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

Place the structure data into `cfstring`.  This both isolates the structures to
permit coalescing in the future (by the linker) as well as ensures that it
doesnt get marked as read-only data.  The structures themselves are not
read-only, only the string contents.

llvm-svn: 274956

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

When calling "settings set target.source-map <old-path> <new-path>", make sure that <new-path> exists before accepting it as a remapping.

We had some clients that had added old source paths remappings to their .lldbinit files and they were causing trouble at a later date. This fix should help mitigate these issues.

<rdar://problem/26358860>

llvm-svn: 274948

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 r274873 until additional fixes are resolved.

llvm-svn: 274944

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

NFC.

llvm-svn: 274940

llvm-svn: 274939

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

Reviewers: tejohnson, eraman, mehdi_amini

Subscribers: mehdi_amini, llvm-commits

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

llvm-svn: 274938

llvm-svn: 274937

Use typedef Result in BlockFrequencyAnalysis::run.  Fix typo in comment.

llvm-svn: 274936

This is a follow-on to r274452.

The LAA with the new PM is a loop pass so we go from inner to outer loops.

Also using a CHECK-NOT didn't make much sense because we print something
in either case; whether an invariant is 'found' or 'not found'.

llvm-svn: 274935

llvm-svn: 274934

Avoid implicit conversions from MachineInstrBundleIIterator to
MachineInstr* in the MSP430 backend by preferring MachineInstr& over
MachineInstr* when a pointer isn't nullable.

llvm-svn: 274933

This isn't a sure thing (are 2 extra bitcasts less expensive than a logic op?), 
but we'll try to err on the conservative side by going with the case that has
less IR instructions.

Note: This question came up in http://reviews.llvm.org/D22114 , but this part is
independent of that patch proposal, so I'm making this small change ahead of that
one. 

See also:
http://reviews.llvm.org/rL274926

llvm-svn: 274932

Avoid implicit conversions from MachineInstrBundleIterator to
MachineInstr* in the NVPTX backend, mainly by preferring MachineInstr&
over MachineInstr* when a pointer isn't nullable and using range-based
for loops.

There was one piece of questionable code in
NVPTXInstrInfo::AnalyzeBranch, where a condition checked a pointer
converted from an iterator for nullptr.  Since this case is impossible
(moreover, the code above guarantees that the iterator is valid), I
removed the check when I changed the pointer to a reference.

Despite that case, there should be no functionality change here.

llvm-svn: 274931

Patch reviewed by Richard Smith (D22168).

llvm-svn: 274930

llvm-svn: 274929

Because isReallyTriviallyReMaterializableGeneric puts many limits on
rematerializable instructions, this fix can prevent instructions with
tied virtual operands and instructions with virtual register uses from
being kept in DeadRemat, so as to workaround the live interval consistency
problem for the dummy instructions kept in DeadRemat.

But we still need to fix the live interval consistency problem. This patch
is just a short time relieve. PR28464 has been filed as a reminder.

Differential Revision: http://reviews.llvm.org/D19486

llvm-svn: 274928

llvm-svn: 274927

llvm-svn: 274926

llvm-svn: 274925

Avoid implicit conversions from MachineInstrBundleInstr to MachineInstr*
in the AArch64 backend, mainly by preferring MachineInstr& over
MachineInstr* when a pointer isn't nullable.

llvm-svn: 274924

Add OCL option -cl-no-signed-zeros to driver options.

Also added to opencl.cl testcases.

Patch by Aaron En Ye Shi.

Differential Revision: http://reviews.llvm.org/D22067

llvm-svn: 274923

llvm-svn: 274922

llvm-svn: 274921

Remove remaining implicit conversions from MachineInstrBundleIterator to
MachineInstr* from the ARM backend.  In most cases, I made them less attractive
by preferring MachineInstr& or using a ranged-based for loop.

Once all the backends are fixed I'll make the operator explicit so that this
doesn't bitrot back.

llvm-svn: 274920

Ran clang-format to remove the namespace indentation, and stopped
repeating names in doc comments since I was updating every line
anyway.

llvm-svn: 274919

Summary: As we will move to use uniformed hotness check in inliner, we do not need inline hints in SampleProfile pass any more.

Reviewers: dnovillo, davidxl

Subscribers: eraman, llvm-commits

Differential Revision: http://reviews.llvm.org/D19287

llvm-svn: 274918