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45 Commits

Author SHA1 Message Date
Chris Lattner
8ddc06469c Improve tail call elim to move loads above readonly calls 
when it allows forming a tail call.  Patch by Frits van
Bommel.  This implements PR4323.

llvm-svn: 73752
 2009-06-19 04:22:16 +00:00
Duncan Sands
880eaf5278 Allow readonly functions to unwind exceptions. Teach 
the optimizers about this.  For example, a readonly
function with no uses cannot be removed unless it is
also marked nounwind.

llvm-svn: 71071
 2009-05-06 06:49:50 +00:00
Dan Gohman
e1f9be27bc Tidy up several unbeseeming casts from pointer to intptr_t. 
llvm-svn: 55779
 2008-09-04 17:05:41 +00:00
Chris Lattner
f9d43c9853 Fix a case where tailcallelim wouldn't set the changed bit when it made a change. 
llvm-svn: 52267
 2008-06-14 00:49:48 +00:00
Gabor Greif
48ffb6c7dc Fix a bunch of 80col violations that arose from the Create API change. Tweak makefile targets to find these better. 
llvm-svn: 51143
 2008-05-15 10:04:30 +00:00
Dan Gohman
bab18cae46 Clean up the use of static and anonymous namespaces. This turned up 
several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017
 2008-05-13 00:00:25 +00:00
Gabor Greif
6c6b8a57f3 API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277
 2008-04-06 20:25:17 +00:00
Devang Patel
cb8f342ea8 Become multiple return value aware. 
Right now, the pass does not optimize tail recursions 
involving multiple return values.

llvm-svn: 48228
 2008-03-11 17:33:32 +00:00
Anton Korobeynikov
fd6b669c80 Make Transforms to be 4.3 warnings-clean 
llvm-svn: 47371
 2008-02-20 11:26:25 +00:00
Chris Lattner
ad9a6ccb83 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Chris Lattner
ab8aa7d61a Prevent tailcallelim from breaking "recursive" calls to builtins. 
llvm-svn: 41804
 2007-09-10 20:58:55 +00:00
Nick Lewycky
c2306ff5b4 Fix typo in comment. 
llvm-svn: 36873
 2007-05-06 13:37:16 +00:00
Devang Patel
cd45427a87 Drop 'const' 
llvm-svn: 36662
 2007-05-03 01:11:54 +00:00
Devang Patel
8ee9065162 Use 'static const char' instead of 'static const int'. 
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652
 2007-05-02 21:39:20 +00:00
Devang Patel
38a66bc82e Do not use typeinfo to identify pass in pass manager. 
llvm-svn: 36632
 2007-05-01 21:15:47 +00:00
Dan Gohman
d0a0ea9916 Change uses of Function::front to Function::getEntryBlock for readability. 
llvm-svn: 35265
 2007-03-22 16:38:57 +00:00
Chris Lattner
b131b3e07e Simplify code by using value::takename 
llvm-svn: 34176
 2007-02-11 01:23:03 +00:00
Reid Spencer
8749d297f5 Apply the VISIBILITY_HIDDEN field to the remaining anonymous classes in 
the Transforms library. This reduces debug library size by 132 KB, debug
binary size by 376 KB, and reduces link time for llvm tools slightly.

llvm-svn: 33939
 2007-02-05 23:32:05 +00:00
Chris Lattner
9e7640cf02 Switch over Transforms/Scalar to use the STATISTIC macro. For each statistic 
converted, we lose a static initializer.  This also allows GCC to emit warnings
about unused statistics.

llvm-svn: 32690
 2006-12-19 21:40:18 +00:00
Chris Lattner
a531ce882e Detemplatize the Statistic class. The only type it is instantiated with 
is 'unsigned'.

llvm-svn: 32279
 2006-12-06 17:46:33 +00:00
Reid Spencer
4bafa71dc1 For PR786: 
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.

llvm-svn: 31380
 2006-11-02 20:25:50 +00:00
Chris Lattner
51e762d4cb Add a workaround for PR962, disabling the more aggressive form of this 
transformation.  This speeds up a C++ app 2.25x.

llvm-svn: 31113
 2006-10-22 18:42:26 +00:00
Chris Lattner
a39dcb5377 eliminate RegisterOpt. It does the same thing as RegisterPass. 
llvm-svn: 29925
 2006-08-27 22:42:52 +00:00
Chris Lattner
0bd3e3230c Implement Transforms/TailCallElim/return-undef.ll, a trivial case 
that has been sitting in my inbox since May 18. :)

llvm-svn: 24194
 2005-11-05 08:21:11 +00:00
Chris Lattner
c6571e5c64 Use the new 'moveBefore' method to simplify some code. Really, which is 
easier to understand?  :)

llvm-svn: 22706
 2005-08-08 19:11:57 +00:00
Chris Lattner
427319ff4b Fix typoCVS: ---------------------------------------------------------------------- 
llvm-svn: 22692
 2005-08-07 07:00:52 +00:00
Chris Lattner
5b499da0a7 * Use the new PHINode::hasConstantValue method to simplify some code 
* Teach this code to move allocas out of the loop when tail call eliminating
  a call marked 'tail'.  This implements TailCallElim/move_alloca_for_tail_call.ll
* Do not perform this transformation if a call is marked 'tail' and if there
  are allocas that we cannot move out of the loop in #2.  Doing so would increase
  the stack usage of the function.  This implements fixes
  PR615 and TailCallElim/dont-tce-tail-marked-call.ll.

llvm-svn: 22690
 2005-08-07 04:27:41 +00:00
Jeff Cohen
bd51ec7461 Eliminate all remaining tabs and trailing spaces. 
llvm-svn: 22523
 2005-07-27 06:12:32 +00:00
Chris Lattner
f221558c21 If a function contains no allocas, all of the calls in it are trivially 
suitable for tail calls.

llvm-svn: 21836
 2005-05-09 23:51:13 +00:00
Misha Brukman
53e199440e Remove trailing whitespace 
llvm-svn: 21427
 2005-04-21 23:48:37 +00:00
Chris Lattner
4b688a1c70 This mega patch converts us from using Function::a{iterator|begin|end} to 
using Function::arg_{iterator|begin|end}.  Likewise Module::g* -> Module::global_*.

This patch is contributed by Gabor Greif, thanks!

llvm-svn: 20597
 2005-03-15 04:54:21 +00:00
Reid Spencer
c4abcbefb1 Changes For Bug 352 
Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.

llvm-svn: 16137
 2004-09-01 22:55:40 +00:00
Chris Lattner
68aef33986 Adjust to the new BasicBlock ctor, which requires a function parameter 
llvm-svn: 11114
 2004-02-04 03:58:28 +00:00
Chris Lattner
5fc36a496f 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
a62c29757d 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
647b7d8869 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
be2b3fb417 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
2b7309dd1c Minor cleanups and simplifications 
llvm-svn: 10127
 2003-11-21 16:52:05 +00:00
Chris Lattner
feeb3261f2 Start using the nicer terminator auto-insertion API 
llvm-svn: 10111
 2003-11-20 18:25:24 +00:00
Brian Gaeke
d25f86d683 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00
John Criswell
b402729b30 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
d4de2760aa Rename Function::getEntryNode -> getEntryBlock 
llvm-svn: 8625
 2003-09-20 14:39:18 +00:00
Chris Lattner
7bf15fccb9 Fix a really obvious huge gaping bug, add a comment 
llvm-svn: 8620
 2003-09-20 05:24:00 +00:00
Chris Lattner
bf7dd80e7c Expose the TCE pass 
llvm-svn: 8619
 2003-09-20 05:14:13 +00:00
Chris Lattner
70c9cbd5c6 New transformation: tail recursion elimination 
llvm-svn: 8618
 2003-09-20 05:03:31 +00:00