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565 Commits

Author SHA1 Message Date
Chris Lattner 14ab84a483 Fix PR223: Loopsimplify incorrectly updates dominator information 
The problem is that the dominator update code didn't "realize" that it's
possible for the newly inserted basic block to dominate anything.  Because
it IS possible, stuff was getting updated wrong.

llvm-svn: 11137
 2004-02-05 21:12:24 +00:00
Chris Lattner 8d414ad035 Adjust to the new BasicBlock ctor, which requires a function parameter 
llvm-svn: 11114
 2004-02-04 03:58:28 +00:00
Chris Lattner c2f0aa58df Disable (x - (y - z)) => (x + (z - y)) optimization for floating point. 
llvm-svn: 11083
 2004-02-02 20:09:56 +00:00
Chris Lattner cacd30b957 Update comment 
llvm-svn: 11082
 2004-02-02 20:09:22 +00:00
Chris Lattner ed9b12c31a Disable tail duplication in any "hard" cases, where it might break SSA form. 
llvm-svn: 11052
 2004-02-01 06:32:28 +00:00
Chris Lattner 7c91a6176c Fix the count of the number of instructions removed 
llvm-svn: 11049
 2004-02-01 05:15:07 +00:00
Misha Brukman bf43787f33 Hyphenate `target-dependent' 
llvm-svn: 11003
 2004-01-28 20:43:01 +00:00
Chris Lattner 1f7942fe7d Fix InstCombine/2004-01-13-InstCombineInvokePHI.ll, which also fixes lots 
of C++ programs in Shootout-C++, including lists1 and moments, etc

llvm-svn: 10845
 2004-01-14 06:06:08 +00:00
Chris Lattner fcf21a75b0 Fix bug in previous checkin 
llvm-svn: 10798
 2004-01-12 19:47:05 +00:00
Chris Lattner c1e7cc0fbe Eliminate use of ConstantHandling and ConstantExpr::getShift interfaces 
llvm-svn: 10796
 2004-01-12 19:35:11 +00:00
Chris Lattner d7ccc9e5a5 Add header file I accidentally removed in teh shuffle 
llvm-svn: 10795
 2004-01-12 19:15:20 +00:00
Chris Lattner c9fb4a3b89 Remove use of the ConstantHandling interfaces 
llvm-svn: 10793
 2004-01-12 19:12:50 +00:00
Chris Lattner 1b7d4d7b63 Don't use ConstantExpr::getShift anymore 
llvm-svn: 10791
 2004-01-12 19:08:43 +00:00
Chris Lattner 118a76cb2f Remove unneeded #include 
llvm-svn: 10788
 2004-01-12 18:33:54 +00:00
Chris Lattner 0fe5b32c01 Use constantexprs for casts. Eliminate use of the ConstantHandling interfaces 
llvm-svn: 10779
 2004-01-12 17:43:40 +00:00
Chris Lattner fe992d4332 Fix fairly severe bug in my last checking where we treated all unfoldable 
constants as being "true" when evaluating branches.  This was introduced
because we now create constantexprs for the constants instead of failing the
fold.

llvm-svn: 10778
 2004-01-12 17:40:36 +00:00
Chris Lattner 49f74522ec * Implement minor performance optimization for the getelementptr case 
* Implement SCCP of load instructions, implementing Transforms/SCCP/loadtest.ll
  This allows us to fold expressions like "foo"[2], even if the pointer is only
  a conditional constant.

llvm-svn: 10767
 2004-01-12 04:29:41 +00:00
Chris Lattner 7e8af38637 Do not hack on volatile loads. I'm not sure what the point of a volatile load 
from constant memory is, but lets not take chances.

llvm-svn: 10765
 2004-01-12 04:13:56 +00:00
Chris Lattner 05fe6847a8 Implement SCCP/phitest.ll 
llvm-svn: 10763
 2004-01-12 03:57:30 +00:00
Chris Lattner 3bcecb92f3 Update obsolete comments 
Fix iterator invalidation problems which was causing -mstrip to miss some
entries, and read free'd memory.  This shrinks the symbol table of 254.gap
from 333 to 284 bytes!  :)

llvm-svn: 10751
 2004-01-10 21:36:49 +00:00
Chris Lattner 49525f8cf4 Finegrainify namespacification 
llvm-svn: 10725
 2004-01-09 06:02:20 +00:00
Chris Lattner 59d2d7fc33 Improve encapsulation in the Loop and LoopInfo classes by eliminating the 
getSubLoops/getTopLevelLoops methods, replacing them with iterator-based
accessors.

llvm-svn: 10714
 2004-01-08 00:09:44 +00:00
Chris Lattner 7e755e443f More minor non-functional changes. This now computes the exit condition, though 
it doesn't do anything with it.

llvm-svn: 10590
 2003-12-23 07:47:09 +00:00
Chris Lattner a02d5aa6ce Don't mind me, I'm just refactoring away. This patch makes room for LFTR, but 
contains no functionality changes.

llvm-svn: 10583
 2003-12-22 09:53:29 +00:00
Chris Lattner 6449dcefbc Implement IndVarsSimplify/pointer-indvars.ll, transforming pointer 
arithmetic into "array subscripts"

llvm-svn: 10580
 2003-12-22 05:02:01 +00:00
Chris Lattner d3678bc7c5 Fix PR194 
llvm-svn: 10573
 2003-12-22 03:58:44 +00:00
Chris Lattner fc7bdac1b3 Fix ADCE/2003-12-19-MergeReturn.llx 
llvm-svn: 10539
 2003-12-19 09:08:34 +00:00
Chris Lattner 918460190f Remove the wierd "Operands" loop, by traversing basicblocks in reverse order 
llvm-svn: 10536
 2003-12-19 08:18:16 +00:00
Chris Lattner 547192d688 Implement LICM/sink_multiple.ll, by sinking all possible instructions in the 
loop before hoisting any.

llvm-svn: 10534
 2003-12-19 07:22:45 +00:00
Chris Lattner 031a3f8cc7 Generalize a special case to fix PR187 
llvm-svn: 10531
 2003-12-19 06:27:08 +00:00
Chris Lattner 91daeb5431 Factor code out into the Utils library 
llvm-svn: 10530
 2003-12-19 05:58:40 +00:00
John Criswell b22e9b4b35 Reverted back to previous revision - this was previously merged 
according to the CVS log messages.

llvm-svn: 10517
 2003-12-18 17:19:19 +00:00
John Criswell 86a3a48697 Merged in RELEASE_11. 
llvm-svn: 10516
 2003-12-18 16:43:17 +00:00
Chris Lattner 9e2b42a0c8 When we delete instructions from the loop, make sure to remove them from the 
AliasSetTracker as well.

llvm-svn: 10507
 2003-12-18 08:12:32 +00:00
Chris Lattner 6c08bb8b8e Fix for PR185 & IndVarsSimplify/2003-12-15-Crash.llx 
llvm-svn: 10473
 2003-12-15 17:34:02 +00:00
Chris Lattner 884e824534 Refactor code just a little bit, allowing us to implement TailCallElim/return_constant.ll 
llvm-svn: 10467
 2003-12-14 23:57:39 +00:00
Chris Lattner d1c371c32c Do not promote volatile alias sets into registers 
llvm-svn: 10458
 2003-12-14 04:52:31 +00:00
Chris Lattner 34399dda2d Fix LICM/2003-12-11-SinkingToPHI.ll, and quite possibly all of the other known problems in the universe. 
llvm-svn: 10409
 2003-12-11 22:23:32 +00:00
Chris Lattner 6281fd3ead Fix bug: LICM/sink_multiple_exits.ll 
Thanks for pointing this out John  :)

llvm-svn: 10387
 2003-12-10 22:35:56 +00:00
Chris Lattner 55c2113b7b Don't allow dead instructions to stop sinking early. 
llvm-svn: 10386
 2003-12-10 20:43:29 +00:00
Chris Lattner 713907e2b8 Fix bug: IndVarsSimplify/2003-12-10-RemoveInstrCrash.llx 
llvm-svn: 10385
 2003-12-10 20:43:04 +00:00
Chris Lattner 7e5bd59da2 Finegrainify namespacification 
Fix bug: LowerInvoke/2003-12-10-Crash.llx

llvm-svn: 10382
 2003-12-10 20:22:42 +00:00
Chris Lattner ccd9f3c1f8 Finegrainify namespacification 
Reorder #includes
Implement: IndVarsSimplify/2003-12-10-IndVarDeadCode.ll

llvm-svn: 10376
 2003-12-10 18:06:47 +00:00
Chris Lattner 7710f2f49e Finegrainify namespacification 
Fix bug: LoopSimplify/2003-12-10-ExitBlocksProblem.ll

llvm-svn: 10373
 2003-12-10 17:20:35 +00:00
Chris Lattner 6364314a6e Simplify code 
llvm-svn: 10371
 2003-12-10 16:58:24 +00:00
Chris Lattner 48b4b852b4 Avoid performing two identical lookups when one will suffice 
llvm-svn: 10370
 2003-12-10 16:57:24 +00:00
Chris Lattner edda1af35a 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 
llvm-svn: 10369
 2003-12-10 15:56:24 +00:00
Chris Lattner aaaea51090 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

llvm-svn: 10358
 2003-12-10 06:41:05 +00:00
Chris Lattner 6c237bcdf2 Do not insert one entry PHI nodes in split exit blocks! 
llvm-svn: 10348
 2003-12-09 23:12:55 +00:00
Chris Lattner 65c1193d55 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

llvm-svn: 10342
 2003-12-09 19:32:44 +00:00
Chris Lattner c05176843e Fine grainify namespacification 
Code cleanups
Make LICM::SafeToHoist marginally more efficient

llvm-svn: 10341
 2003-12-09 17:18:00 +00:00
Chris Lattner 50663a1a78 Implement: TailCallElim/accum_recursion_constant_arg.ll 
Also make sure to clean up any PHI nodes that are inserted which are pointless.

llvm-svn: 10333
 2003-12-08 23:37:35 +00:00
Chris Lattner 198e620752 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.  :)

llvm-svn: 10332
 2003-12-08 23:19:26 +00:00
Chris Lattner a7b6f3ab9c 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.

llvm-svn: 10312
 2003-12-08 05:34:54 +00:00
Chris Lattner 8427bffb9a * Finegrainify namespacification 
* Transform: free <ty>* (cast <ty2>* X to <ty>*) into free <ty2>* X

llvm-svn: 10303
 2003-12-07 01:24:23 +00:00
Chris Lattner 40d2aeb28f Finegrainify namespacification 
Fix regressions ScalarRepl/basictest.ll & arraytest.ll

llvm-svn: 10287
 2003-12-02 17:43:55 +00:00
Chris Lattner 52310702a1 Do not use index type to determine what it is indexing into! 
llvm-svn: 10226
 2003-11-25 21:09:18 +00:00
Chris Lattner 4cc2cc5c58 Do not crash when deleing a region with a dead invoke instruction 
llvm-svn: 10161
 2003-11-22 02:13:08 +00:00
Chris Lattner 1ad805977d Finegrainify namespacification 
The module stripping pass should not strip symbols on external globals

llvm-svn: 10157
 2003-11-22 01:29:35 +00:00
Chris Lattner a29600046d Minor cleanups and simplifications 
llvm-svn: 10127
 2003-11-21 16:52:05 +00:00
Chris Lattner 2af517281d Start using the nicer terminator auto-insertion API 
llvm-svn: 10111
 2003-11-20 18:25:24 +00:00
Chris Lattner 841dd53555 Fix PR116 
llvm-svn: 10032
 2003-11-16 21:39:27 +00:00
Chris Lattner d76fe4ea7d Implement feature: InstCombine/2003-11-13-ConstExprCastCall.ll 
llvm-svn: 9981
 2003-11-13 19:17:02 +00:00
Brian Gaeke 960707c335 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00
Chris Lattner 4474336166 Adjust to new critical edge interface 
llvm-svn: 9853
 2003-11-10 04:10:50 +00:00
Misha Brukman ad03afcb34 Declare FunctionPasses as such so that they can be used in FunctionPassManager. 
llvm-svn: 9768
 2003-11-07 17:20:18 +00:00
Chris Lattner 7c94d1171a Fix flawed logic that was breaking several SPEC benchmarks, including gzip and crafty. 
llvm-svn: 9731
 2003-11-05 17:31:36 +00:00
Chris Lattner 8f2f598024 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)
llvm-svn: 9715
 2003-11-05 01:06:05 +00:00
Chris Lattner e580666532 Minor cleanup, plus implement InstCombine/xor.ll:test17 
llvm-svn: 9711
 2003-11-04 23:50:51 +00:00
Chris Lattner 0f68fa6569 Implement InstCombine/xor.ll:test(15|16) 
llvm-svn: 9708
 2003-11-04 23:37:10 +00:00
Chris Lattner 6444c37488 Implement InstCombine/cast-set.ll:test6[a]. This improves code generated for 
a hot function in em3d

llvm-svn: 9673
 2003-11-03 05:17:03 +00:00
Chris Lattner 1693079e92 Implement InstCombine/cast-set.ll: test1, test2, test7 
llvm-svn: 9670
 2003-11-03 04:25:02 +00:00
Chris Lattner af7893203b Fix bug with zero sized casts 
llvm-svn: 9667
 2003-11-03 01:29:41 +00:00
Chris Lattner d4d987dd4a Fix bug in previous checkin 
llvm-svn: 9656
 2003-11-02 06:54:48 +00:00
Chris Lattner f4ad165e8b Implement transmogriphication of allocation instructions 
llvm-svn: 9654
 2003-11-02 05:57:39 +00:00
Chris Lattner 686767f3f6 Fix bug: 2003-10-29-CallSiteResolve.ll & PR70 
llvm-svn: 9600
 2003-10-30 00:46:41 +00:00
Chris Lattner bcb0f4bf2e Fix PR66 & ScalarRepl/2003-10-29-ArrayProblem.ll 
llvm-svn: 9585
 2003-10-29 17:55:44 +00:00
John Criswell 4436c49787 Added LLVM copyright notice to Makefiles. 
llvm-svn: 9312
 2003-10-20 22:26:57 +00:00
John Criswell 482202a601 Added LLVM project notice to the top of every C++ source file. 
Header files will be on the way.

llvm-svn: 9298
 2003-10-20 19:43:21 +00:00
Chris Lattner b94550e537 Change the Opcode enum for PHI nodes from "Instruction::PHINode" to "Instruction::PHI" to be more consistent with the other instructions. 
llvm-svn: 9269
 2003-10-19 21:34:28 +00:00
Chris Lattner f0fc9be634 ADd support for the new varargs instructions 
llvm-svn: 9225
 2003-10-18 05:56:52 +00:00
Chris Lattner 50b6858e2e This code does not require random access use_lists 
llvm-svn: 9156
 2003-10-16 16:49:12 +00:00
Chris Lattner f95d9b99b3 Decrease usage of use_size() 
llvm-svn: 9135
 2003-10-15 16:48:29 +00:00
Chris Lattner 178957028b Wrap code at 80 columns 
llvm-svn: 9073
 2003-10-13 05:04:27 +00:00
Chris Lattner c4622a6955 Add support to the loop canonicalization pass to make it transform loops to 
have a SINGLE backedge.  This is useful to, for example, the -indvars pass.

This implements testcase LoopSimplify/single-backedge.ll and closes PR#34

llvm-svn: 9065
 2003-10-13 00:37:13 +00:00
Chris Lattner 72272a70b8 Rename loop preheaders pass to loop simplify 
llvm-svn: 9061
 2003-10-12 21:52:28 +00:00
Chris Lattner 55d4788397 File is renamed to LoopSimplify.cpp 
llvm-svn: 9059
 2003-10-12 21:44:18 +00:00
Chris Lattner 154e4d5dea First step in renaming the preheaders pass to loopsimplify 
llvm-svn: 9058
 2003-10-12 21:43:28 +00:00
Chris Lattner 9703c02ce4 The preheader insertion pass only depends on the CFG. Mark it as such, which 
allows GCCAS to only run it once.

llvm-svn: 9056
 2003-10-12 19:33:10 +00:00
Misha Brukman 8b2bd4ed47 Fix spelling. 
llvm-svn: 9027
 2003-10-10 17:57:28 +00:00
Chris Lattner 35e56e7372 Update comment 
llvm-svn: 8965
 2003-10-08 16:56:11 +00:00
Chris Lattner 0bbbe5d4c8 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

llvm-svn: 8964
 2003-10-08 16:55:34 +00:00
Chris Lattner 7324f7cd03 Minor fixes here and there 
llvm-svn: 8963
 2003-10-08 16:21:03 +00:00
Chris Lattner 71ac22ffb5 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.

llvm-svn: 8962
 2003-10-08 15:47:41 +00:00
Chris Lattner 950fc785ae whoops, don't accidentally lose variable names 
llvm-svn: 8955
 2003-10-07 22:58:41 +00:00
Chris Lattner 75b4d1deec Fix bug: InstCombine/cast.ll:test11 / PR#7 
llvm-svn: 8954
 2003-10-07 22:54:13 +00:00
Chris Lattner aec3d948cf Refactor code a bit 
llvm-svn: 8952
 2003-10-07 22:32:43 +00:00
Chris Lattner ed922162e1 Bill contributed this major rewrite of the -lowerswitch pass to make it generate 
logarithmic conditional branch sequences instead of linear sequences.  Thanks Bill!

llvm-svn: 8928
 2003-10-07 18:46:23 +00:00
Chris Lattner 800aaaf207 Fix bug in previous checkin 
llvm-svn: 8922
 2003-10-07 15:17:02 +00:00
Chris Lattner e8ed4ef039 Minor speedups for the instcombine pass 
llvm-svn: 8894
 2003-10-06 17:11:01 +00:00