Commit Graph

14161 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
6501ea2557 Prefer cheap registers for busy live ranges.
On the x86-64 and thumb2 targets, some registers are more expensive to encode
than others in the same register class.

Add a CostPerUse field to the TableGen register description, and make it
available from TRI->getCostPerUse. This represents the cost of a REX prefix or a
32-bit instruction encoding required by choosing a high register.

Teach the greedy register allocator to prefer cheap registers for busy live
ranges (as indicated by spill weight).

llvm-svn: 129864
2011-04-20 18:19:48 +00:00
Stuart Hastings
a552942e02 ARM byval support. Will be enabled by another patch to the FE. <rdar://problem/7662569>
llvm-svn: 129858
2011-04-20 16:47:52 +00:00
Justin Holewinski
dc1965a16c PTX: Add intrinsics to list of built-in intrinsics, which allows them to be
used by Clang.  To help Clang integration, the PTX target has been split
     into two targets: ptx32 and ptx64, depending on the desired pointer size.

- Add GCCBuiltin class to all intrinsics
- Split PTX target into ptx32 and ptx64

llvm-svn: 129851
2011-04-20 15:37:17 +00:00
Rafael Espindola
09e9797728 Remove unused arguments.
llvm-svn: 129844
2011-04-20 03:08:09 +00:00
Daniel Dunbar
82a4062a4e ADT/Triple: Renambe isOSX... methods to isMacOSX for consistency with the OS
triple component.

llvm-svn: 129838
2011-04-20 00:14:25 +00:00
Daniel Dunbar
3f19424547 ADT/Triple: Drop support for -osx style triples, we are going with -macosx
instead.

llvm-svn: 129836
2011-04-19 23:55:20 +00:00
Daniel Dunbar
6af8a09825 ADT/Triple: Add support for Triple::MacOSX per feedback from Chris, will remove
Triple::OSX once Clang has moved.

llvm-svn: 129833
2011-04-19 23:34:12 +00:00
Daniel Dunbar
9934e8436d ADT/Triple: Add isOSDarwin() and isOSWindows() helper functions.
llvm-svn: 129815
2011-04-19 21:12:05 +00:00
Chris Lattner
649aa9aa1e add a helper method.
llvm-svn: 129806
2011-04-19 20:47:57 +00:00
Daniel Dunbar
1e1f05faeb ADT/Triple: Add helper function for OS X version checks.
llvm-svn: 129801
2011-04-19 20:30:10 +00:00
Daniel Dunbar
6f283d346f ADT/Triple: Add isOSVersionLT helper function.
llvm-svn: 129800
2011-04-19 20:30:07 +00:00
Daniel Dunbar
e24d3d1bc5 ADT/Triple: Generalize and simplify getDarwinNumber to just be getOSVersion.
llvm-svn: 129799
2011-04-19 20:24:34 +00:00
Daniel Dunbar
ce4e39d010 ADT/Triple: Add support for more explicit "osx" and "ios" OS names.
llvm-svn: 129798
2011-04-19 20:19:27 +00:00
Bob Wilson
886994b683 Avoid write-after-write issue hazards for Cortex-A9.
Add a avoidWriteAfterWrite() target hook to identify register classes that
suffer from write-after-write hazards. For those register classes, try to avoid
writing the same register in two consecutive instructions.

This is currently disabled by default.  We should not spill to avoid hazards!
The command line flag -avoid-waw-hazard can be used to enable waw avoidance.

llvm-svn: 129772
2011-04-19 18:11:45 +00:00
Ted Kremenek
7cac5a8369 Add BumpPtrAllocator::getTotalMemory() to allow clients to query how much memory a BumpPtrAllocator allocated.
llvm-svn: 129727
2011-04-18 22:44:46 +00:00
Devang Patel
7220c1a021 Reduce clutter in asm output. Do not emit source location as comment for each instruction.
llvm-svn: 129715
2011-04-18 20:26:49 +00:00
Anders Carlsson
ecdeb82a35 Make the empty StructType::get overload use an empty ArrayRef.
llvm-svn: 129696
2011-04-18 14:02:06 +00:00
Chris Lattner
a473329704 Add a new bit that ImmLeaf's can opt into, which allows them to duck out of
the generated FastISel.  X86 doesn't need to generate code to match ADD16ri8 
since ADD16ri will do just fine.  This is a small codesize win in the generated
instruction selector.

llvm-svn: 129692
2011-04-18 06:36:55 +00:00
Eli Friedman
819c450b25 Make the StringMaps attached to MCContext use the MCContext's allocator;
reduces the number of calls to malloc().

llvm-svn: 129687
2011-04-18 05:02:31 +00:00
Anders Carlsson
fd5d85404e Use an empty ArrayRef instead of an empty std::vector for the Function::get overload that takes no parameters.
llvm-svn: 129686
2011-04-18 04:55:06 +00:00
Chris Lattner
7ca810dd13 since the VT is fixed for a ImmLeaf, there is no reason to expose it to the matching code.
llvm-svn: 129677
2011-04-17 22:17:27 +00:00
Chris Lattner
2d89feb795 now that predicates have a decent abstraction layer on them, introduce a new
kind of predicate: one that is specific to imm nodes.  The predicate function
specified here just checks an int64_t directly instead of messing around with
SDNode's.  The virtue of this is that it means that fastisel and other things
can reason about these predicates.

llvm-svn: 129675
2011-04-17 22:05:17 +00:00
Chris Lattner
d776e76c44 Rework our internal representation of node predicates to expose more
structure and fix some fixmes.  We now have a TreePredicateFn class
that handles all of the decoding of these things.  This is an internal
cleanup that has no impact on the code generated by tblgen.

llvm-svn: 129670
2011-04-17 21:38:24 +00:00
Chris Lattner
5e00f501ff Fix rdar://9289512 - not folding load into compare at -O0
The basic issue here is that bottom-up isel is matching the branch
and compare, and was failing to fold the load into the branch/compare
combo.  Fixing this (by allowing folding into any instruction of a
sequence that is selected) allows us to produce things like:


cmpb    $0, 52(%rax)
je      LBB4_2

instead of:

movb    52(%rax), %cl
cmpb    $0, %cl
je      LBB4_2

This makes the generated -O0 code run a bit faster, but also speeds up
compile time by putting less pressure on the register allocator and 
generating less code.

This was one of the biggest classes of missing load folding.  Implementing
this shrinks 176.gcc's c-decl.s (as a random example) by about 4% in (verbose-asm)
line count.

llvm-svn: 129656
2011-04-17 06:35:44 +00:00
Rafael Espindola
9e5aaa3b78 Put each personality function in a section. This fixes the gnu ld warning:
error in foo.o; no .eh_frame_hdr table will be created.

llvm-svn: 129635
2011-04-16 03:51:21 +00:00
Nick Lewycky
9aeaafc27a Rename LineProfiling to GCOVProfiling to more accurately represent what it
does. Also mostly implement it. Still a work-in-progress, but generates legal
output on crafted test cases.

llvm-svn: 129630
2011-04-16 01:20:23 +00:00
Devang Patel
eddab1d186 Introduce support to encode Objective-C property information in debugging information generated for an interface.
llvm-svn: 129624
2011-04-16 00:11:51 +00:00
Rafael Espindola
694ad2f25c Some refactoring suggested by Anton Korobeynikov.
llvm-svn: 129600
2011-04-15 20:32:03 +00:00
Evan Cheng
e33e4028a6 Increase SubtargetFeatureKV Value and Implies fields to 64 bits since some targets are getting very close to 32 subtarget features. Also teach tablegen to error when there are more than 64 features to guard against undefined behavior. rdar://9282332
llvm-svn: 129590
2011-04-15 19:35:46 +00:00
Lenny Maiorani
dfae65d305 Implements StringRef::compare with bounds. It is behaves similarly to strncmp(). Unit tests also included.
llvm-svn: 129582
2011-04-15 17:56:50 +00:00
Rafael Espindola
99831068c8 Add 129518 back with a fix for when we are producing eh just because of debug info.
Change ELF systems to use CFI for producing the EH tables. This reduces the
size of the clang binary in Debug builds from 690MB to 679MB.

llvm-svn: 129571
2011-04-15 15:11:06 +00:00
Chris Lattner
0304b82f80 Fix a ton of comment typos found by codespell. Patch by
Luis Felipe Strano Moraes!

llvm-svn: 129558
2011-04-15 05:18:47 +00:00
NAKAMURA Takumi
7aed456653 Revert r129518, "Change ELF systems to use CFI for producing the EH tables. This reduces the"
It broke several builds.

llvm-svn: 129557
2011-04-15 03:35:57 +00:00
Michael J. Spencer
05b07faeaf Add 3DNow! intrinsics.
llvm-svn: 129551
2011-04-15 00:32:41 +00:00
Rafael Espindola
d5eed657e2 Change ELF systems to use CFI for producing the EH tables. This reduces the
size of the clang binary in Debug builds from 690MB to 679MB.

llvm-svn: 129518
2011-04-14 15:18:53 +00:00
Michael J. Spencer
9c5e660612 Fix whitespace and tabs.
llvm-svn: 129517
2011-04-14 14:33:36 +00:00
Andrew Trick
e89c19ab7b In the pre-RA scheduler, maintain cmp+br proximity.
This is done by pushing physical register definitions close to their
use, which happens to handle flag definitions if they're not glued to
the branch. This seems to be generally a good thing though, so I
didn't need to add a target hook yet.

The primary motivation is to generate code closer to what people
expect and rule out missed opportunity from enabling macro-op
fusion. As a side benefit, we get several 2-5% gains on x86
benchmarks. There is one regression:
SingleSource/Benchmarks/Shootout/lists slows down be -10%. But this is
an independent scheduler bug that will be tracked separately.
See rdar://problem/9283108.

Incidentally, pre-RA scheduling is only half the solution. Fixing the
later passes is tracked by:
<rdar://problem/8932804> [pre-RA-sched] on x86, attempt to schedule CMP/TEST adjacent with condition jump

Fixes:
<rdar://problem/9262453> Scheduler unnecessary break of cmp/jump fusion

llvm-svn: 129508
2011-04-14 05:15:06 +00:00
Bill Wendling
500b41a7a5 Add an option to not print the alias of an instruction. It defaults to "print
the alias".

llvm-svn: 129485
2011-04-13 23:36:21 +00:00
Nick Lewycky
80f6aaa390 Use positive values since the value type is unsigned. Fixes a warning on the
llvm-gcc-native-mingw32 builder.

llvm-svn: 129457
2011-04-13 18:46:22 +00:00
Junjie Gu
920274b4dd Passing unroll parameters (unroll-count, threshold, and partial unroll) via LoopUnroll class's ctor. Doing so
will allow multiple context with different loop unroll parameters to run.  This is a minor change and no effect 
on existing application.

llvm-svn: 129449
2011-04-13 16:15:29 +00:00
Rafael Espindola
3a5e7bd46f Add the alias analysis to the C api.
llvm-svn: 129447
2011-04-13 15:44:58 +00:00
Jay Foad
c29ba4ecd6 PR9214: Convert ConstantExpr::getIndices() to return an ArrayRef, plus
related tweaks to ExprMapKeyType.

llvm-svn: 129443
2011-04-13 15:22:40 +00:00
Jay Foad
5dc08f26fc Remove some redundant llvm:: prefixes.
llvm-svn: 129441
2011-04-13 14:39:42 +00:00
Jay Foad
f78cb4dfa4 Fix a comment.
llvm-svn: 129440
2011-04-13 13:48:09 +00:00
Jay Foad
9bd6e1956b PR9214: Convert ConstantExpr::getWithOperands() to use ArrayRef.
llvm-svn: 129439
2011-04-13 13:46:01 +00:00
Jay Foad
35b9144371 Fix typo in comment.
llvm-svn: 129436
2011-04-13 12:50:47 +00:00
Jay Foad
b215137166 Like the coding standards say, do not use "using namespace std".
llvm-svn: 129435
2011-04-13 12:46:01 +00:00
Andrew Trick
916e01c917 Recommit r129383. PreRA scheduler heuristic fixes: VRegCycle, TokenFactor latency.
Additional fixes:
Do something reasonable for subtargets with generic
itineraries by handle node latency the same as for an empty
itinerary. Now nodes default to unit latency unless an itinerary
explicitly specifies a zero cycle stage or it is a TokenFactor chain.

Original fixes:
UnitsSharePred was a source of randomness in the scheduler: node
priority depended on the queue data structure. I rewrote the recent
VRegCycle heuristics to completely replace the old heuristic without
any randomness. To make the ndoe latency adjustments work, I also
needed to do something a little more reasonable with TokenFactor. I
gave it zero latency to its consumers and always schedule it as low as
possible.

llvm-svn: 129421
2011-04-13 00:38:32 +00:00
Bill Wendling
0984f4927e Reapply r129401 with patch for clang.
llvm-svn: 129419
2011-04-13 00:36:11 +00:00
Rafael Espindola
63f8a9ad72 Be consistent about being virtual and returning void in the cfi methods.
Implement the ones that were missing in the asm streamer.

llvm-svn: 129413
2011-04-12 23:59:07 +00:00
Bill Wendling
f6446a0961 Revert r129401 for now. Clang is using the old way of doing things.
llvm-svn: 129403
2011-04-12 22:59:27 +00:00
Bill Wendling
f9c9d3e05b Remove the unaligned load intrinsics in favor of using native unaligned loads.
Now that we have a first-class way to represent unaligned loads, the unaligned
load intrinsics are superfluous.

First part of <rdar://problem/8460511>.

llvm-svn: 129401
2011-04-12 22:46:31 +00:00
Jim Grosbach
ae80577a24 MCJIT lazy relocation resolution and symbol address re-assignment.
Add handling for tracking the relocations on symbols and resolving them.
Keep track of the relocations even after they are resolved so that if
the RuntimeDyld client moves the object, it can update the address and any
relocations to that object will be updated.

For our trival object file load/run test harness (llvm-rtdyld), this enables
relocations between functions located in the same object module. It should
be trivially extendable to load multiple objects with mutual references.

As a simple example, the following now works (running on x86_64 Darwin 10.6):


$ cat t.c
int bar() {
  return 65;
}

int main() {
  return bar();
}
$ clang t.c -fno-asynchronous-unwind-tables -o t.o -c
$ otool -vt t.o
t.o:
(__TEXT,__text) section
_bar:
0000000000000000  pushq %rbp
0000000000000001  movq  %rsp,%rbp
0000000000000004  movl  $0x00000041,%eax
0000000000000009  popq  %rbp
000000000000000a  ret
000000000000000b  nopl  0x00(%rax,%rax)
_main:
0000000000000010  pushq %rbp
0000000000000011  movq  %rsp,%rbp
0000000000000014  subq  $0x10,%rsp
0000000000000018  movl  $0x00000000,0xfc(%rbp)
000000000000001f  callq 0x00000024
0000000000000024  addq  $0x10,%rsp
0000000000000028  popq  %rbp
0000000000000029  ret
$ llvm-rtdyld t.o -debug-only=dyld ; echo $?
Function sym: '_bar' @ 0
Function sym: '_main' @ 16
Extracting function: _bar from [0, 15]
    allocated to 0x100153000
Extracting function: _main from [16, 41]
    allocated to 0x100154000
Relocation at '_main' + 16 from '_bar(Word1: 0x2d000000)
Resolving relocation at '_main' + 16 (0x100154010) from '_bar (0x100153000)(pcrel, type: 2, Size: 4).
loaded '_main' at: 0x100154000
65
$

llvm-svn: 129388
2011-04-12 21:20:41 +00:00
Rafael Espindola
9f6146c464 Remove LastOffset from the asm parser.
llvm-svn: 129378
2011-04-12 18:53:30 +00:00
Rafael Espindola
5c5bb3e9a6 Fix the case of a .cfi_rel_offset before any .cfi_def_cfa_offset.
llvm-svn: 129362
2011-04-12 16:12:03 +00:00
Rafael Espindola
7c4de15c7b Implement .cfi_same_value.
llvm-svn: 129361
2011-04-12 15:31:05 +00:00
Nick Lewycky
cbe911f7d8 Add support for line profiling. Very work-in-progress.
Use debug info in the IR to find the directory/file:line:col. Each time that location changes, bump a counter.

Unlike the existing profiling system, we don't try to look at argv[], and thusly don't require main() to be present in the IR. This matches GCC's technique where you specify the profiling flag when producing each .o file.

The runtime library is minimal, currently just calling printf at program shutdown time. The API is designed to make it possible to emit GCOV data later on.

llvm-svn: 129340
2011-04-12 01:06:09 +00:00
Nick Lewycky
7ee6960a5f Make IRBuilder support StringRef for building strings.
Also document that the global variables produced are mergable.

llvm-svn: 129330
2011-04-12 00:29:07 +00:00
Jim Grosbach
17ca2afa04 Tidy up a bit now that we're using the MemoryManager interface.
llvm-svn: 129328
2011-04-12 00:23:32 +00:00
Chris Lattner
2e4621a4a6 remove the StructRetPromotion pass. It is unused, not maintained and
has some bugs.  If this is interesting functionality, it should be 
reimplemented in the argpromotion pass.

llvm-svn: 129314
2011-04-11 23:09:44 +00:00
Jakob Stoklund Olesen
a1ffedb740 Skip a binary search when possible.
llvm-svn: 129293
2011-04-11 20:01:44 +00:00
Kevin Enderby
6e09a5d065 Adding support for printing operands symbolically to llvm's public 'C'
disassembler API.  Hooked this up to the ARM target so such tools as Darwin's
otool(1) can now print things like branch targets for example this:
  blx _puts
instead of this:
  blx #-36
And even print the expression encoded in the Mach-O relocation entried for
things like this:
  movt r0, :upper16:((_foo-_bar)+1234)

llvm-svn: 129284
2011-04-11 18:08:50 +00:00
Jay Foad
7717c670bb Fix or remove code which seemed to think that the operand of a Constant
was always a User.

llvm-svn: 129272
2011-04-11 09:48:55 +00:00
Jay Foad
0d5ca4cf44 Don't include Operator.h from InstrTypes.h.
llvm-svn: 129271
2011-04-11 09:35:34 +00:00
Bill Wendling
12f5828e1e Revert r129235 pending a vetting of the EH rewrite.
--- Reverse-merging r129235 into '.':
D    test/Feature/bb_attrs.ll
U    include/llvm/BasicBlock.h
U    include/llvm/Bitcode/LLVMBitCodes.h
U    lib/VMCore/AsmWriter.cpp
U    lib/VMCore/BasicBlock.cpp
U    lib/AsmParser/LLParser.cpp
U    lib/AsmParser/LLLexer.cpp
U    lib/AsmParser/LLToken.h
U    lib/Bitcode/Reader/BitcodeReader.cpp
U    lib/Bitcode/Writer/BitcodeWriter.cpp

llvm-svn: 129259
2011-04-10 23:18:04 +00:00
Bill Wendling
62d49461b6 Beginning of the Great Exception Handling Rewrite.
* Add a "landing pad" attribute to the BasicBlock.
* Modify the bitcode reader and writer to handle said attribute.

Later: The verifier will ensure that the landing pad attribute is used in the
appropriate manner. I.e., not applied to the entry block, and applied only to
basic blocks that are branched to via a `dispatch' instruction.

(This is a work-in-progress.)

llvm-svn: 129235
2011-04-10 00:04:27 +00:00
Chris Lattner
7605c67ada drive by bug fix: DenseMapInfo::isEqual should be determined according to
isEqual of its members, not operator==.

llvm-svn: 129233
2011-04-09 21:20:23 +00:00
Eli Friedman
d3b1c5df33 PR9604; try to deal with RAUW updates correctly in the AST. I'm not convinced
it's completely safe to cache the AST across LICM runs even with this fix,
but this fix can't hurt.

llvm-svn: 129198
2011-04-09 06:55:46 +00:00
Chris Lattner
5a8b1f1ec5 fix a potentially serious bug in AliasSet::removeCallSite
where we shrunk the list without updating the end iterator.
By inspection, from PR9639.  

llvm-svn: 129190
2011-04-09 05:51:34 +00:00
Jakob Stoklund Olesen
5add6d16b7 Build the Hopfield network incrementally when splitting global live ranges.
It is common for large live ranges to have few basic blocks with register uses
and many live-through blocks without any uses. This approach grows the Hopfield
network incrementally around the use blocks, completely avoiding checking
interference for some through blocks.

llvm-svn: 129188
2011-04-09 02:59:09 +00:00
Chris Lattner
8018f67b28 fix doc comment bug, noticed by Jochen
llvm-svn: 129186
2011-04-09 02:33:29 +00:00
Evan Cheng
bc053100af Change -arm-trap-func= into a non-arm specific option. Now Intrinsic::trap is lowered into a call to the specified trap function at sdisel time.
llvm-svn: 129152
2011-04-08 21:37:21 +00:00
Jim Grosbach
bf66067333 Refactor MCJIT 32-bit section loading.
Teach 32-bit section loading to use the Memory Manager interface, just like
the 64-bit loading does. Tidy up a few other things here and there.

llvm-svn: 129138
2011-04-08 17:31:24 +00:00
Bill Wendling
342ba5c4b6 Replace the old algorithm that emitted the "print the alias for an instruction"
with the newer, cleaner model. It uses the IAPrinter class to hold the
information that is needed to match an instruction with its alias. This also
takes into account the available features of the platform.

There is one bit of ugliness. The way the logic determines if a pattern is
unique is O(N**2), which is gross. But in reality, the number of items it's
checking against isn't large. So while it's N**2, it shouldn't be a massive time
sink.

llvm-svn: 129110
2011-04-07 21:20:06 +00:00
Andrew Trick
36a1759769 Added a check in the preRA scheduler for potential interference on a
induction variable. The preRA scheduler is unaware of induction vars,
so we look for potential "virtual register cycles" instead.

Fixes <rdar://problem/8946719> Bad scheduling prevents coalescing

llvm-svn: 129100
2011-04-07 19:54:57 +00:00
Rafael Espindola
a13eab4837 Expose more passes to the C API.
llvm-svn: 129087
2011-04-07 18:20:46 +00:00
Evan Cheng
859dff2c87 Change -arm-divmod-libcall to a target neutral option.
llvm-svn: 129045
2011-04-07 00:58:44 +00:00
Nick Lewycky
fccee4ca24 Add support for ArrayRef in IRBuilder's CreateCall.
llvm-svn: 129039
2011-04-07 00:03:25 +00:00
Nick Lewycky
a980fa69e8 Fix typo in doxy-comment.
llvm-svn: 129028
2011-04-06 20:54:07 +00:00
Nick Lewycky
f2d78099ce Replace const std::vector& with ArrayRef in the type creation APIs.
llvm-svn: 129024
2011-04-06 20:28:34 +00:00
Jim Grosbach
b966c26bc9 EngineBuilder setter method for UseMCJIT was missing return value.
llvm-svn: 129008
2011-04-06 16:35:19 +00:00
Nick Lewycky
e15c6c11b4 Add an empty key for DebugLoc so that you can store an empty DebugLoc in a
DenseMap.

llvm-svn: 128994
2011-04-06 06:49:59 +00:00
Nick Lewycky
dfed8e0ff5 Support using DebugLoc's in a DenseMap.
llvm-svn: 128988
2011-04-06 05:36:52 +00:00
Jim Grosbach
8a1f712b53 RuntimeDyld should use the memory manager API.
Start teaching the runtime Dyld interface to use the memory manager API
for allocating space. Rather than mapping directly into the MachO object,
we extract the payload for each object and copy it into a dedicated buffer
allocated via the memory manager. For now, just do Segment64, so this works
on x86_64, but not yet on ARM.

llvm-svn: 128973
2011-04-06 01:11:05 +00:00
Chandler Carruth
4e7b7e7732 Make the virtual destructor out-of-line so we have a key function.
llvm-svn: 128964
2011-04-05 23:54:31 +00:00
Chandler Carruth
715cc35206 Provide an empty virtual destructor to go with the virtual methods in
this class. Clang was warning on this with -Wnon-virtual-dtor.

llvm-svn: 128952
2011-04-05 23:03:24 +00:00
Devang Patel
03d0891c10 Add support to encode function's template parameters.
llvm-svn: 128947
2011-04-05 22:52:06 +00:00
Chris Lattner
a2345ee59d remove postdom frontiers, because it is dead. Forward dom frontiers are
still used by RegionInfo :(

llvm-svn: 128943
2011-04-05 21:57:17 +00:00
Andrew Trick
f275156c40 Fix a typo.
llvm-svn: 128912
2011-04-05 19:13:11 +00:00
Andrew Trick
7e2e555075 Added *hidden* flags -print-options and -print-all-options so
developers can see if their driver changed any cl::Option's. The
current implementation isn't perfect but handles most kinds of
options. This is nice to have when decomposing the stages of
compilation and moving between different drivers. It's also a good
sanity check when comparing results produced by different command line
invocations that are expected to produce the comparable results.

Note: This is not an attempt to prolong the life of cl::Option. On the
contrary, it's a placeholder for a feature that must exist when
cl::Option is replaced by a more appropriate framework. A new
framework needs: a central option registry, dynamic name lookup,
non-global containers of option values (e.g. per-module,
per-function), *and* the ability to print options values and their defaults at
any point during compilation.

llvm-svn: 128910
2011-04-05 18:54:36 +00:00
Jakob Stoklund Olesen
731b0d77a2 Use std::unique instead of a SmallPtrSet to ensure unique instructions in UseSlots.
This allows us to always keep the smaller slot for an instruction which is what
we want when a register has early clobber defines.

Drop the UsingInstrs set and the UsingBlocks map. They are no longer needed.

llvm-svn: 128886
2011-04-05 15:18:18 +00:00
Jakob Stoklund Olesen
65c8f18b8d Cache the fairly expensive last split point computation and provide a fast
inlined path for the common case.

Most basic blocks don't contain a call that may throw, so the last split point
os simply the first terminator.

llvm-svn: 128874
2011-04-05 04:20:27 +00:00
Bill Wendling
a8db395dc1 Revamp the SjLj "dispatch setup" intrinsic.
It needed to be moved closer to the setjmp statement, because the code directly
after the setjmp needs to know about values that are on the stack. Also, the
'bitcast' of the function context was causing a dead load. This wouldn't be too
horrible, except that at -O0 it wasn't optimized out, and because it wasn't
using the correct base pointer (if there is a VLA), it would try to access a
value from a garbage address.
<rdar://problem/9130540>

llvm-svn: 128873
2011-04-05 01:37:43 +00:00
Jim Grosbach
b4624c7d62 Layer the memory manager between the JIT and the runtime Dyld.
The JITMemory manager references LLVM IR constructs directly, while the
runtime Dyld works at a lower level and can handle objects which may not
originate from LLVM IR. Introduce a new layer for the memory manager to
handle the interface between them. For the MCJIT, this layer will be almost
entirely simply a call-through w/ translation between the IR objects and
symbol names.

llvm-svn: 128851
2011-04-04 23:04:39 +00:00
Jakob Stoklund Olesen
78d65c6632 Stop caching basic block index ranges now that SlotIndexes can keep up.
llvm-svn: 128821
2011-04-04 15:32:15 +00:00
Tobias Grosser
df319b5f91 Region: Allow user control the printing style of the print function.
Contributed by: etherzhhb@gmail.com

llvm-svn: 128808
2011-04-04 07:19:18 +00:00
Peter Collingbourne
44b69879c2 IntrusiveRefCntPtr: in RefCountedBase and RefCountedBaseVPTR, make
ref_cnt mutable and Retain/Release const to enable reference counted
pointers to const objects

llvm-svn: 128804
2011-04-04 00:57:03 +00:00
Eric Christopher
8bfe1d2deb Start migrating mach-o dumping facilities to the object file out of a
separate executable.

llvm-svn: 128801
2011-04-03 23:51:47 +00:00
Eric Christopher
e0faa57f96 Add a set of C bindings for the Object interface.
Patch by Patrick Walton!

llvm-svn: 128798
2011-04-03 22:34:07 +00:00
Frits van Bommel
4efc489131 Remove the LLVMContext& arguments from *Folder constructors, as they don't seem to be used anywhere.
llvm-svn: 128793
2011-04-03 19:46:28 +00:00
Eli Friedman
8b6d220330 PR9446: RecursivelyDeleteTriviallyDeadInstructions can delete the instruction
after the given instruction; make sure to handle that case correctly.
(It's difficult to trigger; the included testcase involves a dead 
block, but I don't think that's a requirement.) 

While I'm here, get rid of the unnecessary warning about
SimplifyInstructionsInBlock, since it should work correctly as far as I know.

llvm-svn: 128782
2011-04-02 22:45:17 +00:00
Jakob Stoklund Olesen
f881310607 Add an InterferenceCache class for caching per-block interference ranges.
When the greedy register allocator is splitting multiple global live ranges, it
tends to look at the same interference data many times. The InterferenceCache
class caches queries for unaltered LiveIntervalUnions.

llvm-svn: 128764
2011-04-02 06:03:35 +00:00
Jakob Stoklund Olesen
024a1de4ae Use basic block numbers as indexes when mapping slot index ranges.
This is more compact and faster than using DenseMap.

llvm-svn: 128763
2011-04-02 06:03:31 +00:00
Cameron Zwarich
2748634089 Add a RemoveFromWorklist method to DCI. This is needed to do some complicated
transformations in target-specific DAG combines without causing DAGCombiner to
delete the same node twice. If you know of a better way to avoid this (see my
next patch for an example), please let me know.

llvm-svn: 128758
2011-04-02 02:40:26 +00:00
Jay Foad
279116b009 Various Instructions' resizeOperands() methods are only used to grow the
list of operands. Simplify and rename them accordingly.

llvm-svn: 128708
2011-04-01 08:00:58 +00:00
Evan Cheng
39574b2766 Issue libcalls __udivmod*i4 / __divmod*i4 for div / rem pairs.
rdar://8911343

llvm-svn: 128696
2011-04-01 00:42:02 +00:00
Richard Osborne
5b9df0d075 Add XCore intrinsics for initializing / starting / synchronizing threads.
llvm-svn: 128633
2011-03-31 15:13:13 +00:00
Michael J. Spencer
b127b18668 Fix whitespace.
llvm-svn: 128631
2011-03-31 13:06:39 +00:00
Michael J. Spencer
c96db7725b Switch FileRemover from PathV1 to V2.
llvm-svn: 128630
2011-03-31 13:04:19 +00:00
Jim Grosbach
b3ee25627c Tidy up. Whitespace and 80-columns.
llvm-svn: 128583
2011-03-30 22:38:13 +00:00
Jakob Stoklund Olesen
b5c875d574 Don't add the same analysis implementation pair twice.
Prevent infinite growth of the list.

Patch by José Fonseca!

llvm-svn: 128568
2011-03-30 18:32:53 +00:00
Jakob Stoklund Olesen
37134e568d Reset StringMap's NumTombstones on clears and rehashes.
StringMap was not properly updating NumTombstones after a clear or rehash.

This was not fatal until now because the table was growing faster than
NumTombstones could, but with the previous change of preventing infinite
growth of the table the invariant (NumItems + NumTombstones <= NumBuckets)
stopped being observed, causing infinite loops in certain situations.

Patch by José Fonseca!

llvm-svn: 128567
2011-03-30 18:32:51 +00:00
Jakob Stoklund Olesen
b4df99dc06 Prevent infinite growth of SmallPtrSet instances.
Rehash but don't grow when full of tombstones.

Patch by José Fonseca!

llvm-svn: 128566
2011-03-30 18:32:48 +00:00
Jakob Stoklund Olesen
0daa5f56cb Prevent infinite growth of SmallMap instances.
Rehash but don't grow when full of tombstones.

Patch by José Fonseca!

llvm-svn: 128565
2011-03-30 18:32:44 +00:00
Jakob Stoklund Olesen
492f97910d Prevent infinite growth of the DenseMap.
When the hash function uses object pointers all free entries eventually
become tombstones as they are used at least once, regardless of the size.

DenseMap cannot function with zero empty keys, so it double size to get
get ridof the tombstones.

However DenseMap never shrinks automatically unless it is cleared, so
the net result is that certain tables grow infinitely.

The solution is to make a fresh copy of the table without tombstones
instead of doubling size, by simply calling grow with the current size.

Patch by José Fonseca!

llvm-svn: 128564
2011-03-30 18:32:41 +00:00
Benjamin Kramer
7888d0935d Add APFloat::getExactInverse.
The idea is, that if an ieee 754 float is divided by a power of two, we can
turn the division into a cheaper multiplication. This function sees if we can
get an exact multiplicative inverse for a divisor and returns it if possible.

This is the hard part of PR9587.

I tested many inputs against llvm-gcc's frotend implementation of this
optimization and didn't find any difference. However, floating point is the
land of weird edge cases, so any review would be appreciated.

llvm-svn: 128545
2011-03-30 15:42:27 +00:00
Jay Foad
770a07e1a3 Fix more zero length memset warnings.
llvm-svn: 128543
2011-03-30 15:31:02 +00:00
Jay Foad
bab2718661 Add a comment on PHINode::Create().
llvm-svn: 128540
2011-03-30 13:29:06 +00:00
Jay Foad
53632b7c03 Remove PHINode::reserveOperandSpace(). Instead, add a parameter to
PHINode::Create() giving the (known or expected) number of operands.

llvm-svn: 128537
2011-03-30 11:28:46 +00:00
Bob Wilson
41d1bf3f9f Revert a minor comment change inadvertently included with r128502.
llvm-svn: 128526
2011-03-30 05:26:51 +00:00
Evan Cheng
ed09135349 Add intrinsics @llvm.arm.neon.vmulls and @llvm.arm.neon.vmullu.* back. Frontends
was lowering them to sext / uxt + mul instructions. Unfortunately the
optimization passes may hoist the extensions out of the loop and separate them.
When that happens, the long multiplication instructions can be broken into
several scalar instructions, causing significant performance issue.

Note the vmla and vmls intrinsics are not added back. Frontend will codegen them
as intrinsics vmull* + add / sub. Also note the isel optimizations for catching
mul + sext / zext are not changed either.

First part of rdar://8832507, rdar://9203134

llvm-svn: 128502
2011-03-29 23:06:19 +00:00
Jim Grosbach
30c2338560 Instantiate a JITMemoryManager for MCJIT Dyld
llvm-svn: 128485
2011-03-29 21:03:05 +00:00
Daniel Dunbar
26ea306fac C-API: Include DataTypes.h instead of stdint.h.
llvm-svn: 128446
2011-03-29 02:30:34 +00:00
Daniel Dunbar
cec6959c23 Integrated-As: Add support for setting the AllowTemporaryLabels flag via
integrated-as.

llvm-svn: 128431
2011-03-28 22:49:19 +00:00
Daniel Dunbar
5d8c7d0d36 MC: Add support for disabling "temporary label" behavior. Useful for debugging
on Darwin.

llvm-svn: 128430
2011-03-28 22:49:15 +00:00
Kevin Enderby
8c488cb152 Again adding a C API to the disassembler for use by such tools as Darwin's
otool(1), this time with the needed fix for case sensitive file systems :) .
This is a work in progress as the interface for producing symbolic operands is
not done.  But a hacked prototype using information from the object file's
relocation entiries and replacing immediate operands with MCExpr's has been
shown to work with no changes to the instrucion printer.  These APIs will be
moved into a dynamic library at some point.

llvm-svn: 128415
2011-03-28 18:25:07 +00:00
Frits van Bommel
c234349939 Constant folding support for calls to umul.with.overflow(), basically identical to the smul.with.overflow() code.
llvm-svn: 128379
2011-03-27 14:26:13 +00:00
Jakob Stoklund Olesen
446412de55 Collect and coalesce DBG_VALUE instructions before emitting the function.
Correctly terminate the range of register DBG_VALUEs when the register is
clobbered or when the basic block ends.

The code is now ready to deal with variables that are sometimes in a register
and sometimes on the stack. We just need to teach emitDebugLoc to say 'stack
slot'.

llvm-svn: 128327
2011-03-26 02:19:36 +00:00
Kevin Enderby
b05e6939a0 Remove the files for r128308 as it is causing a buildbot failure.
llvm-svn: 128309
2011-03-26 00:23:05 +00:00
Kevin Enderby
872ebb4fff Adding a C API to the disassembler for use by such tools as Darwin's otool(1).
This is a work in progress as the interface for producing symbolic operands is
not done.  But a hacked prototype using information from the object file's
relocation entiries and replacing immediate operands with MCExpr's has been
shown to work with no changes to the instrucion printer.  These APIs will be
moved into a dynamic library at some point.

llvm-svn: 128308
2011-03-26 00:06:33 +00:00
Jim Grosbach
213800d44b Clean up assembly statement separator support.
The MC asm lexer wasn't honoring a non-default (anything but ';') statement
separator. Fix that, and generalize a bit to support multi-character
statement separators.

llvm-svn: 128227
2011-03-24 18:46:34 +00:00
Jay Foad
008631e572 Fix typo in comment.
llvm-svn: 128216
2011-03-24 16:18:19 +00:00
Evan Cheng
9d660cc8b7 Add comment to clarify what MachineConstantPoolEntry::isMachineConstantPoolEntry() means.
llvm-svn: 128204
2011-03-24 06:28:45 +00:00
Jim Grosbach
06d4707c37 Fix comments.
llvm-svn: 128182
2011-03-23 23:32:48 +00:00
Rafael Espindola
1592f3ae24 Add a lto_codegen_compile_to_file to avoid producing a file, reading it to
memory and writing it back to disk.

llvm-svn: 128108
2011-03-22 20:57:13 +00:00
Rafael Espindola
9e0fcfc02b We don't need a null terminator for the output file.
llvm-svn: 128098
2011-03-22 19:20:47 +00:00
Jim Grosbach
e941bce506 Propogate the error message, not just the error state.
llvm-svn: 128094
2011-03-22 18:19:42 +00:00
Ted Kremenek
d582517a58 Properly initialize all fields in CrashReporterCleanupContext. This caused the buildbot failure earlier.
llvm-svn: 128071
2011-03-22 04:33:13 +00:00
Ted Kremenek
371ad9a265 Rework CrashRecoveryContextCleanup to provide a simpler way to create cleanup objects, and provide a new cleanup for
decrementing reference counts of objects with intrusive reference counts.

llvm-svn: 128055
2011-03-22 01:15:10 +00:00
Ted Kremenek
a686187713 Relax access control on 'Release' method of RefCountedBase.
llvm-svn: 128054
2011-03-22 01:15:07 +00:00
Jim Grosbach
9ad8d572e9 Library-ize the dyld components of llvm-rtdyld.
Move the dynamic linking functionality of the llvm-rtdyld program into an
ExecutionEngine support library. Update llvm-rtdyld to just load an object
file into memory, use the library to process it, then run the _main()
function, if one is found.

llvm-svn: 128031
2011-03-21 22:15:52 +00:00
Ted Kremenek
a462a53e0b Provide a means for CrashRecovery clients to determine if code is currently running while crash recovery cleanups are being processed.
llvm-svn: 128008
2011-03-21 18:38:03 +00:00
Ted Kremenek
58a4560569 Allow a client to clear an IntrustiveRefCntPtr (deliberately leaking the referenced object).
llvm-svn: 128007
2011-03-21 18:37:59 +00:00
Eric Christopher
ed687f1e8b Fix unused param warning.
llvm-svn: 128005
2011-03-21 18:06:32 +00:00
Jay Foad
3d4a8cab78 Fix typos in assert messages.
llvm-svn: 128002
2011-03-21 16:38:22 +00:00
Bill Wendling
a2eec46242 We need to pass the TargetMachine object to the InstPrinter if we are printing
the alias of an InstAlias instead of the thing being aliased. Because we need to
know the features that are valid for an InstAlias.

This is part of a work-in-progress.

llvm-svn: 127986
2011-03-21 04:13:46 +00:00
Evan Cheng
dd99a0a548 Re-apply r127953 with fixes: eliminate empty return block if it has no predecessors; update dominator tree if cfg is modified.
llvm-svn: 127981
2011-03-21 01:19:09 +00:00
Argyrios Kyrtzidis
f906dcc618 If a class inherits from RefCountedBaseVPTR allow all its subclasses to be used with IntrusiveRefCntPtr.
llvm-svn: 127966
2011-03-20 06:14:56 +00:00
Daniel Dunbar
34c65737c3 Revert r127953, "SimplifyCFG has stopped duplicating returns into predecessors
to canonicalize IR", it broke a lot of things.

llvm-svn: 127954
2011-03-19 21:47:14 +00:00
Evan Cheng
c5f50f7322 SimplifyCFG has stopped duplicating returns into predecessors to canonicalize IR
to have single return block (at least getting there) for optimizations. This
is general goodness but it would prevent some tailcall optimizations.
One specific case is code like this:
int f1(void);
int f2(void);
int f3(void);
int f4(void);
int f5(void);
int f6(void);
int foo(int x) {
  switch(x) {
  case 1: return f1();
  case 2: return f2();
  case 3: return f3();
  case 4: return f4();
  case 5: return f5();
  case 6: return f6();
  }
}

=>
LBB0_2:                                 ## %sw.bb
  callq   _f1
  popq    %rbp
  ret
LBB0_3:                                 ## %sw.bb1
  callq   _f2
  popq    %rbp
  ret
LBB0_4:                                 ## %sw.bb3
  callq   _f3
  popq    %rbp
  ret

This patch teaches codegenprep to duplicate returns when the return value
is a phi and where the phi operands are produced by tail calls followed by
an unconditional branch:

sw.bb7:                                           ; preds = %entry
  %call8 = tail call i32 @f5() nounwind
  br label %return
sw.bb9:                                           ; preds = %entry
  %call10 = tail call i32 @f6() nounwind
  br label %return
return:
  %retval.0 = phi i32 [ %call10, %sw.bb9 ], [ %call8, %sw.bb7 ], ... [ 0, %entry ]
  ret i32 %retval.0

This allows codegen to generate better code like this:

LBB0_2:                                 ## %sw.bb
        jmp     _f1                     ## TAILCALL
LBB0_3:                                 ## %sw.bb1
        jmp     _f2                     ## TAILCALL
LBB0_4:                                 ## %sw.bb3
        jmp     _f3                     ## TAILCALL

rdar://9147433

llvm-svn: 127953
2011-03-19 17:17:39 +00:00
Stuart Hastings
0c1298989f Reapply 127939 since Daniel fixed the breakage. <rdar://problem/9012638>
llvm-svn: 127944
2011-03-19 02:42:31 +00:00
Stuart Hastings
0b337d0fe8 Revert 127939. <rdar://problem/9012638>
llvm-svn: 127943
2011-03-19 02:33:56 +00:00
Stuart Hastings
4a2b1ca9c1 Revise r126127 to address Daniel's comments. <rdar://problem/9012638>
llvm-svn: 127939
2011-03-19 01:32:01 +00:00
Ted Kremenek
c4fa37479a Tweak CrashRecoveryContextCleanup to provide an easy method for clients to select between 'delete' and 'destructor' cleanups, and allow the destructor of CrashRecoveryContextCleanupRegister to be pseudo re-entrant.
llvm-svn: 127929
2011-03-19 00:59:37 +00:00
Devang Patel
c8b77563dc If an AllocaInst referred by DbgDeclareInst is used by a LoadInst then the LoadInst should also get a corresponding llvm.dbg.value intrinsic.
llvm-svn: 127924
2011-03-18 23:45:43 +00:00
Jim Grosbach
75deb766b9 Beginnings of MC-JIT code generation.
Proof-of-concept code that code-gens a module to an in-memory MachO object.
This will be hooked up to a run-time dynamic linker library (see: llvm-rtdyld
for similarly conceptual work for that part) which will take the compiled
object and link it together with the rest of the system, providing back to the
JIT a table of available symbols which will be used to respond to the
getPointerTo*() queries.

llvm-svn: 127916
2011-03-18 22:48:41 +00:00
Andrew Trick
dd6faad20a Avoid creating canonical induction variables for non-native types.
For example, on 32-bit architecture, don't promote all uses of the IV
to 64-bits just because one use is a 64-bit cast.
Alternate implementation of the patch by Arnaud de Grandmaison.

llvm-svn: 127884
2011-03-18 16:50:32 +00:00
Jim Grosbach
e6c2e66311 Tidy up.
llvm-svn: 127883
2011-03-18 16:39:36 +00:00
Ted Kremenek
c7c75361fa Tweak CrashRecoveryContextCleanup::createCleanup() to use the 'delete' cleanup as opposed to the 'destructor' cleanup (reclaims more memory).
llvm-svn: 127865
2011-03-18 03:46:21 +00:00
Ted Kremenek
4a4428a5bc Add new CrashRecoveryContextCleanup subclass: CrashRecoveryContextDeleteCleanup. This deletes the object, not just calls its destructor.
llvm-svn: 127855
2011-03-18 03:04:18 +00:00
Ted Kremenek
1a2fa05e5f Augment CrashRecoveryContext to have registered "cleanup" objects that can be used to release resources during a crash.
llvm-svn: 127849
2011-03-18 02:05:11 +00:00
Andrew Trick
07887af00c Added isValidRewrite() to check the result of ScalarEvolutionExpander.
SCEV may generate expressions composed of multiple pointers, which can
lead to invalid GEP expansion. Until we can teach SCEV to follow strict
pointer rules, make sure no bad GEPs creep into IR.
Fixes rdar://problem/9038671.

llvm-svn: 127839
2011-03-17 23:51:11 +00:00
Rafael Espindola
3ecf930d14 Use RequiresNullTerminator to create buffers without a null terminator
instead of copying.

llvm-svn: 127835
2011-03-17 22:18:42 +00:00
Devang Patel
f8c3eb7368 Try to not lose variable's debug info during instcombine.
This is done by lowering dbg.declare intrinsic into dbg.value intrinsic.
Radar 9143931.

llvm-svn: 127834
2011-03-17 22:18:16 +00:00
Devang Patel
3506f02e33 Refactor into a separate utility function.
llvm-svn: 127832
2011-03-17 21:58:19 +00:00
Benjamin Kramer
a85996c235 Add an argument to APInt's magic udiv calculation to specify the number of bits that are known zero in the divided number.
This will come in handy soon.

llvm-svn: 127828
2011-03-17 20:39:06 +00:00
Jakob Stoklund Olesen
047a25b0b0 Dead code elimination may separate the live interval into multiple connected components.
I have convinced myself that it can only happen when a phi value dies. When it
happens, allocate new virtual registers for the components.

llvm-svn: 127827
2011-03-17 20:37:07 +00:00
Richard Osborne
6bad79b514 Add XCore intrinsic for setpsc.
llvm-svn: 127821
2011-03-17 18:42:05 +00:00
Cameron Zwarich
cea63dc052 Move more logic into getTypeForExtArgOrReturn.
llvm-svn: 127809
2011-03-17 14:53:37 +00:00
Cameron Zwarich
a5746339cc Rename getTypeForExtendedInteger() to getTypeForExtArgOrReturn().
llvm-svn: 127807
2011-03-17 14:21:56 +00:00
Rafael Espindola
8dab9a762b Add support in the LTO library for loading an object from the middle
of an file.

llvm-svn: 127781
2011-03-17 00:36:11 +00:00
Jakob Stoklund Olesen
2786187b43 Rewrite instructions as part of ConnectedVNInfoEqClasses::Distribute.
llvm-svn: 127779
2011-03-17 00:23:45 +00:00
Cameron Zwarich
2bb1e45ea3 The x86-64 ABI says that a bool is only guaranteed to be sign-extended to a byte
rather than an int. Thankfully, this only causes LLVM to miss optimizations, not
generate incorrect code.

This just fixes the zext at the return. We still insert an i32 ZextAssert when
reading a function's arguments, but it is followed by a truncate and another i8
ZextAssert so it is not optimized.

llvm-svn: 127766
2011-03-16 22:20:18 +00:00
Richard Osborne
8b90369d96 Add XCore intrinsics for setclk, setrdy.
llvm-svn: 127761
2011-03-16 21:56:00 +00:00
Richard Osborne
318e25c620 Add checkevent intrinsic to check if any resources owned by the current thread
can event.

llvm-svn: 127741
2011-03-16 18:34:00 +00:00
Cameron Zwarich
96e380e650 Add TargetData::fitsInLegalInteger().
llvm-svn: 127714
2011-03-16 00:13:28 +00:00
John Thompson
da294e31da Add scei vendor
llvm-svn: 127705
2011-03-15 21:51:56 +00:00
Richard Osborne
70204c1c29 Add XCore intrinsics for getps, setps, setsr and clrsr.
llvm-svn: 127678
2011-03-15 13:45:47 +00:00
Justin Holewinski
8948485aa7 PTX: Set PTX 2.0 as the minimum supported version
- Remove PTX 1.4 code generation
- Change type of intrinsics to .v4.i32 instead of .v4.i16
- Add and/or/xor integer instructions

llvm-svn: 127677
2011-03-15 13:24:15 +00:00
Evan Cheng
14eff5d627 - Add "Bitcast" target instruction property for instructions which perform
nothing more than a bitcast.
- Teach tablegen to automatically infer "Bitcast" property.

llvm-svn: 127667
2011-03-15 05:09:26 +00:00
John McCall
cb1d6e9690 Version N of the llvm_unreachable patch: VC++ doesn't recognize that abort()
doesn't return, so just go back to using the old runtime function instead
of trying to use abort() when __builtin_unreachable (or an equivalent) isn't
supported.

llvm-svn: 127629
2011-03-14 22:41:50 +00:00
Jim Grosbach
560a7bf8b1 Trailing whitespace.
llvm-svn: 127620
2011-03-14 20:59:06 +00:00
Jakob Stoklund Olesen
29a9539e7f Place context in member variables instead of passing around pointers.
Use the opportunity to get rid of the trailing underscore variable names.

llvm-svn: 127618
2011-03-14 20:57:14 +00:00
John McCall
952cbb2634 Okay, some compilers complain if you provide the exception-specification
where none was before.  Just don't declare it and hope it's declared
in every translation unit that needs it.

llvm-svn: 127612
2011-03-14 20:20:29 +00:00
John McCall
46f704310d Fix the exception-specification of abort() when declaring it in C++.
llvm-svn: 127610
2011-03-14 20:10:50 +00:00
John McCall
fe51bf5de7 Make llvm_unreachable evaluate to __builtin_unreachable() in -Asserts
builds, which was the apparent consensus of PR8973 and llvmdev.

llvm-svn: 127608
2011-03-14 20:01:21 +00:00
Andrew Trick
5d45b563c5 Added SCEV::NoWrapFlags to manage unsigned, signed, and self wrap
properties.
Added the self-wrap flag for SCEV::AddRecExpr.
A slew of temporary FIXMEs indicate the intention of the no-self-wrap flag
without changing behavior in this revision.

llvm-svn: 127590
2011-03-14 16:50:06 +00:00
Mikhail Glushenkov
5a7b935681 Emacs mode string.
llvm-svn: 127576
2011-03-14 04:20:57 +00:00
Duncan Sands
0514e10276 Speculatively revert commit 127478 (jsjodin) in an attempt to fix the
llvm-gcc-i386-linux-selfhost and llvm-x86_64-linux-checks buildbots.
The original log entry:
Remove optimization emitting a reference insted of label difference, since
it can create more relocations. Removed isBaseAddressKnownZero method,
because it is no longer used.

llvm-svn: 127540
2011-03-12 13:07:37 +00:00
Owen Anderson
78afadfa5d Teach FastISel to support register-immediate-immediate instructions.
llvm-svn: 127496
2011-03-11 21:33:55 +00:00
Jim Grosbach
39476d9010 80 columns.
llvm-svn: 127495
2011-03-11 21:02:27 +00:00
Jim Grosbach
4ed235527d Trailing whitespace.
llvm-svn: 127493
2011-03-11 20:59:19 +00:00
Jan Sjödin
b58b9618ce Remove optimization emitting a reference insted of label difference, since it can create more relocations. Removed isBaseAddressKnownZero method, because it is no longer used.
llvm-svn: 127478
2011-03-11 19:37:02 +00:00
Rafael Espindola
a271db1a12 Add r127409 back now that the windows file was updated.
llvm-svn: 127417
2011-03-10 18:33:29 +00:00
Jakob Stoklund Olesen
891bfab351 Revert r127409 which broke all the Windows bots.
llvm-svn: 127413
2011-03-10 18:01:43 +00:00
Rafael Espindola
b7a2d86ef5 Add support for MemoryBuffers that are not null terminated and add
support for creating buffers that cover only a part of a file.

llvm-svn: 127409
2011-03-10 16:10:30 +00:00
Che-Liang Chiou
fc6c7ba9d5 ptx: add the rest of special registers of ISA version 2.0
llvm-svn: 127397
2011-03-10 04:05:57 +00:00
Jakob Stoklund Olesen
70541686bf Make SpillIs an optional pointer. Avoid creating a bunch of temporary SmallVectors.
llvm-svn: 127388
2011-03-10 01:21:58 +00:00
Devang Patel
73d68195ce Introduce DebugInfoProbe. This is used to monitor how llvm optimizer is treating debugging information.
It generates output that lools like

8 times line number info lost by Scalar Replacement of Aggregates (SSAUp) 
1 times line number info lost by Simplify well-known library calls 
12 times variable info lost by Jump Threading

llvm-svn: 127381
2011-03-10 00:21:25 +00:00
Evan Cheng
a3a7a7e364 Re-commit 127368 and 127371. They are exonerated.
llvm-svn: 127380
2011-03-10 00:16:32 +00:00
Evan Cheng
d7a2008a55 Revert 127368 and 127371 for now.
llvm-svn: 127376
2011-03-09 23:53:17 +00:00
Evan Cheng
c4a9f8a319 Restore the default implementation of getCrossCopyRegClass: no need for cross-regclass copies.
llvm-svn: 127371
2011-03-09 23:15:40 +00:00
Evan Cheng
b717770dfe Change the definition of TargetRegisterInfo::getCrossCopyRegClass to be more
flexible.

If it returns a register class that's different from the input, then that's the
register class used for cross-register class copies.
If it returns a register class that's the same as the input, then no cross-
register class copies are needed (normal copies would do).
If it returns null, then it's not at all possible to copy registers of the
specified register class.

llvm-svn: 127368
2011-03-09 22:47:38 +00:00
Jan Sjödin
c7c66d9f88 Add createELFObjectTargetWriter method to TargetAsmBackend, which enables construction of non-standard ELFObjectWriters that can be used in MCJIT.
llvm-svn: 127346
2011-03-09 18:44:41 +00:00
Jan Sjödin
6791bc64a2 Add constructors to MCElfStreamer and MCObjectStreamer to take an extra MCAssembler * argument.
llvm-svn: 127343
2011-03-09 17:33:05 +00:00
Jan Sjödin
7962eba596 Add InitializeNativeAsmParser function.
llvm-svn: 127341
2011-03-09 17:25:46 +00:00
John McCall
7ae7882159 Typo. Patch by arrowdodger.
llvm-svn: 127256
2011-03-08 18:01:22 +00:00
Chris Lattner
ea7b7189f5 fix incorrect comment.
llvm-svn: 127252
2011-03-08 16:59:03 +00:00
Justin Holewinski
d7426856e9 PTX: Add intrinsic support for ntid, ctaid, and nctaid registers
llvm-svn: 127246
2011-03-08 14:10:18 +00:00
Jakob Stoklund Olesen
f9401745e0 Let shrinkToUses optionally return a list of now dead machine instructions.
llvm-svn: 127192
2011-03-07 23:29:10 +00:00
Eric Christopher
e3080a1de4 Typos.
llvm-svn: 127186
2011-03-07 22:48:16 +00:00
Cameron Zwarich
a1920d7f51 Move getRegPressureLimit() from TargetLoweringInfo to TargetRegisterInfo.
llvm-svn: 127175
2011-03-07 21:56:36 +00:00
Duncan Sands
323db6bb99 Often GCC can see that NumBuckets is zero here, resulting in a warning
about possibly swapped memset parameters.  Avoid the warning.

llvm-svn: 127170
2011-03-07 19:38:38 +00:00
Jim Grosbach
cbd2f07c7e Tidy up.
llvm-svn: 127169
2011-03-07 19:28:43 +00:00
Owen Anderson
11a49e845a Use the correct LHS type when determining the legalization of a shift's RHS type.
llvm-svn: 127163
2011-03-07 18:29:47 +00:00
Argyrios Kyrtzidis
5a57c82f11 Try fixing mingw build.
llvm-svn: 127153
2011-03-07 05:35:01 +00:00
Argyrios Kyrtzidis
9cd53db2f9 Do a compiler check that we use one of the types from PointerUnion[N], instead of a runtime check.
llvm-svn: 127145
2011-03-07 01:30:20 +00:00
Nick Lewycky
46bb763f35 ConstantInt has some getters which return ConstantInt's or ConstantVector's of
the value splatted into every element. Extend this to getTrue and getFalse which
by providing new overloads that take Types that are either i1 or <N x i1>. Use
it in InstCombine to add vector support to some code, fixing PR8469!

llvm-svn: 127116
2011-03-06 03:36:19 +00:00
Benjamin Kramer
fbb4be942c Avoid zero-sized allocations when copying a fresh DenseMap.
llvm-svn: 127110
2011-03-05 22:00:28 +00:00
Anton Korobeynikov
917ca94111 Preliminary support for ARM frame save directives emission via MI flags.
This is just very first approximation how the stuff should be done
(e.g. ARM-only for now). More to follow.

llvm-svn: 127101
2011-03-05 18:43:32 +00:00
Anton Korobeynikov
d7910e3cb6 Provide hooks to set MI flags in MachineInstrBuilder
llvm-svn: 127100
2011-03-05 18:43:20 +00:00
Anton Korobeynikov
62e48532b9 Some first rudimentary support for ARM EHABI: print exception table in "text mode".
llvm-svn: 127099
2011-03-05 18:43:15 +00:00
Anton Korobeynikov
c746be3dc4 Add FrameSetup MI flags
llvm-svn: 127098
2011-03-05 18:43:04 +00:00
Anton Korobeynikov
eb2742ccf2 Shorten AsmPrinterFlags filed to accomodate for future Flags field
llvm-svn: 127097
2011-03-05 18:42:54 +00:00
Benjamin Kramer
4861bbca65 Lazily allocate DenseMaps.
This makes lookup slightly more expensive but it's worth it, unused
DenseMaps are common in LLVM code apparently.

1% speedup on clang -O3 bzip2.c
4% speedup on clang -O3 oggenc.c (Release build of clang on i386/linux)

llvm-svn: 127088
2011-03-05 16:43:41 +00:00
Che-Liang Chiou
15aba09539 ptx: add basic intrinsic support
llvm-svn: 127084
2011-03-05 14:17:37 +00:00
Andrew Trick
e310d30fba Missing "virtual" keyword. Jakob's review.
llvm-svn: 127070
2011-03-05 08:39:45 +00:00
Andrew Trick
7db197d209 Increased the register pressure limit on x86_64 from 8 to 12
regs. This is the only change in this checkin that may affects the
default scheduler. With better register tracking and heuristics, it
doesn't make sense to artificially lower the register limit so much.

Added -sched-high-latency-cycles and X86InstrInfo::isHighLatencyDef to
give the scheduler a way to account for div and sqrt on targets that
don't have an itinerary. It is currently defaults to 10 (the actual
number doesn't matter much), but only takes effect on non-default
schedulers: list-hybrid and list-ilp.

Added several heuristics that can be individually disabled for the
non-default sched=list-ilp mode. This helps us determine how much
better we can do on a given benchmark than the default
scheduler. Certain compute intensive loops run much faster in this
mode with the right set of heuristics, and it doesn't seem to have
much negative impact elsewhere. Not all of the heuristics are needed,
but we still need to experiment to decide which should be disabled by
default for sched=list-ilp.

llvm-svn: 127067
2011-03-05 08:00:22 +00:00
Jin-Gu Kang
0c32c038c9 test commit
llvm-svn: 127059
2011-03-05 02:36:09 +00:00
Jim Grosbach
372394916e Teach the register scavenger to take subregs into account when finding a free register.
llvm-svn: 127049
2011-03-05 00:20:19 +00:00
Eric Christopher
d779c4197b Support unregistering exception frames of functions when they are removed.
Patch by Johannes Schaub!

Fixes PR8548

llvm-svn: 127047
2011-03-04 23:37:39 +00:00
Jakob Stoklund Olesen
8b66caf12a Renumber slot indexes locally when possible.
Initially, slot indexes are quad-spaced. There is room for inserting up to 3
new instructions between the original instructions.

When we run out of indexes between two instructions, renumber locally using
double-spaced indexes. The original quad-spacing means that we catch up quickly,
and we only have to renumber a handful of instructions to get a monotonic
sequence. This is much faster than renumbering the whole function as we did
before.

llvm-svn: 127023
2011-03-04 19:43:38 +00:00
Jakob Stoklund Olesen
61af2752b1 Symbolize the default instruction distance.
llvm-svn: 127013
2011-03-04 18:36:51 +00:00
Jakob Stoklund Olesen
728fffc159 Deferred SlotIndex renumbering was a good idea but never used.
llvm-svn: 127008
2011-03-04 18:08:32 +00:00
Devang Patel
9dbcb14cd8 Add ArrayRef variant.
llvm-svn: 126978
2011-03-04 01:20:33 +00:00
Jakob Stoklund Olesen
5bc7a96cca Use an IndexedMap instead of a DenseMap for the live-out cache.
This speeds up updateSSA() so it only accounts for 5% of the live range
splitting time.

llvm-svn: 126972
2011-03-04 00:15:36 +00:00
Bill Wendling
6e6a0422eb There are times when the landing pad won't have a call to 'eh.selector' in
it. It's been assumed up til now that it would be in its immediate
successor. However, this isn't necessarily the case. It could be in one of its
successor's successors.

Modify the code to more thoroughly check for an 'eh.selector' call in
successors. It only looks at a successor if we get there as a result of an
unconditional branch.

Testcase ObjC/exceptions-4.m in r126968.

llvm-svn: 126969
2011-03-03 23:14:05 +00:00
Jim Grosbach
e4ef37b298 Allow a target to choose whether to prefer the scavenger emergency spill slot
be next to the frame pointer or the stack pointer.

llvm-svn: 126956
2011-03-03 20:01:52 +00:00
Richard Osborne
88d0d840f2 Optimize fprintf -> iprintf if there are no floating point arguments
and siprintf is available on the target.

llvm-svn: 126940
2011-03-03 14:20:22 +00:00
Richard Osborne
021b589253 Optimize sprintf -> siprintf if there are no floating point arguments
and siprintf is available on the target.

llvm-svn: 126937
2011-03-03 14:09:28 +00:00
Richard Osborne
df829ddcb7 Optimize printf -> iprintf if there are no floating point arguments
and iprintf is available on the target. Currently iprintf is only
marked as being available on the XCore.

llvm-svn: 126935
2011-03-03 13:17:51 +00:00
Tilmann Scheller
ab6450ec63 Use X86_thiscall calling convention for Win64 as well.
llvm-svn: 126934
2011-03-03 07:49:07 +00:00
Jakob Stoklund Olesen
d0930e03c1 Represent sentinel slot indexes with a null pointer.
This is much faster than using a pointer to a ManagedStatic object accessed with
a function call. The greedy register allocator is 5% faster overall just from
the SlotIndex default constructor savings.

llvm-svn: 126925
2011-03-03 05:40:04 +00:00
Jakob Stoklund Olesen
2e6407e9aa Avoid comparing invalid slot indexes, and assert that it doesn't happen.
The SlotIndex created by the default construction does not represent a position
in the function, and it doesn't make sense to compare it to other indexes.

llvm-svn: 126924
2011-03-03 05:18:19 +00:00
Jakob Stoklund Olesen
2a12e5adba Optimize SlotIndex equality tests.
IndexListEntries have unique indexes, so it is not necessary to dereference
pointers to them.

llvm-svn: 126923
2011-03-03 05:18:15 +00:00
Chris Lattner
e82c10f5df add some slice helper methods.
llvm-svn: 126878
2011-03-02 20:55:51 +00:00
Duncan Sands
a7c3ebafe4 Remove DIFactory. Patch by Devang.
llvm-svn: 126871
2011-03-02 20:30:37 +00:00
Tilmann Scheller
c557d1eeb4 Add Win64 thiscall calling convention.
llvm-svn: 126862
2011-03-02 19:29:22 +00:00
Rafael Espindola
7f301833ee Add a special streamer to libLTO that just records symbols definitions and
uses.

The result produced by the streamer is used to give the linker more accurate
information and to add to llvm.compiler.used. The second improvement removes
the need for the user to add __attribute__((used)) to functions only used in
inline asm. The first one lets us build firefox with LTO on Darwin :-)

llvm-svn: 126830
2011-03-02 04:14:42 +00:00
Dan Gohman
b62daa9ec3 Make pred_iterator DefaultConstructible, and add an accessor to
retrieve the underlying getOperandNo() value.

llvm-svn: 126804
2011-03-02 00:11:28 +00:00