Adding a summary for NSError

llvm-svn: 169792

1. Teach it to use overlapping unaligned load / store to copy / set the trailing
   bytes. e.g. On 86, use two pairs of movups / movaps for 17 - 31 byte copies.
2. Use f64 for memcpy / memset on targets where i64 is not legal but f64 is. e.g.
   x86 and ARM.
3. When memcpy from a constant string, do *not* replace the load with a constant
   if it's not possible to materialize an integer immediate with a single
   instruction (required a new target hook: TLI.isIntImmLegal()).
4. Use unaligned load / stores more aggressively if target hooks indicates they
   are "fast".
5. Update ARM target hooks to use unaligned load / stores. e.g. vld1.8 / vst1.8.
   Also increase the threshold to something reasonable (8 for memset, 4 pairs
   for memcpy).

This significantly improves Dhrystone, up to 50% on ARM iOS devices.

rdar://12760078

llvm-svn: 169791

Analyse Phis under the starting assumption that they are NoAlias. Recursively
look at their inputs.
If they MayAlias/MustAlias there must be an input that makes them so.

Addresses bug 14351.

llvm-svn: 169788

When there is XPC connection error, we will report it now.

llvm-svn: 169787

InitSections is called before the MCContext is initialized it could cause
duplicate temporary symbols to be emitted later (after context initialization
resets the temporary label counter).

llvm-svn: 169785

beyond array bounds.

No test case since I cannot reproduce an ICE with this bug. According
to Carlos -- the bug reporter -- a segfault occurs only when LLVM is
compiled with a specific version of GCC.

llvm-svn: 169783

When displaying function.name-with-args format will now print "varname=<unavailable>" instead of omitting argument names and values when there is an error reading the value.

llvm-svn: 169781

llvm-svn: 169780

llvm-svn: 169779

llvm-svn: 169778

llvm-svn: 169776

llvm-svn: 169775

llvm-svn: 169774

llvm-svn: 169773

llvm-svn: 169772

llvm-svn: 169771

The linker will call `lto_codegen_add_must_preserve_symbol' on all globals that
should be kept around. The linker will pretend that a dylib is being created.
<rdar://problem/12528059>

llvm-svn: 169770

llvm-svn: 169768

- gcc does not like -fno-rtti mixed with dynamic_cast<> (in cxa_demangle.cpp)

llvm-svn: 169767

llvm-svn: 169764

Also, add the -S option.

llvm-svn: 169763

llvm-svn: 169762

was #import'ed.

llvm-svn: 169761

getMipsRegisterNumbering and use MCRegisterInfo::getEncodingValue instead.

llvm-svn: 169760

Making MightHaveChildren() always return true regardless for our own data formatters
This is meant to optimize performance for common most-often-not-empty container classes

llvm-svn: 169759

going on and makes a lot of the terminology in comments make more sense.

llvm-svn: 169758

llvm-svn: 169757

llvm-svn: 169756

This prevents the functions generated by that pass from using the red zone.
<rdar://problem/12843084>

llvm-svn: 169755

The `-mno-red-zone' flag wasn't being propagated to the functions that code
coverage generates. This allowed some of them to use the red zone when that
wasn't allowed.
<rdar://problem/12843084>

llvm-svn: 169754

Fix the OptionValueFileSpec option value to correctly get the file path when trailing spaces are on the path. The "settings set" command uses the OptionValueFileSpec class to set file paths and if extra spaces are at the end it will include those in the paths. Now we chop up the value send to to OptionValueFileSpec::SetValueFromCString(...) function with "lldb_private::Args" and give an appropriate error if more than one path is used. It also allows for quotes to be used when specifying the path.

llvm-svn: 169753

while (i--)
 sum+=A[i];

llvm-svn: 169752

Change the wording of NSNumber summary from absurd value to unexpected value when a tagged pointer shows up that does not match our knowledge of the internals

llvm-svn: 169751

    lldb.target
    lldb.process
    lldb.thread
    lldb.frame

are initialized to at least contain empty lldb classes in case some python gets imported that uses them.

llvm-svn: 169750

If the local checkout does not have 'git svn' references set up, don't try
to use 'git svn' for version information.

llvm-svn: 169749

the assembler. This is useful in order to know how the numbers add up,
since in particular the Align fragments account for a non-trivial
portion of the emitted fragments (especially on -O0 which sets
relax-all).

llvm-svn: 169747

Fix spacing before ",".

llvm-svn: 169746

misched used GetUnderlyingObject in order to break false load/store
dependencies, and the -enable-aa-sched-mi feature similarly relied on
GetUnderlyingObject in order to ensure it is safe to use the aliasing analysis.
Unfortunately, GetUnderlyingObject does not recurse through phi nodes, and so
(especially due to LSR) all of these mechanisms failed for
induction-variable-dependent loads and stores inside loops.

This change replaces uses of GetUnderlyingObject with GetUnderlyingObjects
(which will recurse through phi and select instructions) in misched.

Andy reviewed, tested and simplified this patch; Thanks!

llvm-svn: 169744

llvm-svn: 169743

PR14343

llvm-svn: 169742