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Author SHA1 Message Date
Chris Lattner
cae30afc34 don't require GVN to work on dead values, just make the 
test return the loaded value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60252 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 21:21:48 +00:00
Chris Lattner
3a76be584b Fix a thinko that manifested as a crash on clamav last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60251 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 20:29:04 +00:00
Nick Lewycky
822293a40c Fix spelling mistake. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60250 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 20:13:25 +00:00
Chris Lattner
233336ebc5 tidy up some variable names. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60243 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 09:22:14 +00:00
Chris Lattner
8c4652790e rename some maps. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60242 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 09:20:15 +00:00
Chris Lattner
00314b3d84 rename some variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60241 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 09:15:21 +00:00
Chris Lattner
a161ab06d9 eliminate a bunch of code in favor of using AliasAnalysis::getModRefInfo. 
Put a some code back to handle buggy behavior that GVN expects: it wants
loads to depend on each other, and accesses to depend on their allocations.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60240 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 09:09:48 +00:00
Torok Edwin
10ca770020 protect against negative values that would exceed allowed bit width 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60239 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 08:52:45 +00:00
Chris Lattner
25a081439f simplify some code and rename some variables. Reduce nesting. 
Use getTypeStoreSize instead of ABITypeSize for in-memory size
in a couple places.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60238 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 08:51:16 +00:00
Chris Lattner
b9cf75a15f apparently GCC doesn't believe that I understand C 
precedence rules.  Pacify it.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60237 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 08:36:39 +00:00
Duncan Sands
3f7dba7b17 Typo fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60236 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 08:03:35 +00:00
Chris Lattner
5391a1d804 Split getDependency into getDependency and getDependencyFrom, the 
former does caching, the later doesn't.  This dramatically simplifies
the logic in getDependency and getDependencyFrom.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60234 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 03:47:00 +00:00
Bill Wendling
411052bb96 Temporarily revert r60195. It's causing an optimized bootstrap of llvm-gcc to fail. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60233 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 03:43:04 +00:00
Chris Lattner
7f52422a3c Now that DepType is private, we can start cleaning up some of its uses: 
Document the Dirty value more precisely, use it for the uninitialized
DepResultTy value.  Change reverse mappings to be from an instruction*
instead of DepResultTy, and stop tracking other forms.  This makes it more
clear that we only care about the instruction cases.

Eliminate a DepResultTy,bool pair by using Dirty in the local case as well,
shrinking the map and simplifying the code.

This speeds up GVN by ~3% on 403.gcc.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60232 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 03:22:12 +00:00
Chris Lattner
4c72400625 Introduce and use a new MemDepResult class to hold the results of a memdep 
query.  This makes it crystal clear what cases can escape from MemDep that
the clients have to handle.  This also gives the clients a nice simplified
interface to it that is easy to poke at.

This patch also makes DepResultTy and MemoryDependenceAnalysis::DepType
private, yay.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60231 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 02:29:27 +00:00
Chris Lattner
39f372e23e Reimplement the internal abstraction used by MemDep in terms 
of a pointer/int pair instead of a manually bitmangled pointer.
This forces clients to think a little more about checking the 
appropriate pieces and will be useful for internal 
implementation improvements later.

I'm not particularly happy with this.  After going through this
I don't think that the clients of memdep should be exposed to
the internal type at all.  I'll fix this in a subsequent commit.

This has no functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60230 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 01:43:36 +00:00
Chris Lattner
d63e618212 Fix sentinels to use correctly 'aligned' pointers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60229 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 01:36:16 +00:00
Chris Lattner
9ac30537aa Fix spello, add DenseMapInfo specialization for PointerIntPair. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60228 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-29 01:18:05 +00:00
Chris Lattner
d55da4de04 fix comment typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60227 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 23:57:26 +00:00
Chris Lattner
762ac83271 fix a bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60225 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 23:36:15 +00:00
Chris Lattner
34b763694e add a generic "bitmangled pointer" class, which allows a parameterized 
pointer and integer type to be used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60224 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 23:31:44 +00:00
Chris Lattner
d3d12ecadd Fix PR3141 by ensuring that MemoryDependenceAnalysis::removeInstruction 
properly updates the reverse dependency map when it installs updated 
dependencies for instructions that depend on the removed instruction.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60222 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 22:51:08 +00:00
Chris Lattner
5425f22fa3 don't revisit instructions off the beginning of the block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60221 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 22:50:08 +00:00
Chris Lattner
956033a4f5 comment cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60220 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 22:41:36 +00:00
Chris Lattner
baad8881f1 more cleanups for MemoryDependenceAnalysis::removeInstruction, 
no functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60219 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 22:28:27 +00:00
Chris Lattner
5f589dc77f random cleanups, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60218 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 22:04:47 +00:00
Chris Lattner
b390b1728e forward declare CallSite instead of #includ'ing it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60217 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 21:47:19 +00:00
Chris Lattner
0e575f428c Run verifyRemoved from removeInstruction when -debug is specified. 
This shows the root problem behind PR3141.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60216 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 21:45:17 +00:00
Chris Lattner
8b589fa135 rename "ping" to "verifyRemoved". I don't know why 'ping' what chosen, 
but it doesn't make any sense at all.

Also make the method const, private, and fit in 80 cols while we're at it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60215 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 21:42:09 +00:00
Chris Lattner
e85866313a comment and indentation improvements. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60214 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 21:36:43 +00:00
Chris Lattner
565f96b196 simplify some code, remove escaped newline. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60213 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 21:29:52 +00:00
Chris Lattner
57d4012f65 remove mysterious escaped newlines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60211 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 21:16:44 +00:00
Chris Lattner
f5102a0f08 don't call MergeBasicBlockIntoOnlyPred on a block whose only 
predecessor is itself.  This doesn't make sense, and this is
a dead infinite loop anyway.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60210 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 19:54:49 +00:00
Duncan Sands
c6dbe7fbad Add include files needed when building with 
gcc 4.4 (due to use of sprintf).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60209 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 10:20:03 +00:00
Duncan Sands
f9a67a8943 Fix build with gcc-4.4: it doesn't like PICStyle 
being both a namespace and a variable name.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60208 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 09:29:37 +00:00
Chris Lattner
7605730ba8 rewrite RecursivelyDeleteTriviallyDeadInstructions to use a more efficient 
formulation that doesn't require set lookups or scanning a set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60203 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 01:20:46 +00:00
Chris Lattner
2872177834 remove some weirdness that came from the LSR code that has 
nothing to do with dead instruction elimination.  No tests in
dejagnu depend on this, so I don't know what it was needed for.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60202 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 00:58:15 +00:00
Chris Lattner
925451e020 rewrite a big chunk of how DSE does recursive dead operand 
elimination to use more modern infrastructure.  Also do a bunch
of small cleanups.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60201 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 00:27:14 +00:00
Mikhail Glushenkov
bfdef3a6b2 Scrap some boilerplate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60200 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 00:14:11 +00:00
Mikhail Glushenkov
ad746beb64 Support multiple compilation graph definitions. Not terribly useful, but makes the code more generic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60199 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 00:13:47 +00:00
Mikhail Glushenkov
739c720e66 Add 'hidden' and 'really_hidden' option properties. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60198 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 00:13:25 +00:00
Mikhail Glushenkov
3321b0ff24 Documentation: clarify what is meant by 'multiple edges'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60197 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-28 00:12:09 +00:00
Chris Lattner
9fd4955c6a delete ErasePossiblyDeadInstructionTree, replacing uses of it with 
RecursivelyDeleteTriviallyDeadInstructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60196 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 23:25:44 +00:00
Chris Lattner
1363949380 Simplify LoopStrengthReduce::DeleteTriviallyDeadInstructions by 
making it use RecursivelyDeleteTriviallyDeadInstructions to do
the heavy lifting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60195 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 23:23:35 +00:00
Chris Lattner
564c0a2330 enhance RecursivelyDeleteTriviallyDeadInstructions to make 
PHIs dead if they are single-value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60194 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 23:18:11 +00:00
Chris Lattner
4f02c74a8e Enhance RecursivelyDeleteTriviallyDeadInstructions to optionally 
return a list of deleted instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60193 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 23:14:34 +00:00
Chris Lattner
a0d4486073 use continue to reduce indentation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60192 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 23:00:20 +00:00
Chris Lattner
3481f24c06 remove doConstantPropagation and dceInstruction, they are just 
wrappers around the interesting code and use an obscure iterator
abstraction that dates back many many years.

Move EraseDeadInstructions to Transforms/Utils and name it
RecursivelyDeleteTriviallyDeadInstructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60191 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 22:57:53 +00:00
Chris Lattner
15678533f3 simplify code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60190 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 22:56:14 +00:00
Chris Lattner
cb03f8547d simplify this logic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60189 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 22:46:09 +00:00