a62b01dc37
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.
llvm-svn: 122805
2011-01-04 07:27:30 +00:00
82e8332a22
Eliminate repeated allocation of a per-BB DenseMap for a 4.6% reduction of time
...
spent in StrongPHIElimination on 403.gcc.
llvm-svn: 122803
2011-01-04 06:42:27 +00:00
f4e13699e7
Avoid finding loop back edges when we are not splitting critical edges in
...
CodeGenPrepare (which is the default behavior).
llvm-svn: 122801
2011-01-04 04:43:31 +00:00
2e28697c60
Clean up a funky pass registration that got passed over when I got rid of static constructors.
...
llvm-svn: 122795
2011-01-04 00:55:21 +00:00
163a24420a
Fix the ARM IIC_iCMPsi itinerary and add an important assert.
...
llvm-svn: 122794
2011-01-04 00:32:57 +00:00
e924969380
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.
llvm-svn: 122791
2011-01-04 00:12:46 +00:00
0ba473c218
use the very-handy getTruncateOrZeroExtend helper function, and
...
stop setting NSW: signed overflow is possible. Thanks to Dan
for pointing these out.
llvm-svn: 122790
2011-01-04 00:06:55 +00:00
4466e981f9
Formatting changes. No functionality change.
...
llvm-svn: 122789
2011-01-03 23:59:05 +00:00
0839d3930a
Fix comment.
...
llvm-svn: 122788
2011-01-03 23:51:56 +00:00
d62d37225a
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.
llvm-svn: 122787
2011-01-03 23:51:43 +00:00
bde6ec1db6
Duncan deftly points out that readnone functions aren't
...
invalidated by stores, so they can be handled as 'simple'
operations.
llvm-svn: 122785
2011-01-03 23:38:13 +00:00
65089fc6c7
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
llvm-svn: 122783
2011-01-03 22:53:22 +00:00
6941044c72
Fix more stack layout issues in the MBlaze backend.
...
llvm-svn: 122778
2011-01-03 21:40:26 +00:00
b6e4ff0d85
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.
llvm-svn: 122777
2011-01-03 21:38:41 +00:00
16e42128c2
fix rdar://8813415 - a miscompilation of 164.gzip that loop-idiom
...
exposed. It turns out to be a latent bug in basicaa, scary.
llvm-svn: 122772
2011-01-03 21:03:33 +00:00
3a33d0cc4a
Simplify GVN's value expression structure, allowing the elimination of a lot of
...
almost-but-not-quite-identical code. No intended functionality change.
llvm-svn: 122760
2011-01-03 19:00:11 +00:00
16ca19ffc5
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.
llvm-svn: 122759
2011-01-03 18:43:03 +00:00
142f1cd251
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.
llvm-svn: 122758
2011-01-03 18:28:15 +00:00
697de77339
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.
llvm-svn: 122745
2011-01-03 10:50:04 +00:00
43cecb1200
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.
llvm-svn: 122741
2011-01-03 06:33:01 +00:00
9e5e9ed79a
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.
llvm-svn: 122736
2011-01-03 04:17:24 +00:00
18f164f7c9
Use a RecyclingAllocator to allocate values for MachineCSE's ScopedHashTable for
...
a 28% speedup of MachineCSE time on 403.gcc.
llvm-svn: 122735
2011-01-03 04:07:46 +00:00
4b9a525742
switch the load table to use a recycling bump pointer allocator,
...
speeding earlycse up by 6%.
llvm-svn: 122733
2011-01-03 03:53:50 +00:00
e0e32a9ef0
now that loads are in their own table, we can implement
...
store->load forwarding. This allows EarlyCSE to zap 600 more
loads from 176.gcc.
llvm-svn: 122732
2011-01-03 03:46:34 +00:00
92bb0f9f9d
split loads and calls into separate tables. Loads are now just indexed
...
by their pointer instead of using MemoryValue to wrap it.
llvm-svn: 122731
2011-01-03 03:41:27 +00:00
4cb365414f
various cleanups, no functionality change.
...
llvm-svn: 122729
2011-01-03 03:28:23 +00:00
0f87ca7733
Add spliceFunction to the CallGraph interface. This allows users to efficiently
...
update a callGraph when performing the common operation of splicing the body to
a new function and updating all callers (such as via RAUW).
No users yet, though this is intended for DeadArgumentElimination as part of
PR8887.
llvm-svn: 122728
2011-01-03 03:19:35 +00:00
b9a8efc960
Teach EarlyCSE to do trivial CSE of loads and read-only calls.
...
On 176.gcc, this catches 13090 loads and calls, and increases the
number of simple instructions CSE'd from 29658 to 36208.
llvm-svn: 122727
2011-01-03 03:18:43 +00:00
79d83067ee
rename InstValue to SimpleValue, add some comments.
...
llvm-svn: 122725
2011-01-03 02:20:48 +00:00
edb5bcdde5
CMake: Add missing source file.
...
llvm-svn: 122724
2011-01-03 02:13:05 +00:00
d815f69b30
Allocate nodes for the scoped hash table from a recyling bump pointer
...
allocator. This speeds up early cse by about 20%
llvm-svn: 122723
2011-01-03 01:42:46 +00:00
02a9776b64
reduce redundancy in the hashing code and other misc cleanups.
...
llvm-svn: 122720
2011-01-03 01:10:08 +00:00
cab9a0abab
Add a new loop-instsimplify pass, with the intention of replacing the instance
...
of instcombine that is currently in the middle of the loop pass pipeline. This
commit only checks in the pass; it will hopefully be enabled by default later.
llvm-svn: 122719
2011-01-03 00:25:16 +00:00
0844c76f9a
fix some pastos
...
llvm-svn: 122718
2011-01-02 23:29:58 +00:00
8fac5db251
add DEBUG and -stats output to earlycse.
...
Teach it to CSE the rest of the non-side-effecting instructions.
llvm-svn: 122716
2011-01-02 23:19:45 +00:00
18ae5436b1
Enhance earlycse to do CSE of casts, instsimplify and die.
...
Add a testcase.
llvm-svn: 122715
2011-01-02 23:04:14 +00:00
bf0aa927cc
split dom frontier handling stuff out to its own DominanceFrontier header,
...
so that Dominators.h is *just* domtree. Also prune #includes a bit.
llvm-svn: 122714
2011-01-02 22:09:33 +00:00
704541bb23
sketch out a new early cse pass. No functionality yet.
...
llvm-svn: 122713
2011-01-02 21:47:05 +00:00
9c69406f2b
fix a miscompilation of tramp3d-v4: when forming a memcpy, we have to make
...
sure that the loop we're promoting into a memcpy doesn't mutate the input
of the memcpy. Before we were just checking that the dest of the memcpy
wasn't mod/ref'd by the loop.
llvm-svn: 122712
2011-01-02 21:14:18 +00:00
5702a43c09
If a loop iterates exactly once (has backedge count = 0) then don't
...
mess with it. We'd rather peel/unroll it than convert all of its
stores into memsets.
llvm-svn: 122711
2011-01-02 20:24:21 +00:00
25e6e06e42
Try to reuse the value when lowering memset.
...
This allows us to compile:
void test(char *s, int a) {
__builtin_memset(s, a, 15);
}
into 1 mul + 3 stores instead of 3 muls + 3 stores.
llvm-svn: 122710
2011-01-02 19:57:05 +00:00
2fdea4c8f1
Lower the i8 extension in memset to a multiply instead of a potentially long series of shifts and ors.
...
We could implement a DAGCombine to turn x * 0x0101 back into logic operations
on targets that doesn't support the multiply or it is slow (p4) if someone cares
enough.
Example code:
void test(char *s, int a) {
__builtin_memset(s, a, 4);
}
before:
_test: ## @test
movzbl 8(%esp), %eax
movl %eax, %ecx
shll $8, %ecx
orl %eax, %ecx
movl %ecx, %eax
shll $16, %eax
orl %ecx, %eax
movl 4(%esp), %ecx
movl %eax, 4(%ecx)
movl %eax, (%ecx)
ret
after:
_test: ## @test
movzbl 8(%esp), %eax
imull $16843009, %eax, %eax ## imm = 0x1010101
movl 4(%esp), %ecx
movl %eax, 4(%ecx)
movl %eax, (%ecx)
ret
llvm-svn: 122707
2011-01-02 19:44:58 +00:00
68b7bb95d4
A workaround for a bug in cmake 2.8.3 diagnosed on PR 8885.
...
llvm-svn: 122706
2011-01-02 19:32:31 +00:00
5361b84184
Also remove functions that use complex constant expressions in terms of
...
another function.
llvm-svn: 122705
2011-01-02 19:16:44 +00:00
8455b6e45e
enhance loop idiom recognition to scan *all* unconditionally executed
...
blocks in a loop, instead of just the header block. This makes it more
aggressive, able to handle Duncan's Ada examples.
llvm-svn: 122704
2011-01-02 19:01:03 +00:00
0cdc6f62a5
make inSubLoop much more efficient.
...
llvm-svn: 122703
2011-01-02 18:53:08 +00:00
27497ece96
rip out isExitBlockDominatedByBlockInLoop, calling DomTree::dominates instead.
...
isExitBlockDominatedByBlockInLoop is a relic of the days when domtree was
*just* a tree and didn't have DFS numbers. Checking DFS numbers is faster
and easier than "limiting the search of the tree".
llvm-svn: 122702
2011-01-02 18:45:39 +00:00
0469e01c02
add a list of opportunities for future improvement.
...
llvm-svn: 122701
2011-01-02 18:32:09 +00:00
51415d26f1
update a bunch of entries.
...
llvm-svn: 122700
2011-01-02 18:31:38 +00:00
64f1c0dcda
Fix PR8702 by not having LoopSimplify claim to preserve LCSSA form. As described
...
in the PR, the pass could break LCSSA form when inserting preheaders. It probably
would be easy enough to fix this, but since currently we always go into LCSSA form
after running this pass, doing so is not urgent.
llvm-svn: 122695
2011-01-02 13:38:21 +00:00
ddf58010bd
Allow loop-idiom to run on multiple BB loops, but still only scan the loop
...
header for now for memset/memcpy opportunities. It turns out that loop-rotate
is successfully rotating loops, but *DOESN'T MERGE THE BLOCKS*, turning "for
loops" into 2 basic block loops that loop-idiom was ignoring.
With this fix, we form many *many* more memcpy and memsets than before, including
on the "history" loops in the viterbi benchmark, which look like this:
for (j=0; j<MAX_history; ++j) {
history_new[i][j+1] = history[2*i][j];
}
Transforming these loops into memcpy's speeds up the viterbi benchmark from
11.98s to 3.55s on my machine. Woo.
llvm-svn: 122685
2011-01-02 07:58:36 +00:00
5b5a043d82
remove debugging code.
...
llvm-svn: 122683
2011-01-02 07:37:13 +00:00
12f91befce
add some -stats output.
...
llvm-svn: 122682
2011-01-02 07:36:44 +00:00
679572e584
improve loop rotation to use CodeMetrics to analyze the
...
size of a loop header instead of its own code size estimator.
This allows it to handle bitcasts etc more precisely.
llvm-svn: 122681
2011-01-02 07:35:53 +00:00
85b6d81d41
teach loop idiom recognition to form memcpy's from simple loops.
...
llvm-svn: 122678
2011-01-02 03:37:56 +00:00
4e250c8245
Remove functions from the FnSet when one of their callee's is being merged. This
...
maintains the guarantee that the DenseSet expects two elements it contains to
not go from inequal to equal under its nose.
As a side-effect, this also lets us switch from iterating to a fixed-point to
actually maintaining a work queue of functions to look at again, and we don't
add thunks to our work queue so we don't need to detect and ignore them.
llvm-svn: 122677
2011-01-02 02:46:33 +00:00
6c3fc0a52d
a missed __builtin_object_size case.
...
llvm-svn: 122676
2011-01-01 22:57:31 +00:00
e5d5a41a58
various updates.
...
llvm-svn: 122675
2011-01-01 22:52:11 +00:00
1903c42b97
fix a globalopt crash on two Adobe-C++ testcases that the recent
...
loop idiom pass exposed.
llvm-svn: 122674
2011-01-01 22:31:46 +00:00
d606e54757
Add support for the 'H' modifier.
...
llvm-svn: 122667
2011-01-01 20:58:46 +00:00
62acecd7e1
Model operand restrictions of mul-like instructions on ARMv5 via
...
earlyclobber stuff. This should fix PRs 2313 and 8157.
Unfortunately, no testcase, since it'd be dependent on register
assignments.
llvm-svn: 122663
2011-01-01 20:38:38 +00:00
a3514441e0
add a validity check that was missed, fixing a crash on the
...
new testcase.
llvm-svn: 122662
2011-01-01 20:12:04 +00:00
772749aea1
Revert commit 122654 at the request of Chris, who reckons that instsimplify
...
is the wrong hammer for this nail, and is probably right.
llvm-svn: 122661
2011-01-01 20:08:02 +00:00
91a4435875
improve validity check to handle constant-trip-count loops more
...
aggressively. In practice, this doesn't help anything though,
see the todo.
llvm-svn: 122660
2011-01-01 19:54:22 +00:00
8b3baf6d75
implement the "no aliasing accesses in loop" safety check. This pass
...
should be correct now.
llvm-svn: 122659
2011-01-01 19:39:01 +00:00
3686473578
Fix PR8878.
...
llvm-svn: 122658
2011-01-01 19:05:35 +00:00
e3c539581c
Fix a README item by having InstructionSimplify do a mild form of value
...
numbering, in which it considers (for example) "%a = add i32 %x, %y" and
"%b = add i32 %x, %y" to be equal because the operands are equal and the
result of the instructions only depends on the values of the operands.
This has almost no effect (it removes 4 instructions from gcc-as-one-file),
and perhaps slows down compilation: I measured a 0.4% slowdown on the large
gcc-as-one-file testcase, but it wasn't statistically significant.
llvm-svn: 122654
2011-01-01 16:12:09 +00:00
5451fc9195
ptx: remove reg-reg addressing mode and st.const
...
llvm-svn: 122653
2011-01-01 11:58:58 +00:00
15e8d2c5e7
ptx: add store instruction
...
llvm-svn: 122652
2011-01-01 10:50:37 +00:00
a8eb60436b
Add to the list of cmake files the object file, not the asm file. This
...
is necessary for executing the custom command that runs the
assember. Fixes PR8877.
llvm-svn: 122649
2010-12-31 20:15:37 +00:00
2c440fa403
Simplify this pass by using a depth-first iterator to ensure that all
...
operands are visited before the instructions themselves.
llvm-svn: 122647
2010-12-31 17:49:05 +00:00
6cc7126ed9
Zap dead instructions harder.
...
llvm-svn: 122645
2010-12-31 16:17:54 +00:00
570dd787a6
Make a bunch of symbols internal.
...
llvm-svn: 122642
2010-12-30 22:34:44 +00:00
ee0432ce08
Add another non-commutable instruction that gas accepts commuted forms for.
...
Fixes PR8861.
llvm-svn: 122641
2010-12-30 22:10:49 +00:00
3ee0501338
ptx: add state spaces
...
llvm-svn: 122638
2010-12-30 10:41:27 +00:00
e240995e41
include the module identifier when emitting this warning, PR8865.
...
llvm-svn: 122637
2010-12-30 02:49:45 +00:00
1556522a34
print the right string, thanks for Frits for noticing.
...
llvm-svn: 122636
2010-12-30 01:07:20 +00:00
2f6dc10ccc
Use getVRegDef() instead of def_iterator. This leads to fewer defs being added
...
with 2-address instructions, for about a 3.5% speedup of StrongPHIElimination on
403.gcc.
llvm-svn: 122635
2010-12-30 00:42:23 +00:00
bd530a8e83
improve warning message to at least say what the triples are.
...
llvm-svn: 122632
2010-12-29 22:41:18 +00:00
1f289afc25
Fix stack layout error in MBlaze backend.
...
llvm-svn: 122631
2010-12-29 19:46:28 +00:00
ab14a6f174
MC/Mach-O/Thumb: Set the thumb bit in the symbol table.
...
llvm-svn: 122630
2010-12-29 14:14:06 +00:00
329cd49ce6
None of the other pass names in CodeGen have terminating periods.
...
llvm-svn: 122628
2010-12-29 11:49:10 +00:00
0507f44669
Instead of processing every instruction when splitting interferences, only
...
process those instructions that define phi sources. This is a 47% speedup of
StrongPHIElimination compile time on 403.gcc.
llvm-svn: 122627
2010-12-29 11:00:09 +00:00
0a09160e51
SPARC backend fix: correctly passing arguments through stack
...
llvm-svn: 122626
2010-12-29 05:37:15 +00:00
bfef075140
Add a missing word to a comment.
...
llvm-svn: 122625
2010-12-29 04:42:39 +00:00
46a5b05207
Correctly encode pcrel|indirect.
...
llvm-svn: 122624
2010-12-29 04:31:26 +00:00
de8fda8908
CMake: Add disabling optimization on MSVC8 and MSVC10 as workaround for some files in Target/ARM and Target/X86.
...
llvm-svn: 122623
2010-12-29 03:59:27 +00:00
458fd305d4
Add text explaining an assertion.
...
llvm-svn: 122617
2010-12-29 03:52:51 +00:00
2ae93b2c9c
Remove second return.
...
llvm-svn: 122616
2010-12-29 02:42:33 +00:00
563301dfdb
Fix bug when trying to output uint16_t or uint32_t.
...
llvm-svn: 122615
2010-12-29 02:30:49 +00:00
290d71671e
Implement cfi_def_cfa. Also don't convert to dwarf reg numbers twice. Looks
...
like 6 is a fixed point of that and so the previous tests were OK :-)
llvm-svn: 122614
2010-12-29 01:42:56 +00:00
1be1fe033c
fix PR8867: a crash handling fp128. Thanks to Nick for the testcase.
...
llvm-svn: 122613
2010-12-29 01:33:36 +00:00
426e68f793
Implement cfi_def_cfa_register.
...
llvm-svn: 122612
2010-12-29 00:26:06 +00:00
86d347dd31
Initial .cfi_offset implementation.
...
llvm-svn: 122611
2010-12-29 00:09:59 +00:00
6fe33fdd63
Simplify some code in MachineVerifier that was doing the correct thing, but not
...
in the most obvious way.
llvm-svn: 122610
2010-12-28 23:45:38 +00:00
6bbfb6c06c
Don't produce a "DW_CFA_advance_loc 0".
...
llvm-svn: 122609
2010-12-28 23:38:03 +00:00
146666eabb
Revert the optimization in r122596. It is correct for all current targets, but
...
it relies on assumptions that may not be true in the future.
llvm-svn: 122608
2010-12-28 23:02:56 +00:00
2f15503d5a
Multiple SPARC backend fixes: added Y register; updated select_cc, subx, subxcc defs/uses;
...
and fixed CustomInserter.
llvm-svn: 122607
2010-12-28 20:39:17 +00:00
65a699d4d0
simplify this, isBytewiseValue handles the extra check. We still
...
check for "multiple of a byte" in size to make it clear that the
>> 3 below is safe.
llvm-svn: 122604
2010-12-28 18:53:48 +00:00
102bc01900
add a note from llvmdev
...
llvm-svn: 122603
2010-12-28 18:45:02 +00:00
85d91982ca
Implement .cfi_remember_state and .cfi_restore_state.
...
llvm-svn: 122602
2010-12-28 18:36:23 +00:00
b6d52b8b64
Cast away "comparison between signed and unsigned integer" warnings.
...
llvm-svn: 122598
2010-12-28 13:52:52 +00:00
110442d8a0
Fix a signed/unsigned comparison warning.
...
llvm-svn: 122597
2010-12-28 13:05:13 +00:00
92f6e4290c
Avoid iterating every operand of an instruction in StrongPHIElimination, since
...
we are only interested in the defs when discovering interferences.
This is a 28% speedup running StrongPHIElimination on 403.gcc.
llvm-svn: 122596
2010-12-28 10:49:33 +00:00
496770debc
Pacify the compiler. BestWeight cannot in fact be used uninitialized
...
in this function, but the compiler was warning that it might be when
doing a release build.
llvm-svn: 122595
2010-12-28 10:07:15 +00:00
3784c5ea3c
Fix warning about size potentially being used uninitialized
...
when doing a release build.
llvm-svn: 122594
2010-12-28 10:02:42 +00:00
5cf10e691b
Silence gcc warning about an unused variable when doing a release build.
...
llvm-svn: 122593
2010-12-28 09:41:15 +00:00
736a35d9ab
Relax address updates in the eh_frame section.
...
llvm-svn: 122591
2010-12-28 05:39:27 +00:00
a75b87b55a
Start adding basic support for emitting the call frame instructions.
...
llvm-svn: 122590
2010-12-28 04:15:37 +00:00
c581fe7e81
Support/Path: Deprecate Path::hasMagicNumber and replace all uses with fs::has_magic.
...
llvm-svn: 122589
2010-12-28 01:49:21 +00:00
848f46bb84
Support/PathV2: Implement has_magic.
...
llvm-svn: 122587
2010-12-28 01:49:01 +00:00
5e5cfbe871
Change an assertion to assert what the code actually relies upon.
...
llvm-svn: 122586
2010-12-27 22:08:42 +00:00
cb18bfa3d2
fix some issues Frits noticed, add AliasAnalysis as a dependency
...
llvm-svn: 122585
2010-12-27 18:39:08 +00:00
1de2dd0e5e
Add support for .cfi_lsda.
...
llvm-svn: 122584
2010-12-27 15:56:22 +00:00
a895c69431
MC/Mach-O/Thumb: Select appropriate relocation types for Thumb.
...
llvm-svn: 122583
2010-12-27 14:49:49 +00:00
25d046ce68
Land a first cut at StrongPHIElimination. There are only 5 new test failures
...
when running without the verifier, and I have not yet checked them to see if
the new results are still correct. There are more verifier failures, but they
all seem to be additional occurrences of verifier failures that occur with the
existing PHIElimination pass. There are a few obvious issues with the code:
1) It doesn't properly update the register equivalence classes during copy
insertion, and instead recomputes them before merging live intervals and
renaming registers. I wanted to keep this first patch simple for debugging
purposes, but it shouldn't be very hard to do this.
2) It doesn't mix the renaming and live interval merging with the copy insertion
process, which leads to a lot of virtual register churn. Virtual registers and
live intervals are created, only to later be merged into others. The code should
be smarter and only create a new virtual register if there is no existing
register in the same congruence class.
3) In one place the code uses a DenseMap per basic block, which is unnecessary
heap allocation. There should be an inline storage version of DenseMap.
I did a quick compile-time test of running llc on 403.gcc with and without
StrongPHIElimination. It is slightly slower with StrongPHIElimination, because
the small decrease in the coalescer runtime can't beat the increase in phi
elimination runtime. Perhaps fixing the above performance issues will narrow
the gap.
I also haven't yet run any tests of the quality of the generated code.
llvm-svn: 122582
2010-12-27 10:08:19 +00:00
b95bfe1667
Add knowledge of phi-def and phi-kill valnos to MachineVerifier's predecessor
...
valno verification. The "Different value live out of predecessor" check is
incorrect in the case of phi-def valnos, so just skip that check for phi-def
valnos and instead check that all of the valnos for predecessors have phi-kill.
Fixes PR8863.
llvm-svn: 122581
2010-12-27 05:17:23 +00:00
9e590024f6
Support/PathV1: Deprecate GetRootDirectory.
...
llvm-svn: 122580
2010-12-27 03:21:41 +00:00
8fc59a682f
Handle reloc_riprel_4byte_movq_load. Should make the bots happy.
...
llvm-svn: 122579
2010-12-27 02:03:24 +00:00
2ac8355ecd
Add support for the same encodings of the personality function that gnu as
...
supports.
llvm-svn: 122577
2010-12-27 00:36:05 +00:00
84bd73c527
BuildLibCalls: Nuke EmitMemCpy, EmitMemMove and EmitMemSet. They are dead and superseded by IRBuilder.
...
llvm-svn: 122576
2010-12-27 00:25:32 +00:00
7cba269dfb
SimplifyLibCalls: Use IRBuilder to simplify code.
...
llvm-svn: 122575
2010-12-27 00:16:46 +00:00
b9fe685b9a
have loop-idiom nuke instructions that feed stores that get removed.
...
llvm-svn: 122574
2010-12-27 00:03:23 +00:00
29e14edc8d
implement enough of the memset inference algorithm to recognize and insert
...
memsets. This is still missing one important validity check, but this is enough
to compile stuff like this:
void test0(std::vector<char> &X) {
for (std::vector<char>::iterator I = X.begin(), E = X.end(); I != E; ++I)
*I = 0;
}
void test1(std::vector<int> &X) {
for (long i = 0, e = X.size(); i != e; ++i)
X[i] = 0x01010101;
}
With:
$ clang t.cpp -S -o - -O2 -emit-llvm | opt -loop-idiom | opt -O3 | llc
to:
__Z5test0RSt6vectorIcSaIcEE: ## @_Z5test0RSt6vectorIcSaIcEE
## BB#0: ## %entry
subq $8, %rsp
movq (%rdi), %rax
movq 8(%rdi), %rsi
cmpq %rsi, %rax
je LBB0_2
## BB#1: ## %bb.nph
subq %rax, %rsi
movq %rax, %rdi
callq ___bzero
LBB0_2: ## %for.end
addq $8, %rsp
ret
...
__Z5test1RSt6vectorIiSaIiEE: ## @_Z5test1RSt6vectorIiSaIiEE
## BB#0: ## %entry
subq $8, %rsp
movq (%rdi), %rax
movq 8(%rdi), %rdx
subq %rax, %rdx
cmpq $4, %rdx
jb LBB1_2
## BB#1: ## %for.body.preheader
andq $-4, %rdx
movl $1, %esi
movq %rax, %rdi
callq _memset
LBB1_2: ## %for.end
addq $8, %rsp
ret
llvm-svn: 122573
2010-12-26 23:42:51 +00:00
6cf8d6cc6e
start using irbuilder to make mem intrinsics in a few passes.
...
llvm-svn: 122572
2010-12-26 22:57:41 +00:00
143a07cfee
add methods to IRBuilder to create memcpy/memset/memmove.
...
llvm-svn: 122571
2010-12-26 22:49:25 +00:00
54462cd730
Fix .cfi_personality on 32 bit systems.
...
llvm-svn: 122570
2010-12-26 22:47:37 +00:00
9ae2d05d45
Add support for @note. Patch by Jörg Sonnenberger.
...
llvm-svn: 122568
2010-12-26 21:30:59 +00:00
7c5f9c35d1
sketch more of this out.
...
llvm-svn: 122567
2010-12-26 20:45:45 +00:00
9141b611ad
Add basic support for .cfi_personality.
...
llvm-svn: 122566
2010-12-26 20:20:31 +00:00
9cb1035f94
move isBytewiseValue out to ValueTracking.h/cpp
...
llvm-svn: 122565
2010-12-26 20:15:01 +00:00
81ae3f299a
actually add the file...
...
llvm-svn: 122563
2010-12-26 19:39:38 +00:00
2ef535a4e4
Start of a pass for recognizing memset and memcpy idioms.
...
No functionality yet.
llvm-svn: 122562
2010-12-26 19:32:44 +00:00
30342fb1fd
Simplify code.
...
llvm-svn: 122561
2010-12-26 15:23:45 +00:00
f9e0a56b94
fix some sort of weird pasto
...
llvm-svn: 122560
2010-12-26 12:05:11 +00:00
424de3498b
add a note
...
llvm-svn: 122559
2010-12-26 03:53:31 +00:00
03a102bff3
Generalize a previous change, fixing PR8855 - an valid large immediate
...
rejected by the mc assembler.
llvm-svn: 122557
2010-12-25 21:36:35 +00:00
d729d0dcdb
don't lose TD info
...
llvm-svn: 122556
2010-12-25 20:52:04 +00:00
20fca48341
switch the inliner alignment enforcement stuff to use the
...
getOrEnforceKnownAlignment function, which simplifies the code
and makes it stronger.
llvm-svn: 122555
2010-12-25 20:42:38 +00:00
6fcd32e7d7
Move getOrEnforceKnownAlignment out of instcombine into Transforms/Utils.
...
llvm-svn: 122554
2010-12-25 20:37:57 +00:00
e13f1ead9b
Support/PathV1: Deprecate makeAbsolute and remove Unix impl because it annoys people.
...
llvm-svn: 122553
2010-12-25 20:10:11 +00:00
b90b2f0635
Fix a thinko pointed out by Frits van Bommel: looking through global variables in isBytewiseValue is not safe.
...
llvm-svn: 122550
2010-12-24 22:23:59 +00:00
0f8abeba1d
Merge IsFixupFullyResolved and IsSymbolRefDifferenceFullyResolved. We now
...
have a single point where targets test if a relocation is needed.
llvm-svn: 122549
2010-12-24 21:22:02 +00:00
ea9152e551
MemCpyOpt: Turn memcpys from a constant into a memset if possible.
...
This allows us to compile "int cst[] = {-1, -1, -1};" into
movl $-1, 16(%rsp)
movq $-1, 8(%rsp)
instead of
movl _cst+8(%rip), %eax
movl %eax, 16(%rsp)
movq _cst(%rip), %rax
movq %rax, 8(%rsp)
llvm-svn: 122548
2010-12-24 21:17:12 +00:00
7f2bb4dcae
MC/Mach-O/ARM: Start handling some Thumb branches.
...
llvm-svn: 122547
2010-12-24 16:41:46 +00:00
5ce945ca3a
Minor cleanup related to my latest scheduler changes.
...
llvm-svn: 122545
2010-12-24 07:10:19 +00:00
c94056692a
Fix a few cases where the scheduler is not checking for phys reg copies. The scheduling node may have a NULL DAG node, yuck.
...
llvm-svn: 122544
2010-12-24 06:46:50 +00:00
10ffc2b6c2
Various bits of framework needed for precise machine-level selection
...
DAG scheduling during isel. Most new functionality is currently
guarded by -enable-sched-cycles and -enable-sched-hazard.
Added InstrItineraryData::IssueWidth field, currently derived from
ARM itineraries, but could be initialized differently on other targets.
Added ScheduleHazardRecognizer::MaxLookAhead to indicate whether it is
active, and if so how many cycles of state it holds.
Added SchedulingPriorityQueue::HasReadyFilter to allowing gating entry
into the scheduler's available queue.
ScoreboardHazardRecognizer now accesses the ScheduleDAG in order to
get information about it's SUnits, provides RecedeCycle for bottom-up
scheduling, correctly computes scoreboard depth, tracks IssueCount, and
considers potential stall cycles when checking for hazards.
ScheduleDAGRRList now models machine cycles and hazards (under
flags). It tracks MinAvailableCycle, drives the hazard recognizer and
priority queue's ready filter, manages a new PendingQueue, properly
accounts for stall cycles, etc.
llvm-svn: 122541
2010-12-24 05:03:26 +00:00
c416ba612b
whitespace
...
llvm-svn: 122539
2010-12-24 04:28:06 +00:00
ab434079d3
Simplify a check for implicit defs and remove a FIXME.
...
llvm-svn: 122537
2010-12-24 03:09:36 +00:00
Chris Lattner