In the solver, isUndefined() does really mean "we don't know the
value yet" rather than "this is an UndefinedValue". Discussed with
Eli Friedman.

Differential Revision:  http://reviews.llvm.org/D22192

llvm-svn: 275004

llvm-svn: 275002

llvm-svn: 275000

This should have been done as part of the move in r274960.

llvm-svn: 274999

This code was already commented out and it made some weird assumptions,
e.g. using isUndefined() as "this value is UndefValue" instead of
"we haven't computed this value is yet". Thanks to Eli Friedman for
pointing out where I was wrong (and where this code was wrong).

llvm-svn: 274995

llvm-svn: 274990

llvm-svn: 274988

llvm-svn: 274987

There exists no relocation which can describe the address of a
dllimported variable: do not try to describe their location.

llvm-svn: 274986

    
ConstantInt::getSExtValue may fail on >64-bit integers. Add checks to call
getSExtValue only on narrow integers.

As a minor aside, simplify slsr-gep.ll to remove unnecessary load instructions.

llvm-svn: 274982

llvm-svn: 274981

[lanai] Treat .t as optional in assembly parser for RR operands and add predicate operand to ShiftRR

llvm-svn: 274980

llvm-svn: 274979

llvm-svn: 274978

No functionality change intended.

llvm-svn: 274973

llvm-svn: 274972

llvm-svn: 274971

llvm-svn: 274970

Also fix test not actually using function labels.

llvm-svn: 274969

[X86] Remove sse41 extract intrinsics. They are not used by clang and are not implemented by the x86 backend.

llvm-svn: 274967

llvm-svn: 274966

Chandler pointed out in his review but I forgot to remove before
committing, my bad.

llvm-svn: 274963

llvm-svn: 274962

`const` was dropped by r274958, and the lack of `const` makes GCC6
(correctly) complain.

llvm-svn: 274961

llvm-svn: 274960

While here move simplifyLoop() function to the new header, as
suggested by Chandler in the review.

Differential Revision:  http://reviews.llvm.org/D21404

llvm-svn: 274959

Patch by Jia Chen.

Differential Revision: http://reviews.llvm.org/D22022

llvm-svn: 274958

This removes a few fields from the graph builder by making us compute
things (that we'd always compute anyway) more eagerly.

Patch by Jia Chen.

Differential Revision: http://reviews.llvm.org/D22009

llvm-svn: 274957

Drive-by improvement: We would 1) add CSRs, 2) remove callee saved CSRs
and 3) add all CSRs again for the return block.  Just adding CSRs once
obviously gives the same results.

llvm-svn: 274955

llvm-svn: 274954

llvm-svn: 274953

An identity COPY like this:
   %AL = COPY %AL, %EAX<imp-def>
has no semantic effect, but encodes liveness information: Further users
of %EAX only depend on this instruction even though it does not define
the full register.

Replace the COPY with a KILL instruction in those cases to maintain this
liveness information. (This reverts a small part of r238588 but this
time adds a comment explaining why a KILL instruction is useful).

llvm-svn: 274952

llvm-svn: 274951

Reviewers: alexfh, wolfgangp, rengolin

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D22172

llvm-svn: 274949

Summary:
This way the metadata will be only generated when asserts enabled,
or when -enable-import-metadata specified

FIXED missing colon on requires.

Reviewers: tejohnson, eraman, mehdi_amini

Subscribers: mehdi_amini, llvm-commits

Differential Revision: http://reviews.llvm.org/D22167

llvm-svn: 274947

Reverting because of 17463
http://lab.llvm.org:8011/builders/clang-x86_64-linux-selfhost-modules/builds/17463

This reverts commit d20cb431bba2ba43b4c65a8556cff445bfefbb7c.

llvm-svn: 274946

llvm-svn: 274945

This reverts commit r274853.
Caused failure in ppcBE build

llvm-svn: 274943

Avoid implicit conversions from MachineInstrBundleIterator to
MachineInstr* in the Lanai backend.

llvm-svn: 274942

Our assertions in WinCOFFStreamer had unexpected side effects resulting
in symbols getting unexpectedly marked as used.

This fixes PR28462.

llvm-svn: 274941