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6451 Commits

Author SHA1 Message Date
Dan Gohman
138a53b303 Change class' public PassInfo variables to by initialized with the 
address of the PassInfo directly instead of calling getPassInfo.
This eliminates a bunch of dynamic initializations of static data.

Also, fold RegisterPassBase into PassInfo, make a bunch of its
data members const, and rearrange some code to initialize data
members in constructors instead of using setter member functions.

llvm-svn: 51022
 2008-05-13 02:05:11 +00:00
Evan Cheng
fcbdc8bd6e Xform bitconvert(build_pair(load a, load b)) to a single load if the load locations are at the right offset from each other. 
llvm-svn: 51008
 2008-05-12 23:04:07 +00:00
Bill Wendling
646f3458c4 Constify the machine instruction passed into the 
"is{Trivially,Really}ReMaterializable" methods.

llvm-svn: 51001
 2008-05-12 20:54:26 +00:00
Evan Cheng
228cce5b2d Forgot this. 
llvm-svn: 50993
 2008-05-12 20:08:05 +00:00
Nate Begeman
11c0772a30 Add support for vicmp/vfcmp codegen, more legalize support coming. 
This is necessary to unbreak the build.

llvm-svn: 50988
 2008-05-12 19:40:03 +00:00
Nate Begeman
b5b1e1353b Add two new instructions to the llvm IR, vicmp and vfcmp. see updated LangRef 
for details.  CodeGen support coming in a follow up patch

llvm-svn: 50985
 2008-05-12 19:01:56 +00:00
Chris Lattner
f459fcde61 Add a new SparsePropagation analysis utility, which allows you to do 
SCCP like sparse lattice analysis with relative ease.  Just pick your
lattice function and implement the transfer function and you're good.
Just make sure you don't break monotonicity ;-)

llvm-svn: 50961
 2008-05-12 01:12:24 +00:00
Nick Lewycky
6bc321fbdf Make constructors target-specific. This fixes problems where the path would 
include backslashes on Windows. This should fix llvm-ld problems on win32.

llvm-svn: 50960
 2008-05-11 17:37:40 +00:00
Bill Wendling
cc084a6ba1 Remove warnings when using -Wshorten-64-to-32. 
llvm-svn: 50952
 2008-05-10 19:59:59 +00:00
Bill Wendling
cc8838799d Prevent -W64-to-32-shortened warnings. 
llvm-svn: 50947
 2008-05-10 11:26:52 +00:00
Bill Wendling
adfb940f3a Prevent warnings from the -Wshorten-64-to-32 flag. 
llvm-svn: 50946
 2008-05-10 10:58:07 +00:00
Gabor Greif
724556e521 remove commented-out code, it is subsumed by DECLARE_TRANSPARENT_OPERAND_ACCESSORS 
llvm-svn: 50944
 2008-05-10 09:36:58 +00:00
Gabor Greif
49bf1a4cf6 merge of use-diet branch to trunk 
llvm-svn: 50943
 2008-05-10 08:32:32 +00:00
Evan Cheng
f87942325f Make OpActionsCapacity multiple of 4. 
llvm-svn: 50917
 2008-05-09 21:50:23 +00:00
Chris Lattner
69724eed32 add support for pattern matching 'neg' 
llvm-svn: 50883
 2008-05-09 05:20:27 +00:00
Chris Lattner
3c362081d5 add a new Instruction::mayReadFromMemory predicate, make 
Instruction::mayWriteToMemory stronger for invokes.

llvm-svn: 50858
 2008-05-08 17:16:51 +00:00
Anton Korobeynikov
ddb93e7a02 Turn StripPointerCast() into a method 
llvm-svn: 50836
 2008-05-07 22:54:15 +00:00
Ted Kremenek
1534cce257 Make the interface of CStrInCStrNoCase be the same as strcasestr. 
llvm-svn: 50828
 2008-05-07 20:04:18 +00:00
Chris Lattner
3ee18d7c51 Add a new LibCallAliasAnalysis pass, which is parameterized 
by an instance of LibCallInfo to provide mod/ref info of
standard library functions.  This is powerful enough to
say that 'sqrt' is readonly except that it modifies errno,
or that "printf doesn't store to memory unless the %n
constraint is present" etc.

llvm-svn: 50827
 2008-05-07 19:53:05 +00:00
Ted Kremenek
b82fe559d6 Fix some serious logical errors in CStrInCStrNoCase pointed out by Bill. 
llvm-svn: 50826
 2008-05-07 19:22:36 +00:00
Duncan Sands
6f4e916c6a Output correct exception handling and frame info 
on x86-64 linux.  This causes no regressions on
32 bit linux and 32 bit ppc.  More tests pass
on 64 bit ppc with no regressions.  I didn't
turn on eh on 64 bit linux because the intrinsics
needed to compile the eh runtime aren't done
yet.  But if you turn it on and link with the
mainline runtime then eh seems to work fine
on x86-64 linux with this patch.  Thanks to
Dale for testing.  The main point of the patch
is that if you output that some object is
encoded using 4 bytes you had better not output
8 bytes for it: the patch makes everything
consistent.

llvm-svn: 50825
 2008-05-07 19:11:09 +00:00
Ted Kremenek
cbaf12a084 Guard for empty strings in CStrInCStrNoCase. 
llvm-svn: 50823
 2008-05-07 18:49:31 +00:00
Ted Kremenek
535ed35152 Added CStrInCStrNoCase, a portable implementation of strcasestr. 
llvm-svn: 50821
 2008-05-07 18:35:46 +00:00
Chris Lattner
e70ff7b21c Add a new interface for describing the behavior of library calls. This 
Currently is sufficient to describe mod/ref behavior but will hopefully
eventually be extended for other purposes.

This isn't used by anything yet.

llvm-svn: 50820
 2008-05-07 18:21:13 +00:00
Nick Lewycky
adfc627b77 Typo. 
llvm-svn: 50805
 2008-05-07 06:39:04 +00:00
Bill Wendling
a7619e13ed Make the use of the "noinline" attribute conditional on using GCC. 
llvm-svn: 50789
 2008-05-07 00:00:34 +00:00
Bill Wendling
9d987912d6 Workaround for a compiler bug (see <rdar://problem/5852746>). Once that bug is 
fixed, revert this patch.

llvm-svn: 50782
 2008-05-06 23:30:02 +00:00
Anton Korobeynikov
90ee6d6616 Make StripPointerCast a common function (should we mak it method of Value instead?) 
llvm-svn: 50775
 2008-05-06 22:52:30 +00:00
Dan Gohman
a84b75df17 Remove uses of llvm/System/IncludeFile.h that are no longer needed. 
llvm-svn: 50695
 2008-05-06 01:32:53 +00:00
Dan Gohman
f7f3f7ab8f Fix a broken doxygen comment, and reword it for clarity. 
llvm-svn: 50687
 2008-05-06 00:20:10 +00:00
Bill Wendling
9facb00af6 Using "unsigned" was masking the "size_t" version of this method. 
llvm-svn: 50668
 2008-05-05 20:51:58 +00:00
Devang Patel
0206af99dc Remove unused function. 
llvm-svn: 50664
 2008-05-05 19:44:16 +00:00
Mon P Wang
84a269e023 Added addition atomic instrinsics and, or, xor, min, and max. 
llvm-svn: 50663
 2008-05-05 19:05:59 +00:00
Evan Cheng
d9353009b7 Fix more -Wshorten-64-to-32 warnings. 
llvm-svn: 50659
 2008-05-05 18:30:58 +00:00
Evan Cheng
281654e4fb Fix 80 column violations. 
llvm-svn: 50655
 2008-05-05 17:41:03 +00:00
Dan Gohman
c860d9c77c Add AsmPrinter support for emitting a directive to declare that 
the code being generated does not require an executable stack.

Also, add target-specific code to make use of this on Linux
on x86. 

llvm-svn: 50634
 2008-05-05 00:28:39 +00:00
Owen Anderson
611b415d12 Fix PR1098 by correcting the postdominators analysis. 
Patch by Florian Brandner.

llvm-svn: 50628
 2008-05-04 21:07:35 +00:00
Chris Lattner
9b05ba1b41 remove obsolete method. 
llvm-svn: 50622
 2008-05-04 18:14:55 +00:00
Torok Edwin
d016bb2685 Implement destructor for PostDominatorTree to eliminate a memory leak. 
llvm-svn: 50607
 2008-05-03 20:25:26 +00:00
Ted Kremenek
aff3b5126a Implement operator-> for ImmutableMap iterators. 
llvm-svn: 50603
 2008-05-03 01:05:46 +00:00
Evan Cheng
c1c2adbfc6 Add separate intrinsics for MMX / SSE shifts with i32 integer operands. This allow us to simplify the horribly complicated matching code. 
llvm-svn: 50601
 2008-05-03 00:52:09 +00:00
Evan Cheng
c2d34f03bf Suppress -Wshorten-64-to-32 warnings for 64-bit hosts. 
llvm-svn: 50590
 2008-05-02 21:15:08 +00:00
Ted Kremenek
9d8f6a05b6 Initialize a local variable. 
llvm-svn: 50527
 2008-05-01 17:08:00 +00:00
Chris Lattner
be2bafbe92 Delete the IPO simplify-libcalls and completely reimplement it as 
a FunctionPass.  This makes it simpler, fixes dozens of bugs, adds
a couple of minor features, and shrinks is considerably: from
2214 to 1437 lines.

llvm-svn: 50520
 2008-05-01 06:25:24 +00:00
Chris Lattner
3835284f4c Add CreateCall3/CreateCall4 at Eric's request. 
llvm-svn: 50515
 2008-05-01 05:23:45 +00:00
Chris Lattner
09cf777a96 Add a spiffy little "CreateCall2" method, which can be used to make 
a function call that takes two Value*'s as arguments.

llvm-svn: 50514
 2008-05-01 05:11:00 +00:00
Arnold Schwaighofer
f58a35e2ec Tail call optimization improvements: 
Move platform independent code (lowering of possibly overwritten
arguments, check for tail call optimization eligibility) from
target X86ISelectionLowering.cpp to TargetLowering.h and
SelectionDAGISel.cpp.

Initial PowerPC tail call implementation:

Support ppc32 implemented and tested (passes my tests and
test-suite llvm-test).  
Support ppc64 implemented and half tested (passes my tests).
On ppc tail call optimization is performed if 
  caller and callee are fastcc
  call is a tail call (in tail call position, call followed by ret)
  no variable argument lists or byval arguments
  option -tailcallopt is enabled
Supported:
 * non pic tail calls on linux/darwin
 * module-local tail calls on linux(PIC/GOT)/darwin(PIC)
 * inter-module tail calls on darwin(PIC)
If constraints are not met a normal call will be emitted.

A test checking the argument lowering behaviour on x86-64 was added.

llvm-svn: 50477
 2008-04-30 09:16:33 +00:00
Chris Lattner
8f27116c1d add missing #include 
llvm-svn: 50468
 2008-04-30 04:56:14 +00:00
Chris Lattner
710d05695f add a method for comparing to see if a value has a specified name. 
llvm-svn: 50465
 2008-04-30 03:55:40 +00:00
Owen Anderson
5b7928f3d2 Rename DeadLoopElimination to LoopDeletion, part 2. 
llvm-svn: 50437
 2008-04-29 20:06:54 +00:00
Roman Levenstein
35f24acb46 Use std::set instead of std::priority_queue for the RegReductionPriorityQueue. 
This removes the existing bottleneck related to the removal of elements from 
the middle of the queue.

Also fixes a subtle bug in ScheduleDAGRRList::CapturePred:
It was updating the state of the SUnit before removing it. As a result, the
comparison operators were working incorrectly and this SUnit could not be removed 
from the queue properly.

Reviewed by Evan and Dan. Approved by Dan.

llvm-svn: 50412
 2008-04-29 09:07:59 +00:00
Owen Anderson
4cc52fd657 Add dead loop elimination, which removes dead loops for which we can compute 
the trip count.

llvm-svn: 50382
 2008-04-29 00:38:34 +00:00
Dale Johannesen
08671c6cac Don't try to convert PPC long double. 
llvm-svn: 50369
 2008-04-28 19:46:58 +00:00
Ted Kremenek
fd04109260 Add more alignment enums. 
llvm-svn: 50363
 2008-04-28 17:58:20 +00:00
Gordon Henriksen
0b2f0d3007 Expose parameter attributes via C bindings. 
Patch by Anders Johnsen!

llvm-svn: 50360
 2008-04-28 17:37:06 +00:00
Dan Gohman
0285c1e9bb Fix the SVOffset values for loads and stores produced by 
memcpy/memset expansion. It was a bug for the SVOffset value
to be used in the actual address calculations.

llvm-svn: 50359
 2008-04-28 17:15:20 +00:00
Mikhail Glushenkov
4c358b3125 Add support for response files to the CommandLine library. 
llvm-svn: 50355
 2008-04-28 16:44:25 +00:00
Chris Lattner
27fa922841 Remove the SmallVector ctor that converts from a SmallVectorImpl. This 
conversion open the door for many nasty implicit conversion issues, and
can be easily solved by initializing with (V.begin(), V.end()) when 
needed.

This patch includes many small cleanups for sdisel also.

llvm-svn: 50340
 2008-04-28 06:44:42 +00:00
Chris Lattner
89339f3a90 restore the copy ctor in SmallVector. This fixes serious 
errors I introduced in my last patch.

llvm-svn: 50338
 2008-04-28 06:32:08 +00:00
Chris Lattner
a03159bc35 generalize SmallVector copy ctor, there is no requirement for 
the initialization vector to have the same fixed size, just the
same element type.

llvm-svn: 50334
 2008-04-28 06:01:06 +00:00
Chris Lattner
39a4281deb Implement a signficant optimization for inline asm: 
When choosing between constraints with multiple options,
like "ir", test to see if we can use the 'i' constraint and
go with that if possible.  This produces more optimal ASM in
all cases (sparing a register and an instruction to load it),
and fixes inline asm like this:

void test () {
  asm volatile (" %c0 %1 " : : "imr" (42), "imr"(14));
}

Previously we would dump "42" into a memory location (which
is ok for the 'm' constraint) which would cause a problem
because the 'c' modifier is not valid on memory operands.

Isn't it great how inline asm turns 'missed optimization'
into 'compile failed'??

Incidentally, this was the todo in 
PowerPC/2007-04-24-InlineAsm-I-Modifier.ll

Please do NOT pull this into Tak.

llvm-svn: 50315
 2008-04-27 00:37:18 +00:00
Chris Lattner
b83aaaa855 Move a bunch of inline asm code out of line. 
llvm-svn: 50313
 2008-04-27 00:09:47 +00:00
Chris Lattner
b5bd654163 A few inline asm cleanups: 
- Make targetlowering.h fit in 80 cols.
  - Make LowerAsmOperandForConstraint const.
  - Make lowerXConstraint -> LowerXConstraint
  - Make LowerXConstraint return a const char* instead of taking a string byref.

llvm-svn: 50312
 2008-04-26 23:02:14 +00:00
Nick Lewycky
1f831c0f57 Remove 'unwinds to' support from mainline. This patch undoes r47802 r47989 
r48047 r48084 r48085 r48086 r48088 r48096 r48099 r48109 and r48123.

llvm-svn: 50265
 2008-04-25 16:53:59 +00:00
Ted Kremenek
247bdc8ec7 Implement != for DenseSet iterators. 
llvm-svn: 50236
 2008-04-24 23:49:45 +00:00
Ted Kremenek
100956926c Added iterator support for DenseSet. 
llvm-svn: 50235
 2008-04-24 23:48:12 +00:00
Evan Cheng
1a97cb159e - Check if a register is livein before removing it. It may have already been removed. 
- Do not iterate over SmallPtrSet, the order of iteration is not deterministic.

llvm-svn: 50209
 2008-04-24 09:06:33 +00:00
Anton Korobeynikov
b1ad6979dc Add facility for pre-RA passes 
llvm-svn: 50165
 2008-04-23 18:22:28 +00:00
Anton Korobeynikov
73935826d4 Make stack alignment options global for all targets 
llvm-svn: 50157
 2008-04-23 18:18:10 +00:00
Dan Gohman
3c6f2b3a6f Fix some whitespace. 
llvm-svn: 50151
 2008-04-23 17:50:15 +00:00
Chris Lattner
39e4b2e5d2 Enforce that multiple return values have to have at least one result. 
llvm-svn: 50137
 2008-04-23 05:36:34 +00:00
Nick Lewycky
97179cb16f Whoops! Undo r50087, unbreak the build. 
llvm-svn: 50088
 2008-04-22 05:20:06 +00:00
Nick Lewycky
e708ae5ffd Reverse r47989. Part of removing 'unwinds to' support. 
llvm-svn: 50087
 2008-04-22 05:16:51 +00:00
Chris Lattner
57e11a167d Move SplitBlockPredecessors out of loopsimplify into BasicBlockUtils.h 
as a global helper function.  At the same type, switch it from taking
a vector of predecessors to an arbitrary sequential input.  This allows
us to switch LoopSimplify to use a SmallVector for various temporary
vectors that it passed into SplitBlockPredecessors.

llvm-svn: 50020
 2008-04-21 01:28:02 +00:00
Chris Lattner
368e2b28bf add a handy helper method to instruction, useful for determining 
whether it is used outside of some block.  This can be used to see
if there are any non-local references, for example.

llvm-svn: 50004
 2008-04-20 22:11:30 +00:00
Chris Lattner
c8c74f39db Add a new Jump Threading pass, which will handle cases 
such as those in PR2235.  Right now the pass is not very
effective. :)

llvm-svn: 50000
 2008-04-20 20:35:01 +00:00
Dale Johannesen
15969b664d Check we aren't trying to convert PPC long double. 
This fixes the testsuite failure on ppcf128-4.ll.

llvm-svn: 49994
 2008-04-20 18:23:46 +00:00
Nicolas Geoffray
c80229e1c7 Cosmetic changes, as suggested by Evan. No functionality changes. 
llvm-svn: 49993
 2008-04-20 17:44:19 +00:00
Chris Lattner
d299f7b8cf Allow argpromote to promote struct arguments with a specified number 
of elements.  Patch by Matthijs Kooijman!

llvm-svn: 49962
 2008-04-19 19:50:01 +00:00
Nicolas Geoffray
f005e6fa3b Enable jitting with a known memory size. 
llvm-svn: 49924
 2008-04-18 20:59:31 +00:00
Dan Gohman
cfdb39da9c Remove the implicit conversion from SDOperandPtr to SDOperand*; this 
may fix a build error on Visual Studio.

llvm-svn: 49876
 2008-04-17 23:02:12 +00:00
Argyrios Kyrtzidis
2f4e52ee48 Bring in uint32_t, uint64_t, and int64_t types for MSVC. 
llvm-svn: 49854
 2008-04-17 13:56:31 +00:00
Roman Levenstein
2a2a386127 Minor clean-up based on Dan's comments. 
llvm-svn: 49844
 2008-04-17 09:29:48 +00:00
Scott Michel
4b37c88f48 Workaround for PR2207, in which pred_iterator assert gets triggered due to a 
wee problem in Xcode 2.[45]/gcc 4.0.1.

llvm-svn: 49831
 2008-04-16 23:46:39 +00:00
Dan Gohman
14ff970e58 Fix a copy+paste error in a comment. 
llvm-svn: 49820
 2008-04-16 21:57:29 +00:00
Nicolas Geoffray
1f3211af01 Correlate stubs with functions in JIT: when emitting a stub, the JIT tells the memory manager which function 
the stub will resolve.

llvm-svn: 49814
 2008-04-16 20:46:05 +00:00
Eric Christopher
3630cecfe4 Fix comment. 
llvm-svn: 49813
 2008-04-16 20:45:31 +00:00
Nicolas Geoffray
82baa2d2c6 Infrastructure for getting the machine code size of a function and an instruction. X86, PowerPC and ARM are implemented 
llvm-svn: 49809
 2008-04-16 20:10:13 +00:00
Bill Wendling
45432e8339 Add "empty()" method to sys::Path and remove unnecessary whitespace. 
Patch by Mikhail Glushenkov!

llvm-svn: 49803
 2008-04-16 18:27:02 +00:00
Roman Levenstein
728d59166f Ongoing work on improving the instruction selection infrastructure: 
Rename SDOperandImpl back to SDOperand.
Introduce the SDUse class that represents a use of the SDNode referred by
an SDOperand. Now it is more similar to Use/Value classes.

Patch is approved by Dan Gohman.

llvm-svn: 49795
 2008-04-16 16:15:27 +00:00
Gabor Greif
32b4942a0a merge of r49785 (from branches/ggreif/use-diet): pass V to dyn_cast by const reference, this avoids copy-constructing and destructing all the time. especially important if these constructors are not accessible 
llvm-svn: 49787
 2008-04-16 11:43:47 +00:00
Evan Cheng
6d05ce493b Rewrite LiveVariable liveness computation. The new implementation is much simplified. It eliminated the nasty recursive routines and removed the partial def / use bookkeeping. There is also potential for performance improvement by replacing the conservative handling of partial physical register definitions. The code is currently disabled until live interval analysis is taught of the name scheme. 
This patch also fixed a couple of nasty corner cases.

llvm-svn: 49784
 2008-04-16 09:46:40 +00:00
Owen Anderson
030428b435 Major repairs to the post-dominators implementation. Patch from Florian Brandner! 
llvm-svn: 49768
 2008-04-16 04:21:16 +00:00
Chris Lattner
3d52eb61ca fix off by one error. 
llvm-svn: 49766
 2008-04-16 04:10:37 +00:00
Chris Lattner
f24665de72 give smallstring some methods to do 'itoa'. 
llvm-svn: 49765
 2008-04-16 04:05:02 +00:00
Dale Johannesen
f45cadf9d2 Make 64-to-32 bit truncations explicit (prevent warnings). 
All values here fit in 32 bits.

llvm-svn: 49736
 2008-04-15 18:44:59 +00:00
Nicolas Geoffray
7e0110f724 Change Divided flag to Split, as suggested by Evan 
llvm-svn: 49715
 2008-04-15 08:08:50 +00:00
Evan Cheng
cff9295e43 Sort sub-registers and super-registers lists according to super-sub register relations. e.g. X86::RAX sub-register list is EAX, AX, AL, AH (order of last two are not guaranteed). 
llvm-svn: 49714
 2008-04-15 07:56:03 +00:00
Dan Gohman
3b99b3c807 Treat EntryToken nodes as "passive" so that they aren't added to the 
ScheduleDAG; they don't correspond to any actual instructions so they
don't need to be scheduled.

This fixes a bug where the EntryToken was being scheduled multiple
times in some cases, though it ended up not causing any trouble because 
EntryToken doesn't expand into anything. With this fixed the schedulers
reliably schedule the expected number of units, so we can check this
with an assertion.

This requires a tweak to test/CodeGen/X86/loop-hoist.ll because it
ends up getting scheduled differently in a trivial way, though it was
enough to fool the prcontext+grep that the test does.

llvm-svn: 49701
 2008-04-15 01:22:18 +00:00
Dan Gohman
dfa422fe9e In -view-sunit-dags, display "special" chain dependencies as cyan 
instead of blue to distinguish them from regular dependencies.

llvm-svn: 49696
 2008-04-14 23:15:07 +00:00
Dan Gohman
14dce3e51c Teach AliasSetTracker about VAArgInst. 
llvm-svn: 49674
 2008-04-14 18:34:50 +00:00
Dan Gohman
8d46278998 Fix const-correctness issues with the SrcValue handling in the 
memory intrinsic expansion code.

llvm-svn: 49666
 2008-04-14 17:55:48 +00:00
Dale Johannesen
edcba1161f Reverse sense of unwind-tables option. This means 
stack tracebacks on Darwin x86-64 won't work by default;
nevertheless, everybody but me thinks this is a good idea.

llvm-svn: 49663
 2008-04-14 17:54:17 +00:00
Dan Gohman
237a69b49c Clean up some comments. 
llvm-svn: 49661
 2008-04-14 17:45:20 +00:00
Chris Lattner
f63bdaf0b5 add a new CallGraphNode::removeCallEdgeFor method, tidy some comments. 
llvm-svn: 49617
 2008-04-13 19:41:25 +00:00
Chris Lattner
f5e5f92891 Add support for equality comparison of CallSite's. 
llvm-svn: 49616
 2008-04-13 19:40:26 +00:00
Nicolas Geoffray
ad5556e8ba Add a divided flag for the first piece of an argument divided into mulitple parts. Fixes PR1643 
llvm-svn: 49611
 2008-04-13 13:40:22 +00:00
Duncan Sands
c5f548f784 Merge LLVMBuilder and FoldingBuilder, calling 
the result IRBuilder.  Patch by Dominic Hamon.

llvm-svn: 49604
 2008-04-13 06:22:09 +00:00
Dan Gohman
15edbf989f Drop ISD::MEMSET, ISD::MEMMOVE, and ISD::MEMCPY, which are not Legal 
on any current target and aren't optimized in DAGCombiner. Instead
of using intermediate nodes, expand the operations, choosing between
simple loads/stores, target-specific code, and library calls,
immediately.

Previously, the code to emit optimized code for these operations
was only used at initial SelectionDAG construction time; now it is
used at all times. This fixes some cases where rep;movs was being
used for small copies where simple loads/stores would be better.

This also cleans up code that checks for alignments less than 4;
let the targets make that decision instead of doing it in
target-independent code. This allows x86 to use rep;movs in
low-alignment cases.

Also, this fixes a bug that resulted in the use of rep;stos for
memsets of 0 with non-constant memory size when the alignment was
at least 4. It's better to use the library in this case, which
can be significantly faster when the size is large.

This also preserves more SourceValue information when memory
intrinsics are lowered into simple loads/stores.

llvm-svn: 49572
 2008-04-12 04:36:06 +00:00
Evan Cheng
b389b78462 Use of implicit_def is not part of live interval. Create empty intervals for the uses when the live interval is being spilled. 
llvm-svn: 49542
 2008-04-11 17:53:36 +00:00
Chris Lattner
01e31663c8 improvements for IntrusiveRefCntPtr, patch by Mikhail Glushenkov 
llvm-svn: 49538
 2008-04-11 16:42:06 +00:00
Evan Cheng
52208a738f Allow registers defined by implicit_def to be clobbered. 
llvm-svn: 49512
 2008-04-10 23:47:53 +00:00
Dan Gohman
aa52f1c5b0 Fix a typo in a comment. 
llvm-svn: 49502
 2008-04-10 22:27:06 +00:00
Dan Gohman
b3a511b236 Make isVectorClearMaskLegal's operand list const. 
llvm-svn: 49446
 2008-04-09 20:09:42 +00:00
Dan Gohman
b05ea92f80 Fix some minor errors in comments. 
llvm-svn: 49445
 2008-04-09 20:08:06 +00:00
Dan Gohman
0586403622 Add const qualifiers. 
llvm-svn: 49443
 2008-04-09 18:31:41 +00:00
Dan Gohman
f03c4d87c0 Update comments to use 2.0 syntax type names. 
llvm-svn: 49442
 2008-04-09 18:24:25 +00:00
Chris Lattner
02cc33d0ad ConstantFP::get should be static. 
llvm-svn: 49434
 2008-04-09 17:16:28 +00:00
Owen Anderson
ca7e0e21f3 Factor a bunch of functionality related to memcpy and memset transforms out of 
GVN and into its own pass.

llvm-svn: 49419
 2008-04-09 08:23:16 +00:00
Evan Cheng
94983505c5 Unbreak teh build. 
llvm-svn: 49417
 2008-04-09 07:06:01 +00:00
Chris Lattner
9d4d2f566e add a version of ConstantFP::get that doesn't take a redundant Type* value, 
start migrating code over to use it.

llvm-svn: 49413
 2008-04-09 00:45:01 +00:00
Chris Lattner
6e11e1a381 make ConstantFP::isExactlyValue work for long double as well. 
llvm-svn: 49410
 2008-04-09 00:03:58 +00:00
Devang Patel
f08f0a6de6 Add CreateGetResult() 
llvm-svn: 49398
 2008-04-08 20:41:22 +00:00
Devang Patel
dd9f2ea01f Add multiple value return instruction constructor. 
llvm-svn: 49374
 2008-04-08 07:30:13 +00:00
Duncan Sands
f86399a00f Convenience method for setting the nounwind 
attribute for a function.

llvm-svn: 49373
 2008-04-08 07:23:58 +00:00
Dale Johannesen
ec0fe04044 Implement new llc flag -disable-required-unwind-tables. 
Corresponds to -fno-unwind-tables (usually default in gcc).

llvm-svn: 49361
 2008-04-08 00:10:24 +00:00
Ted Kremenek
be2279d470 Make getDirnameSep a static method (not part of Path's interface). 
llvm-svn: 49354
 2008-04-07 22:01:32 +00:00
Ted Kremenek
82b7e8d306 Added method Path::getDirname(). 
llvm-svn: 49352
 2008-04-07 21:53:57 +00:00
Sam Bishop
41916aad58 Added support for Create() calls that take an argument besides the 
deserializer.

llvm-svn: 49350
 2008-04-07 21:36:46 +00:00
Dan Gohman
d7301ea935 Rename MemOperand to MachineMemOperand. This was suggested by 
review feedback from Chris quite a while ago. No functionality
change.

llvm-svn: 49348
 2008-04-07 19:35:22 +00:00
Owen Anderson
4ad5a5201c Add operator= implementations to SparseBitVector, allowing it to be used in GVN. This results 
in both time and memory savings for GVN.  For example, one testcase went from 10.5s to 6s with
this patch.

llvm-svn: 49345
 2008-04-07 17:38:23 +00:00
Roman Levenstein
b40d332929 Re-commit of the r48822, where the infinite looping problem discovered 
by Dan Gohman is fixed.

llvm-svn: 49330
 2008-04-07 10:06:32 +00:00
Owen Anderson
93ab00f1d9 Make GVN more memory efficient, particularly on code that contains a large number of 
allocations, which GVN can't optimize anyways.

llvm-svn: 49329
 2008-04-07 09:59:07 +00:00
Gabor Greif
6c6b8a57f3 API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277
 2008-04-06 20:25:17 +00:00
Evan Cheng
9045e3dd2f Forgot this. 
llvm-svn: 49247
 2008-04-05 02:17:58 +00:00
Duncan Sands
9931451472 If a value is cast to its own type, then the cast 
is not needed.

llvm-svn: 49210
 2008-04-04 08:28:13 +00:00
Chris Lattner
0891662a49 Make ExecutionEngine::updateGlobalMapping return the old mapping. 
llvm-svn: 49206
 2008-04-04 04:47:41 +00:00
Ted Kremenek
2184f6cc1d Add member template version of SerializeTrait<T>::Create that also accepts 
an optional argument for us by T's Create method.

llvm-svn: 49169
 2008-04-03 16:44:37 +00:00
Evan Cheng
ff9c1655de Special handling of zero-sized live intervals. 
llvm-svn: 49167
 2008-04-03 16:40:27 +00:00
Evan Cheng
6250bfbd3e - Treat a live range defined by an implicit_def as a zero-sized one. 
- Eliminate an implicit_def when it's being spilled.

llvm-svn: 49166
 2008-04-03 16:39:43 +00:00
Evan Cheng
53c8db51dd Start of a series of patches related to implicit_def. 
There is no point in creating a long live range defined by an implicit_def. Scheduler now duplicates implicit_def instruction for each of its uses. Therefore, if an implicit_def node has multiple uses, it will become a number of very short live ranges, rather than a long one. This will make coalescer's job easier.

llvm-svn: 49164
 2008-04-03 16:36:07 +00:00
Evan Cheng
497c607fae Backing out 48222 temporarily. 
llvm-svn: 49124
 2008-04-03 03:13:16 +00:00
David Greene
0ca05878fe Iterators folloring a SmallVector erased element are invalidated so 
don't access cached iterators from after the erased element.

Re-apply 49056 with SmallVector support.

llvm-svn: 49106
 2008-04-02 18:24:46 +00:00
Evan Cheng
748a0c9215 Now that I am told MachineRegisterInfo also tracks physical register uses / defs, I can do away with the horribleness I introduced a while back. It's impossible to detect if there is any use of a physical register below an instruction (and before any def of the register) with some cheap book keeping. 
llvm-svn: 49105
 2008-04-02 18:04:08 +00:00
Evan Cheng
4e841d67ed Remove #include<map> from LiveVariables.h. Not referenced. 
llvm-svn: 49099
 2008-04-02 17:23:50 +00:00
Torok Edwin
b96b953a5c Add new file Support/DataFlow.h. 
It allows Use-Def and Def-Use relations to be treated as graphs.

llvm-svn: 49088
 2008-04-02 14:57:52 +00:00
Anton Korobeynikov
d3330dfbf6 Add new CC lowering rule: provide a list of registers, which can be 'shadowed', 
when some another register is used for argument passing.
Currently is used on Win64.

llvm-svn: 49079
 2008-04-02 05:23:57 +00:00
Dale Johannesen
79633a914f Recommitting EH patch; this should answer most of the 
review feedback.
-enable-eh is still accepted but doesn't do anything.
EH intrinsics use Dwarf EH if the target supports that,
and are handled by LowerInvoke otherwise.
The separation of the EH table and frame move data is,
I think, logically figured out, but either one still
causes full EH info to be generated (not sure how to
split the metadata correctly).
MachineModuleInfo::needsFrameInfo is no longer used and
is removed.

llvm-svn: 49064
 2008-04-02 00:25:04 +00:00
Chris Lattner
d141d16ed7 Change the MemoryBuffer::getFile* methods to take just a pointer to the 
start of a filename, not a filename+length.  All clients can produce a
null terminated name, and the system api's require null terminated 
strings anyway.

llvm-svn: 49041
 2008-04-01 18:04:03 +00:00
Chris Lattner
4614369b45 MappedFile is dead, remove it. 
llvm-svn: 49035
 2008-04-01 06:20:44 +00:00