llvm-svn: 92972

llvm-svn: 92964

that feeds into a zext, similar to the patch I did yesterday for sext.
There is a lot of room for extension beyond this patch.

llvm-svn: 92962

When folding a and(any_ext(load)) both the any_ext and the
load have to have only a single use.

This removes the anyext-uses.ll testcase which started failing
because it is unreduced and unclear what it is testing.

llvm-svn: 92950

time, no functionality change.

llvm-svn: 92948

llvm-svn: 92943

llvm-svn: 92938

add it to the constant pool for fast-isel. We already
don't add it for the normal case.

llvm-svn: 92934

not-readonly segment on darwin.

llvm-svn: 92933

llvm-svn: 92931

llvm-svn: 92921

llvm-svn: 92920

llvm-svn: 92919

llvm-svn: 92918

llvm-svn: 92912

are prepared to look through.

llvm-svn: 92898

llvm-svn: 92896

llvm-svn: 92892

to an element of a vector in a static ctor) which occurs with an 
unrelated patch I'm testing.  Annoyingly, EvaluateStoreInto basically 
does exactly the same stuff as InsertElement constant folding, but it
now handles vectors, and you can't insertelement into a vector.  It
would be 'really nice' if GEP into a vector were not legal.

llvm-svn: 92889

Fix a minor regression from my dag combiner changes. One more place which needs to look pass truncates.

llvm-svn: 92885

std::vector and llvm::SmallVector have annoying performance
tradeoffs. No, I don't expect this to matter, and now it won't.

llvm-svn: 92884

llvm-svn: 92876

llvm-svn: 92874

Some instructions refer to unique labels, and so cannot be trivially cloned
with CloneMachineInstr.

llvm-svn: 92873

for stack references.

llvm-svn: 92871

multiple register definitions.

llvm-svn: 92864

it work for any integer size return type.

llvm-svn: 92853

llvm-svn: 92850

(OP (trunc x), (trunc y)) -> (trunc (OP x, y))

Unfortunately this simple change causes dag combine to infinite looping. The problem is the shrink demanded ops optimization tend to canonicalize expressions in the opposite manner. That is badness. This patch disable those optimizations in dag combine but instead it is done as a late pass in sdisel.

This also exposes some deficiencies in dag combine and x86 setcc / brcond lowering. Teach them to look pass ISD::TRUNCATE in various places.

llvm-svn: 92849

llvm-svn: 92838

llvm-svn: 92837

phi nodes when deciding which pointers point to local memory.
I actually checked long ago how useful this is, and it isn't
very: it hardly ever fires in the testsuite, but since Chris
wants it here it is!

llvm-svn: 92836

llvm-svn: 92831

llvm-svn: 92830

memcpy, memset and other intrinsics that only access their arguments
to be readnone if the intrinsic's arguments all point to local memory.
This improves the testcase in the README to readonly, but it could in
theory be made readnone, however this would involve more sophisticated
analysis that looks through the memcpy.

llvm-svn: 92829

llvm-svn: 92824

bootstrap.

llvm-svn: 92818

synonyms for PPC.

llvm-svn: 92817

Previously, instcombine would only promote an expression tree to
the larger type if doing so eliminated two casts.  This is because
a need to manually do the sign extend after the promoted expression
tree with two shifts.  Now, we keep track of whether the result of
the computation is going to be properly sign extended already.  If
so, we can unconditionally promote the expression, which allows us
to zap more sext's.

This implements rdar://6598839 (aka gcc pr38751)

llvm-svn: 92815

An instruction like this:

  %reg1097:1<def> = VMOVSR %R3<kill>, 14, %reg0

Must be replaced with this when substituting physical registers:

  %S0<def> = VMOVSR %R3<kill>, 14, %reg0, %D0<imp-def>

llvm-svn: 92812