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 They are dead and superseded by IRBuilder.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
fa3c6f148c
In llvm-mc parse a Hash token as a full line comment. Allows handling of
...
preprocessed .s files and matches darwin gas. rdar://8798690
Also fix a comment on the next line of AsmParser.cpp after this new code.
llvm-svn: 122531
2010-12-24 00:12:02 +00:00
ffaea0f017
Use a StringSwitch<> instead of a manually constructed string matcher.
...
llvm-svn: 122530
2010-12-24 00:03:39 +00:00
226ac14afb
When determining if we can fold (x >> C1) << C2, the bits that we need to verify are zero
...
are not the low bits of x, but the bits that WILL be the low bits after the operation completes.
llvm-svn: 122529
2010-12-23 23:56:24 +00:00
62de0fa671
Code clean up. No functionality change.
...
llvm-svn: 122528
2010-12-23 23:54:17 +00:00
545858d209
Remove dead patterns.
...
llvm-svn: 122524
2010-12-23 23:20:13 +00:00
bcfa4a945a
Recognize a few more documented register name aliases for ARM in the asm lexer.
...
llvm-svn: 122523
2010-12-23 23:19:54 +00:00
36be00ceb3
Radar 8803471: Fix expansion of ARM BCCi64 pseudo instructions.
...
If the basic block containing the BCCi64 (or BCCZi64) instruction ends with
an unconditional branch, that branch needs to be deleted before appending
the expansion of the BCCi64 to the end of the block.
llvm-svn: 122521
2010-12-23 22:45:49 +00:00
5d690d4168
It is possible for SimplifyCFG to cause PHI nodes to become redundant too late in the optimization
...
pipeline to be caught by instcombine, and it's not feasible to catch them in SimplifyCFG because the
use-lists are in an inconsistent state at the point where it could know that it need to simplify them.
Instead, have CodeGenPrepare look for trivially redundant PHIs as part of its general cleanup effort.
llvm-svn: 122516
2010-12-23 20:57:35 +00:00
2a0a3b43d7
Flag -> Glue, the ongoing saga
...
llvm-svn: 122513
2010-12-23 18:28:41 +00:00
11a33811b6
flags -> glue for selectiondag
...
llvm-svn: 122509
2010-12-23 17:24:32 +00:00
f647e95b9a
sdisel flag -> glue.
...
llvm-svn: 122507
2010-12-23 17:13:18 +00:00
dfa40f8f19
Remove/fix invalid README entries. The well thought out strcpy function doesn't return a pointer to the end of the string.
...
llvm-svn: 122496
2010-12-23 15:32:07 +00:00
b37ae33125
Remove some obsolete README items, add a new one off the top of my head.
...
llvm-svn: 122495
2010-12-23 15:07:02 +00:00
528fad91d2
Reorganize ListScheduleBottomUp in preparation for modeling machine cycles and instruction issue.
...
llvm-svn: 122491
2010-12-23 05:42:20 +00:00
a52f325c35
Converted LiveRegCycles to LiveRegGens. It's easier to work with and allows multiple nodes per cycle.
...
llvm-svn: 122474
2010-12-23 04:16:14 +00:00
12acde11cb
In CheckForLiveRegDef use TRI->getOverlaps.
...
llvm-svn: 122473
2010-12-23 03:43:21 +00:00
033efdf4d7
Fixes PR8823: add-with-overflow-128.ll
...
In the bottom-up selection DAG scheduling, handle two-address
instructions that read/write unspillable registers. Treat
the entire chain of two-address nodes as a single live range.
llvm-svn: 122472
2010-12-23 03:15:51 +00:00
18b762a946
Preserve the address space when generating bitcasts for MemTransferInst in ConvertToScalarInfo
...
llvm-svn: 122462
2010-12-23 01:41:32 +00:00
9b43f33620
Change all self assignments X=X to (void)X, so that we can turn on a
...
new gcc warning that complains on self-assignments and
self-initializations.
llvm-svn: 122458
2010-12-23 00:58:24 +00:00
8c48503baa
Trailing whitespace.
...
llvm-svn: 122456
2010-12-22 23:26:02 +00:00
1f4dfbbcb0
DAGCombine add (sext i1), X into sub X, (zext i1) if sext from i1 is illegal. The latter usually compiles into smaller code.
...
example code:
unsigned foo(unsigned x, unsigned y) {
if (x != 0) y--;
return y;
}
before:
_foo: ## @foo
cmpl $1, 4(%esp) ## encoding: [0x83,0x7c,0x24,0x04,0x01]
sbbl %eax, %eax ## encoding: [0x19,0xc0]
notl %eax ## encoding: [0xf7,0xd0]
addl 8(%esp), %eax ## encoding: [0x03,0x44,0x24,0x08]
ret ## encoding: [0xc3]
after:
_foo: ## @foo
cmpl $1, 4(%esp) ## encoding: [0x83,0x7c,0x24,0x04,0x01]
movl 8(%esp), %eax ## encoding: [0x8b,0x44,0x24,0x08]
adcl $-1, %eax ## encoding: [0x83,0xd0,0xff]
ret ## encoding: [0xc3]
llvm-svn: 122455
2010-12-22 23:17:45 +00:00
8ef5001b27
InstCombine: creating selects from -1 and 0 is fine, they combine into a sext from i1.
...
llvm-svn: 122453
2010-12-22 23:12:15 +00:00
6020ed9d99
X86: Lower a select directly to a setcc_carry if possible.
...
int test(unsigned long a, unsigned long b) { return -(a < b); }
compiles to
_test: ## @test
cmpq %rsi, %rdi ## encoding: [0x48,0x39,0xf7]
sbbl %eax, %eax ## encoding: [0x19,0xc0]
ret ## encoding: [0xc3]
instead of
_test: ## @test
xorl %ecx, %ecx ## encoding: [0x31,0xc9]
cmpq %rsi, %rdi ## encoding: [0x48,0x39,0xf7]
movl $-1, %eax ## encoding: [0xb8,0xff,0xff,0xff,0xff]
cmovael %ecx, %eax ## encoding: [0x0f,0x43,0xc1]
ret ## encoding: [0xc3]
llvm-svn: 122451
2010-12-22 23:09:28 +00:00
4124ab1255
Add r122359 back now that the bug in MCDwarfLineAddrFragment fragment has been
...
fixed.
llvm-svn: 122448
2010-12-22 22:16:24 +00:00
d91e11932c
Assert that the AddrDelta expression is really constant and wrap it in a set
...
if we have a lame assembler.
llvm-svn: 122446
2010-12-22 22:04:28 +00:00
0acb69d53c
When RegAllocGreedy decides to spill the interferences of the current register,
...
pick the victim with the lowest total spill weight.
llvm-svn: 122445
2010-12-22 22:01:30 +00:00
29836e6572
Include a shadow of the original CFG edges in the edge bundle graph.
...
llvm-svn: 122444
2010-12-22 22:01:28 +00:00
a6cd2d821a
Rename NeedsSetToChangeDiffSize to HasAggressiveSymbolFolding which is a much
...
better name and matches what is used in the MachO writer.
llvm-svn: 122443
2010-12-22 21:51:29 +00:00
ac8173cf71
MC/Mach-O/ARM: Don't try to use scattered relocs for BR24 fixups.
...
llvm-svn: 122441
2010-12-22 21:26:43 +00:00
0e14b61c0b
Revert r122359 while I debug PR8845.
...
llvm-svn: 122427
2010-12-22 19:05:49 +00:00
6b5d2519b3
Fix another conditional expression mismatched enum type warning.
...
llvm-svn: 122419
2010-12-22 18:25:55 +00:00
a45cfbd405
When determining whether the new instruction was already present in
...
the original instruction, half the cases were missed (making it not
wrong but suboptimal). Also correct a typo (A <-> B) in the second
chunk.
llvm-svn: 122414
2010-12-22 17:15:25 +00:00
45140d2efc
MC/Mach-O/ARM: We always use the SECTDIFF reloc type on ARM, which is
...
esp. important given that the LOCAL_SECTDIFF enumeration got redefined.
llvm-svn: 122412
2010-12-22 16:52:19 +00:00
11617c8666
MC/Mach-O/ARM: Clone off an ARM version of RecordScatteredRelocation until I figure out how it is supposed to work.
...
llvm-svn: 122410
2010-12-22 16:45:29 +00:00
dde72ef0c1
MC/Mach-O: Return to reporting errors if we see unexpected fixup kinds.
...
llvm-svn: 122409
2010-12-22 16:32:41 +00:00
a191cfd97e
MC/Mach-O/ARM: Recognize generic _Data_N fixup kinds.
...
llvm-svn: 122408
2010-12-22 16:32:37 +00:00
9ccf843a61
MC/Mach-O/ARM: Add enough relocation logic to get BR24 relocations.
...
llvm-svn: 122407
2010-12-22 16:19:24 +00:00
56f13732e2
MC/Mach-O/ARM: Fix thinko.
...
llvm-svn: 122406
2010-12-22 16:19:20 +00:00
50ce2f06de
Use references and simplify.
...
llvm-svn: 122405
2010-12-22 16:11:57 +00:00
73c0ae77ca
Simplify the handling of .size expressions.
...
llvm-svn: 122404
2010-12-22 16:03:00 +00:00
083132e131
MC/Mach-O/ARM: Stub out RecordARMRelocation, which is mostly a copy of
...
RecordRelocation with lots of FIXMEs.
llvm-svn: 122402
2010-12-22 13:50:05 +00:00
a63db77f2e
Simplify.
...
llvm-svn: 122401
2010-12-22 13:49:56 +00:00
1e5be3653c
MC/Mach-O: Split out RecordARMRelocation for now, it is weird enough it isn't
...
clear how to keep in the generic path (yet).
- Will revisit when it actually works.
llvm-svn: 122400
2010-12-22 13:49:43 +00:00
fbb9ac3cca
Add a generic expansion transform: A op (B op' C) -> (A op B) op' (A op C)
...
if both A op B and A op C simplify. This fires fairly often but doesn't
make that much difference. On gcc-as-one-file it removes two "and"s and
turns one branch into a select.
llvm-svn: 122399
2010-12-22 13:36:08 +00:00
aaedf8be1c
ptx: add ld instruction and test
...
llvm-svn: 122398
2010-12-22 10:38:51 +00:00
3547d2ebd8
Add some statistics, good for understanding how much more powerful
...
instcombine is compared to instsimplify.
llvm-svn: 122397
2010-12-22 09:40:51 +00:00
cafc1e60bb
Fix a bug in ReduceLoadWidth that wasn't handling extending
...
loads properly. We miscompiled the testcase into:
_test: ## @test
movl $128, (%rdi)
movzbl 1(%rdi), %eax
ret
Now we get a proper:
_test: ## @test
movl $128, (%rdi)
movsbl (%rdi), %eax
movzbl %ah, %eax
ret
This fixes PR8757.
llvm-svn: 122392
2010-12-22 08:02:57 +00:00
9a499e96eb
more cleanups, move a check for "roundedness" earlier to reject
...
unhanded cases faster and simplify code.
llvm-svn: 122391
2010-12-22 08:01:44 +00:00
222374d886
reduce indentation and improve comments, no functionality change.
...
llvm-svn: 122389
2010-12-22 07:36:50 +00:00
ff2cd2ea6c
Don't generate carry bit when loading immediate values on the Microblaze.
...
llvm-svn: 122385
2010-12-22 01:29:32 +00:00
3a3a5795c5
Add support for some of the LLVM atomic operations to the MBlaze backend.
...
llvm-svn: 122384
2010-12-22 01:15:01 +00:00
1cd1554ca0
Modeling the carry bit in the MSR register of the MicroBlaze.
...
llvm-svn: 122381
2010-12-22 00:53:07 +00:00
8143c61b91
Fix a regression introduced into the MBlaze delay slot filler.
...
llvm-svn: 122379
2010-12-22 00:22:59 +00:00
5ab8d4b5e5
Give GVN back the ability to perform simple conditional propagation on conditional branch values.
...
I still think that LVI should be handling this, but that capability is some ways off in the future,
and this matters for some significant benchmarks.
llvm-svn: 122378
2010-12-21 23:54:34 +00:00
890cb2d506
GCC objects to the two sides of a conditional expression having different enum
...
types, but they're just getting converted to unsigned anyway, so cast first
(and ask questions later).
llvm-svn: 122377
2010-12-21 23:43:23 +00:00
12470778d7
Remove dead code.
...
llvm-svn: 122371
2010-12-21 22:31:24 +00:00
fbb3ed8774
In DelayForLiveRegsBottomUp, handle instructions that read and write
...
the same physical register. Simplifies the fix from the previous
checkin r122211.
llvm-svn: 122370
2010-12-21 22:27:44 +00:00
2085a96513
whitespace
...
llvm-svn: 122368
2010-12-21 22:25:04 +00:00
a94e36bbee
Reapply 122353-122355 with fixes. 122354 was wrong;
...
the shift type was needed one place, the shift count
type another. The transform in 123555 had the same
problem.
llvm-svn: 122366
2010-12-21 21:55:50 +00:00
f6ddc4a1de
Add some x86 specific dagcombines for conditional increments.
...
(add Y, (sete X, 0)) -> cmp X, 1; adc 0, Y
(add Y, (setne X, 0)) -> cmp X, 1; sbb -1, Y
(sub (sete X, 0), Y) -> cmp X, 1; sbb 0, Y
(sub (setne X, 0), Y) -> cmp X, 1; adc -1, Y
for
unsigned foo(unsigned a, unsigned b) {
if (a == 0) b++;
return b;
}
we now get:
foo:
cmpl $1, %edi
movl %esi, %eax
adcl $0, %eax
ret
instead of:
foo:
testl %edi, %edi
sete %al
movzbl %al, %eax
addl %esi, %eax
ret
llvm-svn: 122364
2010-12-21 21:41:44 +00:00
43493c089f
GVN's Expression is not POD-like (it contains a SmallVector). Simplify code while at it.
...
llvm-svn: 122362
2010-12-21 21:30:19 +00:00
87c47499c6
Revert 122353-122355 for the moment, they broke stuff.
...
llvm-svn: 122360
2010-12-21 21:22:27 +00:00
a468ae02cb
Simplify EvaluateAsAbsolute now that EvaluateAsRelocatableImpl does all
...
the folding it can.
llvm-svn: 122359
2010-12-21 20:51:42 +00:00
6bdb49ded8
Don't relax org or align. They change size as the relaxation happens, but they
...
are not actually relaxed. For example, a section with only alignments will never
needs relaxation.
llvm-svn: 122356
2010-12-21 20:35:18 +00:00
caf42aa6a4
Add a new transform to DAGCombiner.
...
llvm-svn: 122355
2010-12-21 20:10:51 +00:00
fa5dc82fda
Get the type of a shift from the shift, not from its shift
...
count operand. These should be the same but apparently are
not always, and this is cleaner anyway. This improves the
code in an existing test.
llvm-svn: 122354
2010-12-21 20:06:19 +00:00
d64931df77
Shift by the word size is invalid IR; don't create it.
...
llvm-svn: 122353
2010-12-21 20:00:06 +00:00
2a7ff99979
fix some typos
...
llvm-svn: 122349
2010-12-21 18:05:22 +00:00
83cce8e7ab
Fix indentation, add comment.
...
llvm-svn: 122345
2010-12-21 17:16:58 +00:00
3b8af41a3e
Visit instructions deterministically. Use a FIFO so as to approximately
...
visit instructions before their uses, since InstructionSimplify does a
better job in that case. All this prompted by Frits van Bommel.
llvm-svn: 122343
2010-12-21 17:08:55 +00:00
8c5bfcaa29
Missing logic for nested CALLSEQ_START/END.
...
llvm-svn: 122342
2010-12-21 17:07:24 +00:00
e7cbb64ec0
If an instruction simplifies, try again to simplify any uses of it. This is
...
not very important since the pass is only used for testing, but it does make
it more realistic. Suggested by Frits van Bommel.
llvm-svn: 122336
2010-12-21 16:12:03 +00:00
ff78eda678
MC/Mach-O: Shuffle enums a bit to make it harder to inadvertently use the wrong
...
type.
llvm-svn: 122334
2010-12-21 15:26:45 +00:00
fecc642224
While I don't think any later transforms can fire, it seems cleaner to
...
not assume this (for example in case more transforms get added below
it). Suggested by Frits van Bommel.
llvm-svn: 122332
2010-12-21 15:03:43 +00:00
5def0d6791
Fix inverted condition noticed by Frits van Bommel.
...
llvm-svn: 122331
2010-12-21 14:48:48 +00:00
d0eb6d39f8
Pull a few more simplifications out of instcombine (there are still
...
plenty left though!), in particular for multiplication.
llvm-svn: 122330
2010-12-21 14:00:22 +00:00
ee3ec6eb94
Teach InstructionSimplify about distributive laws. These transforms fire
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quite often, but don't make much difference in practice presumably because
instcombine also knows them and more.
llvm-svn: 122328
2010-12-21 13:32:22 +00:00
f64e690c4f
Move checking of the recursion limit into the various Thread methods.
...
No functionality change.
llvm-svn: 122327
2010-12-21 09:09:15 +00:00
6c7a52cf80
Add generic simplification of associative operations, generalizing
...
a couple of existing transforms. This fires surprisingly often, for
example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well
as various "and" simplifications (usually with a phi node operand).
Most of the time this doesn't make a real difference since the same
thing would have been done elsewhere anyway, eg: by instcombine, but
there are a few places where this results in simplifications that we
were not doing before.
llvm-svn: 122326
2010-12-21 08:49:00 +00:00
79ebc7186e
Incremental progress towards a new implementation of StrongPHIElimination. Most
...
of the problems with my last attempt were in the updating of LiveIntervals
rather than the coalescing itself. Therefore, I decided to get that right first
by essentially reimplementing the existing PHIElimination using LiveIntervals.
It works correctly, with only a few tests failing (which may not be legitimate
failures) and no new verifier failures (at least as far as I can tell, I didn't
count the number per file).
llvm-svn: 122321
2010-12-21 06:54:43 +00:00
1a20c2aedd
Add ARM-specific DAG combining to cast i64 vector element load/stores to f64.
...
Type legalization splits up i64 values into pairs of i32 values, which leads
to poor quality code when inserting or extracting i64 vector elements.
If the vector element is loaded or stored, it can be treated as an f64 value
and loaded or stored directly from a VPR register. Use the pre-legalization
DAG combiner to cast those vector elements to f64 types so that the type
legalizer won't mess them up. Radar 8755338.
llvm-svn: 122319
2010-12-21 06:43:19 +00:00
98d93c5294
Layout one section until no relaxations are done and then move to the next
...
section.
This helps because in practice sections form a dag with debug sections pointing
to text sections. Finishing up the text sections first makes the debug section
relaxation trivial.
llvm-svn: 122314
2010-12-21 04:22:09 +00:00
c874f6c9ff
Arm and thumb call instructions are also in different orders.
...
Fixes rdar://8782223
llvm-svn: 122313
2010-12-21 03:50:43 +00:00
3e5fbd74ed
rename MVT::Flag to MVT::Glue. "Flag" is a terrible name for
...
something that just glues two nodes together, even if it is
sometimes used for flags.
llvm-svn: 122310
2010-12-21 02:38:05 +00:00
6df5ff8ce6
If we're not using reg+reg offset we're using reg+imm, set the opcode
...
to be the one we want to use. bugpoint reduced testcase is a little large,
I'll see if I can simplify it down more.
Fixes part of rdar://8782207
llvm-svn: 122307
2010-12-21 02:12:07 +00:00
17f906be96
improve "cannot yet select" errors a trivial amount: now
...
they are just as useless, but at least a bit more gramatical
llvm-svn: 122305
2010-12-21 02:07:03 +00:00
cdcc4fc048
Fix a copy-pasto. When the tBR_JTr instruction was converted to using the
...
tPseudoInst class, its size was changed from "special" to "2 bytes". This is
incorrect because the jump table will no longer be taken into account when
calculating branch offsets.
<rdar://problem/8782216>
llvm-svn: 122303
2010-12-21 01:57:15 +00:00
18581a4ac0
Comment cleanups.
...
llvm-svn: 122302
2010-12-21 01:54:40 +00:00
2530cd2a4c
Add EdgeBundles to SplitKit.
...
Edge bundles is an annotation on the CFG that turns it into a bipartite directed
graph where each basic block is connected to an outgoing and an ingoing bundle.
These bundles are useful for identifying regions of the CFG for live range
splitting.
llvm-svn: 122301
2010-12-21 01:50:21 +00:00
4c278f82c8
Use IntEqClasses to compute connected components of live intervals.
...
llvm-svn: 122296
2010-12-21 00:48:17 +00:00
baee655c5e
Add ADT/IntEqClasses.h as a light-weight implementation of EquivalenceClasses.h.
...
This implementation already exists as ConnectedVNInfoEqClasses in
LiveInterval.cpp, and it seems to be generally useful to have a light-weight way
of forming equivalence classes of small integers.
IntEqClasses doesn't allow enumeration of the elements in a class.
llvm-svn: 122293
2010-12-21 00:04:46 +00:00
c6beda80ff
Speculatively revert the use of DenseMap in LazyValueInfo, which may be causing Linux self-host failures.
...
llvm-svn: 122291
2010-12-20 23:53:19 +00:00
9be3ec6264
Attempt to appease the DragonEgg buildbots.
...
llvm-svn: 122288
2010-12-20 23:23:18 +00:00
aa81496c76
Revert r122114 (CallbackVH observing use-list changes) because it caused severe slowdowns on the Linux self-host configuration.
...
llvm-svn: 122279
2010-12-20 22:28:03 +00:00
4b9db07b02
Implement feedback from Bruno on making pblendvb an x86-specific ISD node in addition to being an intrinsic, and convert
...
lowering to use it. Hopefully the pattern fragment is doing the right thing with XMM0, looks correct in testing.
llvm-svn: 122277
2010-12-20 22:04:24 +00:00
813a2c45a8
Convert one of LVI's primary maps to a DenseMap, now that we know are more assured of iterator stability.
...
llvm-svn: 122273
2010-12-20 21:30:54 +00:00
ae58e7b179
Teach the MBlaze disassembler to disassemble special purpose registers.
...
llvm-svn: 122269
2010-12-20 21:18:04 +00:00
55184ddd35
Set the value of absolute symbols.
...
llvm-svn: 122268
2010-12-20 21:14:39 +00:00
eaff500c7b
Oops, forgot to add the pass itself!
...
llvm-svn: 122265
2010-12-20 21:07:42 +00:00
a436cbe4bf
Add a new convenience pass for testing InstructionSimplify. Previously
...
it could only be tested indirectly, via instcombine, gvn or some other
pass that makes use of InstructionSimplify, which means that testcases
had to be carefully contrived to dance around any other transformations
that that pass did.
llvm-svn: 122264
2010-12-20 20:54:37 +00:00
3307d7cbad
Teach the MBlaze asm parser how to parse special purpose register names.
...
llvm-svn: 122261
2010-12-20 20:43:24 +00:00
0a291a36f2
Cosmetic changes.
...
llvm-svn: 122259
2010-12-20 20:10:50 +00:00
f7957d0463
Add a check missing from my last commit and avoid a potential overflow situation.
...
llvm-svn: 122258
2010-12-20 20:00:31 +00:00
d83f98a51e
More LVI cleanups, including trying to simplify the process of maintaining the OverDefinedCache.
...
llvm-svn: 122256
2010-12-20 19:33:41 +00:00
64c2c5798a
Reuse the reference into the LVI cache throughout the solver subsystem. This is much easier to
...
verify as being safe thanks its recent de-recursivization.
llvm-svn: 122254
2010-12-20 18:18:16 +00:00
2bca3a67b3
Reduce indentation.
...
llvm-svn: 122249
2010-12-20 16:21:59 +00:00
68531baea9
Teach InstCombine to merge (icmp ult (X + CA), C1) | (icmp eq X, C2) into (icmp ult (X + CA), C1 + 1) if C2 + CA == C1.
...
InstCombine creates these so now we compile x == 23 || x == 24 || x == 25 to
%x.off = add i32 %x, -23
%1 = icmp ult i32 %x.off, 3
instead of
%x.off = add i32 %x, -23
%1 = icmp ult i32 %x.off, 2
%cmp3 = icmp eq i32 %x, 25
%ret2 = or i1 %1, %cmp3
llvm-svn: 122248
2010-12-20 16:18:51 +00:00
ca2511d849
Add header...
...
llvm-svn: 122247
2010-12-20 15:45:51 +00:00
7da045e59f
X86/MC/Mach-O: Split out createX86MachObjectWriter().
...
llvm-svn: 122246
2010-12-20 15:07:39 +00:00
ed6d6c33dd
Have SimplifyBinOp dispatch Xor, Add and Sub to the corresponding methods
...
(they had just been forgotten before). Adding Xor causes "main" in the
existing testcase 2010-11-01-lshr-mask.ll to be hugely more simplified.
llvm-svn: 122245
2010-12-20 14:47:04 +00:00
6d4b7e7e83
Support/PathV2: Add missing has_relative_path impl.
...
llvm-svn: 122243
2010-12-20 13:30:28 +00:00
70db5e7cb2
There is no need for isAssociative to take the type as an argument anymore.
...
llvm-svn: 122242
2010-12-20 13:10:23 +00:00
27ca8ebd4b
fix PR8807 by making transformConstExprCastCall aware of byval arguments.
...
llvm-svn: 122238
2010-12-20 08:36:38 +00:00
7398965b67
various cleanups for transformConstExprCastCall
...
llvm-svn: 122237
2010-12-20 08:25:06 +00:00
0f11495289
when eliding a byval copy due to inlining a readonly function, we have
...
to make sure that the reused alloca has sufficient alignment.
llvm-svn: 122236
2010-12-20 08:10:40 +00:00
Cameron Zwarich