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57e11a167d
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381 Commits

Author SHA1 Message Date
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
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
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
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
d01a2a18f8 Increasing the inline limit from (overly conservative) 200 to 300. Given each BB costs 20 and each instruction costs 5, 200 means a 4 BB function + 24 instructions (actually less because caller's size also contributes to it). 
Furthermore, double the limit when more than 10% of the callee instructions are vector instructions. Multimedia kernels tend to love inlining.

llvm-svn: 48725
 2008-03-24 06:37:48 +00:00
Andrew Lenharth
2ff2bcbde8 FunctionExtractorPass has been superceded by GVExtractorPass 
llvm-svn: 48648
 2008-03-21 16:46:53 +00:00
Andrew Lenharth
6c788376e9 add a pass that can extract all kinds of global values, not just functions. Update llvm-extract to use it and optionally extract a global variable if you want it too 
llvm-svn: 48015
 2008-03-07 19:51:57 +00:00
Gabor Greif
d746841e93 fix typos 
llvm-svn: 47994
 2008-03-06 10:36:00 +00:00
Devang Patel
cb72d92471 Add pass to promote sret. 
This pass transforms 

  %struct._Point = type { i32, i32, i32, i32, i32, i32 }
  define internal void @foo(%struct._Point* sret  %agg.result)

into

  %struct._Point = type { i32, i32, i32, i32, i32, i32 }
  define internal %struct._Point @foo()

This pass updates foo() clients appropriately to use
getresult instruction to extract return values.

This pass is not yet ready for prime time.

llvm-svn: 47776
 2008-02-29 23:34:08 +00:00
Chris Lattner
9fb1d740a6 prune #includes, fit in 80 cols. 
llvm-svn: 47556
 2008-02-25 19:21:38 +00:00
Chris Lattner
ae2f8bc116 remove the LowerSelect pass. The last client was the old Sparc backend, which is long dead by now. 
llvm-svn: 47323
 2008-02-19 07:49:17 +00:00
Chris Lattner
010e9fb704 remove the lower packed pass. It can never work and even the parts that 
could work don't work fully.  This fixes PR1705.  Oh yeah, we don't have
packed types anymore either ;-)

llvm-svn: 47322
 2008-02-19 07:39:17 +00:00
Bill Wendling
629a569ce9 The CorrelatedExpressionElimination pass is known to be buggy. Remove it. 
This fixes PR1769.

llvm-svn: 46408
 2008-01-27 06:11:41 +00:00
Chris Lattner
fb5876f0be Allow clients to specify the inline threshold when creating 
the inliner pass.  Patch by Robert Zeh.

llvm-svn: 45903
 2008-01-12 06:49:13 +00:00
Chris Lattner
ff7707de37 don't include loopinfo.h from this file. 
llvm-svn: 45858
 2008-01-11 06:30:04 +00:00
Gordon Henriksen
db4f51e1b9 With this patch, the LowerGC transformation becomes the 
ShadowStackCollector, which additionally has reduced overhead with
no sacrifice in portability.

Considering a function @fun with 8 loop-local roots,
ShadowStackCollector introduces the following overhead
(x86):

; shadowstack prologue
        movl    L_llvm_gc_root_chain$non_lazy_ptr, %eax
        movl    (%eax), %ecx
        movl    $___gc_fun, 20(%esp)
        movl    $0, 24(%esp)
        movl    $0, 28(%esp)
        movl    $0, 32(%esp)
        movl    $0, 36(%esp)
        movl    $0, 40(%esp)
        movl    $0, 44(%esp)
        movl    $0, 48(%esp)
        movl    $0, 52(%esp)
        movl    %ecx, 16(%esp)
        leal    16(%esp), %ecx
        movl    %ecx, (%eax)

; shadowstack loop overhead
        (none)

; shadowstack epilogue
        movl    48(%esp), %edx
        movl    %edx, (%ecx)

; shadowstack metadata
        .align  3
___gc_fun:                              # __gc_fun
        .long   8
        .space  4

In comparison to LowerGC:

; lowergc prologue
        movl    L_llvm_gc_root_chain$non_lazy_ptr, %eax
        movl    (%eax), %ecx
        movl    %ecx, 48(%esp)
        movl    $8, 52(%esp)
        movl    $0, 60(%esp)
        movl    $0, 56(%esp)
        movl    $0, 68(%esp)
        movl    $0, 64(%esp)
        movl    $0, 76(%esp)
        movl    $0, 72(%esp)
        movl    $0, 84(%esp)
        movl    $0, 80(%esp)
        movl    $0, 92(%esp)
        movl    $0, 88(%esp)
        movl    $0, 100(%esp)
        movl    $0, 96(%esp)
        movl    $0, 108(%esp)
        movl    $0, 104(%esp)
        movl    $0, 116(%esp)
        movl    $0, 112(%esp)

; lowergc loop overhead
        leal    44(%esp), %eax
        movl    %eax, 56(%esp)
        leal    40(%esp), %eax
        movl    %eax, 64(%esp)
        leal    36(%esp), %eax
        movl    %eax, 72(%esp)
        leal    32(%esp), %eax
        movl    %eax, 80(%esp)
        leal    28(%esp), %eax
        movl    %eax, 88(%esp)
        leal    24(%esp), %eax
        movl    %eax, 96(%esp)
        leal    20(%esp), %eax
        movl    %eax, 104(%esp)
        leal    16(%esp), %eax
        movl    %eax, 112(%esp)

; lowergc epilogue
        movl    48(%esp), %edx
        movl    %edx, (%ecx)

; lowergc metadata
        (none)

llvm-svn: 45670
 2008-01-07 01:30:53 +00:00
Chris Lattner
a09bc3d9a4 back out accidental commit. 
llvm-svn: 45660
 2008-01-06 19:19:32 +00:00
Chris Lattner
5489888580 rename isStore -> mayStore to more accurately reflect what it captures. 
llvm-svn: 45656
 2008-01-06 08:36:04 +00:00
Owen Anderson
6c7beb1748 Didn't mean to commit this. 
llvm-svn: 45607
 2008-01-05 00:43:37 +00:00
Owen Anderson
2adf8c5533 Move some more functionality from MRegisterInfo to TargetInstrInfo. 
llvm-svn: 45603
 2008-01-04 23:57:37 +00:00
Chris Lattner
e0b1ee937a Don't attribute in file headers anymore. See llvmdev for the 
discussion of this change.  Boy are my fingers tired. ;-)

llvm-svn: 45411
 2007-12-29 19:59:42 +00:00
Owen Anderson
7b92dab615 Start the process of making MachineLoopInfo possible by templating Loop. 
llvm-svn: 44097
 2007-11-14 02:33:58 +00:00
Anton Korobeynikov
8ab03c9d1c Make this header public 
llvm-svn: 43938
 2007-11-09 12:16:58 +00:00
Gordon Henriksen
8188f028a2 Deleting redundant copy of block extractor pass. See also PR1775. 
llvm-svn: 43694
 2007-11-05 01:54:05 +00:00
Anton Korobeynikov
bcee4726bf Reg2Mem cleanup and optimizations: 
- enable phi instructions demotion to stack
 - create alloca instructions in the entry block

llvm-svn: 43208
 2007-10-21 23:05:16 +00:00
Hartmut Kaiser
ed12f66488 Updated VC++ build system. 
Silenced some VC warnings.

I'm getting linker errors, though: unresolved externals:

llvm::Split<class llvm::BasicBlock *,struct llvm::GraphTraits<class llvm::BasicBlock *> >(class llvm::DominatorTreeBase<class llvm::BasicBlock> &,class llvm::BasicBlock *)

and

llvm::Split<struct llvm::Inverse<class llvm::BasicBlock *>,struct llvm::GraphTraits<struct llvm::Inverse<class llvm::BasicBlock *> > >(class llvm::DominatorTreeBase<class llvm::BasicBlock> &,class llvm::BasicBlock *)

Where are these defined?

llvm-svn: 43073
 2007-10-17 14:56:40 +00:00
Owen Anderson
a37895cfee Remove RLE from the headers, since the pass itself is gone now. 
llvm-svn: 41971
 2007-09-14 22:54:46 +00:00
Devang Patel
d412a2a0ed Add utility to clone loops. 
llvm-svn: 40997
 2007-08-10 17:59:47 +00:00
Chris Lattner
15b13dc5f9 add #ifndef guards 
llvm-svn: 40990
 2007-08-10 15:53:08 +00:00
Devang Patel
8289b6e663 Fix comment. 
llvm-svn: 40911
 2007-08-07 23:16:03 +00:00
Devang Patel
228dc09ff6 Begin loop index split pass. 
llvm-svn: 40883
 2007-08-07 00:25:56 +00:00
Dan Gohman
7dd04fb91c More explicit keywords. 
llvm-svn: 40673
 2007-08-01 15:32:29 +00:00
Owen Anderson
58e64df595 Rename FastDSE to just DSE. 
llvm-svn: 40668
 2007-08-01 06:36:51 +00:00
Devang Patel
a03e82d7ee Use SmallPtrSet. 
llvm-svn: 40560
 2007-07-27 18:34:27 +00:00
Devang Patel
d7b401bafd Add BasicInliner interface. 
This interface allows clients to inline bunch of functions with module
level call graph information.:wq

llvm-svn: 40486
 2007-07-25 18:00:25 +00:00
Owen Anderson
eb9f1b612c Add a GVN pass, using the value numbering code I developed for GVNPRE and the 
load elimination code from RedundantLoadElimination.

llvm-svn: 40469
 2007-07-24 17:55:58 +00:00
Owen Anderson
5969a3cb91 Rename a lot of things to change FastDLE to RedundantLoadElimination. 
llvm-svn: 40457
 2007-07-24 00:17:04 +00:00
Owen Anderson
0448fc9e66 Fix a comment. 
llvm-svn: 40446
 2007-07-23 21:51:37 +00:00
Owen Anderson
bd3360e856 Add FastDLE, the load-elimination counterpart of FastDSE. 
llvm-svn: 40445
 2007-07-23 21:48:08 +00:00
Devang Patel
9166ad7658 Make LCSSA a loop pass. 
llvm-svn: 39844
 2007-07-13 23:57:11 +00:00
Tanya Lattner
a715bbe152 Adding ability to demote phi to stack. 
llvm-svn: 39744
 2007-07-11 18:41:34 +00:00
Owen Anderson
1eaba31f12 Add FastDSE, a new algorithm for doing dead store elimination. This algorithm is not as accurate 
as the current DSE, but it only a linear scan over each block, rather than quadratic.  Eventually
(once it has been improved somewhat), this will replace the current DSE.

NOTE: This has not yet been extensively tested.
llvm-svn: 38517
 2007-07-11 00:46:18 +00:00
Devang Patel
65f3717db9 Expose struct size threhold to allow users to tweak their own setting. 
llvm-svn: 38472
 2007-07-09 21:19:23 +00:00
Devang Patel
d9043c7501 Add SplitEdge and SplitBlock utility routines. 
llvm-svn: 37952
 2007-07-06 21:39:20 +00:00
Tanya Lattner
6d152cd7df Move inliner pass header file. 
llvm-svn: 37664
 2007-06-19 22:29:02 +00:00
Devang Patel
b5554f450a Do not preserve ETForest. 
llvm-svn: 37506
 2007-06-08 00:02:08 +00:00
Devang Patel
3daf3625ab Do not use ETForest as well as DomiantorTree. DominatorTree is sufficient. 
llvm-svn: 37501
 2007-06-07 22:17:16 +00:00
Devang Patel
a466c96f77 Use DominatorTree instead of ETForest. 
This allows faster immediate domiantor walk.

llvm-svn: 37500
 2007-06-07 21:57:03 +00:00
Devang Patel
59091c81b6 Rename. 
llvm-svn: 37448
 2007-06-06 00:49:02 +00:00
Devang Patel
61661c6774 Avoid non-trivial loop unswitching while optimizing for size. 
llvm-svn: 37446
 2007-06-06 00:21:03 +00:00