Commit Graph

33136 Commits

Author SHA1 Message Date
Owen Anderson 168ad6985e Refactor lookup_or_add to contain _MUCH_ less duplicated code. Add support for
numbering first class aggregate instructions while we're at it.

llvm-svn: 84547
2009-10-19 22:14:22 +00:00
Chris Lattner ef2979b1da add register list and hacked up addrmode #4 support, we now get this:
_main:
	stmsp! sp!, {r7, lr}
	mov r7, sp
	sub sp, sp, #4
	mov r0, #0
	str r0, [sp]
	ldr r0, LCPI1_0
	bl _printf
	ldr r0, [sp]
	mov sp, r7
	ldmsp! sp!, {r7, pc}

Note the unhappy ldm/stm because of modifiers being ignored.

llvm-svn: 84546
2009-10-19 22:09:23 +00:00
Chris Lattner f264f8a21c revert r84540, fixing build breakage I didn't see because of
broken makefile deps :(

llvm-svn: 84544
2009-10-19 21:59:25 +00:00
Chris Lattner 7ddfdc4133 add addrmode2 support, getting us up to:
_main:
	stm , 
	mov r7, sp
	sub sp, sp, #4
	mov r0, #0
	str r0, [sp]
	ldr r0, LCPI1_0
	bl _printf
	ldr r0, [sp]
	mov sp, r7
	ldm , 

llvm-svn: 84543
2009-10-19 21:57:05 +00:00
Chris Lattner 889a6217fa add jump tables, constant pools and some trivial global
lowering stuff.  We can now compile hello world to:

_main:
	stm , 
	mov r7, sp
	sub sp, sp, #4
	mov r0, #0
	str r0, 
	ldr r0, 
	bl _printf
	ldr r0, 
	mov sp, r7
	ldm , 

Almost looks like arm code :)

llvm-svn: 84542
2009-10-19 21:53:00 +00:00
Victor Hernandez 5c704d505c Malloc calls are marked NoAlias, so the code below the isMalloc() check makes it redundant. Removing the isMalloc() check.
llvm-svn: 84541
2009-10-19 21:47:22 +00:00
Chris Lattner e3796a0fee pass mangler in as a reference instead of a pointer.
llvm-svn: 84540
2009-10-19 21:45:31 +00:00
Chris Lattner 8bd9b9d3fa reduce #includes
llvm-svn: 84536
2009-10-19 21:23:15 +00:00
Chris Lattner 89d47205b5 add printing support for SOImm operands, getting us to:
_main:
	stm , 
	mov r7, sp
	sub sp, sp, #4
	mov r0, #0
	str r0, 

llvm-svn: 84535
2009-10-19 21:21:39 +00:00
Owen Anderson 1059b5b32d Simplify some code.
llvm-svn: 84533
2009-10-19 21:14:57 +00:00
Chris Lattner 93e3ef6536 wire up some basic printOperand goodness, giving us stuff like this before
we abort:

_main:
	stm , 
	mov r7, sp
	sub sp, sp, 
	mov r0, 
	str r0, 

llvm-svn: 84532
2009-10-19 20:59:55 +00:00
Chris Lattner 78393d79a0 add the files that go with the previous rev
llvm-svn: 84531
2009-10-19 20:21:05 +00:00
Chris Lattner 71eb077c15 wire up skeletal support for having llc print instructions
through mcinst lowering -> mcinstprinter, when llc is passed
the -enable-arm-mcinst-printer flag.  Currently this
is very "aborty".

llvm-svn: 84530
2009-10-19 20:20:46 +00:00
Owen Anderson 5dab84ca9c Banish ConstantsLock. It's serving no purpose other than slowing things down
at the moment.

llvm-svn: 84529
2009-10-19 20:11:52 +00:00
Chris Lattner 296544e15f wire up ARM's printMCInst method. Now llvm-mc should be able to produce
"something" when printing MCInsts, it will just be missing all the 
operand info.

llvm-svn: 84528
2009-10-19 19:59:05 +00:00
Chris Lattner a290778859 stub out a minimal ARMInstPrinter.
llvm-svn: 84527
2009-10-19 19:56:26 +00:00
Chris Lattner 5db7b6a5d4 remove strings from instructions who are never asmprinted.
All of these "subreg32" modifier instructions are handled
explicitly by the MCInst lowering phase.  If they got to
the asmprinter, they would explode.  They should eventually
be replace with correct use of subregs.

llvm-svn: 84526
2009-10-19 19:51:42 +00:00
Jeffrey Yasskin 7d2edada7f Clean up the JITResolver stub/callsite<->function maps.
The JITResolver maps Functions to their canonical stubs and all callsites for
lazily-compiled functions to their target Functions. To make Function
destruction work, I'm going to need to remove all callsites on destruction, so
this patch also adds the reverse mapping for that.

There was an incorrect assumption in here that the only stub for a function
would be the one caused by needing to lazily compile it, while x86-64 far calls
and dlsym-stubs could also cause such stubs, but I didn't look for a test case
that the assumption broke.

This also adds DenseMapInfo<AssertingVH> so I can use DenseMaps instead of
std::maps.

llvm-svn: 84522
2009-10-19 18:49:59 +00:00
Chris Lattner 8d2e3a28d6 simplify code, reducing string thrashing.
llvm-svn: 84521
2009-10-19 18:49:14 +00:00
Chris Lattner 3334deb19b switch hidden gv stubs to use MachineModuleInfoMachO instead of a custom map.
llvm-svn: 84520
2009-10-19 18:44:38 +00:00
Chris Lattner 6462adcd20 use MachineModuleInfoMachO for non-lazy gv stubs instead of a private map.
llvm-svn: 84519
2009-10-19 18:38:33 +00:00
Anton Korobeynikov 8383c3d7f3 Revert r84295, this unbreaks llvm-gcc bootstrap on x86-64/linux
llvm-svn: 84516
2009-10-19 18:21:09 +00:00
Chris Lattner 24fcb826bd remove dead map
llvm-svn: 84513
2009-10-19 18:11:25 +00:00
Chris Lattner 84a493ca21 don't bother trying to avoid emitting redundant constant pool alignment directives.
llvm-svn: 84512
2009-10-19 18:08:02 +00:00
Chris Lattner 66ebfab3ab remove accidental comment.
llvm-svn: 84510
2009-10-19 18:03:41 +00:00
Chris Lattner e6da1826e8 emit .subsections_via_symbols through MCStreamer instead of textually.
llvm-svn: 84509
2009-10-19 18:03:08 +00:00
Chris Lattner ee9399acaa cleanup doFinalization -> EmitEndOfAsmFile.
llvm-svn: 84508
2009-10-19 17:59:19 +00:00
Nate Begeman 5ca7b345b9 PR 5245 - The imediate size target flag was not set on 3A-prefixed SSSE3 instructions.
llvm-svn: 84506
2009-10-19 17:31:16 +00:00
Dan Gohman 8f986672a1 Fix SplitBlockPredecessors' LoopInfo updating code to handle the case
where a loop's header is being split and it has predecessors which are not
contained by the most-nested loop which contains the loop.
This fixes PR5235.

llvm-svn: 84505
2009-10-19 16:04:50 +00:00
Dan Gohman b0db9917af Fix a typo in a comment.
llvm-svn: 84504
2009-10-19 14:56:05 +00:00
Dan Gohman 20a327b31f Change a few instance variables to be local variables.
llvm-svn: 84503
2009-10-19 14:52:05 +00:00
Dan Gohman 511d2e26dd Change instnamer to name arguments "arg" instead of "tmp" for clarity, and
to name basic blocks "bb" instead of "BB", for consistency.

llvm-svn: 84502
2009-10-19 14:47:32 +00:00
Torok Edwin 033f01c922 Fix PR5247, "lock addq" pattern (and other atomics), it DOES modify EFLAGS.
LLC was scheduling compares before the adds causing wrong branches to be taken
in programs, resulting in misoptimized code wherever atomic adds where used.

llvm-svn: 84485
2009-10-19 11:00:58 +00:00
Chris Lattner b0c23e81e7 various cleanups.
llvm-svn: 84471
2009-10-19 07:10:59 +00:00
Chris Lattner aa1332ed72 simplify.
llvm-svn: 84465
2009-10-19 05:51:03 +00:00
Chris Lattner 8d58f2f8ea clean up after metadata changes.
llvm-svn: 84463
2009-10-19 05:31:10 +00:00
Nate Begeman 18df82a20c Add support for matching shuffle patterns with palignr.
llvm-svn: 84459
2009-10-19 02:17:23 +00:00
Evan Cheng f0236e011e Spill slots cannot alias.
llvm-svn: 84432
2009-10-18 19:58:47 +00:00
Evan Cheng c436631a9c Turn on post-alloc scheduling for x86.
llvm-svn: 84431
2009-10-18 19:57:27 +00:00
Evan Cheng 936d87b39d Oops. I forgot to change the tests first. Disable post-alloc scheduling.
llvm-svn: 84425
2009-10-18 18:31:31 +00:00
Evan Cheng 0e9d9ca855 -Revert parts of 84326 and 84411. Distinquishing between fixed and non-fixed
stack slots and giving them different PseudoSourceValue's did not fix the
problem of post-alloc scheduling miscompiling llvm itself.
- Apply Dan's conservative workaround by assuming any non fixed stack slots can
alias other memory locations. This means a load from spill slot #1 cannot 
move above a store of spill slot #2. 
- Enable post-alloc scheduling for x86 at optimization leverl Default and above.

llvm-svn: 84424
2009-10-18 18:16:27 +00:00
Evan Cheng 0b8db2dab7 Only fixed stack objects and spill slots should be get FixedStack PseudoSourceValue.
llvm-svn: 84411
2009-10-18 06:27:36 +00:00
Chris Lattner c05471ea5b remove some nonascii weird stuff
llvm-svn: 84410
2009-10-18 05:27:44 +00:00
Chris Lattner 39afe7e657 add some fixme's
llvm-svn: 84408
2009-10-18 05:09:15 +00:00
Chris Lattner 1fa98f0d74 remove the IndMemRemPass, which only made sense for when malloc/free were intrinsic
instructions.

llvm-svn: 84404
2009-10-18 05:02:09 +00:00
Chris Lattner f4591d9a72 fix the other issue with ID's, hopefully really fixing the linux build.
llvm-svn: 84403
2009-10-18 04:58:34 +00:00
Chris Lattner 7883fc2ab1 fix some problems with ID definitions, which will hopefully fix the build bots.
llvm-svn: 84399
2009-10-18 04:27:14 +00:00
Chris Lattner 9e6882c8de add function passes for printing various dominator datastructures
accessible through opt.  Patch by Tobias Grosser!

llvm-svn: 84397
2009-10-18 04:10:40 +00:00
Chris Lattner da42426e04 make DOTGraphTraits public, patch by Tobias Grosser!
llvm-svn: 84396
2009-10-18 04:09:11 +00:00
Nick Lewycky bb1410ea8b Fix test/Bindings/Ocaml/vmcore.ml. When IRBuilder::CreateMalloc was removed,
LLVMBuildMalloc was reimplemented but with the bug that it didn't insert the
resulting instruction.

llvm-svn: 84374
2009-10-17 23:52:26 +00:00
Chris Lattner b2647b9e67 inline isGEP away.
llvm-svn: 84373
2009-10-17 23:48:54 +00:00
Daniel Dunbar 54279632f3 Fix my -Asserts warning fix.
llvm-svn: 84372
2009-10-17 23:15:04 +00:00
Chris Lattner f67d297eda Teach vm core to more aggressively fold 'trunc' constantexprs,
allowing it to simplify the crazy constantexprs in the testcases
down to something sensible.  This allows -std-compile-opts to
completely "devirtualize" the pointers to member functions in
the testcase from PR5176.

llvm-svn: 84368
2009-10-17 21:53:27 +00:00
Daniel Dunbar 04f049f2f5 Move UnescapeString to a static function for its sole client; its inefficient and broken.
llvm-svn: 84358
2009-10-17 20:43:42 +00:00
Daniel Dunbar 59449581b2 Remove llvm::EscapeString, raw_ostream::write_escaped is much faster.
llvm-svn: 84357
2009-10-17 20:43:29 +00:00
Daniel Dunbar 8eff29d805 Use raw_ostream::write_escaped instead of EscapeString.
llvm-svn: 84356
2009-10-17 20:43:19 +00:00
Daniel Dunbar 4108c43fd1 Add raw_ostream::write_escaped, for writing escaped strings.
llvm-svn: 84355
2009-10-17 20:43:08 +00:00
Mikhail Glushenkov 867f67301b First draft of the OptionPreprocessor.
More to follow...

llvm-svn: 84352
2009-10-17 20:09:29 +00:00
Nick Lewycky e63c2cb3b7 Emit newlines at the end of instructions too.
llvm-svn: 84348
2009-10-17 19:43:45 +00:00
Daniel Dunbar 77668004c4 Move StringMap's string has function into StringExtras.h
llvm-svn: 84344
2009-10-17 18:21:06 +00:00
Daniel Dunbar c099f1a0c5 Remove unnecessary include.
llvm-svn: 84336
2009-10-17 18:11:57 +00:00
Daniel Dunbar 47dfc9ae1b Suppress -Asserts warning.
llvm-svn: 84327
2009-10-17 09:33:00 +00:00
Evan Cheng 4729191bb2 Distinquish stack slots from other stack objects. They (and fixed objects) get FixedStack PseudoSourceValues.
llvm-svn: 84326
2009-10-17 09:20:14 +00:00
Evan Cheng 8759585aba Revert 84315 for now. Re-thinking the patch.
llvm-svn: 84321
2009-10-17 07:53:04 +00:00
Evan Cheng 0818d87ed1 Rename getFixedStack to getStackObject. The stack objects represented are not
necessarily fixed. Only those will negative frame indices are "fixed."

llvm-svn: 84315
2009-10-17 06:22:26 +00:00
Evan Cheng a6e4db8ff7 80 col violation.
llvm-svn: 84311
2009-10-17 06:05:11 +00:00
Chris Lattner 88b36f1140 Simplify some code (first hunk) and fix PR5208 (second hunk) by
updating the callgraph when introducing a call.

llvm-svn: 84310
2009-10-17 05:39:39 +00:00
Dan Gohman 650997fb0b Delete an obsolete comment.
llvm-svn: 84300
2009-10-17 01:37:38 +00:00
Victor Hernandez a3aaf85e23 Remove MallocInst from LLVM Instructions.
llvm-svn: 84299
2009-10-17 01:18:07 +00:00
Dan Gohman 0d3d9ee03e Enhance CodePlacementOpt's unconditional intra-loop branch elimination logic
to be more general and understand more varieties of loops.

Teach CodePlacementOpt to reorganize the basic blocks of a loop so that
they are contiguous. This also includes a fair amount of logic for preserving
fall-through edges while doing so. This fixes a BranchFolding-ism where blocks
which can't be made to use a fall-through edge and don't conveniently fit
anywhere nearby get tossed out to the end of the function.

llvm-svn: 84295
2009-10-17 00:32:43 +00:00
Victor Hernandez c7d6a8327c Autoupgrade malloc insts to malloc calls.
Update testcases that rely on malloc insts being present.

Also prematurely remove MallocInst handling from IndMemRemoval and RaiseAllocations to help pass tests in this incremental step.

llvm-svn: 84292
2009-10-17 00:00:19 +00:00
Victor Hernandez 264da3274e HeapAllocSRoA also needs to check if malloc array size can be computed.
llvm-svn: 84288
2009-10-16 23:12:25 +00:00
Mon P Wang b1baaf5ab9 Allow widening of extract subvector
llvm-svn: 84279
2009-10-16 22:05:48 +00:00
Devang Patel 12524fd2e5 Do not emit name entry for a pointer type.
llvm-svn: 84276
2009-10-16 21:27:43 +00:00
Evan Cheng 007ceb4603 Change createPostRAScheduler so it can be turned off at llc -O1.
llvm-svn: 84273
2009-10-16 21:06:15 +00:00
Dan Gohman 99429a00ff Move zext and sext casts fed by loads into the same block as the
load, to help SelectionDAG fold them into the loads, unless
conditions are unfavorable.

llvm-svn: 84271
2009-10-16 20:59:35 +00:00
Devang Patel 8f842d31fd Parse PHI instruction with attached metadata.
llvm-svn: 84264
2009-10-16 18:45:49 +00:00
Devang Patel d0099a94db If there is not any llvm instruction associated with each lexical scope encoded in debug info then create such scope on demand for variable info.
llvm-svn: 84262
2009-10-16 18:18:03 +00:00
Victor Hernandez 6f834660c9 Invert isSafeToGetMallocArraySize check because we return NULL when we don't know the size.
Thanks to Duncan Sands for noticing this bug.

llvm-svn: 84261
2009-10-16 18:08:17 +00:00
Duncan Sands 0058c7bcb0 Strip trailing white space.
llvm-svn: 84256
2009-10-16 15:20:13 +00:00
Benjamin Kramer ca019e704c Update CMake file.
llvm-svn: 84252
2009-10-16 10:29:08 +00:00
Sanjiv Gupta 89259d7929 Cleaned up some code. No functionality change.
llvm-svn: 84251
2009-10-16 08:58:34 +00:00
Evan Cheng 343d17d762 I am no spelling bee.
llvm-svn: 84250
2009-10-16 06:18:09 +00:00
Evan Cheng 03da4dba59 Enable post-alloc scheduling for all ARM variants except for Thumb1.
llvm-svn: 84249
2009-10-16 06:11:08 +00:00
Evan Cheng 8b614768f8 If post-alloc scheduler is not enabled, it should return false, not true.
llvm-svn: 84248
2009-10-16 06:10:34 +00:00
Zhongxing Xu 47062ce503 Indent code.
llvm-svn: 84247
2009-10-16 05:42:28 +00:00
Evan Cheng 8cd7c92613 Add comment.
llvm-svn: 84246
2009-10-16 05:33:58 +00:00
Evan Cheng 9c096840a0 80 column violation.
llvm-svn: 84244
2009-10-16 05:18:39 +00:00
Bob Wilson 01404ecec7 Fix more NEON instruction encodings.
Patch by Johnny Chen.

llvm-svn: 84243
2009-10-16 03:58:44 +00:00
Chris Lattner 4794b2b27b Add half precision floating point support (float16) to APFloat,
patch by Peter Johnson! (PR5195)

llvm-svn: 84239
2009-10-16 02:13:51 +00:00
Chris Lattner 27f2049305 add haiku support, patch by Paul Davey!
llvm-svn: 84238
2009-10-16 02:06:30 +00:00
Daniel Dunbar 5d9134747b MC: Set symbol values in MachO MCStreamer.
llvm-svn: 84236
2009-10-16 01:58:23 +00:00
Daniel Dunbar e024def785 Minor formatting tweaks.
llvm-svn: 84235
2009-10-16 01:58:15 +00:00
Daniel Dunbar 8e6d889d4c MC: Switch assembler API to using MCExpr instead of MCValue.
llvm-svn: 84234
2009-10-16 01:58:03 +00:00
Daniel Dunbar c3bd60e393 MC: Remove unneeded context argument to MCExpr::Evaluate*.
llvm-svn: 84233
2009-10-16 01:57:52 +00:00
Daniel Dunbar 5f339244fb MC: Tweak variable assignment diagnostics, and make reassignment of non-absolute
variables and symbols invalid.

llvm-svn: 84232
2009-10-16 01:57:39 +00:00
Daniel Dunbar d20cda028a MC: When parsing a variable reference, substitute absolute variables immediately
since they are allowed to be redefined.

llvm-svn: 84230
2009-10-16 01:34:54 +00:00
Daniel Dunbar 17b9027b5c MC: Move assembler variable values from MCContext to MCSymbol.
llvm-svn: 84229
2009-10-16 01:33:57 +00:00
Daniel Dunbar 584a1b25ef MC: Switch MCContext value table to storing MCExprs.
llvm-svn: 84228
2009-10-16 01:33:11 +00:00
Evan Cheng 8ec25937f1 When checking aliases between phi sources and V2, we know the sources are not themselves phi nodes. However, V2 may be. Call aliasCheck with V2 first to potentially eliminate a std::swap call.
llvm-svn: 84226
2009-10-16 00:33:09 +00:00
Bob Wilson 419160bd79 Revert svn r80498 and replace it with a different solution. The only problem
I can see with the original code was that I forgot that this runs after
type legalization and hence the result type will always be i32. (Custom
legalization of EXTRACT_VECTOR_ELT is only enabled for vector types with
8- and 16-bit elements.)

Regarding the FIXME comment: any information about sign and zero-extension
should be captured by separate extension operations.  The DAG combiner should
handle those to produce either VGETLANEu or VGETLANEs, and that seems to be
working now.  If there are cases that we're missing, let me know.

llvm-svn: 84218
2009-10-15 23:12:05 +00:00
Anton Korobeynikov 49e417c52c Dllexport stuff cleanup:
1. Emit external function type information for all COFF targets since it's
a feature of object format
2. Emit linker directives only for cygming (since this is ld-specific stuff)

llvm-svn: 84214
2009-10-15 22:36:18 +00:00
Sandeep Patel 3f23601b00 Branches must be the last instruction in a Thumb2 IT block. Approved by Evan Cheng.
llvm-svn: 84212
2009-10-15 22:25:32 +00:00
Bob Wilson 4138b11c93 Fix encoding bits for N3VLInt3_QHS multiclass with 8-bit elements.
Patch by Johnny Chen.

llvm-svn: 84206
2009-10-15 21:57:47 +00:00
Kevin Enderby 644de27659 Fix ARM memory operand parsing of post indexing with just a base register, that
is just "[Rn]" and no tailing comma with an offset, etc.

llvm-svn: 84205
2009-10-15 21:42:45 +00:00
Bob Wilson 2f9be50774 Fix a potential performance problem in placing ARM constant pools.
In the case where there are no good places to put constants and we fall back
upon inserting unconditional branches to make new blocks, allow all constant
pool references in range of those blocks to put constants there, even if that
means resetting the "high water marks" for those references.  This will still
terminate because you can't keep splitting blocks forever, and in the bad
cases where we have to split blocks, it is important to avoid splitting more
than necessary.

llvm-svn: 84202
2009-10-15 20:49:47 +00:00
Kevin Enderby 146dcf2ab5 More bits of the ARM target assembler for llvm-mc, code added to parse labels
as expressions, code for parsing a few arm specific directives (still needs
the MCStreamer calls for these).  Some clean up of the operand parsing code
and adding some comments.

llvm-svn: 84201
2009-10-15 20:48:48 +00:00
Evan Cheng e4a2117161 Remove X86Subtarget::IsLinux. It's no longer being used.
llvm-svn: 84200
2009-10-15 20:23:21 +00:00
Victor Hernandez 13020b1faf Fix bug where array malloc with unexpected computation of the size argument resulted in MallocHelper
identifying the malloc as a non-array malloc.  This broke GlobalOpt's optimization of stores of mallocs 
to global variables.

The fix is to classify malloc's into 3 categories:
1. non-array mallocs
2. array mallocs whose array size can be determined
3. mallocs that cannot be determined to be of type 1 or 2 and cannot be optimized

getMallocArraySize() returns NULL for category 3, and all users of this function must avoid their 
malloc optimization if this function returns NULL.

Eventually, currently unexpected codegen for computing the malloc's size argument will be supported in
isArrayMalloc() and getMallocArraySize(), extending malloc optimizations to those examples.

llvm-svn: 84199
2009-10-15 20:14:52 +00:00
Benjamin Kramer 74c35c126a Add files Sanjiv forgot.
llvm-svn: 84196
2009-10-15 19:46:34 +00:00
Sanjiv Gupta a07cae65e3 Re-apply 84180 with the fixed test case.
llvm-svn: 84195
2009-10-15 19:26:25 +00:00
Jakob Stoklund Olesen 460ceae432 Move Blackfin intrinsics into the Target/Blackfin directory.
llvm-svn: 84194
2009-10-15 18:50:52 +00:00
Jakob Stoklund Olesen e4197250cc Report errors correctly for unselected target intrinsics.
llvm-svn: 84193
2009-10-15 18:50:03 +00:00
Jakob Stoklund Olesen 923b5aa973 Clean up TargetIntrinsicInfo API. Add pure virtual methods.
llvm-svn: 84192
2009-10-15 18:49:26 +00:00
Nick Lewycky d708a4908c Add missing break statements! Thanks to Duncan Sands for pointing this out!
llvm-svn: 84191
2009-10-15 18:48:58 +00:00
Daniel Dunbar 3b5bdd536b Revert "Complete Rewrite of AsmPrinter, TargetObjectFile based on new
PIC16Section class", it breaks globals.ll.

llvm-svn: 84184
2009-10-15 15:02:14 +00:00
Sanjiv Gupta 917db86b42 Complete Rewrite of AsmPrinter, TargetObjectFile based on new PIC16Section class
derived from MCSection.

llvm-svn: 84180
2009-10-15 10:10:43 +00:00
Sanjiv Gupta 7357636091 Few changes to comply with new DebugInfo Metadata representation.
llvm-svn: 84179
2009-10-15 09:48:25 +00:00
Nick Lewycky 9cec2380f2 Teach basicaa about memcpy/memmove/memset. The length argument can be used to
improve alias results if constant, and the source pointer can't be modified.

llvm-svn: 84175
2009-10-15 07:11:24 +00:00
Nick Lewycky d7216cf74c Teach BasicAA to use the size parameter of the memory use marker intrinsics.
llvm-svn: 84174
2009-10-15 06:12:11 +00:00
Bob Wilson 68ead6c7a8 Be smarter about reusing constant pool entries.
llvm-svn: 84173
2009-10-15 05:52:29 +00:00
Bob Wilson b4f2a85fe4 Fix another problem with ARM constant pools. Radar 7303551.
When ARMConstantIslandPass cannot find any good locations (i.e., "water") to
place constants, it falls back to inserting unconditional branches to make a
place to put them.  My recent change exposed a problem in this area.  We may
sometimes append to the same block more than one unconditional branch.  The
symptoms of this are that the generated assembly has a branch to an undefined
label and running llc with -debug will cause a seg fault.

This happens more easily since my change to prevent CPEs from moving from
lower to higher addresses as the algorithm iterates, but it could have
happened before.  The end of the block may be in range for various constant
pool references, but the insertion point for new CPEs is not right at the end
of the block -- it is at the end of the CPEs that have already been placed
at the end of the block.  The insertion point could be out of range.  When
that happens, the fallback code will always append another unconditional
branch if the end of the block is in range.

The fix is to only append an unconditional branch if the block does not
already end with one.  I also removed a check to see if the constant pool load
instruction is at the end of the block, since that is redundant with
checking if the end of the block is in-range.

There is more to be done here, but I think this fixes the immediate problem.

llvm-svn: 84172
2009-10-15 05:10:36 +00:00
Chris Lattner c855b45b78 only try to fold constantexpr operands when the worklist is first populated,
don't bother every time going around the main worklist.  This speeds up a 
release-asserts opt -std-compile-opts on 403.gcc by about 4% (1.5s).  It
seems to speed up the most expensive instances of instcombine by ~10%.

llvm-svn: 84171
2009-10-15 04:59:28 +00:00
Chris Lattner dd1f68a10c don't bother calling ConstantFoldInstruction unless there is a use of the
instruction (which disqualifies stores, unreachable, etc) and at least the
first operand is a constant.  This filters out a lot of obvious cases that
can't be folded.  Also, switch the IRBuilder to a TargetFolder, which tries
harder.

llvm-svn: 84170
2009-10-15 04:13:44 +00:00
Nick Lewycky fcb27ad54c Take advantage of TargetData when available; we know that the atomic intrinsics
only dereference the element they point to directly with no pointer arithmetic.

llvm-svn: 84159
2009-10-15 00:36:35 +00:00
Dan Gohman c9af381df8 Make CodePlacementOpt align loops, rather than loop headers. The
header is just the entry block to the loop, and it needn't be at
the top of the loop in the code layout.

Remove the code that suppressed loop alignment for outer loops,
so that outer loops are aligned.

llvm-svn: 84158
2009-10-15 00:36:22 +00:00
Evan Cheng 2f61e0946a When LiveVariables is adding implicit-def to model "partial dead", add the earlyclobber marker if the superreg def has it.
llvm-svn: 84153
2009-10-14 23:39:27 +00:00
Evan Cheng 70b1fa5a24 Print earlyclobber for implicit-defs as well.
llvm-svn: 84152
2009-10-14 23:37:31 +00:00
Bob Wilson cfcf6bc70d Fix instruction encoding bits for NEON VPADAL.
Patch by Johnny Chen.

llvm-svn: 84146
2009-10-14 21:43:17 +00:00
Bob Wilson ad03cf02f6 Remove unused variables to fix build warning.
llvm-svn: 84144
2009-10-14 21:40:45 +00:00
Jim Grosbach b1d6fde13e Make loop not recalc getNumOperands() each time around
llvm-svn: 84138
2009-10-14 21:22:39 +00:00
Devang Patel 6875c5ebe4 Add support to record DbgScope as inlined scope.
llvm-svn: 84134
2009-10-14 21:08:09 +00:00
Jim Grosbach 02f5588f62 quiet compiler warning
llvm-svn: 84133
2009-10-14 21:07:11 +00:00
Jim Grosbach 94068707e1 Inst{11-8} for vshl should be 0b0101, not 0b1111.
Refs: A7-17 & A8-750.

Patch by Johnny Chen.

llvm-svn: 84131
2009-10-14 20:31:01 +00:00
Bob Wilson 1a791eedbf Set instruction encoding bits 4 and 7 for ARM register-register and
register-shifted-register instructions.  Patch by Johnny Chen.

llvm-svn: 84124
2009-10-14 19:00:24 +00:00
Bob Wilson c350cdf3b3 Refactor code to select NEON VST intrinsics.
llvm-svn: 84122
2009-10-14 18:32:29 +00:00
Devang Patel 92f8619923 Use isVoidTy()
llvm-svn: 84118
2009-10-14 17:29:00 +00:00
Bob Wilson 12b4799787 Refactor code to select NEON VLD intrinsics.
llvm-svn: 84117
2009-10-14 17:28:52 +00:00
Devang Patel ebaa76ed0d Add copyMD to copy metadata from one instruction to another instruction.
llvm-svn: 84113
2009-10-14 17:02:49 +00:00
Bob Wilson 93117bc499 More refactoring. NEON vst lane intrinsics can share almost all the code for
vld lane intrinsics.

llvm-svn: 84110
2009-10-14 16:46:45 +00:00
Bob Wilson 4145e3ac8d Refactor code for selecting NEON load lane intrinsics.
llvm-svn: 84109
2009-10-14 16:19:03 +00:00
Duncan Sands 8e6ccb65df I don't see any point in having both eh.selector.i32 and eh.selector.i64,
so get rid of eh.selector.i64 and rename eh.selector.i32 to eh.selector.
Likewise for eh.typeid.for.  This aligns us with gcc, which always uses a
32 bit value for the selector on all platforms.  My understanding is that
the register allocator used to assert if the selector intrinsic size didn't
match the pointer size, and this was the reason for introducing the two
variants.  However my testing shows that this is no longer the case (I
fixed some bugs in selector lowering yesterday, and some more today in the
fastisel path; these might have caused the original problems).

llvm-svn: 84106
2009-10-14 16:11:37 +00:00
Chris Lattner 6b9044db01 make instcombine's instruction sinking more aggressive in the
presence of PHI nodes.

llvm-svn: 84103
2009-10-14 15:21:58 +00:00
Evan Cheng b3ccb6498c Clear VisitedPHIs after use.
llvm-svn: 84080
2009-10-14 06:46:26 +00:00
Evan Cheng c1eed9d120 Another BasicAA fix. If a value does not alias a GEP's base pointer, then it
cannot alias the GEP. GEP pointer alias rule states this clearly:
A pointer value formed from a getelementptr instruction is associated with the
addresses associated with the first operand of the getelementptr.

llvm-svn: 84079
2009-10-14 06:41:49 +00:00
Evan Cheng f92f5557ee More code clean up based on patch feedback.
llvm-svn: 84074
2009-10-14 05:22:03 +00:00
Evan Cheng 31565b3e9f Change VisitedPHIs into an instance variable that's freed by each alias() call.
llvm-svn: 84072
2009-10-14 05:05:02 +00:00
Dan Gohman 0be8c2b0e3 Make isSafeToClobberEFLAGS more aggressive. Teach it to scan backwards
(for uses marked kill and defs marked dead) a few instructions in
addition to forwards. Also, increase the maximum number of instructions
to scan, as it appears to help in a fair number of cases.

llvm-svn: 84061
2009-10-14 00:08:59 +00:00
Dan Gohman df777edea9 This remat entry is basically done. There are hooks to allow targets
to remat non-load instructions as loads, and the remat code now uses
the UnmodeledSideEffects flags, MachineMemOperands, and similar things
to decide which instructions are valid for rematerialization.

llvm-svn: 84060
2009-10-14 00:02:01 +00:00
Dan Gohman 0aa63c97ce Add a few README.txt items.
llvm-svn: 84059
2009-10-13 23:58:05 +00:00
Kevin Enderby 3a80daced0 Correct comment about ARM immediates using '#' not '$' and TODO for modifiers.
llvm-svn: 84055
2009-10-13 23:33:38 +00:00
Devang Patel d7ebfe3963 s/DebugLoc.CompileUnit/DebugLoc.Scope/g
s/DebugLoc.InlinedLoc/DebugLoc.InlinedAtLoc/g

llvm-svn: 84054
2009-10-13 23:28:53 +00:00
Devang Patel a677136900 Check void type before using RAUWd.
llvm-svn: 84049
2009-10-13 22:56:32 +00:00
Bob Wilson b62d160b3c More Neon clean-up: avoid the need for custom-lowering vld/st-lane intrinsics
by creating TargetConstants during instruction selection instead of during
legalization.

llvm-svn: 84042
2009-10-13 22:29:24 +00:00
Kevin Enderby f50799412c More bits of the ARM target assembler for llvm-mc to parse immediates.
Also fixed a couple of coding style things that crept in.  And added more
to the temporary hacked up ARMAsmParser::MatchInstruction() method for testing.

llvm-svn: 84040
2009-10-13 22:19:02 +00:00
Evan Cheng c10e88db22 Teach basic AA about PHI nodes. If all operands of a phi NoAlias another value than it's safe to declare the PHI NoAlias the value. Ditto for MustAlias.
llvm-svn: 84038
2009-10-13 22:02:20 +00:00
Bob Wilson 1fdbe1152d NEON VLD/VST are now fully implemented. For operations that expand to
multiple instructions, the expansion is done during selection so there is
no need to do anything special during legalization.

llvm-svn: 84036
2009-10-13 21:55:24 +00:00
Devang Patel 115741ba79 Do not check use_empty() before replaceAllUsesWith(). This gives ValueHandles a chance to get properly updated.
llvm-svn: 84033
2009-10-13 21:41:20 +00:00
Jeffrey Yasskin d162dbac7f Keep track of stubs that are created. This fixes PR5162 and probably PR4822 and
4406. Patch by Nick Lewycky!

llvm-svn: 84032
2009-10-13 21:32:57 +00:00
Duncan Sands 18a956cb4a Introduce new convenience methods for sign extending or
truncating an SDValue (depending on whether the target
type is bigger or smaller than the value's type); or zero
extending or truncating it.  Use it in a few places (this
seems to be a popular operation, but I only modified cases
of it in SelectionDAGBuild).  In particular, the eh_selector
lowering was doing this wrong due to a repeated rather than
inverted test, fixed with this change.

llvm-svn: 84027
2009-10-13 21:04:12 +00:00
Bob Wilson 3b51560ae4 Revise ARM inline assembly memory operands to require the memory address to
be in a register.  The previous use of ARM address mode 2 was completely
arbitrary and inappropriate for Thumb.  Radar 7137468.

llvm-svn: 84022
2009-10-13 20:50:28 +00:00
Dale Johannesen fd04c74bc0 Add an "msasm" flag to inline asm as suggested in PR 5125.
A little ugliness is accepted to keep the binary file format
compatible.  No functional change yet.

llvm-svn: 84020
2009-10-13 20:46:56 +00:00
Sandeep Patel 7460e0822f Fix method name in comment, per Bob Wilson.
llvm-svn: 84017
2009-10-13 20:25:58 +00:00
Dan Gohman 2dc6f8de03 Use the new CodeMetrics class to compute code size instead of
manually counting instructions.

llvm-svn: 84016
2009-10-13 20:12:23 +00:00
Dan Gohman abb728d3f4 Compute a full cost value even when a setjmp call is found.
llvm-svn: 84015
2009-10-13 20:10:10 +00:00
Dan Gohman 2ccea5d13f Split code not specific to Function inlining out into a separate class,
named CodeMetrics. Move it to be a non-nested class. Rename RegionInfo
back to FunctionInfo.

llvm-svn: 84013
2009-10-13 19:58:07 +00:00
David Goodwin 4c98efb917 Add debugging output.
llvm-svn: 84011
2009-10-13 19:16:03 +00:00
Sandeep Patel 423e42b371 Add ARMv6T2 SBFX/UBFX instructions. Approved by Anton Korobeynikov.
llvm-svn: 84009
2009-10-13 18:59:48 +00:00
Ted Kremenek f34311779c Update CMake file (lexically order files).
llvm-svn: 84008
2009-10-13 18:57:27 +00:00
Devang Patel 78cb102490 Do not write empty METADATA_ATTACHMENT record.
llvm-svn: 84006
2009-10-13 18:51:28 +00:00
Devang Patel 0b26c9e0b3 Remove unnecessary assert.
llvm-svn: 84004
2009-10-13 18:51:03 +00:00
Benjamin Kramer a8d176d62f Update the other CMake file.
llvm-svn: 84003
2009-10-13 18:50:54 +00:00
Devang Patel 52b1745a96 Parse GEP with attached custom metadata. This happens during libprofile_rt.bca build.
llvm-svn: 84002
2009-10-13 18:49:55 +00:00
Ted Kremenek 113d959f1b Update CMake file.
llvm-svn: 84001
2009-10-13 18:48:07 +00:00
Evan Cheng f1f3dd3c3c Refactor some code. No functionality changes.
llvm-svn: 84000
2009-10-13 18:42:04 +00:00
Dan Gohman 54463e837a Commit the removal of this file, which is now moved to lib/Analysis.
llvm-svn: 83999
2009-10-13 18:37:20 +00:00
Dan Gohman 4552e3cd73 Move the InlineCost code from Transforms/Utils to Analysis.
llvm-svn: 83998
2009-10-13 18:30:07 +00:00
Dan Gohman 5b3e05bcaa Start refactoring the inline cost estimation code so that it can be used
for purposes other than inlining.

llvm-svn: 83997
2009-10-13 18:24:11 +00:00
Chris Lattner 19788ca686 change simplifycfg to not duplicate 'unwind' instructions. Hopefully
this will increase the likelihood of common code getting sunk towards
the unwind.

llvm-svn: 83996
2009-10-13 18:13:05 +00:00
Dan Gohman 71ca652475 Make LoopUnswitch's cost estimation count Instructions, rather than
BasicBlocks, so that it doesn't blindly procede in the presence of
large individual BasicBlocks. This addresses a class of code-size
expansion problems.

llvm-svn: 83992
2009-10-13 17:50:43 +00:00
Jeffrey Yasskin f98e981cd0 Make the ExecutionEngine automatically remove global mappings on when their
GlobalValue is destroyed.  Function destruction still leaks machine code and
can crash on leaked stubs, but this is some progress.

llvm-svn: 83987
2009-10-13 17:42:08 +00:00
Devang Patel c5cc659cfa "there is not any instruction with attached debug info in this module" does not mean "there is no debug info in this module". :)
llvm-svn: 83984
2009-10-13 17:35:35 +00:00
Bob Wilson 453a06e3ac Add some ARM instruction encoding bits.
Patch by Johnny Chen.

llvm-svn: 83983
2009-10-13 17:35:30 +00:00
Bob Wilson d26a26ae7e Fix regression introduced by r83894.
llvm-svn: 83982
2009-10-13 17:29:13 +00:00
Devang Patel e6f26a7415 Copy metadata when value is RAUW'd. It is debatable whether this is the right approach for custom metadata data in general. However, right now the only custom data user, "dbg", expects this behavior while FE is constructing llvm IR with debug info.
llvm-svn: 83977
2009-10-13 17:00:54 +00:00
Bob Wilson 0bc673de0d Fix a tab. Thanks to Johnny Chen for pointing it out.
llvm-svn: 83973
2009-10-13 15:27:23 +00:00
Nick Lewycky 9bc890425a Force memory use markers to have a ConstantInt for the size argument.
llvm-svn: 83960
2009-10-13 07:57:33 +00:00
Nick Lewycky e2782c7614 Teach BasicAA a little something about the atomic intrinsics: they can only
modify through the pointer they're given.

llvm-svn: 83959
2009-10-13 07:48:38 +00:00
Daniel Dunbar cdf01b5d82 Fix a -Asserts warning.
llvm-svn: 83950
2009-10-13 06:47:08 +00:00
Victor Hernandez 70e8505eb1 Memory dependence analysis was incorrectly stopping to scan for stores to a pointer at bitcast uses of a malloc call.
It should continue scanning until the malloc call, and this patch fixes that.

llvm-svn: 83931
2009-10-13 01:42:53 +00:00
Devang Patel 0f58bec599 Find enclosing subprogram info.
llvm-svn: 83922
2009-10-12 23:11:24 +00:00
Devang Patel 0af2a420cd Set default location for a function if it is not set.
llvm-svn: 83921
2009-10-12 23:10:55 +00:00
Kevin Enderby 11b32384f2 Fix two warnings about unused variables that are only used in assert() calls.
llvm-svn: 83917
2009-10-12 22:51:49 +00:00
Bob Wilson 5b07a903d4 Delete a comment that makes no sense to me. The statement that moving a CPE
before its reference is only supported on ARM has not been true for a while.
In fact, until recently, that was only supported for Thumb.  Besides that,
CPEs are always a multiple of 4 bytes in size, so inserting a CPE should have
no effect on Thumb alignment.

llvm-svn: 83916
2009-10-12 22:49:05 +00:00
Kevin Enderby 3f0b9b3db4 Fix a problem in the code where ARMAsmParser::ParseShift() second argument
should have been a pointer to a reference.

llvm-svn: 83915
2009-10-12 22:39:54 +00:00
Evan Cheng f815861591 Make licm debug message readable.
llvm-svn: 83908
2009-10-12 22:25:23 +00:00
Bob Wilson 3250e7769f Change CreateNewWater method to return NewMBB by reference.
llvm-svn: 83905
2009-10-12 21:39:43 +00:00
Bob Wilson cc121aa750 Last week, ARMConstantIslandPass was failing to converge for the
MultiSource/Benchmarks/MiBench/automotive-susan test.  The failure has
since been masked by an unrelated change (just randomly), so I don't have
a testcase for this now.  Radar 7291928.

The situation where this happened is that a constant pool entry (CPE) was
placed at a lower address than the load that referenced it.  There were in
fact 2 CPEs placed at adjacent addresses and referenced by 2 loads that were
close together in the code.  The distance from the loads to the CPEs was
right at the limit of what they could handle, so that only one of the CPEs
could be placed within range.  On every iteration, the first CPE was found
to be out of range, causing a new CPE to be inserted.  The second CPE had
been in range but the newly inserted entry pushed it too far away.  Thus the
second CPE was also replaced by a new entry, which in turn pushed the first
CPE out of range.  Etc.

Judging from some comments in the code, the initial implementation of this
pass did not support CPEs placed _before_ their references.  In the case
where the CPE is placed at a higher address, the key to making the algorithm
terminate is that new CPEs are only inserted at the end of a group of adjacent
CPEs.  This is implemented by removing a basic block from the "WaterList"
once it has been used, and then adding the newly inserted CPE block to the
list so that the next insertion will come after it.  This avoids the ping-pong
effect where CPEs are repeatedly moved to the beginning of a group of
adjacent CPEs.  This does not work when going backwards, however, because the
entries at the end of an adjacent group of CPEs are closer than the CPEs
earlier in the group.

To make this pass terminate, we need to maintain a property that changes can
only happen in some sort of monotonic fashion.  The fix used here is to require
that the CPE for a particular constant pool load can only move to lower
addresses.  This is a very simple change to the code and should not cause
any significant degradation in the results.

llvm-svn: 83902
2009-10-12 21:23:15 +00:00
Bob Wilson e4adae267e Another minor clean-up.
llvm-svn: 83897
2009-10-12 20:45:53 +00:00
Bob Wilson 196bf32ab0 Remove redundant parameter.
llvm-svn: 83894
2009-10-12 20:37:23 +00:00
Bob Wilson 3a7326e705 Use early exit to reduce indentation.
llvm-svn: 83874
2009-10-12 19:04:03 +00:00
Bob Wilson 3af34312d4 Change to return a value by reference.
llvm-svn: 83873
2009-10-12 19:01:12 +00:00
Bob Wilson c7a3cf4066 Add a typedef for an iterator.
llvm-svn: 83872
2009-10-12 18:52:13 +00:00
Dale Johannesen 06243d7bf2 Revert the kludge in 76703. I got a clean
bootstrap of FSF-style PPC, so there is some
reason to believe the original bug (which was
never analyzed) has been fixed, probably by
82266.

llvm-svn: 83871
2009-10-12 18:49:00 +00:00
Dale Johannesen 4c9f0e8f53 Fix warning.
llvm-svn: 83870
2009-10-12 18:45:32 +00:00
Jeffrey Yasskin 406ac811ab Fix http://llvm.org/PR5160, to let CallbackVHs modify other ValueHandles on the
same Value without breaking things.

llvm-svn: 83861
2009-10-12 17:43:32 +00:00
Dan Gohman 32eed95a78 Remove a redundant member variable.
llvm-svn: 83857
2009-10-12 16:44:10 +00:00
Dan Gohman a698d7ac3c Don't forget to mark RAX as live-out of the function when arranging for
it to hold the address of an sret return value, for x86-64 ABI purposes.

Also, fix the test that was originally intended to test this to actually
test it, using FileCheck.

llvm-svn: 83853
2009-10-12 16:36:12 +00:00
Nate Begeman a3ed9edd40 More heuristics for Combiner-AA. Still catches all important cases, but
compile time penalty on gnugo, the worst case in MultiSource, is down to
about 2.5% from 30%

llvm-svn: 83824
2009-10-12 05:53:58 +00:00
Edward O'Callaghan 8227b0512f Haiku porting patches, Credit to Paul Davey.
llvm-svn: 83823
2009-10-12 04:57:20 +00:00
Chris Lattner 0840c823e4 Fix PR5087, patch by Jakub Staszak!
llvm-svn: 83822
2009-10-12 04:22:44 +00:00
Chris Lattner 40cf28d6eb add some more hooks to the C bindings, patch by Kenneth Uildriks!
llvm-svn: 83821
2009-10-12 04:01:02 +00:00
Chris Lattner 8abd572dae populate instcombine's initial worklist more carefully, causing
it to visit instructions from the start of the function to the
end of the function in the first path.  This greatly speeds up
some pathological cases (e.g. PR5150).

Try #3, this time with some unneeded debug info stuff removed
which was causing dead pointers to be added to the worklist.

llvm-svn: 83818
2009-10-12 03:58:40 +00:00
Chris Lattner 8ce6b36c86 revert r83814 for now, it is making the llvm-gcc bootstrap unhappy.
llvm-svn: 83817
2009-10-11 23:56:08 +00:00
Chris Lattner 78d6310429 populate instcombine's initial worklist more carefully, causing
it to visit instructions from the start of the function to the
end of the function in the first path.  This greatly speeds up
some pathological cases (e.g. PR5150). 

llvm-svn: 83814
2009-10-11 23:17:43 +00:00
Anton Korobeynikov 4b38ce9f25 Add missed mem-mem move patterns
llvm-svn: 83812
2009-10-11 23:03:53 +00:00
Anton Korobeynikov 415c3dc501 Add MSP430 mem-mem insts support. Patch by Brian Lucas with some my refinements
llvm-svn: 83811
2009-10-11 23:03:28 +00:00
Chris Lattner 2c2deae5ac remove some harmful code that would turn an insertelement on an undef
into a shuffle even if it was used by another insertelement.  If the
visitation order of instcombine was wrong, this would turn a chain of
insertelements into a chain of shufflevectors, which was quite painful.

Since CollectShuffleElements handles these cases, the code can just
be nuked.

llvm-svn: 83810
2009-10-11 23:02:46 +00:00
Chris Lattner c6cdbfbfdd teach instcombine to simplify xor's harder, catching the
new testcase.

llvm-svn: 83799
2009-10-11 22:22:13 +00:00
Chris Lattner 6e6ac47125 cleanups
llvm-svn: 83797
2009-10-11 22:00:32 +00:00
Chris Lattner 1639234775 cleanup, no functionality change.
llvm-svn: 83795
2009-10-11 21:36:10 +00:00
Chris Lattner fd27f8a5b3 generalize a transformation even more: we don't care whether the
input the the mul is a zext from bool, just that it is all zeros
other than the low bit.  This fixes some phase ordering issues
that would cause us to miss some xforms in mul.ll when the worklist
is visited differently.

llvm-svn: 83794
2009-10-11 21:29:45 +00:00
Chris Lattner 406cb75c6b simplify a transformation by making it more general.
llvm-svn: 83792
2009-10-11 21:22:21 +00:00
Chris Lattner f39f4f928a temporarily revert previous patch
llvm-svn: 83791
2009-10-11 21:05:34 +00:00
Chris Lattner bb058d3a23 populate instcombine's initial worklist more carefully, causing
it to visit instructions from the start of the function to the
end of the function in the first path.  This greatly speeds up
some pathological cases (e.g. PR5150). 

llvm-svn: 83790
2009-10-11 21:04:37 +00:00
Torok Edwin 8b3081350e Remove CleanupDbgInfo, instcombine does this and its not worth duplicating it
here.

llvm-svn: 83789
2009-10-11 19:58:35 +00:00
Torok Edwin 907ec36943 LICM shouldn't sink/delete debug information. Fix this and add a testcase.
For now the metadata of sinked/hoisted instructions is still wrong, but that'll
be fixed when instructions will have debug metadata directly attached.

llvm-svn: 83786
2009-10-11 19:15:54 +00:00
Anton Korobeynikov 6bce6bbf40 Implement 'm' memory operand properly
llvm-svn: 83785
2009-10-11 19:14:21 +00:00
Anton Korobeynikov a58a3f930a Implement proper asmprinting for the globals. This eliminates bogus "call" modifier and also adds support for offsets wrt globals.
llvm-svn: 83784
2009-10-11 19:14:02 +00:00
Anton Korobeynikov 3525a4a268 Implement asm printing for inline asm memory operands
llvm-svn: 83783
2009-10-11 19:13:34 +00:00
Chris Lattner 85c85c5e04 when folding duplicate conditions, delete the
now-probably-dead instruction tree feeding it.

llvm-svn: 83778
2009-10-11 18:39:58 +00:00
Chris Lattner e374382b8f implement rdar://7293527, a trivial instcombine that llvm-gcc
gets but clang doesn't, because it is implemented in GCC's
fold routine.

llvm-svn: 83761
2009-10-11 07:53:15 +00:00
Chris Lattner 97b1405207 implement a transformation in jump threading that is currently
done by condprop, but do it in a much more general form.  The
basic idea is that we can do a limited form of tail duplication
in the case when we have a branch on a phi.  Moving the branch
up in to the predecessor block makes instruction selection
much easier and encourages chained jump threadings.

llvm-svn: 83759
2009-10-11 07:24:57 +00:00
Chris Lattner 6ce85e85f5 restructure some code, no functionality change.
llvm-svn: 83756
2009-10-11 04:40:21 +00:00
Chris Lattner f466bc84c9 factor some code better and move a function, no functionality change.
llvm-svn: 83755
2009-10-11 04:33:43 +00:00
Chris Lattner f99a74e24b make jump threading on a phi with undef inputs happen.
llvm-svn: 83754
2009-10-11 04:18:15 +00:00
Chris Lattner 71d353dd48 rewrite LCSSA to use SSAUpdate, to only return true if it modifies
the IR, and to implement the FIXME'd optimization.

llvm-svn: 83748
2009-10-11 02:53:37 +00:00
Chris Lattner 101dde30ed clean up and simplify some code. Don't use setvector when things will be
inserted only once, just use vector.  Don't compute ExitBlocks unless we
need it, change std::sort to array_pod_sort.

llvm-svn: 83747
2009-10-11 01:07:15 +00:00
Chris Lattner b6c65faa64 switch GVN to use SSAUpdater. Besides removing a lot of complexity
from GVN, this also speeds it up, inserts fewer PHI nodes (see the
testcase) and allows it to remove more loads (due to fewer PHI nodes
standing in the way).

llvm-svn: 83746
2009-10-10 23:50:30 +00:00
Chris Lattner 9c382cebc5 add a simple helper method.
llvm-svn: 83745
2009-10-10 23:41:48 +00:00
Chris Lattner 249265de06 add ability for clients of SSAUpdater to find out about the
PHI nodes inserted.

llvm-svn: 83744
2009-10-10 23:15:24 +00:00
Chris Lattner 89d2a5c4f3 remove dead code
llvm-svn: 83742
2009-10-10 23:04:12 +00:00
Chris Lattner 67cdd8b567 add the ability to get a rewritten value from the middle of a block,
not just at the end.  Add a big comment explaining when this could
be useful (which never happens for jump threading).

llvm-svn: 83741
2009-10-10 23:00:11 +00:00
Chris Lattner e474a8d3a7 rename GetValueInBlock -> GetValueAtEndOfBlock to better reflect
what it does.

llvm-svn: 83740
2009-10-10 22:41:58 +00:00
Anton Korobeynikov 5b8826b4da It seems that OR operation does not affect status reg at all.
Remove impdef of SRW. This fixes PR4779

llvm-svn: 83739
2009-10-10 22:17:47 +00:00
Chris Lattner 65e69a77e1 use a typedef instead of spelling out an insane type. Yay for auto someday.
llvm-svn: 83707
2009-10-10 09:09:20 +00:00
Chris Lattner 84095071ea Change jump threading to use the new SSAUpdater class instead of
DemoteRegToStack.  This makes it more efficient (because it isn't
creating a ton of load/stores that are eventually removed by a later
mem2reg), and more slightly more effective (because those load/stores
don't get in the way of threading).

llvm-svn: 83706
2009-10-10 09:05:58 +00:00
Chris Lattner 60d4e69c81 Implement an efficient and fully general SSA update mechanism that
works on unstructured CFGs.  This implements PR217, our oldest open PR.

llvm-svn: 83705
2009-10-10 09:04:27 +00:00
Chris Lattner f30a2b0c86 random tidying
llvm-svn: 83701
2009-10-10 06:22:45 +00:00
Dan Gohman b8120770b4 Create a new InstrEmitter class for translating SelectionDAG nodes
into MachineInstrs. This is mostly just moving the code from
ScheduleDAGSDNodesEmit.cpp into a new class. This decouples MachineInstr
emitting from scheduling.

llvm-svn: 83699
2009-10-10 01:32:21 +00:00