Fix the last remaining bug preventing us from switching the X86 BE over
from the simple isel to the pattern isel.  This forces inserted libcalls
to serialize against other function calls, which was breaking
UnitTests/2005-05-12-Int64ToFP.  Hopefully this will fix issues on other
targets as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21872 91177308-0d34-0410-b5e6-96231b3b80d8

Do not memoize ADJCALLSTACKDOWN nodes, provide a method to hack on them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21871 91177308-0d34-0410-b5e6-96231b3b80d8

wrap long line

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21870 91177308-0d34-0410-b5e6-96231b3b80d8

new method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21869 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure to legalize generated ctpop nodes, convert tabs to spaces

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21868 91177308-0d34-0410-b5e6-96231b3b80d8

Legalize for CTLZ generates a ctpop, but this ctpop is not expanded.
This is bad.  It is generated if you are ctlz a type that is not
legal for the arch (aka ctlz of bytes on alpha legalize fine).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21867 91177308-0d34-0410-b5e6-96231b3b80d8

expand count-leading/trailing-zeros; the test 2005-05-11-Popcount-ffs-fls.c
should now pass (the "LLVM" and "REF" results should be identical)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21866 91177308-0d34-0410-b5e6-96231b3b80d8

include the other bit count intrinsics

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21863 91177308-0d34-0410-b5e6-96231b3b80d8

Add some notes for expanding clz/ctz

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21862 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify this code, use the proper shift amount

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21861 91177308-0d34-0410-b5e6-96231b3b80d8

add the popcount instruction and support this in the isel

the primary user of this will probably end up being find-first-set-bit/find-
last-set-bit, which i'll get around to...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21860 91177308-0d34-0410-b5e6-96231b3b80d8

Legalize this correctly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21859 91177308-0d34-0410-b5e6-96231b3b80d8

No really IA*64* :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21858 91177308-0d34-0410-b5e6-96231b3b80d8

X86 has more than just 32-bit registers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21857 91177308-0d34-0410-b5e6-96231b3b80d8

implement expansion of ctpop nodes, implementing CodeGen/Generic/llvm-ct-intrinsics.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21856 91177308-0d34-0410-b5e6-96231b3b80d8

Print bit count nodes correctly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21855 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21854 91177308-0d34-0410-b5e6-96231b3b80d8

update this to reflect the new selection daggy world

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21853 91177308-0d34-0410-b5e6-96231b3b80d8

don't duplicate information, particularly when it's out of date!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21852 91177308-0d34-0410-b5e6-96231b3b80d8

Do not use "" as a sentinal for a missing argument!  This fixes PR560.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21850 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR562

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21849 91177308-0d34-0410-b5e6-96231b3b80d8

Remove vim modeline; this should go into ~/.vimrc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21848 91177308-0d34-0410-b5e6-96231b3b80d8

Remove vim modeline, this belongs in ~/.vimrc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21847 91177308-0d34-0410-b5e6-96231b3b80d8

Consistently surround `cl::' code structures with <b> and <tt> to make them
stand out as code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21846 91177308-0d34-0410-b5e6-96231b3b80d8

Why output multiple strings, let the compiler concatenate them for us for free

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21845 91177308-0d34-0410-b5e6-96231b3b80d8

* Convert tabs to spaces, fix code alignment
* Remove trailing whitespace
* Wrap long lines

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21844 91177308-0d34-0410-b5e6-96231b3b80d8

note HP-UX support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21841 91177308-0d34-0410-b5e6-96231b3b80d8

Convert feature of the simple isel over for the pattern isel to use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21840 91177308-0d34-0410-b5e6-96231b3b80d8

Fix Reassociate/shifttest.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21839 91177308-0d34-0410-b5e6-96231b3b80d8

Silence some VC++ warnings

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21838 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21837 91177308-0d34-0410-b5e6-96231b3b80d8

If a function contains no allocas, all of the calls in it are trivially
suitable for tail calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21836 91177308-0d34-0410-b5e6-96231b3b80d8

The semantics of cast X to bool are a comparison against zero, not a truncation!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21833 91177308-0d34-0410-b5e6-96231b3b80d8

testcase I've had in my tree

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21832 91177308-0d34-0410-b5e6-96231b3b80d8

Implement READPORT/WRITEPORT, implementing the last X86 regression tests
that were failing with the pattern selector.  Note that the support that
existed in the simple selector was clearly broken in several ways though
(which has also been fixed).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21831 91177308-0d34-0410-b5e6-96231b3b80d8

do not emit illegal instructions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21830 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the syntax of the i/o instructions, these are obviously unused.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21829 91177308-0d34-0410-b5e6-96231b3b80d8

legalize readio/writeio into load/stores, fixing CodeGen/X86/io.llx with
the pattern isel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21828 91177308-0d34-0410-b5e6-96231b3b80d8

legalize readio/writeio into a load/store if requested

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21827 91177308-0d34-0410-b5e6-96231b3b80d8

legalize READPORT, WRITEPORT, READIO, WRITEIO, at least in the basic cases
where they are directly supported by the architecture.  Wrap a bunch of
long lines :(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21826 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for matching the READPORT, WRITEPORT, READIO, WRITEIO intrinsics

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21825 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for READPORT, WRITEPORT, READIO, WRITEIO

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21824 91177308-0d34-0410-b5e6-96231b3b80d8

Add READPORT, WRITEPORT, READIO, WRITEIO nodes, wrap long lines

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21823 91177308-0d34-0410-b5e6-96231b3b80d8

Tell tblgen exactly where to find the include file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21822 91177308-0d34-0410-b5e6-96231b3b80d8

restore some non-dead code I removed last night breaking double casts to
uint

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21821 91177308-0d34-0410-b5e6-96231b3b80d8

fold and (shl X, C1), C2 -> rlwinm when possible.  Many other cases are possible,
include and (srl)    and the inverses (shl and) etc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21820 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21819 91177308-0d34-0410-b5e6-96231b3b80d8

Fold shifts into subsequent SHL's.  These shifts often arise due to addrses
arithmetic lowering.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21818 91177308-0d34-0410-b5e6-96231b3b80d8

Updated the list of code generators for LLVM 1.5.
Added information on getting LLVM 1.5 from CVS (hopefully readers will
understand that the label will work *after* LLVM 1.5 is released).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21817 91177308-0d34-0410-b5e6-96231b3b80d8

Little corrections.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21816 91177308-0d34-0410-b5e6-96231b3b80d8

Fix bug noticed by Tzu-Chien Chiu, thanks!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21815 91177308-0d34-0410-b5e6-96231b3b80d8

fix and cleanup constmul code a bit, this fixes mediabench/toast and
probably a couple of other tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21814 91177308-0d34-0410-b5e6-96231b3b80d8

tweak test to accept the (good) code emitted by the pattern isel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21812 91177308-0d34-0410-b5e6-96231b3b80d8

Wrap long lines, remove dead code that is now handled by legalize

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21811 91177308-0d34-0410-b5e6-96231b3b80d8

Fix FP -> bool casts

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21810 91177308-0d34-0410-b5e6-96231b3b80d8

implement and.ll:test33

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21809 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21808 91177308-0d34-0410-b5e6-96231b3b80d8

Add note to self to complete the testing of all intrinsic functions as
specified in the LangRef document.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21807 91177308-0d34-0410-b5e6-96231b3b80d8

Don't use the load/store instruction as the source pointer, use the pointer
being stored/loaded through!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21806 91177308-0d34-0410-b5e6-96231b3b80d8

memoize all nodes, even null Value* nodes.  Do not add two token chain outputs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21805 91177308-0d34-0410-b5e6-96231b3b80d8

wrap long lines

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21804 91177308-0d34-0410-b5e6-96231b3b80d8

Print SrcValue nodes correctly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21803 91177308-0d34-0410-b5e6-96231b3b80d8

Fix X86/2005-05-08-FPStackifierPHI.ll: ugly gross hack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21801 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase that crashes the pattern isel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21800 91177308-0d34-0410-b5e6-96231b3b80d8

Preserve CC's when linking modules

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21799 91177308-0d34-0410-b5e6-96231b3b80d8

Preserve calling conventions when doing IPO

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21798 91177308-0d34-0410-b5e6-96231b3b80d8

wrap long lines, preserve calling conventions when cloning functions and
turning calls into invokes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21797 91177308-0d34-0410-b5e6-96231b3b80d8

By definition, 'tail' calls cannot access the stack frame of their caller.
Expose this as a simple form of mod/ref information.  This implements
BasicAA/tailcall-modref.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21796 91177308-0d34-0410-b5e6-96231b3b80d8

New testacse for information exposed by the 'tail' call marker.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21795 91177308-0d34-0410-b5e6-96231b3b80d8

Verify that varargs functions all have ccc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21792 91177308-0d34-0410-b5e6-96231b3b80d8

Convert non-address taken functions with C calling conventions to fastcc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21791 91177308-0d34-0410-b5e6-96231b3b80d8

If loopextract breaks the program provide output so that we can repro the
problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21790 91177308-0d34-0410-b5e6-96231b3b80d8

add a testcase for a case we do not handle yet

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21789 91177308-0d34-0410-b5e6-96231b3b80d8

Implement Reassociate/mul-neg-add.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21788 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21787 91177308-0d34-0410-b5e6-96231b3b80d8

Bail out earlier

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21786 91177308-0d34-0410-b5e6-96231b3b80d8

Teach reassociate that 0-X === X*-1

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21785 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21784 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR557 and basictest[34].ll.

This makes reassociate realize that loads should be treated as unmovable, and
gives distinct ranks to distinct values defined in the same basic block, allowing
reassociate to do its thing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21783 91177308-0d34-0410-b5e6-96231b3b80d8

new testcases for PR557

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21782 91177308-0d34-0410-b5e6-96231b3b80d8

Add debugging information

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21781 91177308-0d34-0410-b5e6-96231b3b80d8

eliminate gotos

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21780 91177308-0d34-0410-b5e6-96231b3b80d8

Wrap long lines.  Fix "warning: conflicting types for built-in function 'memset'"
warning from the CBE+GCC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21779 91177308-0d34-0410-b5e6-96231b3b80d8

Improve reassociation handling of inverses, implementing inverses.ll.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21778 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21777 91177308-0d34-0410-b5e6-96231b3b80d8

clean up and modernize this pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21776 91177308-0d34-0410-b5e6-96231b3b80d8

Strength reduce SAR into SHR if there is no way sign bits could be shifted
in.  This tends to get cases like this:

  X = cast ubyte to int
  Y = shr int X, ...

Tested by: shift.ll:test24

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21775 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21774 91177308-0d34-0410-b5e6-96231b3b80d8

Update my info

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21773 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor some code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21772 91177308-0d34-0410-b5e6-96231b3b80d8

Handle some simple cases where we can see that values get annihilated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21771 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a miscompilation of crafty by clobbering the "A" variable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21770 91177308-0d34-0410-b5e6-96231b3b80d8

Move licm after reassociate, add some cond-propagate passes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21769 91177308-0d34-0410-b5e6-96231b3b80d8

Rewrite the guts of the reassociate pass to be more efficient and logical.  Instead
of trying to do local reassociation tweaks at each level, only process an expression
tree once (at its root).  This does not improve the reassociation pass in any real way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21768 91177308-0d34-0410-b5e6-96231b3b80d8

* Break tests into individual cases so its easier to see what's going on.
* Add four new cases to handle the new optimizations for strlen, dealing
  with:
    strlen(x) != 0 -> *x != 0
    strlen(x) == 0 -> *x == 0
  for each of two cases: strlen(x) != 0 and strlen(x) == 0

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21767 91177308-0d34-0410-b5e6-96231b3b80d8

* Add two strlen optimizations:
    strlen(x) != 0 -> *x != 0
    strlen(x) == 0 -> *x == 0
* Change nested statistics to use style of other LLVM statistics so that
  only the name of the optimization (simplify-libcalls) is used as the
  statistic name, and the description indicates which specific all is
  optimized. Cuts down on some redundancy and saves a few bytes of space.
* Make note of stpcpy optimization that could be done.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21766 91177308-0d34-0410-b5e6-96231b3b80d8

Don't increment the counter unless the debug flag is set.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21762 91177308-0d34-0410-b5e6-96231b3b80d8

Convert shifts to muls to assist reassociation.  This implements
Reassociate/shifttest.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21761 91177308-0d34-0410-b5e6-96231b3b80d8

test that reassociate can handle shifts

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21760 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify the code and rearrange it.  No major functionality changes here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21759 91177308-0d34-0410-b5e6-96231b3b80d8