Chris Lattner [Thu, 6 Jan 2011 07:41:22 +0000 (07:41 +0000)]
add a note about object size from drystone, add a poorly optimized loop from 179.art.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122954
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 6 Jan 2011 07:09:23 +0000 (07:09 +0000)]
add a trivial instcombine missed in Dhrystone
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122953
91177308-0d34-0410-b5e6-
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Evan Cheng [Thu, 6 Jan 2011 06:52:41 +0000 (06:52 +0000)]
Re-implement r122936 with proper target hooks. Now getMaxStoresPerMemcpy
etc. takes an option OptSize. If OptSize is true, it would return
the inline limit for functions with attribute OptSize.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122952
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 6 Jan 2011 06:19:46 +0000 (06:19 +0000)]
implement constant folding support for an exotic constant expr:
ret i64 ptrtoint (i8* getelementptr ([1000 x i8]* @X, i64 1, i64 sub (i64 0, i64 ptrtoint ([1000 x i8]* @X to i64))) to i64)
to "ret i64 1000". This allows us to correctly compute the trip count
on a loop in PR8883, which occurs with std::fill on a char array. This
allows us to transform it into a memset with a constant size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122950
91177308-0d34-0410-b5e6-
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Evan Cheng [Thu, 6 Jan 2011 06:17:53 +0000 (06:17 +0000)]
Revert r122936. I'll re-implement the change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122949
91177308-0d34-0410-b5e6-
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Michael J. Spencer [Thu, 6 Jan 2011 05:58:02 +0000 (05:58 +0000)]
UnitTests/Path: Add magical tests. This will also test identify_magic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122948
91177308-0d34-0410-b5e6-
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Michael J. Spencer [Thu, 6 Jan 2011 05:57:54 +0000 (05:57 +0000)]
UnitTests/Path: More ASSERT_NO_ERROR cleanup.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122947
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Cameron Zwarich [Thu, 6 Jan 2011 02:56:42 +0000 (02:56 +0000)]
Add the CallInst optimizations that don't involve expanding inline assembly to
OptimizeInst() so that they can be used on a worklist instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122945
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Cameron Zwarich [Thu, 6 Jan 2011 02:44:52 +0000 (02:44 +0000)]
Move the GEP handling in CodeGenPrepare to OptimizeInst().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122944
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Cameron Zwarich [Thu, 6 Jan 2011 02:37:26 +0000 (02:37 +0000)]
Split the optimizations in CodeGenPrepare that don't manipulate the iterators
into a separate function, so that it can be called from a loop using a worklist
rather than a loop traversing a whole basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122943
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Thu, 6 Jan 2011 01:33:22 +0000 (01:33 +0000)]
Zap the last two -Wself-assign warnings in llvm.
Simplify RALinScan::DowngradeRegister with TRI::getOverlaps while we are there.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122940
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Thu, 6 Jan 2011 01:21:53 +0000 (01:21 +0000)]
Add the SpillPlacement analysis pass.
This pass precomputes CFG block frequency information that can be used by the
register allocator to find optimal spill code placement.
Given an interference pattern, placeSpills() will compute which basic blocks
should have the current variable enter or exit in a register, and which blocks
prefer the stack.
The algorithm is ready to consume block frequencies from profiling data, but for
now it gets by with the static estimates used for spill weights.
This is a work in progress and still not hooked up to RegAllocGreedy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122938
91177308-0d34-0410-b5e6-
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Bill Wendling [Thu, 6 Jan 2011 01:09:35 +0000 (01:09 +0000)]
Fix test to coincide with r122934 change from PR8919.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122937
91177308-0d34-0410-b5e6-
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Evan Cheng [Thu, 6 Jan 2011 01:04:47 +0000 (01:04 +0000)]
r105228 reduced the memcpy / memset inline limit to 4 with -Os to avoid blowing
up freebsd bootloader. However, this doesn't make much sense for Darwin, whose
-Os is meant to optimize for size only if it doesn't hurt performance.
rdar://
8821501
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122936
91177308-0d34-0410-b5e6-
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Evan Cheng [Thu, 6 Jan 2011 01:02:44 +0000 (01:02 +0000)]
Avoid zero extend bit test operands to pointer type if all the masks fit in
the original type of the switch statement key.
rdar://
8781238
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122935
91177308-0d34-0410-b5e6-
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Bill Wendling [Thu, 6 Jan 2011 00:50:34 +0000 (00:50 +0000)]
PR8919 - LLVM incorrectly generates "_alloca" as the stack probing call. That
works only on MinGW32. On 64-bit, the function to call is "__chkstk".
Patch by KS Sreeram!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122934
91177308-0d34-0410-b5e6-
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Bill Wendling [Thu, 6 Jan 2011 00:47:10 +0000 (00:47 +0000)]
PR8918 - When used with MinGW64, LLVM generates a "calll __main" at the
beginning of the "main" function. The assembler complains about the invalid
suffix for the 'call' instruction. The right instruction is "callq __main".
Patch by KS Sreeram!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122933
91177308-0d34-0410-b5e6-
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Cameron Zwarich [Thu, 6 Jan 2011 00:42:50 +0000 (00:42 +0000)]
Stop reallocating SunkAddrs for each basic block. When we move to an instruction
worklist, the key will need to become std::pair<BasicBlock*, Value*>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122932
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Owen Anderson [Wed, 5 Jan 2011 23:26:22 +0000 (23:26 +0000)]
Reorder, rename, and document some members to make this easier to follow.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122929
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Evan Cheng [Wed, 5 Jan 2011 23:06:49 +0000 (23:06 +0000)]
Optimize:
r1025 = s/zext r1024, 4
r1026 = extract_subreg r1025, 4
to:
r1026 = copy r1024
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122925
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Chris Lattner [Wed, 5 Jan 2011 22:28:46 +0000 (22:28 +0000)]
fix PR8900, a shuffle miscompilation. Patch by Nadav Rotem!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122921
91177308-0d34-0410-b5e6-
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Chris Lattner [Wed, 5 Jan 2011 22:26:52 +0000 (22:26 +0000)]
silence more self assignment warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122920
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Wed, 5 Jan 2011 21:50:24 +0000 (21:50 +0000)]
Add a hidden command line option to display edge bundle graphs as they are
calculated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122912
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Wed, 5 Jan 2011 21:50:21 +0000 (21:50 +0000)]
Silence a warning from non-standard warning avoidance code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122911
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Eric Christopher [Wed, 5 Jan 2011 21:45:56 +0000 (21:45 +0000)]
80-cols.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122909
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Owen Anderson [Wed, 5 Jan 2011 21:37:18 +0000 (21:37 +0000)]
When computing the value on an edge, in certain cases LVI would fail to compute the value range
in the predecessor block, leading to an incorrect conclusion for the edge value. Found by inspection.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122908
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Bob Wilson [Wed, 5 Jan 2011 21:16:50 +0000 (21:16 +0000)]
Revert svn 122743, removing the instcombine pass that was replaced by earlycse.
My i386 llvm-gcc nightly tester found a regression for
SingleSource/Benchmarks/McGill/chomp that a bisect blamed on 122743.
That seems strange but apparently the combination of earlycse and instcombine
did something bad. Chris says he intended to remove the instcombine pass, so
let's go ahead and try that. We'll see if there are any performance losses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122907
91177308-0d34-0410-b5e6-
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Owen Anderson [Wed, 5 Jan 2011 21:15:29 +0000 (21:15 +0000)]
Re-convert several of LazyValueInfo's internal maps to Dense{Map|Set}, and fix the issue in
hasBlockValue() that was causing iterator invalidations. Many thanks to Dimitry Andric for
tracking down those invalidations!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122906
91177308-0d34-0410-b5e6-
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Chris Lattner [Wed, 5 Jan 2011 18:41:05 +0000 (18:41 +0000)]
fix some -Wself-assign warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122893
91177308-0d34-0410-b5e6-
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Cameron Zwarich [Wed, 5 Jan 2011 17:47:38 +0000 (17:47 +0000)]
Add some more statistics to CodeGenPrepare.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122891
91177308-0d34-0410-b5e6-
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Wesley Peck [Wed, 5 Jan 2011 17:34:20 +0000 (17:34 +0000)]
Commit 122778 broke DWARF debug output when using the MBlaze backend. Fixed by overriding TargetFrameInfo::getFrameIndexOffset to take into account the new frame index information.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122889
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Cameron Zwarich [Wed, 5 Jan 2011 17:27:27 +0000 (17:27 +0000)]
Add some stats to CodeGenPrepare to make it easier to speed it up without
regressing code quality.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122887
91177308-0d34-0410-b5e6-
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Wesley Peck [Wed, 5 Jan 2011 17:01:57 +0000 (17:01 +0000)]
Fix small bug in setDebugInfoAvailability.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122886
91177308-0d34-0410-b5e6-
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Michael J. Spencer [Wed, 5 Jan 2011 16:39:46 +0000 (16:39 +0000)]
UnitTests/Path: Fix typo, add error number, and enable the directory cleanup code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122885
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Michael J. Spencer [Wed, 5 Jan 2011 16:39:38 +0000 (16:39 +0000)]
Support/PathV2: Implement remove_all.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122884
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Michael J. Spencer [Wed, 5 Jan 2011 16:39:30 +0000 (16:39 +0000)]
Support/Windows/PathV2: Make directory iteration ignore . and ..
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122883
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Michael J. Spencer [Wed, 5 Jan 2011 16:39:22 +0000 (16:39 +0000)]
Support/Windows/PathV2: Fix remove to handle both files and directories.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122882
91177308-0d34-0410-b5e6-
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Michael J. Spencer [Wed, 5 Jan 2011 16:39:13 +0000 (16:39 +0000)]
Support/PathV2: Implement directory_entry::status.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122881
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Michael J. Spencer [Wed, 5 Jan 2011 16:39:05 +0000 (16:39 +0000)]
UnitTests/PathV2: Setup a test fixture to make tracking created file system
entities easier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122880
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Michael J. Spencer [Wed, 5 Jan 2011 16:38:57 +0000 (16:38 +0000)]
Support/PathV2: Implement directory iteration on POSIX.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122879
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Cameron Zwarich [Wed, 5 Jan 2011 16:08:47 +0000 (16:08 +0000)]
Use pop_back_val instead of back followed by pop_back.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122876
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Frits van Bommel [Wed, 5 Jan 2011 15:10:24 +0000 (15:10 +0000)]
Fix lit for people whose LLVM path contains 'opt', which is a common directory name on Unix-like systems.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122873
91177308-0d34-0410-b5e6-
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Cameron Zwarich [Wed, 5 Jan 2011 05:47:47 +0000 (05:47 +0000)]
Use a worklist for later iterations just like ordinary instsimplify. The next
step is to only process instructions in subloops if they have been modified by
an earlier simplification.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122869
91177308-0d34-0410-b5e6-
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Cameron Zwarich [Wed, 5 Jan 2011 05:15:53 +0000 (05:15 +0000)]
Change LoopInstSimplify back to a LoopPass. It revisits subloops rather than
skipping them, but it should probably use a worklist and only revisit those
instructions in subloops that have actually changed. It should probably also
use a worklist after the first iteration like instsimplify now does. Regardless,
it's only 0.3% of opt -O2 time on 403.gcc if it replaces the instcombine placed
in the middle of the loop passes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122868
91177308-0d34-0410-b5e6-
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Chris Lattner [Wed, 5 Jan 2011 01:03:32 +0000 (01:03 +0000)]
Fix PR8906: -fno-builtin should disable loop-idiom recognition.
It forms memset and memcpy's, and will someday form popcount and
other stuff. All of this is bad when compiling the implementation
of memset, memcpy, popcount, etc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122854
91177308-0d34-0410-b5e6-
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Eric Christopher [Tue, 4 Jan 2011 22:31:50 +0000 (22:31 +0000)]
Remove TODO, these appear to be implemented.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122849
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Owen Anderson [Tue, 4 Jan 2011 22:15:21 +0000 (22:15 +0000)]
Don't bother value numbering instructions with void types in GVN. In theory this should allow us to insert
fewer things into the value numbering maps, but any speedup is beneath the noise threshold on my machine
on 403.gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122844
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Tue, 4 Jan 2011 21:10:11 +0000 (21:10 +0000)]
Use the EdgeBundles analysis in X86FloatingPoint instead of recomputing CFG
bundles in the pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122833
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Tue, 4 Jan 2011 21:10:05 +0000 (21:10 +0000)]
Turn the EdgeBundles class into a stand-alone machine CFG analysis pass.
The analysis will be needed by both the greedy register allocator and the
X86FloatingPoint pass. It only needs to be computed once when the CFG doesn't
change.
This pass is very fast, usually showing up as 0.0% wall time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122832
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Dale Johannesen [Tue, 4 Jan 2011 19:31:24 +0000 (19:31 +0000)]
Eliminate a warning compiling with llvm-gcc. (IMO the
warning is overzealous but gcc is what it is.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122829
91177308-0d34-0410-b5e6-
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Owen Anderson [Tue, 4 Jan 2011 19:29:46 +0000 (19:29 +0000)]
Complete the NumberTable --> LeaderTable rename.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122828
91177308-0d34-0410-b5e6-
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Owen Anderson [Tue, 4 Jan 2011 19:25:18 +0000 (19:25 +0000)]
Fix typo in a comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122827
91177308-0d34-0410-b5e6-
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Owen Anderson [Tue, 4 Jan 2011 19:24:57 +0000 (19:24 +0000)]
Prune #include's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122826
91177308-0d34-0410-b5e6-
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Owen Anderson [Tue, 4 Jan 2011 19:13:25 +0000 (19:13 +0000)]
Clarify terminology, settling on referring to what was the "number table" as the "leader table", and
rename methods to make it much more clear what they're doing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122823
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Owen Anderson [Tue, 4 Jan 2011 19:10:54 +0000 (19:10 +0000)]
When removing a value from GVN's leaders list, don't drop the Next pointer in a corner case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122822
91177308-0d34-0410-b5e6-
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Dale Johannesen [Tue, 4 Jan 2011 19:01:54 +0000 (19:01 +0000)]
Improve the accuracy of the inlining heuristic looking for the
case where a static caller is itself inlined everywhere else, and
thus may go away if it doesn't get too big due to inlining other
things into it. If there are references to the caller other than
calls, it will not be removed; account for this.
This results in same-day completion of the case in PR8853.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122821
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Owen Anderson [Tue, 4 Jan 2011 18:54:18 +0000 (18:54 +0000)]
Branch instructions don't produce values, so there's no need to generate a value number for them. This
avoids adding them to the various value numbering tables, resulting in a minor (~3%) speedup for GVN
on 40.gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122819
91177308-0d34-0410-b5e6-
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Owen Anderson [Tue, 4 Jan 2011 18:22:08 +0000 (18:22 +0000)]
Remove commented out code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122817
91177308-0d34-0410-b5e6-
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Owen Anderson [Tue, 4 Jan 2011 18:21:18 +0000 (18:21 +0000)]
Give MachineFunctionAnalysis a getPassName() implementation to make timing reports prettier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122816
91177308-0d34-0410-b5e6-
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Cameron Zwarich [Tue, 4 Jan 2011 18:19:19 +0000 (18:19 +0000)]
Switch to the new style of asterisk placement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122815
91177308-0d34-0410-b5e6-
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Chris Lattner [Tue, 4 Jan 2011 18:19:15 +0000 (18:19 +0000)]
fix an off-by-one bug that caused a crash analyzing
ashr's with huge shift amounts, PR8896
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122814
91177308-0d34-0410-b5e6-
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Michael J. Spencer [Tue, 4 Jan 2011 17:00:18 +0000 (17:00 +0000)]
UnitTests/Path: Produce useful diagnostics on error.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122812
91177308-0d34-0410-b5e6-
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Cameron Zwarich [Tue, 4 Jan 2011 16:24:51 +0000 (16:24 +0000)]
Switch to path halving from path compression for a small speedup. This also
makes getLeader() nonrecursive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122811
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Tobias Grosser [Tue, 4 Jan 2011 16:01:17 +0000 (16:01 +0000)]
Include llvm-gcc dir before llvm_tools_dir
This ensures that always the recently compiled tools are picked for testing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122810
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Duncan Sands [Tue, 4 Jan 2011 12:52:29 +0000 (12:52 +0000)]
These methods should be "const"; make them so.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122809
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Francois Pichet [Tue, 4 Jan 2011 10:23:42 +0000 (10:23 +0000)]
Disable r122754 on Windows: was causing all lit tests to fail.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122808
91177308-0d34-0410-b5e6-
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Chris Lattner [Tue, 4 Jan 2011 07:46:33 +0000 (07:46 +0000)]
Teach loop-idiom to turn a loop containing a memset into a larger memset
when safe.
The testcase is basically this nested loop:
void foo(char *X) {
for (int i = 0; i != 100; ++i)
for (int j = 0; j != 100; ++j)
X[j+i*100] = 0;
}
which gets turned into a single memset now. clang -O3 doesn't optimize
this yet though due to a phase ordering issue I haven't analyzed yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122806
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Chris Lattner [Tue, 4 Jan 2011 07:27:30 +0000 (07:27 +0000)]
restructure this a bit. Initialize the WeakVH with "I", the
instruction *after* the store. The store will always be deleted
if the transformation kicks in, so we'd do an N^2 scan of every
loop block. Whoops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122805
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Cameron Zwarich [Tue, 4 Jan 2011 06:42:27 +0000 (06:42 +0000)]
Eliminate repeated allocation of a per-BB DenseMap for a 4.6% reduction of time
spent in StrongPHIElimination on 403.gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122803
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Cameron Zwarich [Tue, 4 Jan 2011 04:43:31 +0000 (04:43 +0000)]
Avoid finding loop back edges when we are not splitting critical edges in
CodeGenPrepare (which is the default behavior).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122801
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David Greene [Tue, 4 Jan 2011 01:05:30 +0000 (01:05 +0000)]
Don't pattern match "/clang" so we don't mangle directory names. Some
tests use absolute paths to clang.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122796
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Owen Anderson [Tue, 4 Jan 2011 00:55:21 +0000 (00:55 +0000)]
Clean up a funky pass registration that got passed over when I got rid of static constructors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122795
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Andrew Trick [Tue, 4 Jan 2011 00:32:57 +0000 (00:32 +0000)]
Fix the ARM IIC_iCMPsi itinerary and add an important assert.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122794
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Cameron Zwarich [Tue, 4 Jan 2011 00:12:46 +0000 (00:12 +0000)]
Address most of Duncan's review comments. Also, make LoopInstSimplify a simple
FunctionPass. It probably doesn't have a reason to be a LoopPass, as it will
probably drop the simple fixed point and either use RPO iteration or Duncan's
approach in instsimplify of only revisiting instructions that have changed.
The next step is to preserve LoopSimplify. This looks like it won't be too hard,
although the pass manager doesn't actually seem to respect when non-loop passes
claim to preserve LCSSA or LoopSimplify. This will have to be fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122791
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Chris Lattner [Tue, 4 Jan 2011 00:06:55 +0000 (00:06 +0000)]
use the very-handy getTruncateOrZeroExtend helper function, and
stop setting NSW: signed overflow is possible. Thanks to Dan
for pointing these out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122790
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Bill Wendling [Mon, 3 Jan 2011 23:59:05 +0000 (23:59 +0000)]
Formatting changes. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122789
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Owen Anderson [Mon, 3 Jan 2011 23:51:56 +0000 (23:51 +0000)]
Fix comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122788
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Owen Anderson [Mon, 3 Jan 2011 23:51:43 +0000 (23:51 +0000)]
Use the new addEscapingValue callback to update GlobalsModRef when GVN adds PHIs of GEPs. For the moment,
have GlobalsModRef handle this conservatively by simply removing the value from its maps.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122787
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Evan Cheng [Mon, 3 Jan 2011 23:47:14 +0000 (23:47 +0000)]
Convert MC tests to .s so codegen changes won't break them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122786
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Chris Lattner [Mon, 3 Jan 2011 23:38:13 +0000 (23:38 +0000)]
Duncan deftly points out that readnone functions aren't
invalidated by stores, so they can be handled as 'simple'
operations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122785
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Evan Cheng [Mon, 3 Jan 2011 22:53:22 +0000 (22:53 +0000)]
Use pushq / popq instead of subq $8, %rsp / addq $8, %rsp to adjust stack in
prologue and epilogue if the adjustment is 8. Similarly, use pushl / popl if
the adjustment is 4 in 32-bit mode.
In the epilogue, takes care to pop to a caller-saved register that's not live
at the exit (either return or tailcall instruction).
rdar://
8771137
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122783
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David Greene [Mon, 3 Jan 2011 21:55:08 +0000 (21:55 +0000)]
Don't pattern match "clang-" as it may be part of a tool name with a
triple suffix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122779
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Wesley Peck [Mon, 3 Jan 2011 21:40:26 +0000 (21:40 +0000)]
Fix more stack layout issues in the MBlaze backend.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122778
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Owen Anderson [Mon, 3 Jan 2011 21:38:41 +0000 (21:38 +0000)]
Stub out a new updating interface to AliasAnalysis, allowing stateful analyses to be informed when
a pointer value has potentially become escaping. Implementations can choose to either fall back to
conservative responses for that value, or may recompute their analysis to accomodate the change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122777
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Owen Anderson [Mon, 3 Jan 2011 21:08:22 +0000 (21:08 +0000)]
We can count properly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122773
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Chris Lattner [Mon, 3 Jan 2011 21:03:33 +0000 (21:03 +0000)]
fix rdar://
8813415 - a miscompilation of 164.gzip that loop-idiom
exposed. It turns out to be a latent bug in basicaa, scary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122772
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Chris Lattner [Mon, 3 Jan 2011 21:01:26 +0000 (21:01 +0000)]
filecheckize
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122771
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Oscar Fuentes [Mon, 3 Jan 2011 20:01:32 +0000 (20:01 +0000)]
TableGen.cmake: sometimes the .td file is not in the current directory
(clang/include/clang/Basic/StmtNodes.td, for instance, is tablegenned
from clang/include/clang/AST/CMakeLists.txt) so it is not contained on
the list of all .td files on the current source directory which is
used as the DEPENDS of the custom command. We must add the .td file to
the DEPENDS list of the custom command. Otherwise some .inc files are
not regenerated when the corresponding .td file changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122768
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Owen Anderson [Mon, 3 Jan 2011 19:00:11 +0000 (19:00 +0000)]
Simplify GVN's value expression structure, allowing the elimination of a lot of
almost-but-not-quite-identical code. No intended functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122760
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Chris Lattner [Mon, 3 Jan 2011 18:43:03 +0000 (18:43 +0000)]
stength reduce my previous patch a bit. The only instructions
that are allowed to have metadata operands are intrinsic calls,
and the only ones that take metadata currently return void.
Just reject all void instructions, which should not be value
numbered anyway. To future proof things, add an assert to the
getHashValue impl for calls to check that metadata operands
aren't present.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122759
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Chris Lattner [Mon, 3 Jan 2011 18:28:15 +0000 (18:28 +0000)]
fix PR8895: metadata operands don't have a strong use of their
nested values, so they can change and drop to null, which can
change the hash and cause havok.
It turns out that it isn't a good idea to value number stuff
with metadata operands anyway, so... don't.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122758
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David Greene [Mon, 3 Jan 2011 17:30:25 +0000 (17:30 +0000)]
Reapply 122341 to fix PR8199 now that clang changes are in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122754
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Oscar Fuentes [Mon, 3 Jan 2011 16:59:52 +0000 (16:59 +0000)]
LLVMProcessSources: add .def files along with .h files to targets for
the benefit of project-based generators (VS, XCode, etc).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122749
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Duncan Sands [Mon, 3 Jan 2011 10:50:04 +0000 (10:50 +0000)]
Speed up instsimplify by about 10-15% by not bothering to retry
InstructionSimplify on instructions that didn't change since the
last time round the loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122745
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Evan Cheng [Mon, 3 Jan 2011 07:53:18 +0000 (07:53 +0000)]
Undo what looks like accidental removal of an instcombine pass in r122740.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122743
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Cameron Zwarich [Mon, 3 Jan 2011 06:33:01 +0000 (06:33 +0000)]
Switch a worklist in CodeGenPrepare to SmallVector and increase the inline
capacity on the Visited SmallPtrSet. On 403.gcc, this is about a 4.5% speedup of
CodeGenPrepare time (which itself is 10% of time spent in the backend).
This is progress towards PR8889.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122741
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Chris Lattner [Mon, 3 Jan 2011 06:19:09 +0000 (06:19 +0000)]
Turn on earlycse by default. This seems to be a small performance
improvement in the generated code, and speeds up 'opt -std-compile-opts'
compile time on 176.gcc from 24.84s to 23.2s (about 7%).
This also resolves a specific code quality issue in rdar://
7352081 which
was generating poor code for:
int t(int a, int b) {
if (a & b & 1)
return a & b;
return 3;
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122740
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Nick Lewycky [Mon, 3 Jan 2011 06:16:07 +0000 (06:16 +0000)]
Further expand what a call graph pass may do.
The rationale is that after analyzing a function in the SCC, we may want to
modify it in a way that requires us to update its uses (f.e. to replace the
call with a constant) or its users (f.e. to call it with fewer arguments).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122739
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Chris Lattner [Mon, 3 Jan 2011 04:17:24 +0000 (04:17 +0000)]
earlycse can do trivial with-a-block dead store
elimination as well. This deletes 60 stores in 176.gcc
that largely come from bitfield code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122736
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Cameron Zwarich [Mon, 3 Jan 2011 04:07:46 +0000 (04:07 +0000)]
Use a RecyclingAllocator to allocate values for MachineCSE's ScopedHashTable for
a 28% speedup of MachineCSE time on 403.gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122735
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