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471 Commits

Author SHA1 Message Date
Chris Lattner
d6d41b5e23 Simplify code 
llvm-svn: 10371
 2003-12-10 16:58:24 +00:00
Chris Lattner
7eff699231 Avoid performing two identical lookups when one will suffice 
llvm-svn: 10370
 2003-12-10 16:57:24 +00:00
Chris Lattner
94944ee4aa 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
fe8fd04cce 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
c49a27b2b6 Do not insert one entry PHI nodes in split exit blocks! 
llvm-svn: 10348
 2003-12-09 23:12:55 +00:00
Chris Lattner
f5f65c4000 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
2ffca818b6 Fine grainify namespacification 
Code cleanups
Make LICM::SafeToHoist marginally more efficient

llvm-svn: 10341
 2003-12-09 17:18:00 +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
60dae0e7d9 * 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
0d57e06a37 Finegrainify namespacification 
Fix regressions ScalarRepl/basictest.ll & arraytest.ll

llvm-svn: 10287
 2003-12-02 17:43:55 +00:00
Chris Lattner
7b895914a2 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
a88e567e00 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
3b71386e30 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
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
Chris Lattner
04d122be8f Fix PR116 
llvm-svn: 10032
 2003-11-16 21:39:27 +00:00
Chris Lattner
fe4e3f7108 Implement feature: InstCombine/2003-11-13-ConstExprCastCall.ll 
llvm-svn: 9981
 2003-11-13 19:17:02 +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
Chris Lattner
e0d83d79e4 Adjust to new critical edge interface 
llvm-svn: 9853
 2003-11-10 04:10:50 +00:00
Misha Brukman
acc53cc7c6 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
9b9fdd0f17 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
fd8ec07a8e 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
ac2e4e15dd Minor cleanup, plus implement InstCombine/xor.ll:test17 
llvm-svn: 9711
 2003-11-04 23:50:51 +00:00
Chris Lattner
a309338bd4 Implement InstCombine/xor.ll:test(15|16) 
llvm-svn: 9708
 2003-11-04 23:37:10 +00:00
Chris Lattner
19a418db92 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
d8c97ff65d Implement InstCombine/cast-set.ll: test1, test2, test7 
llvm-svn: 9670
 2003-11-03 04:25:02 +00:00
Chris Lattner
01dd059e75 Fix bug with zero sized casts 
llvm-svn: 9667
 2003-11-03 01:29:41 +00:00
Chris Lattner
e005f61e9e Fix bug in previous checkin 
llvm-svn: 9656
 2003-11-02 06:54:48 +00:00
Chris Lattner
a06aa3d2f2 Implement transmogriphication of allocation instructions 
llvm-svn: 9654
 2003-11-02 05:57:39 +00:00
Chris Lattner
c8ea13f032 Fix bug: 2003-10-29-CallSiteResolve.ll & PR70 
llvm-svn: 9600
 2003-10-30 00:46:41 +00:00
Chris Lattner
cb21ea9a32 Fix PR66 & ScalarRepl/2003-10-29-ArrayProblem.ll 
llvm-svn: 9585
 2003-10-29 17:55:44 +00:00
John Criswell
71d2894956 Added LLVM copyright notice to Makefiles. 
llvm-svn: 9312
 2003-10-20 22:26:57 +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
87843f87b8 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
ae52a1b309 ADd support for the new varargs instructions 
llvm-svn: 9225
 2003-10-18 05:56:52 +00:00
Chris Lattner
f0da6e06e6 This code does not require random access use_lists 
llvm-svn: 9156
 2003-10-16 16:49:12 +00:00
Chris Lattner
f2ed60c0b7 Decrease usage of use_size() 
llvm-svn: 9135
 2003-10-15 16:48:29 +00:00
Chris Lattner
7a5241cc99 Wrap code at 80 columns 
llvm-svn: 9073
 2003-10-13 05:04:27 +00:00
Chris Lattner
7519b1216b 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
f4ca01758d Rename loop preheaders pass to loop simplify 
llvm-svn: 9061
 2003-10-12 21:52:28 +00:00
Chris Lattner
1c8a980870 File is renamed to LoopSimplify.cpp 
llvm-svn: 9059
 2003-10-12 21:44:18 +00:00
Chris Lattner
7fe9661cae First step in renaming the preheaders pass to loopsimplify 
llvm-svn: 9058
 2003-10-12 21:43:28 +00:00
Chris Lattner
510dfc942a 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
868eac95dd Fix spelling. 
llvm-svn: 9027
 2003-10-10 17:57:28 +00:00
Chris Lattner
bf95cc12a3 Update comment 
llvm-svn: 8965
 2003-10-08 16:56:11 +00:00
Chris Lattner
9cece85acb 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
251ff679ce Minor fixes here and there 
llvm-svn: 8963
 2003-10-08 16:21:03 +00:00
Chris Lattner
36960b263b 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