1) Improve comments.
2) Don't try to insert an i64 value into the low part of a
   vector with movq on an x86-32 target.  This allows us to
   compile:

__m128i doload64(short x) {return _mm_set_epi16(0,0,0,0,0,0,0,1);}

into:

_doload64:
movaps LCPI1_0, %xmm0
ret

instead of:

_doload64:
subl $28, %esp
movl $0, 4(%esp)
movl $1, (%esp)
movq (%esp), %xmm0
addl $28, %esp
ret

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48057 91177308-0d34-0410-b5e6-96231b3b80d8

minor simplifications to this code, don't create a dead
SCALAR_TO_VECTOR on paths that end up not using it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48056 91177308-0d34-0410-b5e6-96231b3b80d8

This one looks easy, add a note.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48055 91177308-0d34-0410-b5e6-96231b3b80d8

move these to the appropriate file

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48054 91177308-0d34-0410-b5e6-96231b3b80d8

Not all users of a BB are Instructions any more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48047 91177308-0d34-0410-b5e6-96231b3b80d8

Load the symbols first so that the interpreter constructor can find them when
it tries to initialize them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48046 91177308-0d34-0410-b5e6-96231b3b80d8

much simpler test case

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48045 91177308-0d34-0410-b5e6-96231b3b80d8

Remove unused runPass methods.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48044 91177308-0d34-0410-b5e6-96231b3b80d8

More ppc32 byval handling (bug fixes).  Things
are looking pretty good now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48043 91177308-0d34-0410-b5e6-96231b3b80d8

Implement x86 support for @llvm.prefetch. It corresponds to prefetcht{0|1|2} and prefetchnta instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48042 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for calls with i128 return values on ppc64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48041 91177308-0d34-0410-b5e6-96231b3b80d8

Something that kills a super-register also
kills the sub-register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48038 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a typo. It's causing consumer-typeset to miscompile. Perhaps more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48035 91177308-0d34-0410-b5e6-96231b3b80d8

There is no killUse.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48034 91177308-0d34-0410-b5e6-96231b3b80d8

add dropped section test case for PR2123

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48033 91177308-0d34-0410-b5e6-96231b3b80d8

Add new sretpromotion pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48032 91177308-0d34-0410-b5e6-96231b3b80d8

PPC64 passes arguments of integral type in i64 registers, not i32. Reflect this
by promoting smaller integral values (i32 at this point) to i64, then truncating
to get the wanted size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48030 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for lowering 128-bit shifts on ppc64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48029 91177308-0d34-0410-b5e6-96231b3b80d8

Next bits of PPC byval handling.  Basically functional
but there are bugs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48028 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for ppc64 shifts with 7-bit (oversized) shift amount (e.g. PPCshl).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48027 91177308-0d34-0410-b5e6-96231b3b80d8

Replace SDT_PPCShiftOp in favor of SDTIntBinOps.  This allows it to work
with 32 or 64-bit operands/results.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48026 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed a register scavenger bug. If a def is re-defining part of a super register, there must be an implicit def of the super-register on the MI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48024 91177308-0d34-0410-b5e6-96231b3b80d8

only extract main if the user didn't specify anything to extract

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48023 91177308-0d34-0410-b5e6-96231b3b80d8

RetVal is not used when there are more then one return operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48022 91177308-0d34-0410-b5e6-96231b3b80d8

make error message reflect default search function name

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48021 91177308-0d34-0410-b5e6-96231b3b80d8

Update inliner to handle functions that return multiple values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48020 91177308-0d34-0410-b5e6-96231b3b80d8

fix 80 col violations

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48019 91177308-0d34-0410-b5e6-96231b3b80d8

Place for sret promotion tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48016 91177308-0d34-0410-b5e6-96231b3b80d8

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48015 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup some comments in the OCaml bindings.

Patch by Erick Tryzelaar.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48014 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a typo. 'make clean' in bindings/ocaml would leave an output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48012 91177308-0d34-0410-b5e6-96231b3b80d8

Clarify some important bits

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48010 91177308-0d34-0410-b5e6-96231b3b80d8

Small cleanup: propagate thread-localness via generic routine.
No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48009 91177308-0d34-0410-b5e6-96231b3b80d8

Regenerate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48008 91177308-0d34-0410-b5e6-96231b3b80d8

Prefer to use ocamlc.opt to ocamlc and soforth.
These natively compiled versions are faster.

Patch by Erick Tryzelaar!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48007 91177308-0d34-0410-b5e6-96231b3b80d8

mark frem as expand for all legal fp types on x86, regardless of whether
we're using SSE or not.  This fixes PR2122.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48006 91177308-0d34-0410-b5e6-96231b3b80d8

Add testcase.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48005 91177308-0d34-0410-b5e6-96231b3b80d8

When setting the "unused" info, take into account something like this:

    %r3<def> = OR %x3<kill>, %x3

We don't want to mark the %r3 as unused even though it's a sub-register of %x3.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48003 91177308-0d34-0410-b5e6-96231b3b80d8

80 col violation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47998 91177308-0d34-0410-b5e6-96231b3b80d8

some more spelling changes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47996 91177308-0d34-0410-b5e6-96231b3b80d8

fix typos

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47994 91177308-0d34-0410-b5e6-96231b3b80d8

Constant fold SIGN_EXTEND_INREG with ashr not lshr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47992 91177308-0d34-0410-b5e6-96231b3b80d8

Exercise the new CFG change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47990 91177308-0d34-0410-b5e6-96231b3b80d8

Treat BBs that use BBs as proper predecessors and successors in the CFG.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47989 91177308-0d34-0410-b5e6-96231b3b80d8

Commit the testcase too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47988 91177308-0d34-0410-b5e6-96231b3b80d8

Don't try to simplify urem and srem using arithmetic rules that don't work
under modulo (overflow). Fixes PR1933.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47987 91177308-0d34-0410-b5e6-96231b3b80d8

Refine Cell's i64 constant generation code to cover more constants where the
upper and lower 32-bits are the same (in addition to 0 and -1 previously.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47985 91177308-0d34-0410-b5e6-96231b3b80d8

gcc likes things spelled correctly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47981 91177308-0d34-0410-b5e6-96231b3b80d8

Skip, for now, callsites where use of sret argument is not dominated by callsite.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47980 91177308-0d34-0410-b5e6-96231b3b80d8

Next bit of PPC ByVal handling; call-site code seems
correct now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47978 91177308-0d34-0410-b5e6-96231b3b80d8

Missed patch from my last commit

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47977 91177308-0d34-0410-b5e6-96231b3b80d8

Resolve aliases to aliasees, where possible

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47975 91177308-0d34-0410-b5e6-96231b3b80d8

Handle functions as targets during linking of aliases as well

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47974 91177308-0d34-0410-b5e6-96231b3b80d8

- Fix support for "special" i64 immediates that can be loaded
  using IL, ILA, et. al. v2i64 and i64 are now supported by
  the select bits (SELB) instruction.

- Add missing comparison operations (testcase forthcoming)

- More multiclass refactoring.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47973 91177308-0d34-0410-b5e6-96231b3b80d8

- Expand tabs to spaces.
- select_bits.ll now fully functional now that PR1993 is closed. It was
  previously broken by refactoring in SPUInstrInfo.td and using multiclasses.
- Same for eqv.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47972 91177308-0d34-0410-b5e6-96231b3b80d8

Update vcproj file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47969 91177308-0d34-0410-b5e6-96231b3b80d8

Try hard to link aliases. Checks can be too strict by now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47968 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a coalescer bug wrt how dead copy interval is shortened.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47966 91177308-0d34-0410-b5e6-96231b3b80d8

Handle 'ret' with multiple values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47965 91177308-0d34-0410-b5e6-96231b3b80d8

test for something more interesting than not crashing

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47962 91177308-0d34-0410-b5e6-96231b3b80d8

sync ops on ptrs, was breaking libgomp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47960 91177308-0d34-0410-b5e6-96231b3b80d8

Add Hybrid Cycle Detection to Andersen's analysis.
Patch by Curtis Dunham.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47959 91177308-0d34-0410-b5e6-96231b3b80d8

Clarify that CALLSEQ_START..END may not be nested,
and add some protection against creating such.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47957 91177308-0d34-0410-b5e6-96231b3b80d8

This patch fixes a problem encountered by the CellSPU backend where variants
were being pruned in patterns where a variable was used more than once, e.g.:

  (or (and R32C:$rA, R32C:$rC), (and R32C:$rB, (not R32C:$rC)))

In this example, $rC is used more than once and is actually significant to
instruction selection pattern matching when commuted variants are produced.
This patch scans the pattern's clauses and collects the variables, creating
a set of variables that are used more than once. TreePatternNode::isIsomorphicTo()
also understands that multiply-used variables are significant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47950 91177308-0d34-0410-b5e6-96231b3b80d8

evan implemented this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47948 91177308-0d34-0410-b5e6-96231b3b80d8

Fix test not to emit junk into source directory

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47947 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase for PR2054

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47946 91177308-0d34-0410-b5e6-96231b3b80d8

Remember the source->dest mapping when copying aliases. This fixes PR2054

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47945 91177308-0d34-0410-b5e6-96231b3b80d8

Clarify the state-of-the-art

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47944 91177308-0d34-0410-b5e6-96231b3b80d8

Use AC_PATH_PROG correctly:

    http://www.gnu.org/software/autoconf/manual/autoconf.html#Generic-Programs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47943 91177308-0d34-0410-b5e6-96231b3b80d8

isTwoAddress = 1 -> Constraints.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47941 91177308-0d34-0410-b5e6-96231b3b80d8

PSLLWri etc. are two-address instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47940 91177308-0d34-0410-b5e6-96231b3b80d8

add a note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47939 91177308-0d34-0410-b5e6-96231b3b80d8

Generalize FP constant shrinking optimization to apply to any vt
except ppc long double.  This allows us to shrink constant pool
entries for x86 long double constants, which in turn allows us to
use flds/fldl instead of fldt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47938 91177308-0d34-0410-b5e6-96231b3b80d8

Improve comment, pass in the original VT so that we can shrink a long double constant
all the way to float, not stopping at double.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47937 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore debugging related instructions if they get this far.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47934 91177308-0d34-0410-b5e6-96231b3b80d8

Rather than asserting. Dump out the MI that we are not able to encode and abort.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47933 91177308-0d34-0410-b5e6-96231b3b80d8

Codegen support for i128 UINT_TO_FP. This just fixes a
bug in r47928 (Int64Ty is the correct type for the constant
pool entry here) and removes the asserts, now that the code
is capable of handling i128.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47932 91177308-0d34-0410-b5e6-96231b3b80d8

Add a target lowering hook to control whether it's worthwhile to compress fp constant.
For x86, if sse2 is available, it's not a good idea since cvtss2sd is slower than a movsd load and it prevents load folding. On x87, it's important to shrink fp constant since fldt is very expensive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47931 91177308-0d34-0410-b5e6-96231b3b80d8

64bit CAS on 32bit x86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47929 91177308-0d34-0410-b5e6-96231b3b80d8

Codegen support for i128 SINT_TO_FP.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47928 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor code. Remove duplicated functions that basically do the same thing as
findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47927 91177308-0d34-0410-b5e6-96231b3b80d8

Skip functions that return multiple values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47924 91177308-0d34-0410-b5e6-96231b3b80d8

Check struct return type first.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47922 91177308-0d34-0410-b5e6-96231b3b80d8

Removed spurious EnablePPCRS check.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47918 91177308-0d34-0410-b5e6-96231b3b80d8

Move PPC lowering functions into PPCTargetLowering
class (cosmetic).  First piece of byval implementation;
this doesn't work yet.  No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47917 91177308-0d34-0410-b5e6-96231b3b80d8

Use -enable-ppc-regscavenger flag for these checks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47916 91177308-0d34-0410-b5e6-96231b3b80d8

Use a command-line option to turn register scavenging on/off for PPC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47915 91177308-0d34-0410-b5e6-96231b3b80d8

Print types for all ret operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47911 91177308-0d34-0410-b5e6-96231b3b80d8

Use while loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47909 91177308-0d34-0410-b5e6-96231b3b80d8

Revert SmallVector ctor variants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47908 91177308-0d34-0410-b5e6-96231b3b80d8

Use cast instead of dyn_cast.
Update test to use multiple return value directly, instead of relying on -sretpromotion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47907 91177308-0d34-0410-b5e6-96231b3b80d8

Filter nested structs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47906 91177308-0d34-0410-b5e6-96231b3b80d8

Handle multiple return values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47904 91177308-0d34-0410-b5e6-96231b3b80d8

x86-64 atomics

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47903 91177308-0d34-0410-b5e6-96231b3b80d8

Properly populate lists of defined/undefined symbols in presence of aliases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47900 91177308-0d34-0410-b5e6-96231b3b80d8

Add alias with non-external aliasee to the list of exported symbols of the library.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47899 91177308-0d34-0410-b5e6-96231b3b80d8

Use appropriate index to get the result value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47897 91177308-0d34-0410-b5e6-96231b3b80d8

Skip sret attribute while preparing attribute list for
new function and new call sites.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47896 91177308-0d34-0410-b5e6-96231b3b80d8

Add FunctionType ctor variant that takes SmallVector params.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47895 91177308-0d34-0410-b5e6-96231b3b80d8