Two return types are not equivalent if one is a pointer and the other is an
integral. This is because we cannot bitcast a pointer to an integral value.
PR15185

llvm-svn: 179569

This patch allows the assembler to recognize $fcc0 
as a valid register for conditional move instructions. 

Corresponding test cases have been added.

Contributer: Vladimir Medic
llvm-svn: 179567

SLPVectorizer: Make it a function pass and add code for hoisting the vector-gather sequence out of loops.

llvm-svn: 179562

Instead of emitting config values in a predefined order, the code
emitter will now emit a 32-bit register index followed by the 32-bit
config value.

llvm-svn: 179546

llvm-svn: 179545

llvm-svn: 179544

llvm-svn: 179532

I can fix the testcases here:

http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/6952

This reverts commit r179512 due to testcases specifying triples
that they didn't actually mean and causing failures on other platforms.

llvm-svn: 179513

llvm-svn: 179512

llvm-svn: 179504

This fixes an ABI bug for non-Darwin PPC64. For the callee-saved condition
registers, the spill location is specified relative to the stack pointer (SP +
8). However, this is not relative to the SP after the new stack frame is
established, but instead relative to the caller's stack pointer (it is stored
into the linkage area of the parent's stack frame).

So, like with the link register, we don't directly spill the CRs with other
callee-saved registers, but just mark them to be spilled during prologue
generation.

In practice, this reverts r179457 for PPC64 (but leaves it in place for PPC32).

llvm-svn: 179500

This reverts commit r179497 and the accompanying commit as it broke random platforms that aren't osx.

llvm-svn: 179499

llvm-svn: 179498

llvm-svn: 179494

One performs: (X == 13 | X == 14) -> X-13 <u 2
The other: (A == C1 || A == C2) -> (A & ~(C1 ^ C2)) == C1

The problem is that there are certain values of C1 and C2 that
trigger both transforms but the first one blocks out the second,
this generates suboptimal code.

Reordering the transforms should be better in every case and
allows us to do interesting stuff like turn:
  %shr = lshr i32 %X, 4
  %and = and i32 %shr, 15
  %add = add i32 %and, -14
  %tobool = icmp ne i32 %add, 0

into:
  %and = and i32 %X, 240
  %tobool = icmp ne i32 %and, 224

llvm-svn: 179493

llvm-svn: 179492

Test case by llvm-stress.

llvm-svn: 179477

llvm-svn: 179476

SLPVectorizer: Add support for trees that don't start at binary operators, and add the cost of extracting values from the roots of the tree.

llvm-svn: 179475

For when 16 TB just isn't enough.

llvm-svn: 179474

This is the default model for non-PIC 64-bit code. It supports
text+data+bss linked anywhere in the low 16 TB of the address space.

llvm-svn: 179473

Constant pool entries are accessed exactly the same way as global
variables.

llvm-svn: 179471

llvm-svn: 179470

This fixes the pic32 code model for SPARC v9.

llvm-svn: 179469

Currently, only abs32 and pic32 are implemented. Add a test case for
abs32 with 64-bit code. 64-bit PIC code is currently broken.

llvm-svn: 179463

There is a Constant with non-constant operands: blockaddress.

llvm-svn: 179460

This is basically the same fix in three different places. We use a set to avoid
walking the whole tree of a big ConstantExprs multiple times.

For example: (select cmp, (add big_expr 1), (add big_expr 2))
We don't want to visit big_expr twice here, it may consist of thousands of
nodes.

The testcase exercises this by creating an insanely large ConstantExprs out of
a loop. It's questionable if the optimizer should ever create those, but this
can be triggered with real C code. Fixes PR15714.

llvm-svn: 179458

For functions that need to spill CRs, and have dynamic stack allocations, the
value of the SP during the restore is not what it was during the save, and so
we need to use the FP in these cases (as for all of the other spills and
restores, but the CR restore has a special code path because its reserved slot,
like the link register, is specified directly relative to the adjusted SP).

llvm-svn: 179457

The order of copies depends on queue order, which is not very stable.

llvm-svn: 179456

llvm-svn: 179455

llvm-svn: 179453

The register allocator expects minimal physreg live ranges. Schedule
physreg copies accordingly. This is slightly tricky when they occur in
the middle of the scheduling region. For now, this is handled by
rescheduling the copy when its associated instruction is
scheduled. Eventually we may instead bundle them, but only if we can
preserve the bundles as parallel copies during regalloc.

llvm-svn: 179449

We are now able to handle big endian macho files in llvm-readobject. Thanks to
David Fang for providing the object files.

llvm-svn: 179440

llvm-svn: 179434

llvm-svn: 179422

instructions.

llvm-svn: 179421

llvm-svn: 179420

llvm-svn: 179418

Fixes PR15737.

llvm-svn: 179417

SLPVectorizer: add support for vectorization of diamond shaped trees. We now perform a preliminary traversal of the graph to collect values with multiple users and check where the users came from. 

llvm-svn: 179414