c7f3c1a00e
Implement InstCombine/add.ll:test28, transforming C1-(X+C2) --> (C1-C2)-X.
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This occurs several dozen times in specint2k, particularly in crafty and gcc
apparently.
llvm-svn: 21136
2005-04-07 16:28:01 +00:00
a9be4490d8
Transform X-(X+Y) == -Y and X-(Y+X) == -Y
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llvm-svn: 21134
2005-04-07 16:15:25 +00:00
ecfa9b5810
disable this transformation in the one obscure case that really pessimizes
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pointer analysis.
llvm-svn: 20916
2005-03-29 06:37:47 +00:00
9ead0d7b4c
Rename createPromoteMemoryToRegister() to
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createPromoteMemoryToRegisterPass() to be consistent with other pass
creation functions.
llvm-svn: 20885
2005-03-28 02:01:12 +00:00
514e843e89
Enhance loopsimplify to preserve alias analysis instead of clobbering it.
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This prevents crashes on some programs when using -ds-aa -licm.
llvm-svn: 20831
2005-03-25 06:37:22 +00:00
faf7791fea
Fix a bug where LICM was not updating AA information properly when sinking
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a pointer value out of a loop causing it to be duplicated.
llvm-svn: 20828
2005-03-25 00:22:36 +00:00
1c790bf656
enable -debug-only=licm
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llvm-svn: 20788
2005-03-23 21:00:12 +00:00
7b9020a059
Fix the missing symbols problem Bill was hitting. Patch contributed by
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Bill Wendling!!
llvm-svn: 20649
2005-03-17 15:38:16 +00:00
6cb4559369
stop using method.
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llvm-svn: 20603
2005-03-15 05:19:49 +00:00
531f9e92d4
This mega patch converts us from using Function::a{iterator|begin|end} to
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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
8c79559443
fix a bug where we thought arguments were constants :(
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llvm-svn: 20506
2005-03-06 22:52:29 +00:00
2ce303b406
Fix Regression/Transforms/LoopStrengthReduce/dont_insert_redundant_ops.ll,
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hopefully not breaking too many other things.
llvm-svn: 20505
2005-03-06 22:36:12 +00:00
45403e5052
implement Transforms/LoopStrengthReduce/invariant_value_first_arg.ll
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llvm-svn: 20501
2005-03-06 22:06:22 +00:00
d3874fad44
minor simplifications of the code.
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llvm-svn: 20497
2005-03-06 21:58:22 +00:00
dd3ec92085
trivial simplification
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llvm-svn: 20494
2005-03-06 21:35:38 +00:00
238f6df546
Fix a bug where we could corrupt a parent loop's header info if we unrolled
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a nested loop. This fixes Transforms/LoopUnroll/2005-03-06-BadLoopInfoUpdate.ll
and PR532
llvm-svn: 20493
2005-03-06 20:57:32 +00:00
1b032f59e7
Make this MUCH faster by avoiding a linear search in the symbol table code.
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llvm-svn: 20479
2005-03-06 05:42:36 +00:00
4abcea3a69
Reformat comments to fix 80 columns.
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llvm-svn: 20467
2005-03-05 22:45:40 +00:00
be37fa07fd
Reuse induction variables created for strength-reduced GEPs by other similar GEPs.
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llvm-svn: 20466
2005-03-05 22:40:34 +00:00
6d0a24c608
second argument to Value::setName is now gone.
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llvm-svn: 20463
2005-03-05 19:05:20 +00:00
cfe2822cdf
Do not compute 1ULL << 64, which is undefined. This fixes Ptrdist/ks on the
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sparc, and testcase Regression/Transforms/InstCombine/2005-03-04-ShiftOverflow.ll
llvm-svn: 20445
2005-03-04 23:21:33 +00:00
a2c59b7423
Add support for not strength reducing GEPs where the element size is a small
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power of two. This emphatically includes the zeroeth power of two.
llvm-svn: 20429
2005-03-04 04:04:26 +00:00
ef1e989e4f
Add an optional argument to lower to a specific constant value instead of
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to a "sizeof" expression.
llvm-svn: 20414
2005-03-03 01:03:43 +00:00
8ea6f9e821
Fixed the following LSR bugs:
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* 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.
llvm-svn: 20383
2005-03-01 03:46:11 +00:00
dcaa48b5c4
Fix crash in LSR due to attempt to remove original induction variable. However,
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for reasons explained in the comments, I also deactivated this code as it needs
more thought.
llvm-svn: 20367
2005-02-28 00:08:56 +00:00
fd63d3af0d
PHI nodes were incorrectly placed when more than one GEP is reduced in a loop.
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llvm-svn: 20360
2005-02-27 21:08:04 +00:00
39751c3b7c
First pass at improved Loop Strength Reduction. Still not yet ready for prime time.
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llvm-svn: 20358
2005-02-27 19:37:07 +00:00
7561ca1d15
Teach globalopt how memset/cpy/move affect memory, to allow better optimization.
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llvm-svn: 20352
2005-02-27 18:58:52 +00:00
0ce80cd542
Fix spelling, patch contributed by Gabor Greif!
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llvm-svn: 20343
2005-02-27 06:18:25 +00:00
cc6d75fddf
remove extraneous cast
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llvm-svn: 20334
2005-02-26 18:33:28 +00:00
1cca959e5d
Implement Transforms/SimplifyCFG/switch_thread.ll
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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! :)
llvm-svn: 20300
2005-02-24 06:17:52 +00:00
25169caa80
make this more efficient. Scan up to 16 nodes, not the whole list.
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llvm-svn: 20289
2005-02-23 16:53:04 +00:00
52e931b37d
Remove use of bind_obj
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llvm-svn: 20276
2005-02-22 23:22:58 +00:00
7b5d9e2217
Do not mark obviously unreachable blocks live when processing PHI nodes,
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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
llvm-svn: 20227
2005-02-17 19:28:49 +00:00
31f3382b3b
Fix the second bug attached to PR504.
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llvm-svn: 20181
2005-02-14 20:11:45 +00:00
e616fea3bc
Fix for testcase Transforms/IndVarsSimplify/2005-02-11-InvokeCrash.ll
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and PR504.
llvm-svn: 20129
2005-02-12 03:26:49 +00:00
c4a44c6b3d
Localize globals if they are only used in main(). This replaces the
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global with an alloca, which eventually gets promoted into a
register. This enables a lot of other optimizations later on.
llvm-svn: 20109
2005-02-10 18:36:30 +00:00
346bb20409
Fix crash on MallocInsts of unsized types.
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llvm-svn: 19988
2005-02-02 04:43:37 +00:00
82b42c5d85
API change.
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llvm-svn: 19959
2005-02-01 01:23:49 +00:00
d6a4492f81
Adjust to changes in APIs
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llvm-svn: 19958
2005-02-01 01:23:31 +00:00
f98a7bffb3
Hacks to make this ugly ugly code work with the new use lists.
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llvm-svn: 19957
2005-02-01 01:22:56 +00:00
72684fecf8
Implement InstCombine/cast.ll:test25, a case that occurs many times
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in spec
llvm-svn: 19953
2005-01-31 05:51:45 +00:00
31f486c775
Implement the trivial cases in InstCombine/store.ll
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llvm-svn: 19950
2005-01-31 05:36:43 +00:00
fe1b0b8b24
Implement Transforms/InstCombine/cast-load-gep.ll, which allows us to devirtualize
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11 indirect calls in perlbmk.
llvm-svn: 19947
2005-01-31 04:50:46 +00:00
d8e20188c6
Adjust to changes in instruction interfaces.
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llvm-svn: 19900
2005-01-29 00:39:08 +00:00
a3f06fa2dd
Switchinst takes a hint for the number of cases it will have.
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llvm-svn: 19899
2005-01-29 00:38:45 +00:00
a35dfcedd3
switchinst ctor now takes a hint for the number of cases that it will have.
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llvm-svn: 19898
2005-01-29 00:38:26 +00:00
84d3137da7
Adjust Valuehandle to hold its operand directly in it.
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llvm-svn: 19897
2005-01-29 00:37:36 +00:00
cd517ff0c7
* add some DEBUG statements
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* Properly compile this:
struct a {};
int test() {
struct a b[2];
if (&b[0] != &b[1])
abort ();
return 0;
}
to 'return 0', not abort().
llvm-svn: 19875
2005-01-28 19:32:01 +00:00
fbd921987f
Add a dependency to the trace library so that it gets pulled in
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automatically.
llvm-svn: 19828
2005-01-25 16:23:57 +00:00
Chris Lattner