The ARMARM specifies these instructions as unpredictable when storing the
writeback register. This shouldn't affect code generation much since storing a
pointer to itself is quite rare.

llvm-svn: 129409

registers for fast allocation.

Fixes rdar://9207598

llvm-svn: 129408

llvm-svn: 129407

llvm-svn: 129406

llvm-svn: 129405

values are also transmitted through branches which cause side effects to
be skipped altogether.

llvm-svn: 129404

llvm-svn: 129403

This mechanical patch moves type handling into CompileUnit from DwarfDebug. In case of multiple compile unit in one object file, each compile unit is responsible for its own set of type entries anyway. This refactoring makes this obvious.

llvm-svn: 129402

Now that we have a first-class way to represent unaligned loads, the unaligned
load intrinsics are superfluous.

First part of <rdar://problem/8460511>.

llvm-svn: 129401

llvm-svn: 129400

generators. It may improve robustness when testing from VS too.

Based on a patch by David Neto!

llvm-svn: 129398

because the result is ignored.  The particular example here is with
property l-values, but there could be all sorts of lovely casts that this
isn't safe for.  Sink the check into the one case that seems to actually
be capable of honoring this.

llvm-svn: 129397

modify the driver planning.

llvm-svn: 129396

llvm-svn: 129395

Fix another IdempotentOperationsChecker corner case when determining if an active block on the worklist
impacts the results of the check.

llvm-svn: 129394

llvm-svn: 129393

llvm-svn: 129392

In addition, the base register is not rGPR, but GPR with th exception that:

    if n == 15 then UNPREDICTABLE

rdar://problem/9273836

llvm-svn: 129391

Use a Bitvector instead, we didn't need the smaller memory footprint anyway.
This makes the greedy register allocator 10% faster.

llvm-svn: 129390

llvm-svn: 129389

Add handling for tracking the relocations on symbols and resolving them.
Keep track of the relocations even after they are resolved so that if
the RuntimeDyld client moves the object, it can update the address and any
relocations to that object will be updated.

For our trival object file load/run test harness (llvm-rtdyld), this enables
relocations between functions located in the same object module. It should
be trivially extendable to load multiple objects with mutual references.

As a simple example, the following now works (running on x86_64 Darwin 10.6):


$ cat t.c
int bar() {
  return 65;
}

int main() {
  return bar();
}
$ clang t.c -fno-asynchronous-unwind-tables -o t.o -c
$ otool -vt t.o
t.o:
(__TEXT,__text) section
_bar:
0000000000000000  pushq %rbp
0000000000000001  movq  %rsp,%rbp
0000000000000004  movl  $0x00000041,%eax
0000000000000009  popq  %rbp
000000000000000a  ret
000000000000000b  nopl  0x00(%rax,%rax)
_main:
0000000000000010  pushq %rbp
0000000000000011  movq  %rsp,%rbp
0000000000000014  subq  $0x10,%rsp
0000000000000018  movl  $0x00000000,0xfc(%rbp)
000000000000001f  callq 0x00000024
0000000000000024  addq  $0x10,%rsp
0000000000000028  popq  %rbp
0000000000000029  ret
$ llvm-rtdyld t.o -debug-only=dyld ; echo $?
Function sym: '_bar' @ 0
Function sym: '_main' @ 16
Extracting function: _bar from [0, 15]
    allocated to 0x100153000
Extracting function: _main from [16, 41]
    allocated to 0x100154000
Relocation at '_main' + 16 from '_bar(Word1: 0x2d000000)
Resolving relocation at '_main' + 16 (0x100154010) from '_bar (0x100153000)(pcrel, type: 2, Size: 4).
loaded '_main' at: 0x100154000
65
$

llvm-svn: 129388

rdar://problem/9269047

llvm-svn: 129387

llvm-svn: 129386

llvm-svn: 129385

specifier.

llvm-svn: 129384

UnitsSharePred was a source of randomness in the scheduler: node
priority depended on the queue data structure. I rewrote the recent
VRegCycle heuristics to completely replace the old heuristic without
any randomness. To make these heuristic adjustments to node latency work,
I also needed to do something a little more reasonable with TokenFactor. I
gave it zero latency to its consumers and always schedule it as low as
possible.

llvm-svn: 129383

Patch by arrowdodger!

llvm-svn: 129381

llvm-svn: 129380

This merges the behavior of splitSingleBlocks into splitAroundRegion, so the
RS_Region and RS_Block register stages can be coalesced. That means the leftover
intervals after region splitting go directly to spilling instead of a second
pass of per-block splitting.

llvm-svn: 129379

llvm-svn: 129378

be specified as '1' (add = TRUE).

Also add a utility function for Thumb2.

llvm-svn: 129377

This makes it possible to target multiple registers in one pass.

llvm-svn: 129374

llvm-svn: 129373

llvm-svn: 129368

llvm-svn: 129367

ArrayBoundCheckerV2: don't arbitrarily warn about indexing before the 0-index of a symbolic region.  In many cases that isn't really the base offset.

llvm-svn: 129366

llvm-svn: 129365

This patch adds modeling of strcmp() to the CString checker. Validates inputs are not NULL and are real C strings, then does the comparison and binds the proper return value. Unit tests included. 

llvm-svn: 129364

the initialized's protocol and yet clang warns.
objective-c issue, // rdar://9267196

llvm-svn: 129363

llvm-svn: 129362