copies being considered for removal. Make sure to track all of the copies,
rather than just the most recent encountered, by holding a DenseSet instead of
an unsigned in SrcMap.

No test case - couldn't reduce something with a sane size.

llvm-svn: 153487

llvm-svn: 153486

produces a 32-bit immediate which is consumed by the use. It tries to 
fold the immediate by breaking it into two parts and fold them into the
immmediate fields of two uses. e.g
       movw    r2, #40885
       movt    r3, #46540
       add     r0, r0, r3
=>
       add.w   r0, r0, #3019898880
       add.w   r0, r0, #30146560
;
However, this transformation is incorrect if the user produces a flag. e.g.
       movw    r2, #40885
       movt    r3, #46540
       adds    r0, r0, r3
=>
       add.w   r0, r0, #3019898880
       adds.w  r0, r0, #30146560
Note the adds.w may not set the carry flag even if the original sequence
would.

rdar://11116189

llvm-svn: 153484

llvm-svn: 153483

Fixes PR11882: NULL dereference in ComputeLoadConstantCompareExitLimit.

llvm-svn: 153480

llvm-svn: 153479

Patch by Ojab.

llvm-svn: 153476

llvm-svn: 153472

backtrace locations.

Testcase forthcoming, but I wanted to get some testing here.

Should fix:

PR12323
PR12314
rdar://11091100

llvm-svn: 153471

153465 was incorrect. In this code we wanted to check that the pointer operand is of pointer type (and not vector type).

llvm-svn: 153468

relocations.  The algorithm is the same as
that for x86_64.  Scattered relocations, a
feature present in i386 but not on x86_64,
are not yet supported.

llvm-svn: 153466

llvm-svn: 153465

Fixes PR11950.

llvm-svn: 153463

llvm-svn: 153462

llvm-svn: 153458

llvm-svn: 153457

llvm-svn: 153456

llvm-svn: 153455

Original commit message:
Use the new range metadata in computeMaskedBits and add a new optimization to
instruction simplify that lets us remove an and when loading a boolean value.

llvm-svn: 153452

Thanks Andrey.

llvm-svn: 153451

llvm-svn: 153450

[tsan] treat vtable pointer updates in a special way (requires tbaa); fix a bug (forgot to return true after instrumenting); make sure the tsan tests are run

llvm-svn: 153448

llvm-svn: 153438

llvm-svn: 153436

Patch by Sylvestre Ledru!

llvm-svn: 153435

llvm-svn: 153433

llvm-svn: 153432

llvm-svn: 153429

llvm-svn: 153428

--enable-libcpp to projects/sample.

Patch by Dmitri Shubin with additional fixes by me.

llvm-svn: 153425

Fixes PR12050

llvm-svn: 153424

instruction simplify that lets us remove an and when loding a boolean value.

llvm-svn: 153423

llvm-svn: 153422

llvm-svn: 153421

constant-offsets of a common base using the generic GEP-walking logic
I added for computing pointer differences in the same situation.

llvm-svn: 153419

inbounds GEPs. This isn't really necessary for simplifying pointer
differences, but I'm planning to re-use the same code to simplify
pointer comparisons where it is necessary. Since real code almost
exclusively uses inbounds GEPs, it doesn't seem worth it to support the
extra complexity of turning it on and off. If anyone would like that
back, feel free to shout. Note that instcombine will still catch any of
these patterns.

llvm-svn: 153418

llvm-svn: 153415

llvm-svn: 153414

llvm-svn: 153412

Thanks Duncan.

llvm-svn: 153411