Changes to support PHINode::removeIncoming changes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4079 91177308-0d34-0410-b5e6-96231b3b80d8

  - Change PHINode::removeIncomingValue to delete the phi node if the last
    incoming value is removed!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4078 91177308-0d34-0410-b5e6-96231b3b80d8

  - Checkin LARGE number of Changes to CEE pass that will make it much more
    powerful, but that are largely disabled.  The basic idea here is that it
    is trying to forward branches across basic blocks that have PHI nodes in
    it, which are crucial to be able to handle cases like whet.ll.
    Unfortunately we are not updating SSA correctly, causing sim.c to die, and I
    don't have time to fix the regression now, so I must disable the
    functionality.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4077 91177308-0d34-0410-b5e6-96231b3b80d8

By default PHINode::removeIncomingValue will delete the phi node if the last
incoming value is deleted!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4076 91177308-0d34-0410-b5e6-96231b3b80d8

Expose isCriticalEdge & SplitCriticalEdge methods from crit-edges pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4075 91177308-0d34-0410-b5e6-96231b3b80d8

Expose new "recalculate" method from dominatorset

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4074 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4073 91177308-0d34-0410-b5e6-96231b3b80d8

Make test more interesting by adding dummy phi node

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4072 91177308-0d34-0410-b5e6-96231b3b80d8

It is illegal for PHI nodes to have zero values, delete the code to handle them

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4071 91177308-0d34-0410-b5e6-96231b3b80d8

Fold ashr -1, X into -1

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4070 91177308-0d34-0410-b5e6-96231b3b80d8

Add new testcase for arithmetic shr of -1

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4069 91177308-0d34-0410-b5e6-96231b3b80d8

This test was mistakenly matching 'predecessors' that the new asmwriter
spits out

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4068 91177308-0d34-0410-b5e6-96231b3b80d8

LLVM syntax highlighting for VIM.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4067 91177308-0d34-0410-b5e6-96231b3b80d8

Don't rotate paper.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4066 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4065 91177308-0d34-0410-b5e6-96231b3b80d8

Fix testcase to run correctly, add description

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4064 91177308-0d34-0410-b5e6-96231b3b80d8

Finally I'm able to distill a testcase for a problem I'm seeing!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4063 91177308-0d34-0410-b5e6-96231b3b80d8

  - Implement a new -print-cfg option for analyze, that causes it to print the
    CFG of each function in the module to 'dot' files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4062 91177308-0d34-0410-b5e6-96231b3b80d8

  - Allow printing generic LLVM graphs to 'dot' files, so they can be
    visualized easily.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4061 91177308-0d34-0410-b5e6-96231b3b80d8

Non-functionality change just to make it more clear what is going on

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4060 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid making external global variables internal

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4059 91177308-0d34-0410-b5e6-96231b3b80d8

Fix bug in last checkin

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4058 91177308-0d34-0410-b5e6-96231b3b80d8

Update testcase to be legal llvm

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4057 91177308-0d34-0410-b5e6-96231b3b80d8

Remove really old testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4056 91177308-0d34-0410-b5e6-96231b3b80d8

Implement operator= for SuccIterators

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4055 91177308-0d34-0410-b5e6-96231b3b80d8

Checkin new "feature" test for cee

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4054 91177308-0d34-0410-b5e6-96231b3b80d8

NEw "feature" test that cee should eventually handle

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4053 91177308-0d34-0410-b5e6-96231b3b80d8

Global variables are now external if they don't have initializers, not
"uninitialized"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4052 91177308-0d34-0410-b5e6-96231b3b80d8

Check that we don't have external varaibles with internal linkage

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4051 91177308-0d34-0410-b5e6-96231b3b80d8

The parser now accepts "external" global variables, in addition to the backwards
compatible "uninitialized" global variables

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4050 91177308-0d34-0410-b5e6-96231b3b80d8

  - Cleaned up all of the test/Feature tests to not use uint's with
    getelementptr instructions and not to add pointers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4049 91177308-0d34-0410-b5e6-96231b3b80d8

Remove old crusty test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4048 91177308-0d34-0410-b5e6-96231b3b80d8

Test "external" modifier on global variable
Fix getelementptr instruction to use long isntead of uint index

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4047 91177308-0d34-0410-b5e6-96231b3b80d8

  - Add new isExternal() method to GlobalVariable to mirror Function.
  - doxygenize comments and add new comments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4046 91177308-0d34-0410-b5e6-96231b3b80d8

  - The extract tool now is sure to extract the function implementation for
    the specified name instead of extracting the prototype if both exist.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4045 91177308-0d34-0410-b5e6-96231b3b80d8

PHI nodes are not allowed to exist with zero incoming values, check that
there aren't any like this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4044 91177308-0d34-0410-b5e6-96231b3b80d8

Bug fix: In preventing static global variables from being printed twice,
I also prevented external globals from being printed twice, but they
should (extern declaration and definition).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4043 91177308-0d34-0410-b5e6-96231b3b80d8

Added #include<unistd.h> to compile with solaris gcc3.2

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4042 91177308-0d34-0410-b5e6-96231b3b80d8

added cast to unsigned to compile with gcc3.2 (sparc)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4041 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase for bug never checked into CVS, but that I hit during debugging a
new feature

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4039 91177308-0d34-0410-b5e6-96231b3b80d8

Handle post dominance correctly in the case where blocks do not have a path to
the exit node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4038 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a nasty problem with dominance calculation for unreachable blocks.
If we had a CFG that look like Entry -> B, Unreachable -> B, then we would
not correctly determine that Entry dominated B, because Entry did not
apparently dominate "unreachable".  This patch fixes this by making the entry
node dominate all blocks, including unreachable ones.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4037 91177308-0d34-0410-b5e6-96231b3b80d8

Prune function nodes that are no longer referenced due to inlining

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4036 91177308-0d34-0410-b5e6-96231b3b80d8

sgefa uses truely huge data structures nodes.  Only print part of them if they
are so big

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4035 91177308-0d34-0410-b5e6-96231b3b80d8

The wall clock timer (implementing using the RTC or cycle counter on x86) is
so much more accurate than the per process timers that we get better results
(less noise) by sorting according to wall time than process time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4034 91177308-0d34-0410-b5e6-96231b3b80d8

Handle bug exposed by power benchmark

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4033 91177308-0d34-0410-b5e6-96231b3b80d8

Add parens around constant calls to getelemptr to properly associate the reference

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4032 91177308-0d34-0410-b5e6-96231b3b80d8

Reimplement/port the Bottom Up Closure pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4031 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4030 91177308-0d34-0410-b5e6-96231b3b80d8

DataStructure.h doesn't include DSGraph.h

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4029 91177308-0d34-0410-b5e6-96231b3b80d8

Remove commented out stuff
DataStructure.h doesn't include DSGraph.h now

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4028 91177308-0d34-0410-b5e6-96231b3b80d8

Move GlobalDSGraph class defn to the end of the file

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4027 91177308-0d34-0410-b5e6-96231b3b80d8

This file doesn't need Pass.h

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4026 91177308-0d34-0410-b5e6-96231b3b80d8

I was wrong on the removing of those references on the last commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4023 91177308-0d34-0410-b5e6-96231b3b80d8

* Implement the getc() function
* Support usage of stdin, stdout & stderr correctly in LLI!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4022 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup #includes, expose module

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4021 91177308-0d34-0410-b5e6-96231b3b80d8

Expose TD to ExternalFunctions.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4020 91177308-0d34-0410-b5e6-96231b3b80d8

  - Print the predecessors of a basic block instead of the number of uses of
    the block in the AsmWriter

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4019 91177308-0d34-0410-b5e6-96231b3b80d8

Fix bug: 2002-10-02-SignExtensionProblem.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4017 91177308-0d34-0410-b5e6-96231b3b80d8

Removed unneeded reference and dereferences.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4016 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase for a problem discovered in the SPECINT gzip benchmark.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4015 91177308-0d34-0410-b5e6-96231b3b80d8

Cleaned up my last check-in.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4014 91177308-0d34-0410-b5e6-96231b3b80d8

No longer include malloc.h.  If protoypes are needed for memory functions they will be present in the byte code and the generated c as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4013 91177308-0d34-0410-b5e6-96231b3b80d8

* Implement fully general merging of array subscripts on demand!  This
      does not handle the initial pointer index case yet though.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4012 91177308-0d34-0410-b5e6-96231b3b80d8

* Implement fully general merging of array subscripts on demand!  This
      does not handle the initial pointer index case yet though.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4011 91177308-0d34-0410-b5e6-96231b3b80d8

When printing DS nodes, print the mergemap index as well to allow easier
debugging of merging process.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4010 91177308-0d34-0410-b5e6-96231b3b80d8

Checkin the "meat" of the Data structure graph itself.  I forgot to check
this in before.  :(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4009 91177308-0d34-0410-b5e6-96231b3b80d8

* Significant rework of DSNode to support arbitrary aliasing due to merging
* Now all and any bytes of a DSNode can be merged together individually.  This
  is neccesary to support the full generality of C and support aliasing
  correctly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4008 91177308-0d34-0410-b5e6-96231b3b80d8

  - Remove the User::eraseOperand method which is never used, really
    dangerous, and not something we want to expose.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4007 91177308-0d34-0410-b5e6-96231b3b80d8

Do some cleanups to the Type and Constant section to remove latex stuff

There is still a lot of cleanup and fleshing out required here, but at least
it gets rid of the flagrantly bad parts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4006 91177308-0d34-0410-b5e6-96231b3b80d8

Temporary change to make datastructure stuff link in right

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4005 91177308-0d34-0410-b5e6-96231b3b80d8

Changes to work with Statistics rework
    * Renamed StatisticReporter.h/cpp to Statistic.h/cpp
    * Broke constructor to take two const char * arguments instead of one, so
      that indendation can be taken care of automatically.
    * Sort the list by pass name when printing
    * Make sure to print all statistics as a group, instead of randomly when
      the statistics dtors are called.
    * Updated ProgrammersManual with new semantics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4004 91177308-0d34-0410-b5e6-96231b3b80d8

Update manual to reflect recent changes in the Statistic class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4003 91177308-0d34-0410-b5e6-96231b3b80d8

Updates to work with recent Statistic's changes:

    * Renamed StatisticReporter.h/cpp to Statistic.h/cpp
    * Broke constructor to take two const char * arguments instead of one, so
      that indendation can be taken care of automatically.
    * Sort the list by pass name when printing
    * Make sure to print all statistics as a group, instead of randomly when
      the statistics dtors are called.
    * Updated ProgrammersManual with new semantics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4002 91177308-0d34-0410-b5e6-96231b3b80d8

Updates to work with recent Statistic's changes:
    * Renamed StatisticReporter.h/cpp to Statistic.h/cpp
    * Broke constructor to take two const char * arguments instead of one, so
      that indendation can be taken care of automatically.
    * Sort the list by pass name when printing
    * Make sure to print all statistics as a group, instead of randomly when
      the statistics dtors are called.
    * Updated ProgrammersManual with new semantics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4001 91177308-0d34-0410-b5e6-96231b3b80d8

Build subdirs in parallel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4000 91177308-0d34-0410-b5e6-96231b3b80d8

  - Rework Statistics:
    * Renamed StatisticReporter.h/cpp to Statistic.h/cpp
    * Broke constructor to take two const char * arguments instead of one, so
      that indendation can be taken care of automatically.
    * Sort the list by pass name when printing
    * Make sure to print all statistics as a group, instead of randomly when
      the statistics dtors are called.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3999 91177308-0d34-0410-b5e6-96231b3b80d8

Check in DataStructure rewrite so far.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3998 91177308-0d34-0410-b5e6-96231b3b80d8

Initial checkin of Steensgaards context insensitive flow insensitive
alias analysis

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3997 91177308-0d34-0410-b5e6-96231b3b80d8

Checkin some major reworks of data structure analysis.  This is not done,
nor does it work very well, but I need to get it checked in before I break
the tree unintentionally.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3996 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure to use the TimerGroup that we created!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3995 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure not to count the PassManager wrapers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3994 91177308-0d34-0410-b5e6-96231b3b80d8

Factor timer code out of PassManager implementation, into a generic interface
exposed by Support/Timer.h.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3993 91177308-0d34-0410-b5e6-96231b3b80d8

Checkin generic interval timer support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3992 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed to properly escape quotes in strings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3991 91177308-0d34-0410-b5e6-96231b3b80d8

Allow production of -stats output for benchmarks by specifying
ENABLE_STATS=1 on the make command line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3989 91177308-0d34-0410-b5e6-96231b3b80d8

Allow production of -stats output for benchmarks by specifying
ENABLE_STATS=1 on the make command line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3988 91177308-0d34-0410-b5e6-96231b3b80d8

On this code, llc did not pass the sixth argument (%reg321) to printf.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3986 91177308-0d34-0410-b5e6-96231b3b80d8

Minor tweak

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3985 91177308-0d34-0410-b5e6-96231b3b80d8

Enable buidling of programs on Linux again

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3984 91177308-0d34-0410-b5e6-96231b3b80d8

Added several more helper functions for construction MachineInstrs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3983 91177308-0d34-0410-b5e6-96231b3b80d8

Bug fix in folding getElementPtr instructions: don't fold one into
a predecessor if it has a non-zero first index and the predecessor
ends with a struct index.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3982 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a problem that was caused by stale analyses being in CurrentAnalyses

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3981 91177308-0d34-0410-b5e6-96231b3b80d8

Fix bug in LICM that caused the previous big win. :(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3980 91177308-0d34-0410-b5e6-96231b3b80d8

Minor change to interface for Create{Zero,Sign}ExtensionsInstructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3979 91177308-0d34-0410-b5e6-96231b3b80d8

Hoist the contents of Loops in depth first order in the dominator tree,
rather than in random order.  This causes LICM to be DRAMATICALLY more
effective. For example, on bzip2.c, it is able to hoist 302 loads and
2380 total instructions, as opposed to 44/338 before.  This  obviously
makes other transformations much more powerful as well!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3978 91177308-0d34-0410-b5e6-96231b3b80d8

Fix printing of loop information

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3977 91177308-0d34-0410-b5e6-96231b3b80d8

Improve printing of dominator sets

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3976 91177308-0d34-0410-b5e6-96231b3b80d8

Fix major bugs in dominator set & tree information updating

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3975 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify code a bit, add an assertion

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3974 91177308-0d34-0410-b5e6-96231b3b80d8