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Author SHA1 Message Date
Rafael Espindola 3686473578 Fix PR8878. 
llvm-svn: 122658
 2011-01-01 19:05:35 +00:00
Duncan Sands 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
Che-Liang Chiou 5451fc9195 ptx: remove reg-reg addressing mode and st.const 
llvm-svn: 122653
 2011-01-01 11:58:58 +00:00
Che-Liang Chiou 15e8d2c5e7 ptx: add store instruction 
llvm-svn: 122652
 2011-01-01 10:50:37 +00:00
Oscar Fuentes 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
Duncan Sands 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
Duncan Sands 6cc7126ed9 Zap dead instructions harder. 
llvm-svn: 122645
 2010-12-31 16:17:54 +00:00
Benjamin Kramer 570dd787a6 Make a bunch of symbols internal. 
llvm-svn: 122642
 2010-12-30 22:34:44 +00:00
Nick Lewycky 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
Che-Liang Chiou 3ee0501338 ptx: add state spaces 
llvm-svn: 122638
 2010-12-30 10:41:27 +00:00
Chris Lattner e240995e41 include the module identifier when emitting this warning, PR8865. 
llvm-svn: 122637
 2010-12-30 02:49:45 +00:00
Chris Lattner 1556522a34 print the right string, thanks for Frits for noticing. 
llvm-svn: 122636
 2010-12-30 01:07:20 +00:00
Cameron Zwarich 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
Chris Lattner bd530a8e83 improve warning message to at least say what the triples are. 
llvm-svn: 122632
 2010-12-29 22:41:18 +00:00
Wesley Peck 1f289afc25 Fix stack layout error in MBlaze backend. 
llvm-svn: 122631
 2010-12-29 19:46:28 +00:00
Daniel Dunbar ab14a6f174 MC/Mach-O/Thumb: Set the thumb bit in the symbol table. 
llvm-svn: 122630
 2010-12-29 14:14:06 +00:00
Cameron Zwarich 329cd49ce6 None of the other pass names in CodeGen have terminating periods. 
llvm-svn: 122628
 2010-12-29 11:49:10 +00:00
Cameron Zwarich 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
Venkatraman Govindaraju 0a09160e51 SPARC backend fix: correctly passing arguments through stack 
llvm-svn: 122626
 2010-12-29 05:37:15 +00:00
Cameron Zwarich bfef075140 Add a missing word to a comment. 
llvm-svn: 122625
 2010-12-29 04:42:39 +00:00
Rafael Espindola 46a5b05207 Correctly encode pcrel|indirect. 
llvm-svn: 122624
 2010-12-29 04:31:26 +00:00
NAKAMURA Takumi 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
Cameron Zwarich 458fd305d4 Add text explaining an assertion. 
llvm-svn: 122617
 2010-12-29 03:52:51 +00:00
Rafael Espindola 2ae93b2c9c Remove second return. 
llvm-svn: 122616
 2010-12-29 02:42:33 +00:00
Rafael Espindola 563301dfdb Fix bug when trying to output uint16_t or uint32_t. 
llvm-svn: 122615
 2010-12-29 02:30:49 +00:00
Rafael Espindola 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
Chris Lattner 1be1fe033c fix PR8867: a crash handling fp128. Thanks to Nick for the testcase. 
llvm-svn: 122613
 2010-12-29 01:33:36 +00:00
Rafael Espindola 426e68f793 Implement cfi_def_cfa_register. 
llvm-svn: 122612
 2010-12-29 00:26:06 +00:00
Rafael Espindola 86d347dd31 Initial .cfi_offset implementation. 
llvm-svn: 122611
 2010-12-29 00:09:59 +00:00
Cameron Zwarich 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
Rafael Espindola 6bbfb6c06c Don't produce a "DW_CFA_advance_loc 0". 
llvm-svn: 122609
 2010-12-28 23:38:03 +00:00
Cameron Zwarich 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
Venkatraman Govindaraju 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
Chris Lattner 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
Chris Lattner 102bc01900 add a note from llvmdev 
llvm-svn: 122603
 2010-12-28 18:45:02 +00:00
Rafael Espindola 85d91982ca Implement .cfi_remember_state and .cfi_restore_state. 
llvm-svn: 122602
 2010-12-28 18:36:23 +00:00
Benjamin Kramer b6d52b8b64 Cast away "comparison between signed and unsigned integer" warnings. 
llvm-svn: 122598
 2010-12-28 13:52:52 +00:00
Benjamin Kramer 110442d8a0 Fix a signed/unsigned comparison warning. 
llvm-svn: 122597
 2010-12-28 13:05:13 +00:00
Cameron Zwarich 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
Duncan Sands 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
Duncan Sands 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
Duncan Sands 5cf10e691b Silence gcc warning about an unused variable when doing a release build. 
llvm-svn: 122593
 2010-12-28 09:41:15 +00:00
Rafael Espindola 736a35d9ab Relax address updates in the eh_frame section. 
llvm-svn: 122591
 2010-12-28 05:39:27 +00:00
Rafael Espindola a75b87b55a Start adding basic support for emitting the call frame instructions. 
llvm-svn: 122590
 2010-12-28 04:15:37 +00:00
Michael J. Spencer 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
Michael J. Spencer 848f46bb84 Support/PathV2: Implement has_magic. 
llvm-svn: 122587
 2010-12-28 01:49:01 +00:00
Cameron Zwarich 5e5cfbe871 Change an assertion to assert what the code actually relies upon. 
llvm-svn: 122586
 2010-12-27 22:08:42 +00:00
Chris Lattner cb18bfa3d2 fix some issues Frits noticed, add AliasAnalysis as a dependency 
llvm-svn: 122585
 2010-12-27 18:39:08 +00:00
Rafael Espindola 1de2dd0e5e Add support for .cfi_lsda. 
llvm-svn: 122584
 2010-12-27 15:56:22 +00:00
Daniel Dunbar a895c69431 MC/Mach-O/Thumb: Select appropriate relocation types for Thumb. 
llvm-svn: 122583
 2010-12-27 14:49:49 +00:00
Cameron Zwarich 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
Cameron Zwarich 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
Michael J. Spencer 9e590024f6 Support/PathV1: Deprecate GetRootDirectory. 
llvm-svn: 122580
 2010-12-27 03:21:41 +00:00
Rafael Espindola 8fc59a682f Handle reloc_riprel_4byte_movq_load. Should make the bots happy. 
llvm-svn: 122579
 2010-12-27 02:03:24 +00:00
Rafael Espindola 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
Benjamin Kramer 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
Benjamin Kramer 7cba269dfb SimplifyLibCalls: Use IRBuilder to simplify code. 
llvm-svn: 122575
 2010-12-27 00:16:46 +00:00
Chris Lattner b9fe685b9a have loop-idiom nuke instructions that feed stores that get removed. 
llvm-svn: 122574
 2010-12-27 00:03:23 +00:00
Chris Lattner 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
Chris Lattner 6cf8d6cc6e start using irbuilder to make mem intrinsics in a few passes. 
llvm-svn: 122572
 2010-12-26 22:57:41 +00:00
Chris Lattner 143a07cfee add methods to IRBuilder to create memcpy/memset/memmove. 
llvm-svn: 122571
 2010-12-26 22:49:25 +00:00
Rafael Espindola 54462cd730 Fix .cfi_personality on 32 bit systems. 
llvm-svn: 122570
 2010-12-26 22:47:37 +00:00
Rafael Espindola 9ae2d05d45 Add support for @note. Patch by Jörg Sonnenberger. 
llvm-svn: 122568
 2010-12-26 21:30:59 +00:00
Chris Lattner 7c5f9c35d1 sketch more of this out. 
llvm-svn: 122567
 2010-12-26 20:45:45 +00:00
Rafael Espindola 9141b611ad Add basic support for .cfi_personality. 
llvm-svn: 122566
 2010-12-26 20:20:31 +00:00
Chris Lattner 9cb1035f94 move isBytewiseValue out to ValueTracking.h/cpp 
llvm-svn: 122565
 2010-12-26 20:15:01 +00:00
Chris Lattner 81ae3f299a actually add the file... 
llvm-svn: 122563
 2010-12-26 19:39:38 +00:00
Chris Lattner 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
Benjamin Kramer 30342fb1fd Simplify code. 
llvm-svn: 122561
 2010-12-26 15:23:45 +00:00
Chris Lattner f9e0a56b94 fix some sort of weird pasto 
llvm-svn: 122560
 2010-12-26 12:05:11 +00:00
Chris Lattner 424de3498b add a note 
llvm-svn: 122559
 2010-12-26 03:53:31 +00:00
Chris Lattner 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
Chris Lattner d729d0dcdb don't lose TD info 
llvm-svn: 122556
 2010-12-25 20:52:04 +00:00
Chris Lattner 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
Chris Lattner 6fcd32e7d7 Move getOrEnforceKnownAlignment out of instcombine into Transforms/Utils. 
llvm-svn: 122554
 2010-12-25 20:37:57 +00:00
Michael J. Spencer e13f1ead9b Support/PathV1: Deprecate makeAbsolute and remove Unix impl because it annoys people. 
llvm-svn: 122553
 2010-12-25 20:10:11 +00:00
Benjamin Kramer 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
Rafael Espindola 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
Benjamin Kramer 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
Daniel Dunbar 7f2bb4dcae MC/Mach-O/ARM: Start handling some Thumb branches. 
llvm-svn: 122547
 2010-12-24 16:41:46 +00:00
Andrew Trick 5ce945ca3a Minor cleanup related to my latest scheduler changes. 
llvm-svn: 122545
 2010-12-24 07:10:19 +00:00
Andrew Trick 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
Andrew Trick 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
Andrew Trick c416ba612b whitespace 
llvm-svn: 122539
 2010-12-24 04:28:06 +00:00
Cameron Zwarich ab434079d3 Simplify a check for implicit defs and remove a FIXME. 
llvm-svn: 122537
 2010-12-24 03:09:36 +00:00
Kevin Enderby 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
Jim Grosbach ffaea0f017 Use a StringSwitch<> instead of a manually constructed string matcher. 
llvm-svn: 122530
 2010-12-24 00:03:39 +00:00
Owen Anderson 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
Evan Cheng 62de0fa671 Code clean up. No functionality change. 
llvm-svn: 122528
 2010-12-23 23:54:17 +00:00
Jim Grosbach 545858d209 Remove dead patterns. 
llvm-svn: 122524
 2010-12-23 23:20:13 +00:00
Jim Grosbach 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
Bob Wilson 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
Owen Anderson 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
Chris Lattner 2a0a3b43d7 Flag -> Glue, the ongoing saga 
llvm-svn: 122513
 2010-12-23 18:28:41 +00:00
Chris Lattner 11a33811b6 flags -> glue for selectiondag 
llvm-svn: 122509
 2010-12-23 17:24:32 +00:00
Chris Lattner f647e95b9a sdisel flag -> glue. 
llvm-svn: 122507
 2010-12-23 17:13:18 +00:00
Benjamin Kramer 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
Benjamin Kramer 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
Andrew Trick 528fad91d2 Reorganize ListScheduleBottomUp in preparation for modeling machine cycles and instruction issue. 
llvm-svn: 122491
 2010-12-23 05:42:20 +00:00
Andrew Trick 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