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641 Commits

Author SHA1 Message Date
Chris Lattner
bd1a90ecc7 Fix ADCE/2003-12-19-MergeReturn.llx 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10539 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-19 09:08:34 +00:00
Chris Lattner
a3df8a964a Remove the wierd "Operands" loop, by traversing basicblocks in reverse order 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10536 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-19 08:18:16 +00:00
Chris Lattner
e4365b2e8c Implement LICM/sink_multiple.ll, by sinking all possible instructions in the 
loop before hoisting any.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10534 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-19 07:22:45 +00:00
Chris Lattner
60921c9aa1 Factor code out into the Utils library 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10530 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-19 05:58:40 +00:00
John Criswell
47df12d80d Reverted back to previous revision - this was previously merged 
according to the CVS log messages.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10517 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 17:19:19 +00:00
John Criswell
d000e1dc2f Merged in RELEASE_11. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10516 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 16:43:17 +00:00
Chris Lattner
ba7df4c482 When we delete instructions from the loop, make sure to remove them from the 
AliasSetTracker as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10507 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-18 08:12:32 +00:00
Chris Lattner
9e45d2e0e8 Fix for PR185 & IndVarsSimplify/2003-12-15-Crash.llx 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10473 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-15 17:34:02 +00:00
Chris Lattner
d64152a708 Refactor code just a little bit, allowing us to implement TailCallElim/return_constant.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10467 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-14 23:57:39 +00:00
Chris Lattner
00ad4a2d17 Do not promote volatile alias sets into registers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10458 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-14 04:52:31 +00:00
Chris Lattner
ea9403f2aa Fix LICM/2003-12-11-SinkingToPHI.ll, and quite possibly all of the other known problems in the universe. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10409 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-11 22:23:32 +00:00
Chris Lattner
7d3ced934f Fix bug: LICM/sink_multiple_exits.ll 
Thanks for pointing this out John  :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10387 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 22:35:56 +00:00
Chris Lattner
df45bd3803 Don't allow dead instructions to stop sinking early. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10386 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 20:43:29 +00:00
Chris Lattner
88369d214f Fix bug: IndVarsSimplify/2003-12-10-RemoveInstrCrash.llx 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10385 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 20:43:04 +00:00
Chris Lattner
ba4f3f6a41 Finegrainify namespacification 
Reorder #includes
Implement: IndVarsSimplify/2003-12-10-IndVarDeadCode.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10376 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 18:06:47 +00:00
Chris Lattner
e3cfe8d563 Simplify code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10371 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 16:58:24 +00:00
Chris Lattner
f594a03197 Avoid performing two identical lookups when one will suffice 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10370 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 16:57:24 +00:00
Chris Lattner
0ed2da9ac7 Make LICM itself a bit more efficient, and make the generated code more efficient too: don't insert a store in every exit block, because a particular block may be exited to more than once by a loop 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10369 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 15:56:24 +00:00
Chris Lattner
a2706518f9 Implement instruction sinking out of loops. This still can do a little bit 
better job, but this is the majority of the work.  This implements
LICM/sink*.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10358 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-10 06:41:05 +00:00
Chris Lattner
ed6dfc2856 Refactor code a little bit, eliminating the gratuitous InstVisitor, which 
should make subsequent changes simpler.  This also allows us to hoist vaarg
and vanext instructions


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10342 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-09 19:32:44 +00:00
Chris Lattner
92094b4d92 Fine grainify namespacification 
Code cleanups
Make LICM::SafeToHoist marginally more efficient


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10341 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-09 17:18:00 +00:00
Chris Lattner
cf2f89251d Implement: TailCallElim/accum_recursion_constant_arg.ll 
Also make sure to clean up any PHI nodes that are inserted which are pointless.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10333 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-08 23:37:35 +00:00
Chris Lattner
543d622ef7 Implement: test/Regression/Transforms/TailCallElim/accum_recursion.ll 
We now insert accumulator variables as necessary to eliminate tail recursion
more aggressively.  This is still fairly limited, but allows us to transform
fib/factorial, and other functions into nice happy loops.  :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10332 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-08 23:19:26 +00:00
Chris Lattner
7152da38ef Cleanup and restructure the code to make it easier to read and maintain. 
The only functionality change is that we now implement:
  Regression/Transforms/TailCallElim/intervening-inst.ll

Which is really kinda pointless, because it means that trivially dead code
does not interfere with -tce, but trivially dead code probably wouldn't be
around anytime when this pass is run anyway.

The point of including this change it to support other more aggressive
transformations when we have the analysis capabilities to do so.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10312 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-08 05:34:54 +00:00
Chris Lattner
67b1e1b89f * Finegrainify namespacification 
* Transform: free <ty>* (cast <ty2>* X to <ty>*) into free <ty2>* X


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10303 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-07 01:24:23 +00:00
Chris Lattner
d866473094 Finegrainify namespacification 
Fix regressions ScalarRepl/basictest.ll & arraytest.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10287 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-12-02 17:43:55 +00:00
Chris Lattner
be883a23ed Do not use index type to determine what it is indexing into! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10226 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-25 21:09:18 +00:00
Chris Lattner
c8ecd22037 Do not crash when deleing a region with a dead invoke instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10161 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-22 02:13:08 +00:00
Chris Lattner
35bb52f8b1 Finegrainify namespacification 
The module stripping pass should not strip symbols on external globals


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10157 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-22 01:29:35 +00:00
Chris Lattner
108e4ab159 Minor cleanups and simplifications 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10127 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-21 16:52:05 +00:00
Chris Lattner
f8485c6434 Start using the nicer terminator auto-insertion API 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10111 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-20 18:25:24 +00:00
Chris Lattner
faa45ce300 Fix PR116 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10032 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-16 21:39:27 +00:00
Chris Lattner
917e804253 Implement feature: InstCombine/2003-11-13-ConstExprCastCall.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9981 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-13 19:17:02 +00:00
Brian Gaeke
d0fde30ce8 Put all LLVM code into the llvm namespace, as per bug 109. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9903 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-11 22:41:34 +00:00
Chris Lattner
d23520cd94 Adjust to new critical edge interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9853 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-10 04:10:50 +00:00
Misha Brukman
ed1f7c81aa Declare FunctionPasses as such so that they can be used in FunctionPassManager. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9768 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-07 17:20:18 +00:00
Chris Lattner
1bcc70d240 Fix flawed logic that was breaking several SPEC benchmarks, including gzip and crafty. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9731 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-05 17:31:36 +00:00
Chris Lattner
d65460f133 Fix bug with previous implementation: 
-      // ~(c-X) == X-(c-1) == X+(-c+1)
+      // ~(c-X) == X-c-1 == X+(-c-1)

Implement: C - ~X == X + (1+C)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9715 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-05 01:06:05 +00:00
Chris Lattner
ad5b4fb6b7 Minor cleanup, plus implement InstCombine/xor.ll:test17 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9711 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-04 23:50:51 +00:00
Chris Lattner
689d24b6ed Implement InstCombine/xor.ll:test(15|16) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9708 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-04 23:37:10 +00:00
Chris Lattner
6870805117 Implement InstCombine/cast-set.ll:test6[a]. This improves code generated for 
a hot function in em3d


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9673 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-03 05:17:03 +00:00
Chris Lattner
de90b76670 Implement InstCombine/cast-set.ll: test1, test2, test7 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9670 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-03 04:25:02 +00:00
Chris Lattner
8ee9204309 Fix bug with zero sized casts 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9667 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-03 01:29:41 +00:00
Chris Lattner
fc07a3473a Fix bug in previous checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9656 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-02 06:54:48 +00:00
Chris Lattner
bc61e661bd Implement transmogriphication of allocation instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9654 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-02 05:57:39 +00:00
Chris Lattner
bb60904469 Fix bug: 2003-10-29-CallSiteResolve.ll & PR70 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9600 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-30 00:46:41 +00:00
Chris Lattner
546fc40d69 Fix PR66 & ScalarRepl/2003-10-29-ArrayProblem.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9585 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-29 17:55:44 +00:00
John Criswell
e488e9360b Added LLVM copyright notice to Makefiles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9312 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-20 22:26:57 +00:00
John Criswell
b576c94c15 Added LLVM project notice to the top of every C++ source file. 
Header files will be on the way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9298 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-20 19:43:21 +00:00
Chris Lattner
3b237fcd38 Change the Opcode enum for PHI nodes from "Instruction::PHINode" to "Instruction::PHI" to be more consistent with the other instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9269 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-19 21:34:28 +00:00
Chris Lattner
cda965e28a ADd support for the new varargs instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9225 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-18 05:56:52 +00:00
Chris Lattner
76590640cf This code does not require random access use_lists 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9156 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-16 16:49:12 +00:00
Chris Lattner
fd05924946 Decrease usage of use_size() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9135 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-15 16:48:29 +00:00
Chris Lattner
4a650af599 Wrap code at 80 columns 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9073 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-13 05:04:27 +00:00
Chris Lattner
98bf436e2e Rename loop preheaders pass to loop simplify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9061 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-12 21:52:28 +00:00
Misha Brukman
cf00c4ab3b Fix spelling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9027 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-10 17:57:28 +00:00
Chris Lattner
929c6fbcbc Update comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8965 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-08 16:56:11 +00:00
Chris Lattner
16b18fdc35 Use a set to keep track of which edges have been noticed as executable already 
to avoid reprocessing PHI nodes needlessly.  This speeds up the big bad PHI
testcase 43%: from 104.9826 to 73.5157s


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8964 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-08 16:55:34 +00:00
Chris Lattner
3d405b07b4 Minor fixes here and there 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8963 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-08 16:21:03 +00:00
Chris Lattner
7d275f459b Avoid building data structures we don't really need. This improves the runtime 
of a test that Bill Wendling sent me from 228.5s to 105s.  Obviously there is
more improvement to be had, but this is a nice speedup which should be "felt"
by many programs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8962 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-08 15:47:41 +00:00
Chris Lattner
d558dc3464 whoops, don't accidentally lose variable names 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8955 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-07 22:58:41 +00:00
Chris Lattner
6c266db54c Fix bug: InstCombine/cast.ll:test11 / PR#7 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8954 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-07 22:54:13 +00:00
Chris Lattner
a44d8a2897 Refactor code a bit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8952 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-07 22:32:43 +00:00
Chris Lattner
6061000b54 Fix bug in previous checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8922 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-07 15:17:02 +00:00
Chris Lattner
4bb7c02eba Minor speedups for the instcombine pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8894 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-06 17:11:01 +00:00
Chris Lattner
43f820d1f7 Change the interface to PromoteMemToReg to also take a DominatorTree 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8883 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-05 21:20:13 +00:00
Chris Lattner
b55803a9f4 simplify-cfg is really a function pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8868 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-05 19:14:16 +00:00
Chris Lattner
6b032052cc Implement InstCombine/add.ll:test17 & 18 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8817 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-02 15:11:26 +00:00
Chris Lattner
332ae7f501 Fix bug: IndVarsSimplify/2003-09-23-NotAtTop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8689 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-23 20:26:48 +00:00
Misha Brukman
22b9aab760 Credits now go into the top-level CREDITS.TXT 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8662 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-22 21:57:56 +00:00
Chris Lattner
021c190f8d Squelch warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8659 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-22 20:33:34 +00:00
Chris Lattner
02a3be020a Rename Function::getEntryNode -> getEntryBlock 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8625 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-20 14:39:18 +00:00
Chris Lattner
d452ebd0bf Fix a really obvious huge gaping bug, add a comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8620 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-20 05:24:00 +00:00
Chris Lattner
3fc6ef1bb9 Expose the TCE pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8619 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-20 05:14:13 +00:00
Chris Lattner
2240d2b3f7 New transformation: tail recursion elimination 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8618 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-20 05:03:31 +00:00
Chris Lattner
62a355cc6e Implement InstCombine/and.ll:test(15|16) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8607 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-19 19:05:02 +00:00
Chris Lattner
bd7b5fff82 pull a large nested conditional out into its own function 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8605 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-19 17:17:26 +00:00
Chris Lattner
9d5890d435 Implement InstCombine/add.ll:test(15|16) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8604 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-19 15:35:42 +00:00
Chris Lattner
a497748fb1 Make sure to cannonicalize loops before running indvar simplify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8502 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-12 16:45:01 +00:00
Chris Lattner
8fce16ef1a Do not return success after checking only the FIRST USE of a gep instruction. 
Instead, check all uses.
This fixes bug: ScalarRepl/2003-09-12-IncorrectPromote.ll
This also fixes the miscompilation of Ptrdist/bc


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8493 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-12 16:02:12 +00:00
Chris Lattner
fe7ea0da17 Minor optimization efficiency improvement: 
- Run mem2reg promotion first
  - Only rerun passes if the previous thing changed something


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8490 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-12 15:36:03 +00:00
Chris Lattner
515c97c230 Simplify code 
Implement InstCombine/mul.ll:test9


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8488 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-11 22:24:54 +00:00
Misha Brukman
3cfb6b13c0 Apostrophes are only used for possession and quoting. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8473 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-11 16:58:31 +00:00
Chris Lattner
38aec32560 Integrate functionality of the mem2reg pass directly into this pass to make 
the combination more effective


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8471 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-11 16:45:55 +00:00
Chris Lattner
c444a4228f Renamed DominatorTree::Node::getNode() -> getBlock() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8469 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-11 16:26:13 +00:00
Misha Brukman
352361b409 Spell `definite' correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8467 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-11 15:32:37 +00:00
Chris Lattner
545a76ced8 Unwind instructions are intrinsically alive, just like returns 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8462 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-10 20:38:14 +00:00
Chris Lattner
065a616ada Fix spell-o's 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8431 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-10 05:29:43 +00:00
Chris Lattner
3adf51d022 Spelling fixes. I think that "cannonical" is ok, but "canonical" appears to 
be the canonical form for the word


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8430 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-10 05:24:46 +00:00
Chris Lattner
c01ccfd503 Fix up file header 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8428 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-10 05:10:34 +00:00
Misha Brukman
dfa5f83c8e Spell `occurrence' correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8425 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-09 21:54:45 +00:00
Chris Lattner
36143fc444 Add support for the unwind instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8408 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-08 18:54:55 +00:00
Chris Lattner
61c1e7e32d Do not hoist volatile loads 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8399 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-08 18:17:14 +00:00
Chris Lattner
3186d275f7 Fix bug: TailDuplicate/2003-08-31-UnreachableBlocks.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8276 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-31 21:17:44 +00:00
Chris Lattner
a15854c9fe ScalarRepl does not modify the CFG. Say so! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8243 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-31 00:45:13 +00:00
Chris Lattner
99b28e632f Fix bug: SCCP/2003-08-26-InvokeHandling.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8152 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-27 01:08:35 +00:00
Chris Lattner
086cb002d2 Fix bug: TailDup/2003-08-23-InvalidatedPointers.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8078 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-23 20:08:30 +00:00
Misha Brukman
ef6a6a69ff The word dependent' has no a'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8030 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-21 22:14:26 +00:00
Misha Brukman
5560c9d49c Spell `necessary' correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7944 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-18 14:43:39 +00:00
Brian Gaeke
bf3c4cfaad Factory methods for function passes now return type FunctionPass *. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7839 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-14 06:09:32 +00:00
Chris Lattner
aa9c1f13a1 Implement instcombine optimizations: 
(A <setcc1> B) logicalop (A <setcc2> B)  -> (A <setcc3> B) or true or false

Where setcc[123] is one of the 6 setcc instructions, and logicalop is one of: And, Or, Xor


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7828 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-13 20:16:26 +00:00
Chris Lattner
564a727969 Generalize some of the add tests to allow for reassociation to take place 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7825 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-13 19:01:45 +00:00
Chris Lattner
fb5be090f5 Assign arguments different ranks so they get grouped together 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7813 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-13 16:16:26 +00:00
Chris Lattner
3ccd17ea2a Implement InstCombine/2003-08-12-AllocaNonNull.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7807 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-13 05:38:46 +00:00
Chris Lattner
934754bed6 Do not cannonicalize (X != 0) into (cast X to bool) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7806 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-13 05:33:12 +00:00
Chris Lattner
e92d2f450a Change cannonicalization rules: add X,X is represented as multiplies, multiplies 
of a power of two are represented as a shift.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7803 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-13 04:18:28 +00:00
Chris Lattner
df17af1dc7 Allow pulling logical operations through shifts. 
This implements InstCombine/shift.ll:test14*


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7793 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-12 21:53:41 +00:00
Chris Lattner
e9608e37fc Fix bug: Reassociate/2003-08-12-InfiniteLoop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7792 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-12 21:45:24 +00:00
Chris Lattner
6007cb6c4d Assign finer grained ranks, make sure to reassociate top-level after reassociating bottom level 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7787 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-12 20:14:27 +00:00
Chris Lattner
e132d95b62 Simplify code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7783 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-12 19:17:27 +00:00
Chris Lattner
67ca768927 Implement testcases InstCombine/or.ll:test16/test17 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7782 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-12 19:11:07 +00:00
Tanya Lattner
11a49a722f Fixed minor bug in SafeToHoist and made some changes suggested by Chris. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7614 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-05 20:39:02 +00:00
Tanya Lattner
9966c03aad Fixed LICM bug that hoists trapping instructions that are not guaranteed to execute. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7612 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-05 18:45:46 +00:00
Chris Lattner
6806f5614d DEBUG got moved to Support/Debug.h 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7492 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-01 22:15:03 +00:00
Chris Lattner
943c713c65 Instcombine: (A >> c1) << c2 for signed integers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7295 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-24 18:38:56 +00:00
Chris Lattner
08fd7abb42 Reorganization of code, no functional changes. 
Now it shoudl be a bit more efficient


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7292 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-24 17:52:58 +00:00
Chris Lattner
24c8e38455 Allow folding several instructions into casts, which can simplify a lot 
of codes.  For example,
short kernel (short t1) {
  t1 >>= 8; t1 <<= 8;
  return t1;
}

became:

short %kernel(short %t1.1) {
        %tmp.3 = shr short %t1.1, ubyte 8               ; <short> [#uses=1]
        %tmp.5 = cast short %tmp.3 to int               ; <int> [#uses=1]
        %tmp.7 = shl int %tmp.5, ubyte 8                ; <int> [#uses=1]
        %tmp.8 = cast int %tmp.7 to short               ; <short> [#uses=1]
        ret short %tmp.8
}

before, now it becomes:
short %kernel(short %t1.1) {
        %tmp.3 = shr short %t1.1, ubyte 8               ; <short> [#uses=1]
        %tmp.8 = shl short %tmp.3, ubyte 8              ; <short> [#uses=1]
        ret short %tmp.8
}

which will become:
short %kernel(short %t1.1) {
        %tmp.3 = and short %t1.1, 0xFF00
        ret short %tmp.3
}

This implements cast-set.ll:test4 and test5


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7290 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-24 17:35:25 +00:00
Chris Lattner
2cd9196e87 Add comments 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7283 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 21:41:57 +00:00
Chris Lattner
eca0c5c379 Remove explicit check for: not (not X) = X, it is already handled because xor is commutative 
- InstCombine: (X & C1) ^ C2 --> (X & C1) | C2 iff (C1&C2) == 0
  - InstCombine: (X | C1) ^ C2 --> (X | C1) & ~C2 iff (C1&C2) == C2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7282 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 21:37:07 +00:00
Chris Lattner
06782f804f InstCombine: (X ^ C1) & C2 --> (X & C2) iff (C1&C2) == 0 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7272 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 19:36:21 +00:00
Chris Lattner
5840326ae6 - InstCombine: (X | C1) & C2 --> X & C2 iff C1 & C1 == 0 
- InstCombine: (X | C) & C --> C
  - InstCombine: (X | C1) & C2 --> (X | (C1&C2)) & C2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7269 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 19:25:52 +00:00
Chris Lattner
ad44ebfff0 IC: (X & C1) | C2 --> (X | C2) & (C1|C2) 
IC: (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)

We are now guaranteed that all 'or's will be inside of 'and's, and all 'and's
will be inside of 'xor's, if the second operands are constants.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7264 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 18:29:44 +00:00
Chris Lattner
c6a8aff3f6 IC: (X ^ C1) & C2 --> (X & C2) ^ (C1&C2) 
Minor code cleanup


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7262 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 17:57:01 +00:00
Chris Lattner
00b1a7e23e InstCombine: (X ^ 4) == 8 --> X == 12 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7260 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 17:26:36 +00:00
Chris Lattner
bc5d414823 IC: (X & 5) == 13 --> false 
IC: (X | 8) == 4  --> false


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7257 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 17:02:11 +00:00
Chris Lattner
c07736a397 Simplify code by using ConstantInt::getRawValue instead of checking to see 
whether the constant is signed or unsigned, then casting


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7252 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 15:22:26 +00:00
Chris Lattner
00f185fbfd Fix bug: TailDup/2003-07-22-InfiniteLoop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7243 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-23 03:32:41 +00:00
Chris Lattner
1ba5bcd1ae - InstCombine (cast (xor A, B) to bool) ==> (setne A, B) 
- InstCombine (cast (and X, (1 << size(X)-1)) to bool) ==> x < 0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7241 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-22 21:46:59 +00:00
John Criswell
067947380c Added code that checks to see if a global variable is external before replacing 
a load of the global variable with the variable's constant value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7216 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-21 19:42:57 +00:00
John Criswell
a676b78791 Dinakar and I fixed a bug where we were trying to get the initializer of 
an external constant.  Since external constants don't have initializers, we
were failing on an assert() call in llvm/GlobalVariable.h.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7193 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-07-17 19:06:55 +00:00
Chris Lattner
833b8a4181 Add support for elimination of load instruction from global constants 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6912 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-26 05:06:25 +00:00
Chris Lattner
0af1fab019 Instcombine: X * -1 -> -X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6904 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-25 17:09:20 +00:00
Chris Lattner
837e42ccef Fix bug: ADCE/2003-06-24-BadSuccessor.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6891 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-24 23:02:45 +00:00
Chris Lattner
99c91e021a Do not mark ALL terminators live if any instruciton in the block is live. We only 
want to mark it live if it is an unconditional branch.  This fixes bug:
ADCE/2002-05-28-Crash.ll and makes this pass _much_ more useful.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6887 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-24 21:49:45 +00:00
Chris Lattner
38b5ae4b48 Fix bug: SCCP/2003-06-24-OverdefinedPHIValue.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6883 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-24 20:29:52 +00:00
Chris Lattner
fcd74e2e31 Fix bug: TailDup/2003-06-24-Simpleloop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6881 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-24 19:48:06 +00:00
Chris Lattner
79d35b3f8b Implement new transforms: 
Replace (cast (sub A, B) to bool) -> (setne A, B)
  Replace (cast (add A, B) to bool) -> (setne A, -B)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6873 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-23 21:59:52 +00:00
Chris Lattner
066ab6ac80 Add paranoia checking 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6856 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-22 20:46:00 +00:00
Chris Lattner
ea635cd072 Test change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6852 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-22 20:25:27 +00:00
Chris Lattner
7a7bef4355 Initial checkin of Tail duplication pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6846 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-22 20:10:28 +00:00
Chris Lattner
797249bc13 Instcombine cast (getelementptr Ptr, 0, 0, 0) to ... into: cast Ptr to ... 
This fixes type safety problems in a variety of benchmarks that were confusing
DSA.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6837 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-21 23:12:02 +00:00
Chris Lattner
9fe3886678 Implement the functionality of InstCombine/call.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6783 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-19 17:00:31 +00:00
Chris Lattner
bea68b3021 Don't corrupt memory when removing an instruction from the program, but 
not the worklist


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6733 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-17 03:57:18 +00:00
Chris Lattner
34e353e560 Fix bug: ADCE/2003-06-11-InvalidCFG.ll 
This was because we were deleting large chunks of functions without an exit block, because the post-dominance
information was not useful.  This broke crafty and twolf.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6698 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-16 12:10:45 +00:00
Chris Lattner
9b5fd22bd9 Fix bug: InstCombine/2003-06-05-BranchInvertInfLoop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6630 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-05 20:12:51 +00:00
Chris Lattner
40f5d70db4 Clean up previous code. 
Add new combination to turn seteq X, 0 -> not(cast X to bool)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6604 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-04 05:10:11 +00:00
Chris Lattner
c4d10ebcd7 Implement combination of boolean not with branch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6599 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-04 04:46:00 +00:00
Chris Lattner
074d84c746 Implement xform: (X != 0) -> (bool)X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6506 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-01 03:35:25 +00:00
Chris Lattner
b37923f9a1 Okay totally give up on trying to optimize aggregates that cannot be completely 
broken up into their elements.  Too many programs break because of this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6440 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 19:22:14 +00:00
Chris Lattner
26d2ca1d13 add a check that allows the SRoA pass to avoid breaking programs, even if their 
behavior is technically undefined


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6438 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 18:09:57 +00:00
Chris Lattner
261d686737 Fix bug: ScalarRepl/2003-05-30-MultiLevel.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6428 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 05:26:30 +00:00
Chris Lattner
5e062a1eda Fix bug: ScalarRepl/2003-05-29-ArrayFail.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6425 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 04:15:41 +00:00
Chris Lattner
faf4cc2da0 Add comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6415 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-29 20:26:30 +00:00
Chris Lattner
2a9c847f25 Fix bug: Instcombine/2003-05-27-ConstExprCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6352 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-27 16:40:51 +00:00
Chris Lattner
d10376bee5 * Actually USE the statistic that we made 
* Implement SRoA for arrays


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6349 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-27 16:09:27 +00:00
Chris Lattner
ed7b41ea90 Implementation of the simple "scalar replacement of aggregates" transformation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6346 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-27 15:45:27 +00:00
Chris Lattner
bd4ecf769d Fix bug: InstCombine/2003-05-26-CastMiscompile.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6338 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-26 23:41:32 +00:00
Chris Lattner
de579f11ff Remove using declarations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6306 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-22 22:00:07 +00:00
Chris Lattner
c54e2b8f84 Minor cleanups. 
This hunk:
-    } else if (Src->getNumOperands() == 2 && Src->use_size() == 1) {
+    } else if (Src->getNumOperands() == 2) {

Allows GEP folding to be more aggressive, which reduces the number of instructions
and can dramatically speed up BasicAA in some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6286 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-22 19:07:21 +00:00
Misha Brukman
82c89b9f3a Hopefully, the final fix for `[Pp]ropogate'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6251 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-20 21:01:22 +00:00
Misha Brukman
f117cc9ee6 s/convertable/convertible/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6248 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-20 18:45:36 +00:00
Chris Lattner
1d16ec7381 Handle va_arg instruction correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6030 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-08 02:50:13 +00:00
Chris Lattner
e96fda3002 Fix spelling 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5983 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-02 19:26:34 +00:00
Chris Lattner
3f2ec3925f Fix another case where constexprs could cause a crash 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5972 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-30 22:34:06 +00:00
Chris Lattner
fe32e0c578 Fix constant folding of constexprs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5971 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-30 22:19:10 +00:00
Chris Lattner
619f825640 Fix bug: ADCE/2003-04-25-PHIPostDominateProblem.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5952 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-25 22:53:27 +00:00
Chris Lattner
bceb2b0061 Fix major problem with PHI node traversal: rechecking PHIs should go into 
the visit function.  The worklist is for when their lattice value changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5927 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-25 03:35:10 +00:00
Chris Lattner
9de28289f8 Minor non-functional changes: 
* Spell propagate right
  * Improve performance of phi node handling
  * Delete using directive
  * Other minor changes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5920 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-25 02:50:03 +00:00
Chris Lattner
e408e25132 Remove unnecesary &*'s 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5872 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-23 16:37:45 +00:00
Chris Lattner
fb242b6edc Change the interface to constant expressions to allow automatic folding 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5793 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-16 22:40:51 +00:00
Chris Lattner
e941291a7a Initial checkin of PRE on LLVM. This implementation is still lacking in 
several ways:

 * Load expressions are not PRE'd well.  Alias Analysis should be used to
   get accurate information when computing anticipatibility.
 * The expression collection implementation does not handle PHI nodes properly,
   thus the implementation misses many opportunities to PRE.
 * This code could be sped up quite a bit

Despite these flaws, the code seems to work well, and handles PR's as one
would expect.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5759 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-31 19:55:43 +00:00
Chris Lattner
c277eaa41e Move BreakCriticalEdges pass to lib/Transforms/Utils 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5754 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-21 21:43:19 +00:00
Chris Lattner
c8802d2c16 Add the following instcombine xforms: 
- Implement simple reassociation: (A|c1)|(B|c2) == (A|B)|(c1|c2)
  - (A & C1)+(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
  - (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5743 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-11 00:12:48 +00:00
Chris Lattner
a4f445b28c Implement: -A*-B == A*B 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5740 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 23:23:04 +00:00
Chris Lattner
a27231acc0 Add new transformation: // (~A | ~B) == (~(A & B)) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5738 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 23:13:59 +00:00
Chris Lattner
8d96964e29 Generalize not and neg comparison testers to allow constant to be considered not'able and neg'able. This 
allows optimization of this:
int %test4(int %A, int %B) {
        %a = xor int %A, -1
        %c = and int %a, 5    ; 5 = ~c2
        %d = xor int %c, -1
        ret int %d
}

into this:
int %test4(int %A, int %B) {            ; No predecessors!
        %c.demorgan = or int %A, -6             ; <int> [#uses=1]
        ret int %c.demorgan
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5736 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 23:06:50 +00:00
Chris Lattner
4f98c56936 Generalize (A+c1)+c2 optimization to work with all associative operators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5733 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 21:43:22 +00:00
Chris Lattner
28ba1aad99 Minor change, no functionality diff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5731 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 19:20:30 +00:00
Chris Lattner
ea34005404 Fix bug: (x << 100) wasn't folded to 0, but (x >> 100) was (when x is unsigned) 
Implement new shift optimizations for shifting the result of a shift.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5729 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 19:16:08 +00:00
Chris Lattner
cb40a3749a Implement: (A|B)^B == A & (~B) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5728 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 18:24:17 +00:00
Chris Lattner
decd0812ec Implement %test7 in InstCombine/getelementptr.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5704 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-05 22:33:14 +00:00
Chris Lattner
0252e49f6d Convert LICM over to use AliasSetTracker. Besides being nicer, this automatically 
allows LICM to use access sizes to help alias analysis be more precise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5693 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-03 23:32:45 +00:00
Chris Lattner
fb743a937f Change the mem2reg interface to accept a TargetData argument 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5685 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-03 17:25:18 +00:00
Chris Lattner
caadc93f7b Fix bug: LICM/2003-02-28-PromoteDifferentType.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5675 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-28 19:21:40 +00:00
Chris Lattner
8601a9bf54 Fix bug: 2003-02-27-StoreSinkPHIs.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5658 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-27 21:59:36 +00:00
Chris Lattner
2d0a4a4eb8 Convert to work with new AliasAnalysis interface by conservatively assuming all pointers are arbitrarily large accesses 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5636 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-26 19:28:57 +00:00
Chris Lattner
f0a93ed9c5 Rename Instruction::hasSideEffects() -> mayWriteToMemory() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5620 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-24 20:48:32 +00:00
Chris Lattner
2e6e741b73 Initial implementation of Loop invariant memory->scalar promotion 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5613 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-24 03:52:32 +00:00
Chris Lattner
ad3448c917 4 new transformations: 
* X*C + X --> X * (C+1)
  * X + X*C --> X * (C+1)
  * X - X*C --> X * (1-C)
  * X*C - X --> X * (C-1)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5592 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-18 19:57:07 +00:00
Chris Lattner
a2881961b9 Add a variety of new transformations: 
* A & ~A == 0
  * A / (2^c) == A >> c  if unsigned
  * 0 / A == 0
  * 1.0 * A == A
  * A * (2^c) == A << c
  * A ^ ~A == -1
  * A | ~A == -1
  * 0 % X = 0
  * A % (2^c) == A & (c-1) if unsigned
  * A - (A & B) == A & ~B
  * -1 - A == ~A


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5587 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-18 19:28:33 +00:00
Chris Lattner
bac74584f1 Fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5458 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-01 04:50:59 +00:00
Chris Lattner
d7f268d418 Fix bug: ADCE/2003-01-22-PredecessorProblem.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5405 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-01-23 02:12:18 +00:00
Chris Lattner
4d0a82da2d Fix a huge performance problem in reassociate by introducing a 
rank map cache for instruction ranks


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5030 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 03:56:00 +00:00
Chris Lattner
680f0c283d Minor changes: 
* Reword comment to make more clear
  * Don't print out BB's after modification made
  * Don't delete and new an instruction when we need to move something, just move it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5029 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 03:49:50 +00:00
Chris Lattner
342d1826fb Remove dead code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4952 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-07 18:42:13 +00:00
Chris Lattner
c736d56562 Fix bug: 2002-12-05-MissedConstProp.ll pointed out by Casey Carter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4935 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-05 22:41:53 +00:00
Chris Lattner
6e6026b465 - Eliminated the deferred symbol table stuff in Module & Function, it really 
wasn't an optimization and it was causing lots of bugs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4779 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-11-20 18:36:02 +00:00
Chris Lattner
0006bd7520 Fix warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4649 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-11-09 00:49:43 +00:00
Chris Lattner
51c20e9a3a Fix spelling error 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4645 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-11-08 23:18:37 +00:00
Chris Lattner
0188534cd1 Instcombine this away: 
%A = getelementptr [4 x int]* %M, long 0, long 0
        %B = getelementptr int* %A, long 2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4536 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-11-04 16:43:32 +00:00
Chris Lattner
0864acf07b Add a transformation to turn: 
malloc Ty, C
int
  malloc [C x Ty], 1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4534 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-11-04 16:18:53 +00:00
Chris Lattner
af663465d6 Make sure to _delete_ memory allocated by worklists 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4523 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-11-04 02:54:22 +00:00
Chris Lattner
e4b730441d Fixes to the reassociate pass to make it respect dominance properties 
Huge thanks go to Casey Carter for writing this fix, reassociate is now
reoperational!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4471 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-31 17:12:59 +00:00
Chris Lattner
6918c079a1 BreakCriticalEdges should update dominance frontier information as well as 
other dominance stuff.  Patch contributed by Casey Carter


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4457 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-31 02:44:36 +00:00
Misha Brukman
a3bbcb5b66 Fix spelling of `propagate'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4423 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-29 23:06:16 +00:00
Chris Lattner
cb2610ea03 - Rename AnalysisUsage::preservesAll to getPreservesAll & preservesCFG to 
setPreservesCFG to be less confusing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4255 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-21 20:00:28 +00:00
Chris Lattner
d3d06a5cd8 - Fix bug: cee/2002-10-07-NoImmediateDominator.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4081 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-08 21:53:51 +00:00
Chris Lattner
f7f009d9a5 - Checkin LARGE number of Changes to CEE pass that will make it much more 
powerful, but that are largely disabled.  The basic idea here is that it
    is trying to forward branches across basic blocks that have PHI nodes in
    it, which are crucial to be able to handle cases like whet.ll.
    Unfortunately we are not updating SSA correctly, causing sim.c to die, and I
    don't have time to fix the regression now, so I must disable the
    functionality.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4077 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-08 21:34:15 +00:00
Chris Lattner
e802a023d9 Expose isCriticalEdge & SplitCriticalEdge methods from crit-edges pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4075 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-08 21:06:27 +00:00
Chris Lattner
57b314cfb1 It is illegal for PHI nodes to have zero values, delete the code to handle them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4071 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-08 17:07:39 +00:00
Chris Lattner
6eaeb5764c Fold ashr -1, X into -1 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4070 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-08 16:16:40 +00:00
Chris Lattner
a92f696b74 Updates to work with recent Statistic's changes: 
* Renamed StatisticReporter.h/cpp to Statistic.h/cpp
    * Broke constructor to take two const char * arguments instead of one, so
      that indendation can be taken care of automatically.
    * Sort the list by pass name when printing
    * Make sure to print all statistics as a group, instead of randomly when
      the statistics dtors are called.
    * Updated ProgrammersManual with new semantics.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4002 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-10-01 22:38:41 +00:00
Chris Lattner
b461373fbc Fix bug in LICM that caused the previous big win. :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3980 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-29 22:26:07 +00:00
Chris Lattner
952eaee239 Hoist the contents of Loops in depth first order in the dominator tree, 
rather than in random order.  This causes LICM to be DRAMATICALLY more
effective. For example, on bzip2.c, it is able to hoist 302 loads and
2380 total instructions, as opposed to 44/338 before.  This  obviously
makes other transformations much more powerful as well!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3978 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-29 21:46:09 +00:00
Chris Lattner
99a57216a9 - Further cleanups of LICM pass, remove extra work from previous implementation 
- Do not clone instructions then insert clone outside of loop.  Just move them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3951 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-26 19:40:25 +00:00
Chris Lattner
94170596b7 Improve comments, doxygenize more 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3950 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-26 16:52:07 +00:00
Chris Lattner
9646e6b6af Clean up LICM significantly now that it is guaranteed to have loop preheaders 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3947 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-26 16:38:03 +00:00
Chris Lattner
eb53ae4f2d Loop invariant code motion now depends on the LoopPreheader pass. Dead code 
has not yet been removed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3945 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-26 16:19:31 +00:00
Chris Lattner
c178d9459a - Cleanup break-crit-edges pass by making SplitCriticalEdge a member method. 
- break-crit-edges pass does not invalidate loop-preheader pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3944 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-26 16:18:51 +00:00
Chris Lattner
2ada19ea04 Eliminate extraneous #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3916 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-24 21:18:40 +00:00
Chris Lattner
eb0456c8fd - Do not expose Critical Edge breaking mechanics outside the BCE pass, thus 
removing it from Transforms/Local.h and from Transforms/Utils/*


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3910 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-24 15:51:56 +00:00
Chris Lattner
16e7a5295f Correlated Exprs pass now requires BCE pass instead of doing it manually 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3908 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-24 15:43:56 +00:00
Chris Lattner
6de302bbdb - Expose passinfo from BreakCriticalEdges pass so that it may be "Required" 
by other passes.  Make BCE pass be in anonymous namespace now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3907 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-24 15:43:12 +00:00
Chris Lattner
d76efa0186 Add new BreakCriticalEdges pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3903 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-24 00:08:39 +00:00
Chris Lattner
d06451f920 Optimize away cases like: 
%cast109 = cast uint %cast212 to short          ; <short> [#uses=1]
        %cast214 = cast short %cast109 to uint          ; <uint> [#uses=1]
        %cast215 = cast uint %cast214 to short          ; <short> [#uses=1]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3897 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-23 23:39:43 +00:00
Chris Lattner
c017d9132a * Fix bug: CorrelatedExprs/2002-09-23-PHIUpdateBug.ll 
* Make sure "Changed" is updated correctly


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3891 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-23 20:06:22 +00:00
Chris Lattner
dfcbf01222 Fix bug: test/Regression/Transforms/InstCombine/2002-09-17-GetElementPtrCrash.ll 
Thanks to Casey for finding it!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3783 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-17 21:05:42 +00:00
Vikram S. Adve
c7a6d24cef Extract most of the transformation into an externally accessible 
function -- DecomposeArrayRef(GetElementPtrInst* GEP) -- that can
be invoked on a single instruction at a time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3755 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-16 16:40:07 +00:00
Misha Brukman
655fb5c817 Function.h is unnecessary when Module.h is included. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3716 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-14 03:04:02 +00:00
Chris Lattner
3cac88ac9e - Change getelementptr instruction to use long indexes instead of uint 
indexes for sequential types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3682 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-11 01:21:33 +00:00
Chris Lattner
9e6161cfd1 Fix the last of the silly bugs I just introduced. :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3674 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-10 23:46:10 +00:00
Chris Lattner
f283608f2e Add cannonicalization of shl X, 1 -> add X, X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3671 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-10 23:04:09 +00:00
Chris Lattner
1d608abbc0 Clean up code due to auto-insert constructors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3665 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-10 22:38:47 +00:00
Chris Lattner
2a7c23ef91 Simplify code (somtimes dramatically), by using the new "auto-insert" feature 
of instruction constructors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3656 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-10 17:04:02 +00:00
Chris Lattner
5e76140536 * Clean up code a little bit 
* Fix bug: test/Regression/Transforms/IndVarsSimplify/2002-09-09-PointerIndVar.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3644 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-10 05:24:05 +00:00
Chris Lattner
1b9029c2f2 Hack unneccesary now that shifts of pointers are no longer legal! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3640 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-10 03:50:54 +00:00
Chris Lattner
e30e1cf029 Fix Bug: test/Regression/Transforms/InstCombine/2002-09-08-PointerShiftBug.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3626 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-08 21:39:07 +00:00
Chris Lattner
bd78696719 Minor simplification 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3619 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-08 18:55:04 +00:00
Chris Lattner
b0dbd7fc5a Initial checkin of Correlated Expression Elimination Pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3599 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-06 18:41:55 +00:00
Chris Lattner
0c4e886dbf - Renamed Type::isIntegral() to Type::isInteger() 
- Added new method Type::isIntegral() that is the same as isInteger, but
    also accepts bool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3574 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-03 01:08:28 +00:00
Chris Lattner
62b14df410 Add constant prop & DIE to InstCombine, so it cleans up after itself 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3568 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-02 04:59:56 +00:00
Chris Lattner
2a88bb7065 - Implement SCCP of getelementptr instructions 
- Implement SCCP of globals into ConstantExprs hopefully opening new
   opportunities for more SCCP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3555 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-30 23:39:00 +00:00
Chris Lattner
2964f3624c Really minor cleanups 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3549 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-30 22:53:30 +00:00
Chris Lattner
14987f16b4 - GCSE now no longer counts instructions not removed (due to no common 
dominator as being removed)
  - GCSE now uses new Value #'ing interface, instead of dealing with AA itself
  - GCSE worklist implementation much simpler, class cleaned up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3533 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-30 20:22:29 +00:00
Chris Lattner
e6f9a91618 - instcombine demorgan's law: and (not A), (not B) == not (or A, B) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3495 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-23 18:32:43 +00:00
Chris Lattner
cc63f1c674 Eliminated the MemAccessInst class, folding contents into GEP class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3487 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 23:37:20 +00:00
Chris Lattner
24ea74eb9a Load & StoreInst no longer derive from MemAccessInst, so we don't have 
to handle indexing anymore


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3485 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 22:49:05 +00:00
Chris Lattner
f5e84aa088 Add capability of using pointer analysis to LICM 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3478 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 21:39:55 +00:00
Chris Lattner
0712d55512 Remove long obsolete comments 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3476 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 21:25:54 +00:00
Chris Lattner
c20e24524f Instcombine PHI's of the form %PN = phi PN, X into X and 
%PN = phi PN, PN, PN into 0 (because the phi must not be reachable)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3470 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 20:22:01 +00:00