52131344a2
Remove PHINode::reserveOperandSpace(). Instead, add a parameter to
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PHINode::Create() giving the (known or expected) number of operands.
llvm-svn: 128537
2011-03-30 11:28:46 +00:00
e0938d8a87
(Almost) always call reserveOperandSpace() on newly created PHINodes.
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llvm-svn: 128535
2011-03-30 11:19:20 +00:00
0bb2ad2cf7
Constant folding support for calls to umul.with.overflow(), basically identical to the smul.with.overflow() code.
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llvm-svn: 128379
2011-03-27 14:26:13 +00:00
c4f0ab397c
Revert r128140 for now.
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llvm-svn: 128149
2011-03-23 15:51:12 +00:00
9ed8d93f55
A global variable with internal linkage where all uses are in one function and whose address is never taken is a non-escaping local object and can't alias anything else.
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llvm-svn: 128140
2011-03-23 02:19:48 +00:00
f0469af63e
Fix INT_MIN gotcha pointed out by Eli Friedman.
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llvm-svn: 128028
2011-03-21 21:40:32 +00:00
1c4b42d00f
Avoid creating canonical induction variables for non-native types.
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For example, on 32-bit architecture, don't promote all uses of the IV
to 64-bits just because one use is a 64-bit cast.
Alternate implementation of the patch by Arnaud de Grandmaison.
llvm-svn: 127884
2011-03-18 16:50:32 +00:00
87716c93c2
Added isValidRewrite() to check the result of ScalarEvolutionExpander.
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SCEV may generate expressions composed of multiple pointers, which can
lead to invalid GEP expansion. Until we can teach SCEV to follow strict
pointer rules, make sure no bad GEPs creep into IR.
Fixes rdar://problem/9038671.
llvm-svn: 127839
2011-03-17 23:51:11 +00:00
b4d763b37d
Add comments for the demanglings. Correct mangled form of operator delete!
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llvm-svn: 127801
2011-03-17 05:20:12 +00:00
c1f8658368
Add C++ global operator {new,new[],delete,delete[]}(unsigned {int,long}) to the
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memory builtins as equivalent to malloc/free.
This is different from any attribute we have. For example, you can delete the
allocators when their result is unused, but you can't collapse two calls to the
same function, even if no global/memory state has changed in between. The
noalias return states that the result does not alias any other pointer, but
instcombine optimizes malloc() as though the result is non-null for the purpose
of eliminating unused pointers.
llvm-svn: 127673
2011-03-15 07:31:32 +00:00
a34f1b1f10
Remove getMinusSCEVForExitTest().
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This function performed acrobatics to prove no-self-wrap, which we now
have for free.
llvm-svn: 127643
2011-03-15 01:16:14 +00:00
f6b01ff422
Propagate SCEV no-wrap flags whenever possible.
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This needs review.
llvm-svn: 127638
2011-03-15 00:37:00 +00:00
e92dcceab7
Negating a recurrence preserves no-self-wrap.
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llvm-svn: 127593
2011-03-14 17:38:54 +00:00
f1781db622
HowFarToZero can compute a trip count as long as the recurrence has no-self-wrap.
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llvm-svn: 127591
2011-03-14 17:28:02 +00:00
8b55b736b1
Added SCEV::NoWrapFlags to manage unsigned, signed, and self wrap
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properties.
Added the self-wrap flag for SCEV::AddRecExpr.
A slew of temporary FIXMEs indicate the intention of the no-self-wrap flag
without changing behavior in this revision.
llvm-svn: 127590
2011-03-14 16:50:06 +00:00
5acc751b6f
Teach ComputeMaskedBits about sub nsw.
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llvm-svn: 127548
2011-03-12 17:18:11 +00:00
391a946fa9
ComputeMaskedBits: sub falls through to add, and sub doesn't have the same overflow semantics as add.
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Should fix the selfhost failures that started with r127463.
llvm-svn: 127465
2011-03-11 14:46:49 +00:00
cc79973856
Teach ComputeMaskedBits about nsw on add. I don't think there's anything we can
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do with nuw here, but sub and mul should be given similar treatment.
Fixes PR9343 #15 !
llvm-svn: 127463
2011-03-11 09:00:19 +00:00
fa31d38aad
Introduce DebugInfoProbe. This is used to monitor how llvm optimizer is treating debugging information.
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It generates output that lools like
8 times line number info lost by Scalar Replacement of Aggregates (SSAUp)
1 times line number info lost by Simplify well-known library calls
12 times variable info lost by Jump Threading
llvm-svn: 127381
2011-03-10 00:21:25 +00:00
2afa325811
When SCEV can determine the loop test is X < X, set ExactBECount=0.
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When ExactBECount is a constant, use it for MaxBECount.
When MaxBECount cannot be computed, replace it with ExactBECount.
Fixes PR9424.
llvm-svn: 127342
2011-03-09 17:29:58 +00:00
2a3b71684a
whitespace
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llvm-svn: 127340
2011-03-09 17:23:39 +00:00
774647d974
Fix two cases I forgot to update when doing a mental "getSwappedPredicate".
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Thanks Duncan Sands!
llvm-svn: 127323
2011-03-09 08:20:06 +00:00
980104d1d6
Add another micro-optimization. Apologies for the lack of refactoring, but I
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gave up when I realized I couldn't come up with a good name for what the
refactored function would be, to describe what it does.
This is PR9343 test12, which is test3 with arguments reordered. Whoops!
llvm-svn: 127318
2011-03-09 06:26:03 +00:00
7dc3d47c34
Fix PR9331. Simplified version of a patch by Jakub Staszak.
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llvm-svn: 127243
2011-03-08 12:39:03 +00:00
e467979d0a
Add more analysis of the sign bit of an srem instruction. If the LHS is negative
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then the result could go either way. If it's provably positive then so is the
srem. Fixes PR9343 #7 !
llvm-svn: 127146
2011-03-07 01:50:10 +00:00
9719a719c7
Thread comparisons over udiv/sdiv/ashr/lshr exact and lshr nuw/nsw whenever
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possible. This goes into instcombine and instsimplify because instsimplify
doesn't need to check hasOneUse since it returns (almost exclusively) constants.
This fixes PR9343 #4 #5 and #8 !
llvm-svn: 127064
2011-03-05 05:19:11 +00:00
aa036eedb8
When decling to reuse existing expressions that involve casts, ignore
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bitcasts, which are really no-ops here. This fixes slowdowns on
MultiSource/Applications/aha and others.
llvm-svn: 127031
2011-03-04 20:46:46 +00:00
41c529bd09
Revert broken srem logic from r126991.
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llvm-svn: 127021
2011-03-04 19:26:08 +00:00
8e3a79da9f
Fold "icmp pred (srem X, Y), Y" like we do for urem. Handle signed comparisons
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in the urem case, though not the other way around. This is enough to get #3 from
PR9343!
llvm-svn: 126991
2011-03-04 10:06:52 +00:00
3cec6f5563
Teach instruction simplify to use constant ranges to solve problems of the form
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"icmp pred %X, CI" and a number of examples where "%X = binop %Y, CI2".
Some of these cases (div and rem) used to make it through opt -O2, but the
others are probably now making code elsewhere redundant (probably instcombine).
llvm-svn: 126988
2011-03-04 07:00:57 +00:00
bf577d6a86
Remove DIFactory. Patch by Devang.
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llvm-svn: 126871
2011-03-02 20:30:37 +00:00
7290868a1b
Don't re-use existing addrec expansions if they contain casts.
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This fixes PR9259.
llvm-svn: 126812
2011-03-02 01:34:10 +00:00
40eee1e970
Today, the language front ends produces llvm.dbg.* intrinsics, used to encode arguments' debug info, in order any way, most of the times. However, if a front end mix-n-matches llvm.dbg.declare and llvm.dbg.value intrinsics to encode debug info for arguments then code generator needs a way to find argument order.
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Use 8 bits from line number field to keep track of argument ordering while encoding debug info for an argument. That leaves 24 bit for line no, DebugLoc also allocates 24 bit for line numbers. If a function has more than 255 arguments then rest of the arguments will be ordered by llvm.dbg.* intrinsics' ordering in IR.
llvm-svn: 126793
2011-03-01 22:58:13 +00:00
c9d20067cd
Optimize "icmp pred (urem X, Y), Y" --> true/false depending on pred. There's
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more work to do here, "icmp ult (urem X, 10), 11" doesn't optimize away yet.
Fixes example 3 from PR9343!
llvm-svn: 126741
2011-03-01 08:15:50 +00:00
49d15b959e
Unbreak CMake build.
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llvm-svn: 126717
2011-03-01 00:02:51 +00:00
161058838c
Delete the LiveValues pass. I won't get get back to the project it
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was started for in the foreseeable future.
llvm-svn: 126668
2011-02-28 19:37:59 +00:00
afe4a3062d
Fix comment.
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llvm-svn: 126645
2011-02-28 09:18:11 +00:00
66f4f22f7b
srem doesn't actually have the same resulting sign as its numerator, you could
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also have a zero when numerator = denominator. Reverts parts of r126635 and
r126637.
llvm-svn: 126644
2011-02-28 09:17:39 +00:00
c9aab8567b
Teach value tracking to make use of flags in more situations.
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llvm-svn: 126642
2011-02-28 08:02:21 +00:00
29dbbd12c1
Teach ValueTracking to look at the dividend when determining the sign bit of an
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srem instruction.
llvm-svn: 126637
2011-02-28 06:52:12 +00:00
98eecaf0a9
RegionPrinter: Ignore back edges when layouting the graph
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llvm-svn: 126564
2011-02-27 04:11:07 +00:00
9b4127349c
Follow LLVM coding style.
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clang uses DBuilder, so it requries corresponding change.
llvm-svn: 126231
2011-02-22 18:56:12 +00:00
5b7a4e0195
Move "A | ~(A & ?) -> -1" from InstCombine to InstructionSimplify.
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llvm-svn: 126082
2011-02-20 15:20:01 +00:00
acf6b0776a
Stores of null pointers should turn into memset, we weren't recognizing
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them as splat values.
llvm-svn: 126041
2011-02-19 19:35:49 +00:00
5ed962656c
Move library stuff out of the toplevel CMakeLists.txt file.
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llvm-svn: 125968
2011-02-18 22:06:14 +00:00
4ab0852080
Move DbgInfoPrinter specific utlities inside DbgInfoPrinter.cpp
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llvm-svn: 125571
2011-02-15 17:36:11 +00:00
27924da676
Print function info. Patch by Minjang Kim.
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llvm-svn: 125567
2011-02-15 17:24:56 +00:00
69229316aa
convert ConstantVector::get to use ArrayRef.
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llvm-svn: 125537
2011-02-15 00:14:00 +00:00
34442e6ebf
revert my ConstantVector patch, it seems to have made the llvm-gcc
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builders unhappy.
llvm-svn: 125504
2011-02-14 18:15:46 +00:00
d9f5b88548
Switch ConstantVector::get to use ArrayRef instead of a pointer+size
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idiom. Change various clients to simplify their code.
llvm-svn: 125487
2011-02-14 07:55:32 +00:00
Jay Foad