +00:00
Chris Lattner
d0458e5d4f
Three improvements:
...
1. Check for revisiting a block before checking domination, which is faster.
2. If the stored value isn't an instruction, we don't have to check for domination.
3. If we have a value used in the same block more than once, make sure to remove the
block from the UsingBlocks vector. Not doing so forces us to go through the slow
path for the alloca.
The combination of these improvements increases the number of allocas on the fastpath
from 8935 to 8982 on PR1432. This speeds it up from 2.90s to 2.20s (31%)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40811 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 02:32:22 +00:00
Chris Lattner
c3f6ea8330
switch from using a std::set to using a SmallPtrSet. This speeds up the
...
testcase in PR1432 from 6.33s to 2.90s (2.22x)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40810 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 02:21:22 +00:00
Chris Lattner
b776a335b1
In mem2reg, when handling the single-store case, make sure to remove
...
a using block from the list if we handle it. Not doing this caused us
to not be able to promote (with the fast path) allocas which have uses (whoops).
This increases the # allocas hitting this fastpath from 4042 to 8935 on the
testcase in PR1432, speeding up mem2reg by 2.6x
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40809 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 02:15:24 +00:00
Chandler Carruth
6994040a95
This is the patch to provide clean intrinsic function overloading support in LLVM. It cleans up the intrinsic definitions and generally smooths the process for more complicated intrinsic writing. It will be used by the upcoming atomic intrinsics as well as vector and float intrinsics in the future.
...
This also changes the syntax for llvm.bswap, llvm.part.set, llvm.part.select, and llvm.ct* intrinsics. They are automatically upgraded by both the LLVM ASM reader and the bitcode reader. The test cases have been updated, with special tests added to ensure the automatic upgrading is supported.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40807 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 01:51:18 +00:00
Chris Lattner
5dd75b4ca7
split rewriting of single-store allocas into its own
...
method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40806 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 01:47:41 +00:00
Chris Lattner
bbe104002f
refactor some code to shrink PromoteMem2Reg::run a bit
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40805 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 01:41:18 +00:00
Chris Lattner
483ce14bf4
add a typedef, no other change.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40804 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 01:19:38 +00:00
Chris Lattner
63cdcaa3d6
avoid an unneeded vector copy. This speeds up mem2reg on the testcase
...
in PR1432 by 6%
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40803 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 01:07:49 +00:00
Chris Lattner
ac4aa4be9b
make RenamePassWorkList a local var instead of an ivar.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40802 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-04 01:04:40 +00:00
Owen Anderson
ab8702787d
Fix a subtle miscompilation. This allows 197.parser to be compiled correctly.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40791 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-03 19:59:35 +00:00
Owen Anderson
4b55c3b0f1
Fix a subtle iterator invalidation bug in a recursive algorithm.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40776 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-03 11:03:26 +00:00
Chris Lattner
b0e71edb6b
Fix an accidental commit.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40758 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-02 21:33:36 +00:00
Owen Anderson
9fed589912
Fix 80 col. violations.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40751 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-02 18:20:52 +00:00
Owen Anderson
830db6a00e
Fix 80 col. violations.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40750 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-02 18:16:06 +00:00