When joining two intervals where the RHS is really simple, use a light-weight
method for joining the live ranges instead of the fully-general one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30049 91177308-0d34-0410-b5e6-96231b3b80d8

new method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30048 91177308-0d34-0410-b5e6-96231b3b80d8

Another "cyclic DAG" test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30043 91177308-0d34-0410-b5e6-96231b3b80d8

Oops. Bad typo. Without the check of N1.hasOneUse() bad things can happen.
Suppose the TokenFactor can reach the Op:

       [Load chain]
           ^
           |
         [Load]
         ^    ^
         |    |
        /      \-
       /         |
      /          [Op]
     /          ^ ^
     |        ..  |
     |       /    |
   [TokenFactor]  |
       ^          |
       |          |
        \        /
         \      /
         [Store]

If we move the Load below the TokenFactor, we would have created a cycle in
the DAG.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30040 91177308-0d34-0410-b5e6-96231b3b80d8

Use a couple of multiclass patterns to factor some integer ops.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30039 91177308-0d34-0410-b5e6-96231b3b80d8

remove a bunch of comments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30038 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure to clear CurDefmPrefix = 0, otherwise stuff after a defm won't
parse right.  This fixes TableGen/MultiClass.td

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30037 91177308-0d34-0410-b5e6-96231b3b80d8

Make this harder

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30036 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a typo Jim pointed out, thanks!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30035 91177308-0d34-0410-b5e6-96231b3b80d8

fix an assertion with multidefs.  Def inside of multiclasses don't need to
be complete.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30034 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed formatting problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30033 91177308-0d34-0410-b5e6-96231b3b80d8

document !strconcat

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30032 91177308-0d34-0410-b5e6-96231b3b80d8

Added documentation Fernando Magno Quintao Pereira wrote for the register
allocator. (First draft)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30031 91177308-0d34-0410-b5e6-96231b3b80d8

Document multiclasses and defm's

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30030 91177308-0d34-0410-b5e6-96231b3b80d8

regenerate

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30029 91177308-0d34-0410-b5e6-96231b3b80d8

simple multiclass example

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30028 91177308-0d34-0410-b5e6-96231b3b80d8

Add often-requested support for defining "multiclasses" which can be instantiated.

This allows you to define multiple definitions with one line, encouraging
more .td file factoring.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30027 91177308-0d34-0410-b5e6-96231b3b80d8

- Fixed broken Win32 build
- Removed warning about clobbered parameter in Bytecode/Reader

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30026 91177308-0d34-0410-b5e6-96231b3b80d8

Remove extra spaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30025 91177308-0d34-0410-b5e6-96231b3b80d8

Last check-in was a mistake...

I've been told apple gcc version number is not guaranteed to increase
monotonically. Change the preprocess condition to make it less risky.

The configuration change is done during the middle 10.4 life cycle so we have
to check __APPLE_CC. For future OS X release, we should be able to assume
-fenable-cxa-atexit is the default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30024 91177308-0d34-0410-b5e6-96231b3b80d8

*** empty log message ***

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30023 91177308-0d34-0410-b5e6-96231b3b80d8

Allow legalizer to expand ISD::MUL using only MULHS in the rare case that is
possible and the target only supports MULHS.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30022 91177308-0d34-0410-b5e6-96231b3b80d8

Corrections.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30021 91177308-0d34-0410-b5e6-96231b3b80d8

Better comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30017 91177308-0d34-0410-b5e6-96231b3b80d8

Yikes. This requires checking apple gcc version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30016 91177308-0d34-0410-b5e6-96231b3b80d8

Pull some code out of a hot recursive function because the common case doesn't
need recursion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30015 91177308-0d34-0410-b5e6-96231b3b80d8

remove some particularly expensive assertions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30014 91177308-0d34-0410-b5e6-96231b3b80d8

Reserve space in the ValueNumberInfo vector.  This speeds up live interval
analysis 16% on crafty.

Wrap long lines.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30012 91177308-0d34-0410-b5e6-96231b3b80d8

add a simple reserve method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30011 91177308-0d34-0410-b5e6-96231b3b80d8

Iterative coallescing doesn't buy us anything (we get identical results on
crafty with and without it).  Removing it speeds up live intervals 6%.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30010 91177308-0d34-0410-b5e6-96231b3b80d8

Don't confuse canonicalize and lookup. Fixes predsimplify.reg4.ll. Also
corrects missing optimization opportunity removing cases from a switch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30009 91177308-0d34-0410-b5e6-96231b3b80d8

DAG combiner fix for rotates. Previously the outer-most condition checks
for ROTL availability. This prevents it from forming ROTR for targets that
has ROTR only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29997 91177308-0d34-0410-b5e6-96231b3b80d8

Add a special case that speeds up coallescing a bit, but not enough.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29996 91177308-0d34-0410-b5e6-96231b3b80d8

Delete copies as they are coallesced instead of waiting until the end.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29995 91177308-0d34-0410-b5e6-96231b3b80d8

avoid calling the virtual isMoveInstr method endlessly by caching its results.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29994 91177308-0d34-0410-b5e6-96231b3b80d8

Add a note about C++ -> C with libstdc++

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29993 91177308-0d34-0410-b5e6-96231b3b80d8

This program crashes the PredicateSimplifier. Not marked XFAIL because
the PredicateSimplifier is skipped in make check anyways.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29992 91177308-0d34-0410-b5e6-96231b3b80d8

Properties where both Values weren't in the union (as being equal to
another Value) weren't being found by findProperties.

This fixes predsimplify.ll test6, a missed optimization opportunity.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29991 91177308-0d34-0410-b5e6-96231b3b80d8

Bugfix for recent coallescer crash

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29990 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a compiler crash bootstrapping llvm-gcc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29989 91177308-0d34-0410-b5e6-96231b3b80d8

Restore source-level compatibility with clients of these functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29978 91177308-0d34-0410-b5e6-96231b3b80d8

Guess what happens when asserts are disabled.  :(

Also, the assert could never fire due to || instead of &&.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29977 91177308-0d34-0410-b5e6-96231b3b80d8

fix 80 column issue

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29972 91177308-0d34-0410-b5e6-96231b3b80d8

Instantiate Statistic<> in one place, not in every .o file that uses it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29971 91177308-0d34-0410-b5e6-96231b3b80d8

Move to using the EquivalenceClass ADT. Removes SynSets.
If a branch's condition has become a ConstantBool, simplify it immediately.
Removing the edge saves work and exposes up more optimization opportunities
in the pass.
Add support for SelectInst.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29970 91177308-0d34-0410-b5e6-96231b3b80d8

Code cleanups, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29969 91177308-0d34-0410-b5e6-96231b3b80d8

Teach the coallescer to coallesce live intervals joined by an arbitrary
number of copies, potentially defining live ranges that appear to have
differing value numbers that become identical when coallsced.  Among other
things, this fixes CodeGen/X86/shift-coalesce.ll and PR687.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29968 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for pr687

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29967 91177308-0d34-0410-b5e6-96231b3b80d8

Do not rely on std::sort and std::erase to get list of unique
exit blocks. The output is dependent on addresses of basic block.

Add and use Loop::getUniqueExitBlocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29966 91177308-0d34-0410-b5e6-96231b3b80d8

Minor asm fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29965 91177308-0d34-0410-b5e6-96231b3b80d8

This is also a 32-bit only test. x86-64 would pass fp parameters through XMM registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29964 91177308-0d34-0410-b5e6-96231b3b80d8

Fix test case so it passes on x86-64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29963 91177308-0d34-0410-b5e6-96231b3b80d8

Remove dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29962 91177308-0d34-0410-b5e6-96231b3b80d8

Delete a no-longer-supported configuration item.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29960 91177308-0d34-0410-b5e6-96231b3b80d8

Undo xfail.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29958 91177308-0d34-0410-b5e6-96231b3b80d8

Don't performance load/op/store transformation if op produces a floating point
or vector result. X86 does not have load/mod/store variants of those
instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29957 91177308-0d34-0410-b5e6-96231b3b80d8

- Enable x86 isel preprocessing by default unless -fast is specified.
- Also disable isel load folding if -fast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29956 91177308-0d34-0410-b5e6-96231b3b80d8

Issue cvs co with -P option to prune empty directories. Remove the unnecessary
update stage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29955 91177308-0d34-0410-b5e6-96231b3b80d8

Handle callee saved registers in dwarf frame info (lead up to exception
handling.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29954 91177308-0d34-0410-b5e6-96231b3b80d8

Tidy up options.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29953 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid making unneeded load/mod/store transformation which can hurt performance.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29952 91177308-0d34-0410-b5e6-96231b3b80d8

Move isCommutativeBinOp from SelectionDAG.cpp and DAGCombiner.cpp out. Make it a static method of SelectionDAG.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29951 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up a bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29950 91177308-0d34-0410-b5e6-96231b3b80d8

Make ppc64 jit kinda work right.  About 2/3 of Olden passes with this,
there are clearly some encoding bugs lurking in there somewhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29949 91177308-0d34-0410-b5e6-96231b3b80d8

The list is sorted by name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29948 91177308-0d34-0410-b5e6-96231b3b80d8

Add PredicateSimplifier pass. Collapses equal variables into one form
and simplifies expressions. This implements the optimization described
in PR807.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29947 91177308-0d34-0410-b5e6-96231b3b80d8

On Mac, print jump table entries after the function to work around a linker issue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29946 91177308-0d34-0410-b5e6-96231b3b80d8

Add 2nd form of resize

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29945 91177308-0d34-0410-b5e6-96231b3b80d8

Add an optional pass to preprocess the DAG before x86 isel to allow selecting more load/mod/store instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29943 91177308-0d34-0410-b5e6-96231b3b80d8

Add a --disable-compression option like llvm-link/llvm-as etc have

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29941 91177308-0d34-0410-b5e6-96231b3b80d8

remove extraneous space

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29940 91177308-0d34-0410-b5e6-96231b3b80d8

Spell naively with the i-Umlaut...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29939 91177308-0d34-0410-b5e6-96231b3b80d8

Messed up and put a "To be written" in a section that was written.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29938 91177308-0d34-0410-b5e6-96231b3b80d8

Added some preliminary text to the TargetJITInfo class section.
Fixed some inconsistencies with format. Corrected some of the text.
Put code inside of "code" div tags.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29937 91177308-0d34-0410-b5e6-96231b3b80d8

Make LoopUnroll fold excessive BasicBlocks.  This results in a significant speedup of
gccas on 252.eon

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29936 91177308-0d34-0410-b5e6-96231b3b80d8

Back out last revision which should not have been committed (yet).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29935 91177308-0d34-0410-b5e6-96231b3b80d8

For PR387:
Close out this long standing bug by removing the remaining overloaded
virtual functions in LLVM. The -Woverloaded-virtual option is now turned on.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29934 91177308-0d34-0410-b5e6-96231b3b80d8

Update to match changes in RegisterAnalysisGroup usage

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29933 91177308-0d34-0410-b5e6-96231b3b80d8

simplify AnalysisGroup registration, eliminating one typeid call.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29932 91177308-0d34-0410-b5e6-96231b3b80d8

Excise references to the now defunct "analyze" tool. Merge descriptions
where appropriate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29931 91177308-0d34-0410-b5e6-96231b3b80d8

Add virtual methods to all subclasses so they are not overloaded.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29930 91177308-0d34-0410-b5e6-96231b3b80d8

Silence -Woverloaded-virtual warnings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29929 91177308-0d34-0410-b5e6-96231b3b80d8

update doc: analyze is gone and passes should just use RegisterPass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29928 91177308-0d34-0410-b5e6-96231b3b80d8

Update tests now that opt no longer reads .ll files

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29927 91177308-0d34-0410-b5e6-96231b3b80d8

Adjust tests now that opt doesn't read .ll files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29926 91177308-0d34-0410-b5e6-96231b3b80d8

eliminate RegisterOpt.  It does the same thing as RegisterPass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29925 91177308-0d34-0410-b5e6-96231b3b80d8

opt no longer reads .ll files.  Run llvm-as explicitly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29924 91177308-0d34-0410-b5e6-96231b3b80d8

-analyze mode shouldn't output a .bc file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29923 91177308-0d34-0410-b5e6-96231b3b80d8

Fit to 80 cols

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29922 91177308-0d34-0410-b5e6-96231b3b80d8

Eliminate RegisterAnalysis.  RegisterPass now does all that is necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29921 91177308-0d34-0410-b5e6-96231b3b80d8

We no longer care whether something is an opt vs analysis pass, only whether
something is a pass vs an analysis group now.  Simplify interfaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29920 91177308-0d34-0410-b5e6-96231b3b80d8

analyze no longer exists, don't offer to run it :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29919 91177308-0d34-0410-b5e6-96231b3b80d8

Remove a dead class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29918 91177308-0d34-0410-b5e6-96231b3b80d8

Minor code cleanups

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29917 91177308-0d34-0410-b5e6-96231b3b80d8

eliminate only use of FilteredPassNameParser

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29916 91177308-0d34-0410-b5e6-96231b3b80d8

Merge the 'analyze' mode code with the 'opt' mode code.  Eliminate the
'autodetect .ll files' functionality.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29915 91177308-0d34-0410-b5e6-96231b3b80d8

Move this test from Codegen/PowerPC to CodeGen/Generic.  It fails on ia64,
but that's not the ppc backend's fault.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29914 91177308-0d34-0410-b5e6-96231b3b80d8

Use compiler.h instead of hand rolling our own macro

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29913 91177308-0d34-0410-b5e6-96231b3b80d8

add directive to disable inlining

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29912 91177308-0d34-0410-b5e6-96231b3b80d8

s|llvm/Support/Visibility.h|llvm/Support/Compiler.h|

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29911 91177308-0d34-0410-b5e6-96231b3b80d8