the processor keeps a return addresses stack (RAS) which stores the address
and the instruction execution state of the instruction after a function-call
type branch instruction.

Calling a "noreturn" function with normal call instructions (e.g. bl) can
corrupt RAS and causes 100% return misprediction so LLVM should use a
unconditional branch instead. i.e.
mov lr, pc
b _foo
The "mov lr, pc" is issued in order to get proper backtrace.

rdar://8979299

llvm-svn: 151623

llvm-svn: 151622

Reverted r152620 - DSE: Shorten memset when a later store overwrites the start of it.  There were all sorts of buildbot issues

llvm-svn: 151621

llvm-svn: 151620

llvm-svn: 151618

llvm-svn: 151617

llvm-svn: 151616

llvm-svn: 151615

llvm-svn: 151614

closest function context (Keychain API).

llvm-svn: 151613

Mac OS X. Patch by Fabian Groffen, with a slight tweak by me.

llvm-svn: 151612

load and store instructions.

llvm-svn: 151611

Don't attempt to extend physreg live ranges across calls.

<rdar://problem/10942095>

llvm-svn: 151610

llvm-svn: 151609

When allocated buffer is passed to CF/NS..NoCopy functions, the
ownership is transfered unless the deallocator argument is set to
'kCFAllocatorNull'.

llvm-svn: 151608

llvm-svn: 151607

llvm-svn: 151606

Allows the debugger to put a more sensible prompt when debugging as root.

llvm-svn: 151605

When an outgoing call takes more than 2k of arguments on the stack, we
don't allocate that call frame in the prolog, but adjust the stack
pointer immediately before the call instead.

This causes problems with the emergency spill slot because PEI can't
track stack pointer adjustments on the second pass, and if the outgoing
arguments are too big, SP can't be used to reach the emergency spill
slot at all.

Work around these problems by ensuring there is a base or frame pointer
that can be used to access the emergency spill slot.

<rdar://problem/10917166>

llvm-svn: 151604

Implement IRGen for the retain-autorelease in the lambda conversion-to-block-pointer outside of ARC.  Testcases coming up soon.

llvm-svn: 151603

[analyzer] teach analyzer about ObjC literals, thus trimming out a false positive with the malloc() checker involving
comparing literal addresses to nil.

Fixes <rdar://problem/10579586>

llvm-svn: 151602

Add -D option to llvm-nm to dump dynamic symbols.

Patch by David Meyer.

llvm-svn: 151600

llvm-svn: 151599

llvm-svn: 151596

All known nightly-test failures are fixed.

llvm-svn: 151595

llvm-svn: 151594

and one for another error message.

llvm-svn: 151593

closest function context. 

This prevents us from uniqueing all leaks from the same allocation
helper. radar://10932226

llvm-svn: 151592

so no testing was actually done.  Further, the commands produce no output.
The redirection has been fixed and the test has been disabled.

llvm-svn: 151591

This patch adds instruction latencies for the SSE instructions
to the instruction scheduler for the Intel Atom.

llvm-svn: 151590

[analyzer] Don't generate an explicit ExplodedNode for StringLiterals; have the SVal lazily generated from Environment::getSVal().

llvm-svn: 151589

llvm-svn: 151588

llvm-svn: 151587

llvm-svn: 151586

depth and error if we exceed a max value, to make sure we avoid a stack overflow.

This is a hacky temporary fix. rdar://10913206.

llvm-svn: 151585

Duncan pointed out that if the alignment isn't explicitly specified, it defaults to the ABI alignment.  Given that, make this code a bit more aggressive in such cases.

llvm-svn: 151584

During the test case tearDown(), give it one final blow to make sure the child process spawned by pexpect is terminated.
Fix the issue of many '(lldb)' zombie processes observed by Jim.

llvm-svn: 151583

llvm-svn: 151582

Fixed an error where if we tried to format a ValueObject using a format
that was incorrect for a variable, then it would set ValueObject::m_error
to an error state and stop the value from being able to be updated. We now
leave m_error alone and only let the update value code change that. Any errors
in formatting will return a valid value as C string that contains an error 
string. This lets us then modify the format and redisplay without any issues.

llvm-svn: 151581

llvm-svn: 151580