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Author SHA1 Message Date
Dan Gohman
50936c7c4b It's not necessary to clear out the Size and TBAATag at each of 
these points.

llvm-svn: 118752
 2010-11-11 00:42:22 +00:00
Dan Gohman
b476dc0f55 Set NonLocalDepInfo's Size field to UnknownSize when invalidating 
it, so that it doesn't appear to be a known size.

llvm-svn: 118748
 2010-11-11 00:20:27 +00:00
Jakob Stoklund Olesen
313b78d28e Insert two blank SlotIndexes between basic blocks instead of just one. 
This is the first small step towards using closed intervals for liveness instead
of the half-open intervals we're using now.

We want to be able to distinguish between a SlotIndex that represents a variable
being live-out of a basic block, and an index representing a variable live-in to
its successor.

That requires two separate indexes between blocks. One for live-outs and one for
live-ins.

With this change, getMBBEndIdx(MBB).getPrevSlot() becomes stable so it stays
greater than any instructions inserted at the end of MBB.

llvm-svn: 118747
 2010-11-11 00:19:20 +00:00
Devang Patel
a4eeec4604 Document debuginfo-tests. 
llvm-svn: 118746
 2010-11-11 00:13:39 +00:00
Jakob Stoklund Olesen
3eb4a7b12d Delete unused function. 
llvm-svn: 118743
 2010-11-10 23:56:02 +00:00
Jakob Stoklund Olesen
2f72fda7ef No need to add liveness that's already there. 
llvm-svn: 118742
 2010-11-10 23:56:00 +00:00
Jakob Stoklund Olesen
6a63cbe06d Hook up AliasAnalysis in InlineSpiller. This is used for rematerializing 
constant loads.

llvm-svn: 118741
 2010-11-10 23:55:56 +00:00
Jim Grosbach
2c1d6373ab Move LDM predicate operand encoding into base clase. Add STM missing STM 
encoding bits.

llvm-svn: 118738
 2010-11-10 23:44:32 +00:00
Jim Grosbach
ad037e5ded ARM LDM encoding for the mode (ia, ib, da, db) operand. 
llvm-svn: 118736
 2010-11-10 23:38:36 +00:00
Rafael Espindola
6ee5a9491d Factor some code into WriteSection. 
llvm-svn: 118733
 2010-11-10 23:36:59 +00:00
Jim Grosbach
ef95eee920 Fix ARM encoding of non-return LDM instructions. 
llvm-svn: 118732
 2010-11-10 23:18:49 +00:00
Jim Grosbach
d832c84199 Fix ARM encoding of LDM+Return instruction. 
llvm-svn: 118730
 2010-11-10 23:12:48 +00:00
Dan Gohman
8895f1c5d5 When clearing a non-local pointer dependency cache entry, clear 
the reverse map too. This fixes seflhost build errors.

llvm-svn: 118729
 2010-11-10 22:35:02 +00:00
Rafael Espindola
281431a034 Update the section index map after we add the medatada sections. 
llvm-svn: 118728
 2010-11-10 22:34:07 +00:00
Devang Patel
5520a6fc97 Take care of special characters while creating named MDNode name to hold function specific local variable's info. 
This fixes radar 8653152. I am checking in testcase as a separate check-in.

llvm-svn: 118726
 2010-11-10 22:19:21 +00:00
Rafael Espindola
576f8dd869 Use SectionIndexMap in WriteSymbolTable to make it a little less brittle. 
llvm-svn: 118725
 2010-11-10 22:16:43 +00:00
Dan Gohman
543edf7e84 Factor out the code for computing an AliasAnalysis::Location 
for a given instruction into a helper function.

llvm-svn: 118723
 2010-11-10 21:51:35 +00:00
Rafael Espindola
d3696f41c7 Factor some code into ComputeIndexMap. 
llvm-svn: 118722
 2010-11-10 21:51:05 +00:00
Dan Gohman
aef3e95364 Fully invalidate cached results when a prior query's size or 
type is insufficient for, or incompatible with, the current query.

llvm-svn: 118721
 2010-11-10 21:45:11 +00:00
Nate Begeman
c4fabeabb9 Fix an issue where we tried to turn a v2f32 build_vector into a v4i32 build vector with 2 elts 
llvm-svn: 118720
 2010-11-10 21:35:41 +00:00
Duncan Sands
815e967d98 Reduce the maximum recursion depth, 5 seems pointlessly too much. 
Probably it should just be 1, but compromise with 3.

llvm-svn: 118718
 2010-11-10 20:53:24 +00:00
Dan Gohman
2b4e8302a6 Enhance GVN to do more precise alias queries for non-local memory 
references. For example, this allows gvn to eliminate the load in
this example:

  void foo(int n, int* p, int *q) {
    p[0] = 0;
    p[1] = 1;
    if (n) {
      *q = p[0];
    }
  }

llvm-svn: 118714
 2010-11-10 20:37:15 +00:00
Rafael Espindola
859cfe5bbd Change the String<size> methods to take a fragment instead of a buffer. 
llvm-svn: 118709
 2010-11-10 20:02:59 +00:00
Jakob Stoklund Olesen
00c4d94862 Basic rematerialization during splitting. 
Whenever splitting wants to insert a copy, it checks if the value can be
rematerialized cheaply instead.

Missing features:
- Delete instructions when all uses have been rematerialized.
- Truncate live ranges to the remaining uses after rematerialization.

llvm-svn: 118702
 2010-11-10 19:31:50 +00:00
Andrew Trick
9d60f59b55 RABasic is nearly functionally complete. There are a few remaining 
benchmarks hitting an assertion.
Adds LiveIntervalUnion::collectInterferingVRegs.
Fixes "late spilling" by checking for any unspillable live vregs among
all physReg aliases.

llvm-svn: 118701
 2010-11-10 19:18:47 +00:00
Rafael Espindola
d05bf9ffe0 Use MCSectionELF in places we know we have an ELF section. 
llvm-svn: 118699
 2010-11-10 19:05:07 +00:00
Dan Gohman
efbd98c352 Use getValueOperand() and getPointerOperand() on load and store 
instructions instead of hard-coding operand numbers.

llvm-svn: 118698
 2010-11-10 19:03:33 +00:00
Dan Gohman
04e46fa78b Rename AccessesArguments and AccessesArgumentsReadonly, and rewrite 
their comments.

llvm-svn: 118696
 2010-11-10 18:30:00 +00:00
Duncan Sands
8531f14f5b Teach InstructionSimplify how to look through PHI nodes. Since PHI 
nodes can be used in loops, this could result in infinite looping
if there is no recursion limit, so add such a limit.  It is also
used for the SelectInst case because in theory there could be an
infinite loop there too if the basic block is unreachable.

llvm-svn: 118694
 2010-11-10 18:23:01 +00:00
Dan Gohman
271a238243 Fix a copy+pasto Duncan noticed. 
llvm-svn: 118693
 2010-11-10 18:18:23 +00:00
Dan Gohman
65a3841f03 Add a doesAccessArgPointees helper function, and update code to use 
it, and to be consistent.

llvm-svn: 118692
 2010-11-10 18:17:28 +00:00
Jim Grosbach
c5001c0f1d Simplify and clean up MC symbol lookup for ARM constant pool values. This fixes 
double quoting of ObjC symbol names in constant pool entries.

rdar://8652107

llvm-svn: 118688
 2010-11-10 17:59:10 +00:00
Dan Gohman
9ae50022a1 Factor out the code for testing whether a function accesses 
arbitrary memory into a helper function, and adjust some comments.

llvm-svn: 118687
 2010-11-10 17:34:04 +00:00
Dan Gohman
3cc59e791f Give NonLocalDepResult a NonLocalDepEntry member, replacing 
indivudal members holding the same data, to clarify the relationship
between NonLocalDepResult and NonLocalDepEntry.

llvm-svn: 118686
 2010-11-10 17:15:52 +00:00
Tobias Grosser
d0af23f2b6 Detect if llvm-gcc is built on dragonegg. 
Store the flags needed to disable optimizations and to emit LLVM-IR depending on
the version of llvm-gcc used.

llvm-svn: 118684
 2010-11-10 16:31:34 +00:00
Michael J. Spencer
db71d89716 Fix Whitespace. 
llvm-svn: 118683
 2010-11-10 15:06:00 +00:00
Michael J. Spencer
000dd79ae8 System/Path: Update comments to match code. 
llvm-svn: 118682
 2010-11-10 15:05:50 +00:00
Michael J. Spencer
c3e664a431 System/Win32/Path: Implement isSymLink. 
llvm-svn: 118681
 2010-11-10 15:05:39 +00:00
Duncan Sands
1ecf1f999e Simplify binary operations where one operand is a select instruction. 
The simplifications performed here never create new instructions, they
only return existing instructions (or a constant), and so are always a
win.  In theory they should transform (for example)
  %z = and i32 %x, %y
  %s = select i1 %cond, i32 %y, i32 %z
  %r = and i32 %x, %s
into
  %r = and i32 %x, y
but in practice they get into a fight with instcombine, and lose.
Unfortunately instcombine does a poor job in this case.  Nonetheless
I'm committing this transform to make it easier to discuss what to
do to make peace with instcombine.

llvm-svn: 118679
 2010-11-10 13:00:08 +00:00
NAKAMURA Takumi
84f55bb902 Win32/Process.inc: [PR8527] Process::FileDescriptorIsDisplayed(fd) should not check by FILE_TYPE_CHAR. It must be better to check it with Console API. 
The special file "NUL" is FILE_TYPE_CHAR with GetFileType(h). It was treated as display device and discarding output to NUL had failed. (eg. opt -o nul)

llvm-svn: 118678
 2010-11-10 08:37:47 +00:00
Duncan Sands
7f44d33a4c There is no EndPtr anymore - reinterpret the original comment in terms 
of InputData.

llvm-svn: 118677
 2010-11-10 07:46:36 +00:00
Jim Grosbach
4e3653e4e1 Update ARMConstantPoolValue to not use a modifier string. Use an explicit 
VariantKind marker to indicate the additional information necessary. Update
MC to handle the new Kinds. rdar://8647623

llvm-svn: 118671
 2010-11-10 03:26:07 +00:00
Bruno Cardoso Lopes
c911863e01 Add a test to the previous added clo instruction. Patch by Akira again 
llvm-svn: 118668
 2010-11-10 02:22:44 +00:00
Bruno Cardoso Lopes
2266e58196 Add clo instruction. Patch by Akira Hatanaka (ahatanaka@mips.com) with some minor tweaks 
llvm-svn: 118667
 2010-11-10 02:13:22 +00:00
Dale Johannesen
24a82bdec2 When checking that the necessary bits are zero in 
order to reduce ((x<<30)>>24) to x<<6, check the
correct bits.  PR 8547.

llvm-svn: 118665
 2010-11-10 01:30:56 +00:00
Bill Wendling
87c781b411 Emit a '!' if this is a "writeback" register or memory address. 
llvm-svn: 118662
 2010-11-10 01:07:54 +00:00
Jakob Stoklund Olesen
e259b04730 Simplify the LiveRangeEdit::canRematerializeAt() interface a bit. 
llvm-svn: 118661
 2010-11-10 01:05:12 +00:00
Dan Gohman
1571dfc883 Make ModRefBehavior a lattice. Use this to clean up AliasAnalysis 
chaining and simplify FunctionAttrs' GetModRefBehavior logic.

llvm-svn: 118660
 2010-11-10 01:02:18 +00:00
Matt Beaumont-Gay
993d07638e Rename a parameter to avoid confusion with a local variable 
llvm-svn: 118656
 2010-11-10 00:08:58 +00:00
Bill Wendling
0c082b811f Emit the warning about the register list not being in ascending order only once. 
llvm-svn: 118653
 2010-11-09 23:45:59 +00:00