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Author SHA1 Message Date
Chris Lattner
c22d4d1500 unify the code that determines whether it is a good idea to change the type 
of a computation.  This fixes some infinite loops when dealing with TD that
has no native types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86670 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 07:23:37 +00:00
Nick Lewycky
7cef178176 Simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86668 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 07:00:43 +00:00
Nick Lewycky
58571d663c Reapply r86359, "Teach dead store elimination that certain intrinsics write to 
memory just like a store" with bug fixed (partial-overwrite.ll is the
regression test).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86667 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 06:46:40 +00:00
Chris Lattner
dce94d92df refactor TryToSimplifyUncondBranchFromEmptyBlock out of SimplifyCFG. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86666 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 05:59:26 +00:00
Oscar Fuentes
c5e1ae1313 CMake: Support for building llvm loadable modules. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86656 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 02:45:37 +00:00
Daniel Dunbar
6f479e597c lit: Start documentation testing architecture. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86655 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 02:41:27 +00:00
Daniel Dunbar
6c1c9cfc65 lit: Add ExampleTests, for testing lit and demonstrating test suite features. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86654 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 02:41:17 +00:00
Daniel Dunbar
972cc05c23 lit: Fix bug in --show-suites which accidentally override the list of tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86653 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 02:40:21 +00:00
Bruno Cardoso Lopes
734516d1f6 Fix PR5445 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86651 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 02:35:13 +00:00
Chris Lattner
70ce6d0819 I misread the parens, not so redundant after all. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86648 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 02:04:54 +00:00
Chris Lattner
fddcf47a24 make jump threading recursively simplify expressions instead of doing it 
just one level deep.  On the testcase we go from getting this:

F1:                                               ; preds = %T2
  %F = and i1 true, %cond                         ; <i1> [#uses=1]
  br i1 %F, label %X, label %Y

to a fully threaded:

F1:                                               ; preds = %T2
  br label %Y


This changes gets us to the point where we're forming (too many) switch 
instructions on doug's strswitch testcase.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86646 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:57:31 +00:00
Chris Lattner
9f3ce36d7e remove some redundant parens. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86645 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:56:04 +00:00
Oscar Fuentes
3171f33bc2 CMake: Remove unnecessary `unset' which was not supported by old cmake 
releases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86644 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:45:05 +00:00
Dan Gohman
7071528e4e Remove an unused variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86642 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:37:57 +00:00
Dan Gohman
b2e40990c4 Minor code simplification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86641 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:36:20 +00:00
Dan Gohman
7dd126cf4f Trim a bunch of unneeded code from this testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86640 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:33:08 +00:00
Chris Lattner
e7c90967b1 don't invalidate PN, rewrite of this code is in progress anyway. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86639 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:19:06 +00:00
Chris Lattner
e34537856a add a new SimplifyInstruction API, which is like ConstantFoldInstruction, 
except that the result may not be a constant.  Switch jump threading to 
use it so that it gets things like (X & 0) -> 0, which occur when phi preds
are deleted and the remaining phi pred was a zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86637 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:08:51 +00:00
Jeffrey Yasskin
81cf432569 Fix DenseMap iterator constness. 
This patch forbids implicit conversion of DenseMap::const_iterator to
DenseMap::iterator which was possible because DenseMapIterator inherited
(publicly) from DenseMapConstIterator. Conversion the other way around is now
allowed as one may expect.

The template DenseMapConstIterator is removed and the template parameter
IsConst which specifies whether the iterator is constant is added to
DenseMapIterator.

Actually IsConst parameter is not necessary since the constness can be
determined from KeyT but this is not relevant to the fix and can be addressed
later.

Patch by Victor Zverovich!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86636 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 01:02:17 +00:00
Chris Lattner
d06094f068 factor simplification logic for AND and OR out to InstSimplify from instcombine. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86635 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:55:12 +00:00
David Goodwin
c2e8a7e8d2 Fixed to address code review. No functional changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86634 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:48:55 +00:00
Daniel Dunbar
d65267ee62 Fix MemoryBuffer::getSTDIN to *not* return null if stdin is empty, this is a lame API. 
Also, Stringrefify some more MemoryBuffer functions, and add two performance FIXMEs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86630 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:43:58 +00:00
David Goodwin
0855dee564 Allow targets to specify register classes whose member registers should not be renamed to break anti-dependencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86628 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:15:47 +00:00
Chris Lattner
210c5d4880 pull a bunch of logic out of instcombine into instsimplify for compare 
simplification, this handles the foldable fcmp x,x cases among many others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86627 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:55:12 +00:00
Dan Gohman
1ba3b6c565 Pass the (optional) TargetData object to ConstantFoldInstOperands 
and ConstantFoldCompareInstOperands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86626 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:34:17 +00:00
Chris Lattner
b0bdac06b2 inline a simple function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86625 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:31:49 +00:00
Chris Lattner
9dbb42944c rename SimplifyCompare -> SimplifyCmpInst and split it into 
Simplify[IF]Cmp pieces.  Add some predicates to CmpInst to 
determine whether a predicate is fp or int.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86624 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:28:39 +00:00
Jim Grosbach
803b48a155 Now that the default is 'enabled,' a separate command line option for ARM is 
not necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86621 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:11:45 +00:00
Mike Stump
75adb32c60 Add testcase for recent checkin. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86620 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:10:49 +00:00
Chris Lattner
8f73deaa87 fix ConstantFoldCompareInstOperands to take the LHS/RHS as 
individual operands instead of taking a temporary array


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86619 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:06:58 +00:00
Daniel Dunbar
38424c9b5d Add StringSwitch::Cases overloads, for matching multiple strings to a single 
value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86618 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:05:44 +00:00
Chris Lattner
9819ef7742 use instructionsimplify instead of a weak clone of ad-hoc folding stuff. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86616 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 23:00:14 +00:00
Jim Grosbach
3f51147d44 Update test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86614 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:59:01 +00:00
Chris Lattner
9f3c25aeb3 stub out a new libanalysis "instruction simplify" interface that 
takes decimated instructions and applies identities to them.  This
is pretty minimal at this point, but I plan to pull some instcombine
logic out into these and similar routines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86613 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:57:59 +00:00
Jeffrey Yasskin
6f348e4586 Remove dlsym stubs, with Nate Begeman's permission. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86606 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:34:19 +00:00
Jim Grosbach
92eb919e80 Enable dynamic stack realignment by default. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86604 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:32:40 +00:00
Chris Lattner
c2c23d03df stub out a new form of BasicBlock::RemovePredecessorAndSimplify which 
simplifies instruction users of PHIs when the phi is eliminated.  This
will be moved to transforms/utils after some other refactoring.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86603 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:32:36 +00:00
Jim Grosbach
ad353c74ad Set dynamic stack realignment to real values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86602 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:32:03 +00:00
Dan Gohman
ba565bfc21 Remove an unneeded #include. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86601 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:28:30 +00:00
Mike Stump
70e5e6834c Fix for 64-bit builds. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86600 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 22:28:21 +00:00
Bill Wendling
2718e43d6a Similar to r86588, but for Darwin this time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86592 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 21:45:26 +00:00
Bill Wendling
b1ec31d711 The jump table was being generated before the end label for exception handling 
was generated. This caused code like this:

## The asm code for the function
        .section        __TEXT,__const
        .align  2
lJTI11_0:
LJTI11_0:
        .long    LBB11_16
        .long    LBB11_4
        .long    LBB11_5
        .long    LBB11_6
        .long    LBB11_7
        .long    LBB11_8
        .long    LBB11_9
        .long    LBB11_10
        .long    LBB11_11
        .long    LBB11_12
        .long    LBB11_13
        .long    LBB11_14
Leh_func_end11:   ## <---now in the wrong section!

The `Leh_func_end11' would then end up in the wrong section, causing the
resulting EH frame information to be wrong:

__ZL11CheckRightsjPKcbRbRP6NSData.eh:
    .set    Lset500eh,Leh_frame_end11-Leh_frame_begin11
    .long   Lset500eh  ; Length of Frame Information Entry                                                                                                                   
Leh_frame_begin11:
    .long   Leh_frame_begin11-Leh_frame_common
    .long   Leh_func_begin11-.
    .set    Lset501eh,Leh_func_end11-Leh_func_begin11
    .long   Lset501eh                                   ; FDE address range                                                                                                                                   
`Lset501eh' is now something huge instead of the real value.

The X86 back-end generates the jump table after the EH information is
emitted. Do the same here.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86588 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 21:20:14 +00:00
Dan Gohman
80f6c58981 Print "..." instead of all the uninteresting register clobbers on call 
instructions. This makes CodeGen dumps significantly less noisy.

Example before:
  BL <ga:@bar>, %R0<imp-def>, %R1<imp-def,dead>, %R2<imp-def,dead>, %R3<imp-def,dead>, %R12<imp-def,dead>, %LR<imp-def,dead>, %D0<imp-def,dead>, %D1<imp-def,dead>, %D2<imp-def,dead>, %D3<imp-def,dead>, %D4<imp-def,dead>, %D5<imp-def,dead>, %D6<imp-def,dead>, %D7<imp-def,dead>, %D16<imp-def,dead>, %D17<imp-def,dead>, %D18<imp-def,dead>, %D19<imp-def,dead>, %D20<imp-def,dead>, %D21<imp-def,dead>, %D22<imp-def,dead>, %D23<imp-def,dead>, %D24<imp-def,dead>, %D25<imp-def,dead>, %D26<imp-def,dead>, %D27<imp-def,dead>, %D28<imp-def,dead>, %D29<imp-def,dead>, %D30<imp-def,dead>, %D31<imp-def,dead>, %CPSR<imp-def,dead>, %FPSCR<imp-def,dead>

Same example after:
  BL <ga:@bar>, %R0<imp-def>, %R1<imp-def,dead>, %LR<imp-def,dead>, %CPSR<imp-def,dead>, ...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86583 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 19:38:45 +00:00
Dan Gohman
f75ef668a7 Default-addressspace null pointers don't alias anything. This allows 
GVN to be more aggressive. Patch by Hans Wennborg! (with a comment added by me)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86582 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 19:29:11 +00:00
David Goodwin
980d494ab6 Fix dependencies added to model memory aliasing for post-RA scheduling. The dependencies were overly conservative for memory access that are known not to alias. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86580 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 19:22:17 +00:00
Dan Gohman
7657f6b002 The inbounds keyword isn't relevant to overindexing of 
static array types. Thanks to Duncan for pointing this out!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86576 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 19:01:53 +00:00
Dan Gohman
eaa181c83a Fix a comment in a typo that Duncan noticed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86575 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 18:59:22 +00:00
Dan Gohman
9384438071 Remove the "special case" for zero-length arrays, and rephrase this 
paragraph to be more precise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86572 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 18:40:39 +00:00
Dan Gohman
f6572d0aa2 Generalize LCSSA to handle loops with exits with predecessors outside 
the loop. This is needed because with indirectbr it may not be possible
for LoopSimplify to guarantee that all loop exit predecessors are
inside the loop. This fixes PR5437.

LCCSA no longer actually requires LoopSimplify form, but for now it
must still have the dependency because the PassManager doesn't know
how to schedule LoopSimplify otherwise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86569 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 18:28:24 +00:00
Dan Gohman
d146e986c8 Fix an 80-column violation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86567 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 18:20:38 +00:00