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Author SHA1 Message Date
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
Nick Lewycky
d2f0db1b19 Also update the README. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60188 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 22:41:45 +00:00
Nick Lewycky
8ca5248522 Chris prefers icmp/select over udiv! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60187 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 22:41:10 +00:00
Nick Lewycky
df563ca1f3 Add a synthetic missed optimization. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60186 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 22:12:22 +00:00
Nick Lewycky
895f085385 Add a couple of missed optimizations on integer vectors. Multiply and divide 
by 1, as well as multiply by -1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60182 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 20:21:08 +00:00
Chris Lattner
9918fb5631 defensive patch: if CGP is merging a block with the entry block, make sure 
it ends up being the entry block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60180 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 19:29:14 +00:00
Chris Lattner
3d86d242c6 Fix PR3138: if we merge the entry block into another block, make sure to 
move the other block back up into the entry position!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60179 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 19:25:19 +00:00
Nick Lewycky
a89d102b32 Silence a warning. 
Despite changing the order of evaluation, this doesn't actually change the
meaning of the statement.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60177 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 17:29:52 +00:00
Nuno Lopes
440954c64b fix build on some machines. thanks buildbot 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60175 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 16:42:44 +00:00
Nuno Lopes
4ba9aac839 fix my previous commit r60064: compare strings instead of pointers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60174 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 16:37:02 +00:00
Chris Lattner
4aebaee0e4 switch InstCombine::visitLoadInst to use 
FindAvailableLoadedValue


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60169 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 08:56:30 +00:00
Chris Lattner
e3a0884ddf improve const correctness. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60168 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 08:39:18 +00:00
Chris Lattner
ee6e10bc8e enhance FindAvailableLoadedValue to make use of AliasAnalysis 
if it has it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60167 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 08:18:12 +00:00
Chris Lattner
52c95856b4 move FindAvailableLoadedValue from JumpThreading to Transforms/Utils. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60166 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 08:10:05 +00:00
Bill Wendling
b7c0d94465 Get rid of bogus "control may reach end of non-void function ‘...’ being 
inlined" message.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60165 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-27 08:00:12 +00:00