Commit Graph

13547 Commits

Author SHA1 Message Date
Oscar Fuentes
111fd9ce64 Make config.h.cmake similar to config.h.in
Patch by arrowdodger!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123539 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15 13:35:37 +00:00
Nick Lewycky
786c7cd141 Teach LazyValueInfo that allocas aren't NULL. Over all of llvm-test, this saves
half a million non-local queries, each of which would otherwise have triggered a
linear scan over a basic block.

Also fix a fixme for memory intrinsics which dereference pointers. With this,
we prove that a pointer is non-null because it was dereferenced by an intrinsic
112 times in llvm-test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123533 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15 09:16:12 +00:00
Chris Lattner
bdf466c27d fix typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123519 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15 06:27:35 +00:00
Chris Lattner
4de2c76542 Fix m_Not and m_Neg to not match random ConstantInt's. Before
these would try hard to match constants by inverting the bits
and recursively matching.  There are two problems with this:
1) some patterns would match when we didn't want them to (theoretical)
2) this is insanely expensive to do, and most often pointless.

This was apparently useful in just 2 instcombine cases, which I
added code to handle explicitly.  This change speeds up 'opt'
time on 176.gcc by 1% and produces bitwise identical code.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123518 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15 05:52:27 +00:00
Chris Lattner
deaf55f698 Generalize LoadAndStorePromoter a bit and switch LICM
to use it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123501 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-15 00:12:35 +00:00
Anton Korobeynikov
3965b5e974 Add a possibility to switch between CFI directives- and table-based frame description emission. Currently all the backends use table-based stuff.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123476 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 21:58:08 +00:00
Anton Korobeynikov
9a1ef4ef36 Add CFI directives-based frame information emission. Not hooked yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123474 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 21:57:53 +00:00
Chris Lattner
a2d845a3ff Add a new LoadAndStorePromoter class, which implements the general
"promote a bunch of load and stores" logic, allowing the code to
be shared and reused.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123456 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 19:36:13 +00:00
Jay Foad
f18e4c3ab4 OperandTraits<>::Layout isn't used for anything. Remove it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123452 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 18:41:56 +00:00
Oscar Fuentes
da7e2870eb Reorder macros on config.h.cmake to easily compare it against
config.h.in.

Patch by arrowdodger!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123445 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 16:41:03 +00:00
Chris Lattner
998ef4a92d switch the second scalarrepl pass to use SSAUpdater. We run two scalarrepl passes: one
early in the cleanup code and one late interlaced with the inliner.  The second one is
important because inlining and other scalar optzns can unpin allocas, allowing them to 
be split up and promoted.  While important for performance, this is also relatively
rare, and we would previously force a (non-lazy) computation of DomFrontiers, which 
happened even if nothing became unpinned.

With this patch, the first pass of scalarrepl still promotes the vast bulk of allocas
in programs, but hte second pass has changed to use SSAUpdater, which is more "sparse"
and lazy.  This speeds up opt -O3 time on kimwitu++ (a c++ app) by about 1%.  The
numbers are interesting: the first pass promotes ~17500 allocas.  The second pass
promotes about 1600.  For non-C++ codes, the compile time win should be greater, 
because the second pass of scalarrepl does less.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123437 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 08:21:08 +00:00
Chris Lattner
b352d6eb49 split SROA into two passes: one that uses DomFrontiers (-scalarrepl)
and one that uses SSAUpdater (-scalarrepl-ssa)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123436 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 08:13:00 +00:00
Jay Foad
25052d8d64 Remove casts between Value** and Constant**, which won't work if a
static_cast from Constant* to Value* has to adjust the "this" pointer.
This is groundwork for PR889.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123435 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 08:07:43 +00:00
Evan Cheng
f3eb3bba16 Completed :lower16: / :upper16: support for movw / movt pairs on Darwin.
- Fixed :upper16: fix up routine. It should be shifting down the top 16 bits first.
- Added support for Thumb2 :lower16: and :upper16: fix up.
- Added :upper16: and :lower16: relocation support to mach-o object writer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123424 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 02:38:49 +00:00
Owen Anderson
c5f608b49c Rather than doing early instcombine, try doing early CSE instead. This should still handle
most important simplifications, as well as resolving phase ordering issues where instcombine
would inhibit important CSE'ing opportunities, for instance on BitBench/drop3.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123418 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 00:41:11 +00:00
Duncan Sands
c43cee3fbb Move some shift transforms out of instcombine and into InstructionSimplify.
While there, I noticed that the transform "undef >>a X -> undef" was wrong.
For example if X is 2 then the top two bits must be equal, so the result can
not be anything.  I fixed this in the constant folder as well.  Also, I made
the transform for "X << undef" stronger: it now folds to undef always, even
though X might be zero.  This is in accordance with the LangRef, but I must
admit that it is fairly aggressive.  Also, I added "i32 X << 32 -> undef"
following the LangRef and the constant folder, likewise fairly aggressive.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123417 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 00:37:45 +00:00
Owen Anderson
68a659d423 Don't bother conditionalizing the use of SROA in -O1 mode. We're already running it unconditionally
later in the pipeline.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123416 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-14 00:36:40 +00:00
Tobias Grosser
21d842c353 Add single entry / single exit accessors.
Add methods for accessing the (single) entry / exit edge of a region. If no such
edge exists, null is returned.  Both accessors return the start block of the
corresponding edge. The edge can finally be formed by utilizing
Region::getEntry() or Region::getExit();

Contributed by: Andreas Simbuerger <simbuerg@fim.uni-passau.de>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123410 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13 23:18:04 +00:00
Jakob Stoklund Olesen
4f28c1c714 Teach frame lowering to ignore debug values after the terminators.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123399 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13 21:28:52 +00:00
Oscar Fuentes
006bfeba06 Add some platform tests.
Patch by arrowdodger!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123388 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13 19:17:28 +00:00
Oscar Fuentes
60b531270b Platform tests for argz_* functions.
Patch by arrowdodger!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123376 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13 15:06:32 +00:00
Evan Cheng
7597212abc Model :upper16: and :lower16: as ARM specific MCTargetExpr. This is a step
in the right direction. It eliminated some hacks and will unblock codegen
work. But it's far from being done. It doesn't reject illegal expressions,
e.g. (FOO - :lower16:BAR). It also doesn't work in Thumb2 mode at all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123369 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13 07:58:56 +00:00
Michael J. Spencer
9df536ca78 Support/Path: Deprecate PathV1::IsSymlink and replace all uses with PathV2::is_symlink.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123345 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-12 23:55:06 +00:00
Jakob Stoklund Olesen
7fd747ba24 Annotate VirtRegRewriter debug output with slot indexes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123333 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-12 22:28:48 +00:00
Jakob Stoklund Olesen
a5f1a900df Assert if anybody tries to put a slot index on a DBG_VALUE instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123323 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-12 21:27:45 +00:00
Jakob Stoklund Olesen
113328db1b Put the Dominator improvements back in. They were not the cause of bootstrap miscomparisons.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123273 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 21:23:09 +00:00
Jakob Stoklund Olesen
cbf39b5891 Speculatively revert the recent improvements to Dominators.h in an attempt to track down the gcc bootstrap miscompare.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123254 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 19:26:30 +00:00
Chris Lattner
6038a6351e some comment improvements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123243 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 17:11:59 +00:00
Jay Foad
67c619ba3e FixedNumOperandTraits and VariadicOperandTraits assumed that, given a
"this" pointer for any subclass of User, you could static_cast it to
User* and then reinterpret_cast that to Use* to get the end of the
operand list. This isn't a safe assumption in general, because the
static_cast might adjust the "this" pointer. Fixed by having these
OperandTraits classes take an extra template parameter, which is the
subclass of User. This is groundwork for PR889.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123235 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 15:07:38 +00:00
Oscar Fuentes
19823b19ba Add to the CMake build some options and platform tests supported by
the traditional build.

Patch by arrowdodger!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123233 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 12:31:54 +00:00
Chris Lattner
b5b7997fd0 Fix FoldSingleEntryPHINodes to update memdep and AA when it deletes
phi nodes.  It is called from MergeBlockIntoPredecessor which is 
called from GVN, which claims to preserve these.

I'm skeptical that this is the actual problem behind PR8954, but
this is a stab in the right direction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123222 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 08:13:40 +00:00
Michael J. Spencer
218dc3e2fe Support/Path: Deprecate PathV1::isDirectory and replace all uses with PathV2::is_directory.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123209 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 01:21:55 +00:00
Anton Korobeynikov
16c29b5f28 Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123170 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-10 12:39:04 +00:00
Jakob Stoklund Olesen
c9df025e33 Simplify a bunch of isVirtualRegister() and isPhysicalRegister() logic.
These functions not longer assert when passed 0, but simply return false instead.

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123155 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-10 02:58:51 +00:00
Michael J. Spencer
54453f2978 Support/Path: Deprecate PathV1::exists and replace all uses with PathV2::fs::exists.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123151 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-10 02:34:23 +00:00
Jakob Stoklund Olesen
b79cb79a46 Remove TargetRegisterInfo::NoRegister.
Fix the TargetRegisterInfo::NoRegister places where someone preferred
typing 'TargetRegisterInfo::NoRegister' instead of typing '0'.

Note that TableGen is already emitting xx::NoRegister in xxGenRegisterNames.inc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123140 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 23:20:48 +00:00
Jakob Stoklund Olesen
da1f1f4950 Change virtual register numbering to make more space for physical registers.
The numbering plan is now:

0           NoRegister.
[1;2^30)    Physical registers.
[2^30;2^31) Stack slots.
[2^31;2^32) Virtual registers. (With -1u and -2u used by DenseMapInfo.)

Each segment is filled from the left, so any mistaken interpretation should
quickly cause crashes.

FirstVirtualRegister has been removed. TargetRegisterInfo provides predicates
conversion functions that should be used instead of interpreting register
numbers manually.

It is now legal to pass NoRegister to isPhysicalRegister() and
isVirtualRegister(). The result is false in both cases.

It is quite rare to represent stack slots in this way, so isPhysicalRegister()
and isVirtualRegister() require that isStackSlot() be checked first if it can
possibly return true. This allows a very fast implementation of the common
predicates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123137 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 22:42:48 +00:00
Chris Lattner
992efb0378 Step #2 to improve trip count analysis for loops like this:
void f(int* begin, int* end) { std::fill(begin, end, 0); }

which turns into a != exit expression where one pointer is
strided and (thanks to step #1) known to not overflow, and 
the other is loop invariant.

The observation here is that, though the IV is strided by
4 in this case, that the IV *has* to become equal to the
end value.  It cannot "miss" the end value by stepping over
it, because if it did, the strided IV expression would
eventually wrap around.

Handle this by turning A != B into "A-B != 0" where the A-B
part is known to be NUW.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123131 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 22:26:35 +00:00
Jakob Stoklund Olesen
42e9c96392 Remove MachineRegisterInfo::getLastVirtReg(), it was giving wrong results
when no virtual registers have been allocated.

It was only used to resize IndexedMaps, so provide an IndexedMap::resize()
method such that

 Map.grow(MRI.getLastVirtReg());

can be replaced with the simpler

 Map.resize(MRI.getNumVirtRegs());

This works correctly when no virtuals are allocated, and it bypasses the to/from
index conversions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123130 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 21:58:20 +00:00
Jakob Stoklund Olesen
be97e906e0 Teach TargetRegisterInfo how to cram stack slot indexes in with the virtual and
physical register numbers.

This makes the hack used in LiveInterval official, and lets LiveInterval be
oblivious of stack slots.

The isPhysicalRegister() and isVirtualRegister() predicates don't know about
this, so when a variable may contain a stack slot, isStackSlot() should always
be tested first.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123128 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 21:17:37 +00:00
Jakob Stoklund Olesen
43a566519b Fix comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123125 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 19:45:45 +00:00
Tobias Grosser
3a723ab344 DominatorTree->print() now prints the status of the DFSNumbers correctly
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123120 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 16:00:09 +00:00
Oscar Fuentes
2c5e0b8b98 Rewrite handling of LLVM_ENABLE_PIC. It was being processed after
config.h was generated, so it had no effect on it.

Thanks to arrowdodger for pointing out this and a tentative patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123119 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 14:34:39 +00:00
Jakob Stoklund Olesen
0804ead404 Simplify LiveDebugVariables by storing MachineOperand copies locations instead
of using a Location class with the same information.

When making a copy of a MachineOperand that was already stored in a
MachineInstr, it is necessary to clear the parent pointer on the copy. Otherwise
the register use-def lists become inconsistent.

Add MachineOperand::clearParent() to do that. An alternative would be a custom
MachineOperand copy constructor that cleared ParentMI. I didn't want to do that
because of the performance impact.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123109 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 05:33:21 +00:00
Jakob Stoklund Olesen
4314268128 Replace TargetRegisterInfo::printReg with a PrintReg class that also works without a TRI instance.
Print virtual registers numbered from 0 instead of the arbitrary
FirstVirtualRegister. The first virtual register is printed as %vreg0.
TRI::NoRegister is printed as %noreg.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123107 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 03:05:53 +00:00
Jakob Stoklund Olesen
994c727b57 Use IndexedMap for MachineRegisterInfo as well. No functional change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123106 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 03:05:46 +00:00
Jakob Stoklund Olesen
c7d67f90d3 Fix VirtRegMap to use TRI::index2VirtReg and TRI::virtReg2Index instead of
depending on TRI::FirstVirtualRegister.

Also use TRI::printReg instead of printing virtual registers directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123101 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 23:11:07 +00:00
Jakob Stoklund Olesen
b421c566f5 Use an IndexedMap for LiveVariables::VirtRegInfo.
Provide MRI::getNumVirtRegs() and TRI::index2VirtReg() functions to allow
iteration over virtual registers without depending on the representation of
virtual register numbers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123098 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 23:10:57 +00:00
Jakob Stoklund Olesen
56e4d89642 Do not talk about TargetRegisterInfo::FirstVirtualRegister.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123097 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 23:10:53 +00:00
Jakob Stoklund Olesen
358de24dc1 Use an IndexedMap for LiveOutRegInfo to hide its dependence on TargetRegisterInfo::FirstVirtualRegister.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123096 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 23:10:50 +00:00