be11db6894
don't invalidate PN, rewrite of this code is in progress anyway.
...
llvm-svn: 86639
2009-11-10 01:19:06 +00:00
fb7f87d5a3
add a new SimplifyInstruction API, which is like ConstantFoldInstruction,
...
except that the result may not be a constant. Switch jump threading to
use it so that it gets things like (X & 0) -> 0, which occur when phi preds
are deleted and the remaining phi pred was a zero.
llvm-svn: 86637
2009-11-10 01:08:51 +00:00
c1f19071f8
rename SimplifyCompare -> SimplifyCmpInst and split it into
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Simplify[IF]Cmp pieces. Add some predicates to CmpInst to
determine whether a predicate is fp or int.
llvm-svn: 86624
2009-11-09 23:28:39 +00:00
800aad3dda
use instructionsimplify instead of a weak clone of ad-hoc folding stuff.
...
llvm-svn: 86616
2009-11-09 23:00:14 +00:00
2978ca7b79
stub out a new form of BasicBlock::RemovePredecessorAndSimplify which
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simplifies instruction users of PHIs when the phi is eliminated. This
will be moved to transforms/utils after some other refactoring.
llvm-svn: 86603
2009-11-09 22:32:36 +00:00
ea465e221e
comment typos pointed out by Duncan
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llvm-svn: 86497
2009-11-09 00:41:49 +00:00
5ff7f5672e
reapply 86289, 86278, 86270, 86267, 86266 & 86264 plus a fix
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(making pred factoring only happen if threading is guaranteed
to be successful).
This now survives an X86-64 bootstrap of llvm-gcc.
llvm-svn: 86355
2009-11-07 08:05:03 +00:00
3a42e7ac65
Revert following patches to fix llvmgcc bootstrap.
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86289, 86278, 86270, 86267, 86266 & 86264
Chris, please take a look.
llvm-svn: 86321
2009-11-07 01:32:59 +00:00
8f77e948e5
Avoid "ambiguous 'else'" warning from gcc.
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llvm-svn: 86314
2009-11-07 00:26:47 +00:00
eb690feaef
Fix a bug where we'd call SplitBlockPredecessors with a pred in the
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set only once even if it has multiple edges to BB.
llvm-svn: 86299
2009-11-06 23:19:58 +00:00
a70917b2f4
Remove function left over from other jump threading cleanup.
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llvm-svn: 86289
2009-11-06 21:24:57 +00:00
a8b9ce3f07
Fix a problem discovered on self host.
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llvm-svn: 86278
2009-11-06 19:21:48 +00:00
d91a7960bf
remove more code subsumed by r86264
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llvm-svn: 86270
2009-11-06 18:24:32 +00:00
899ef22acb
eliminate some more code subsumed by r86264
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llvm-svn: 86267
2009-11-06 18:22:54 +00:00
2f6184f6aa
remove now redundant code, r86264 handles this case.
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llvm-svn: 86266
2009-11-06 18:20:58 +00:00
68d2417e05
Extend jump threading to support much more general threading
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predicates. This allows us to jump thread things like:
_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit119:
%tmp1.i24166 = phi i8 [ 1, %bb5.i117 ], [ %tmp1.i24165, %_Z....exit ], [ %tmp1.i24165, %bb4.i114 ]
%toBoolnot.i87 = icmp eq i8 %tmp1.i24166, 0 ; <i1> [#uses=1]
%tmp4.i90 = icmp eq i32 %tmp2.i, 6 ; <i1> [#uses=1]
%or.cond173 = and i1 %toBoolnot.i87, %tmp4.i90 ; <i1> [#uses=1]
br i1 %or.cond173, label %bb4.i96, label %_ZN12...
Where it is "obvious" that when coming from %bb5.i117 that the 'and' is always
false. This triggers a surprisingly high number of times in the testsuite,
and gets us closer to generating good code for doug's strswitch testcase.
This also make a bunch of other code in jump threading redundant, I'll rip
out in the next patch. This survived an enable-checking llvm-gcc bootstrap.
llvm-svn: 86264
2009-11-06 18:15:14 +00:00
46b5c642b9
remove a bunch of extraneous LLVMContext arguments
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from various APIs, addressing PR5325.
llvm-svn: 86231
2009-11-06 04:27:31 +00:00
a09062758b
improve DSE when TargetData is not around, based on work by
...
Hans Wennborg!
llvm-svn: 86067
2009-11-04 23:20:12 +00:00
85c85c5e04
when folding duplicate conditions, delete the
...
now-probably-dead instruction tree feeding it.
llvm-svn: 83778
2009-10-11 18:39:58 +00:00
97b1405207
implement a transformation in jump threading that is currently
...
done by condprop, but do it in a much more general form. The
basic idea is that we can do a limited form of tail duplication
in the case when we have a branch on a phi. Moving the branch
up in to the predecessor block makes instruction selection
much easier and encourages chained jump threadings.
llvm-svn: 83759
2009-10-11 07:24:57 +00:00
6ce85e85f5
restructure some code, no functionality change.
...
llvm-svn: 83756
2009-10-11 04:40:21 +00:00
f466bc84c9
factor some code better and move a function, no functionality change.
...
llvm-svn: 83755
2009-10-11 04:33:43 +00:00
f99a74e24b
make jump threading on a phi with undef inputs happen.
...
llvm-svn: 83754
2009-10-11 04:18:15 +00:00
84095071ea
Change jump threading to use the new SSAUpdater class instead of
...
DemoteRegToStack. This makes it more efficient (because it isn't
creating a ton of load/stores that are eventually removed by a later
mem2reg), and more slightly more effective (because those load/stores
don't get in the way of threading).
llvm-svn: 83706
2009-10-10 09:05:58 +00:00
42fb7452df
Instruction::clone does not need to take an LLVMContext&. Remove that and
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update all the callers.
llvm-svn: 82889
2009-09-27 07:38:41 +00:00
2dd09dbdf7
eliminate VISIBILITY_HIDDEN from Transforms/Scalar. PR4861
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llvm-svn: 80766
2009-09-02 06:11:42 +00:00
55f1c09e31
Push LLVMContexts through the IntegerType APIs.
...
llvm-svn: 78948
2009-08-13 21:58:54 +00:00
23a204d91b
Move getTrue() and getFalse() to 2.5-like APIs.
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llvm-svn: 77685
2009-07-31 17:39:07 +00:00
b292b8ce70
Move more code back to 2.5 APIs.
...
llvm-svn: 77635
2009-07-30 23:03:37 +00:00
487375e9a2
Move ConstantExpr to 2.5 API.
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llvm-svn: 77494
2009-07-29 18:55:55 +00:00
6115b39ffd
Remove Value::getName{Start,End}, the last of the old Name APIs.
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llvm-svn: 77152
2009-07-26 09:48:23 +00:00
9813b0b025
Eliminate some uses of DOUT, cerr, and getNameStart().
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llvm-svn: 77145
2009-07-26 07:49:05 +00:00
edb4a70325
Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types. More to come.
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llvm-svn: 77011
2009-07-24 23:12:02 +00:00
67243a4bec
Convert several more passes to use getAnalysisIfAvailable<TargetData>()
...
instead of getAnalysis<TargetData>().
llvm-svn: 76982
2009-07-24 18:13:53 +00:00
47db941fd3
Get rid of the Pass+Context magic.
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llvm-svn: 76702
2009-07-22 00:24:57 +00:00
c37bc69e91
Rename getConstantInt{True|False} to get{True|False} at Chris' behest.
...
llvm-svn: 76598
2009-07-21 18:03:38 +00:00
4fdeba9706
Revert yesterday's change by removing the LLVMContext parameter to AllocaInst and MallocInst.
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llvm-svn: 75863
2009-07-15 23:53:25 +00:00
b6b2530000
Move EVER MORE stuff over to LLVMContext.
...
llvm-svn: 75703
2009-07-14 23:09:55 +00:00
1e5f00e7a7
This started as a small change, I swear. Unfortunately, lots of things call the [I|F]CmpInst constructors. Who knew!?
...
llvm-svn: 75200
2009-07-09 23:48:35 +00:00
38264b1554
"LLVMContext* " --> "LLVMContext *"
...
llvm-svn: 74878
2009-07-06 23:00:19 +00:00
39f00cc1d4
Thread LLVMContext through the constant folding APIs, which touches a lot of files.
...
llvm-svn: 74844
2009-07-06 18:42:36 +00:00
80baed63b4
Second batch of passes using LLVMContext.
...
llvm-svn: 74753
2009-07-03 00:54:20 +00:00
f3f6aaa2c3
fix inverted logic pointed out by John McCall, noticed by inspection.
...
This was considering vector intrinsics to have cost 2, but non-vector
intrinsics to have cost 1, which is backward.
llvm-svn: 74698
2009-07-02 15:39:39 +00:00
43f33dd550
Fix a bunch of other places that used operator[] to test whether
...
a key is present in a std::map or DenseMap to use find instead.
llvm-svn: 74676
2009-07-02 00:17:47 +00:00
d0a363e03b
make jump threading handle lexically identical compare instructions
...
as if they were multiple uses of the same instruction. This interacts
well with the existing loadpre that j-t does to open up many new jump
threads earlier.
llvm-svn: 73768
2009-06-19 16:27:56 +00:00
77585a24ac
Teach jump threading to look at comparisons between phi nodes and non-constants.
...
llvm-svn: 73755
2009-06-19 04:56:29 +00:00
fa552d728d
fix some problems spotted by Duncan and Nicolas Geoffray
...
llvm-svn: 70872
2009-05-04 16:29:24 +00:00
d579cb1167
* Sink 4 duplicates of edge threading validity checks and DOUT prints into
...
ThreadEdge directly. This shares the code, but is just a refactoring.
* Make JumpThreading compute the set of loop headers and avoid threading
across them. This prevents jump threading from forming irreducible
loops (goodness) but also prevents it from threading in other cases that
are beneficial (see the comment above FindFunctionBackedges).
llvm-svn: 70820
2009-05-04 02:28:08 +00:00
87077356be
Fix a debug info dependency in jump threading.
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llvm-svn: 67064
2009-03-17 00:38:24 +00:00
e6d1e8d0cc
this wasn't intended to go in.
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llvm-svn: 66252
2009-03-06 05:42:30 +00:00
Chris Lattner