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1841 Commits

Author SHA1 Message Date
Chris Lattner
bf70b838e7 Fix bug: InstCombine/2005-05-07-UDivSelectCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21152 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-08 04:03:26 +00:00
Chris Lattner
7edc8c223e Implement the following xforms: 
(X-Y)-X --> -Y
A + (B - A) --> B
(B - A) + A --> B


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21138 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 17:14:51 +00:00
Chris Lattner
08954a26e4 Implement InstCombine/add.ll:test28, transforming C1-(X+C2) --> (C1-C2)-X. 
This occurs several dozen times in specint2k, particularly in crafty and gcc
apparently.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21136 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 16:28:01 +00:00
Chris Lattner
43d84d6b71 Transform X-(X+Y) == -Y and X-(Y+X) == -Y 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21134 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 16:15:25 +00:00
Chris Lattner
b1515fe522 disable this transformation in the one obscure case that really pessimizes 
pointer analysis.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20916 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-29 06:37:47 +00:00
Alkis Evlogimenos
ab7ada3ed6 Rename createPromoteMemoryToRegister() to 
createPromoteMemoryToRegisterPass() to be consistent with other pass
creation functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20885 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-28 02:01:12 +00:00
Chris Lattner
cec5b8831d Enhance loopsimplify to preserve alias analysis instead of clobbering it. 
This prevents crashes on some programs when using -ds-aa -licm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20831 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-25 06:37:22 +00:00
Chris Lattner
70ac2dcb84 Fix a bug where LICM was not updating AA information properly when sinking 
a pointer value out of a loop causing it to be duplicated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20828 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-25 00:22:36 +00:00
Chris Lattner
1f309c1a4e enable -debug-only=licm 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20788 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-23 21:00:12 +00:00
Chris Lattner
5b3a4553c1 Fix the missing symbols problem Bill was hitting. Patch contributed by 
Bill Wendling!!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20649 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-17 15:38:16 +00:00
Chris Lattner
feb1550824 stop using method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20603 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-15 05:19:49 +00:00
Chris Lattner
e4d5c441e0 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!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20597 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-15 04:54:21 +00:00
Chris Lattner
2f62fdc9a7 fix a bug where we thought arguments were constants :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20506 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-06 22:52:29 +00:00
Chris Lattner
3f93197098 Fix Regression/Transforms/LoopStrengthReduce/dont_insert_redundant_ops.ll, 
hopefully not breaking too many other things.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20505 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-06 22:36:12 +00:00
Chris Lattner
2f9b19b4c9 implement Transforms/LoopStrengthReduce/invariant_value_first_arg.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20501 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-06 22:06:22 +00:00
Chris Lattner
2461dff070 minor simplifications of the code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20497 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-06 21:58:22 +00:00
Chris Lattner
fee3411379 trivial simplification 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20494 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-06 21:35:38 +00:00
Chris Lattner
decc86db0c Fix a bug where we could corrupt a parent loop's header info if we unrolled 
a nested loop.  This fixes Transforms/LoopUnroll/2005-03-06-BadLoopInfoUpdate.ll
and PR532


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20493 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-06 20:57:32 +00:00
Chris Lattner
82aa566795 Make this MUCH faster by avoiding a linear search in the symbol table code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20479 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-06 05:42:36 +00:00
Jeff Cohen
e43dd1b8e7 Reformat comments to fix 80 columns. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20467 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-05 22:45:40 +00:00
Jeff Cohen
b21bf9a8d5 Reuse induction variables created for strength-reduced GEPs by other similar GEPs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20466 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-05 22:40:34 +00:00
Chris Lattner
7acff25f7f second argument to Value::setName is now gone. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20463 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-05 19:05:20 +00:00
Chris Lattner
8b9081081b Do not compute 1ULL << 64, which is undefined. This fixes Ptrdist/ks on the 
sparc, and testcase Regression/Transforms/InstCombine/2005-03-04-ShiftOverflow.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20445 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-04 23:21:33 +00:00
Jeff Cohen
2f3c9b7562 Add support for not strength reducing GEPs where the element size is a small 
power of two.  This emphatically includes the zeroeth power of two.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20429 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-04 04:04:26 +00:00
Chris Lattner
5f792c2c53 Add an optional argument to lower to a specific constant value instead of 
to a "sizeof" expression.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20414 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-03 01:03:43 +00:00
Jeff Cohen
0456e4a079 Fixed the following LSR bugs: 
* Loop invariant code does not dominate the loop header, but rather
    the end of the loop preheader.

  * The base for a reduced GEP isn't a constant unless all of its
    operands (preceding the induction variable) are constant.

  * Allow induction variable elimination for the simple case after all.

Also made changes recommended by Chris for properly deleting
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20383 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-01 03:46:11 +00:00
Jeff Cohen
14dc638081 Fix crash in LSR due to attempt to remove original induction variable. However, 
for reasons explained in the comments, I also deactivated this code as it needs
more thought.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20367 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-28 00:08:56 +00:00
Jeff Cohen
5e1e5e13ff PHI nodes were incorrectly placed when more than one GEP is reduced in a loop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20360 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-27 21:08:04 +00:00
Jeff Cohen
f465db6c6a First pass at improved Loop Strength Reduction. Still not yet ready for prime time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20358 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-27 19:37:07 +00:00
Chris Lattner
35c81b0b12 Teach globalopt how memset/cpy/move affect memory, to allow better optimization. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20352 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-27 18:58:52 +00:00
Chris Lattner
da895d6337 Fix spelling, patch contributed by Gabor Greif! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20343 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-27 06:18:25 +00:00
Chris Lattner
be54dcc8a9 remove extraneous cast 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20334 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-26 18:33:28 +00:00
Chris Lattner
623369ac56 Implement Transforms/SimplifyCFG/switch_thread.ll 
This does a simple form of "jump threading", which eliminates CFG edges that
are provably dead.  This triggers 90 times in the external tests, and
eliminating CFG edges is always always a good thing! :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20300 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-24 06:17:52 +00:00
Chris Lattner
1f21ef1511 make this more efficient. Scan up to 16 nodes, not the whole list. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20289 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-23 16:53:04 +00:00
Chris Lattner
cfa2f8eef4 Remove use of bind_obj 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20276 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-22 23:22:58 +00:00
Chris Lattner
1a84bd38ef Do not mark obviously unreachable blocks live when processing PHI nodes, 
and handle incomplete control dependences correctly.  This fixes:

Regression/Transforms/ADCE/dead-phi-edge.ll
  -> a missed optimization

Regression/Transforms/ADCE/dead-phi-edge.ll
  -> a compiler crash distilled from QT4


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20227 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-17 19:28:49 +00:00
Chris Lattner
8a7980b5ea Fix the second bug attached to PR504. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20181 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-14 20:11:45 +00:00
Chris Lattner
f6249261a9 Fix for testcase Transforms/IndVarsSimplify/2005-02-11-InvokeCrash.ll 
and PR504.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20129 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-12 03:26:49 +00:00
Alkis Evlogimenos
f64ea9d122 Localize globals if they are only used in main(). This replaces the 
global with an alloca, which eventually gets promoted into a
register. This enables a lot of other optimizations later on.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20109 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-10 18:36:30 +00:00
Alkis Evlogimenos
83874c9571 Fix crash on MallocInsts of unsized types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19988 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-02 04:43:37 +00:00
Chris Lattner
ac930048d6 API change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19959 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-01 01:23:49 +00:00
Chris Lattner
d514d8294d Adjust to changes in APIs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19958 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-01 01:23:31 +00:00
Chris Lattner
5a87447286 Hacks to make this ugly ugly code work with the new use lists. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19957 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-01 01:22:56 +00:00
Chris Lattner
fcfe33acda Implement InstCombine/cast.ll:test25, a case that occurs many times 
in spec


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19953 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-31 05:51:45 +00:00
Chris Lattner
2f503e6c27 Implement the trivial cases in InstCombine/store.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19950 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-31 05:36:43 +00:00
Chris Lattner
f9527850e6 Implement Transforms/InstCombine/cast-load-gep.ll, which allows us to devirtualize 
11 indirect calls in perlbmk.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19947 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-31 04:50:46 +00:00
Chris Lattner
5551706b0f Adjust to changes in instruction interfaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19900 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-29 00:39:08 +00:00
Chris Lattner
667fdaef9f Switchinst takes a hint for the number of cases it will have. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19899 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-29 00:38:45 +00:00
Chris Lattner
378805969e switchinst ctor now takes a hint for the number of cases that it will have. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19898 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-29 00:38:26 +00:00
Chris Lattner
5598aa0328 Adjust Valuehandle to hold its operand directly in it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19897 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-29 00:37:36 +00:00