llvm-svn: 177207

Fixes a FIXME, improves dead symbol collection, suppresses a false positive,
which resulted from reusing the same symbol twice for simulation of 2 calls to the same function.

Fixing this lead to 2 possible false negatives in CString checker. Since the checker is still alpha and
the solution will not require revert of this commit, move the tests to a FIXME section.

llvm-svn: 177206

llvm-svn: 177205

llvm-svn: 177204

Performance improvements to the IsObjCNil () - we only try to resolve the value if the variable under consideration truly is an “Objective-C thing”
This also changes the ClangASTContext to make sure that id is correctly marked as being such an ObjC thing

llvm-svn: 177203

Don't discount regions that vmmap is not discounting.

llvm-svn: 177202

Fix buffer underrun (invalid read) triggered during diagnostic rendering.  The test would overflow when computing '0 - 1'.

I don't have a good testcase for this that does not depend on system headers.
It did not trigger with preprocessed output, and I had trouble reducing the example.

Fixes <rdar://problem/13324594>.

Thanks to Michael Greiner for reporting this issue.

llvm-svn: 177201

in the -a address expression lookup in "image list" so that it actually works.

llvm-svn: 177200

Don't require instructions to inherit Sched<...>. Sometimes it is more
convenient to say:

  let SchedRW = ... in {
    ...
  }

Which is now possible.

llvm-svn: 177199

llvm-svn: 177198

These will be available in the current translation unit anyway, for
modules they only waste space and deserialization time.

llvm-svn: 177197

llvm-svn: 177196

resolved command, which it should not do.  It should adopt whatever context the
regular expression command was called with.  This was causing regular expression
commands run inside breakpoint commands to adopt the currently selected context,
not the one coming from the breakpoint that we hit.

<rdar://problem/13411771>

llvm-svn: 177195

When we're building a precompiled header or module against an SDK on
Darwin, there will be a file SDKSettings.plist in the sysroot. Since
stat()'ing every system header on which a module or PCH file depends
is performance suicide, we instead stat() just SDKSettings.plist. This
hack works well on Darwin; it's unclear how we want to handle this on
other platforms. If there is a canonical file, we should use it; if
not, we either have to take the performance hit of stat()'ing system
headers repeatedly or roll the dice by not checking anything.

llvm-svn: 177194

llvm-svn: 177193

Patch by Ashok Thirumurthi.

llvm-svn: 177192

This is QoI.  Fixes <rdar://problem/13076064>.

llvm-svn: 177190

The previous generatePathDiagnostic() was intended to be tail-recursive,
restarting and trying again if a report was marked invalid. However:
 (1) this leaked all the cloned visitors, which weren't being deleted, and
 (2) this wasn't actually tail-recursive because some local variables had
     non-trivial destructors.

This was causing us to overflow the stack on inputs with large numbers of
reports in the same equivalence class, such as sqlite3.c. Being iterative
at least prevents us from blowing out the stack, but doesn't solve the
performance issue: suppressing thousands (yes, thousands) of paths in the
same equivalence class is expensive. I'm looking into that now.

<rdar://problem/13423498>

llvm-svn: 177189

We discovered that sqlite3.c currently has 2600 reports in a single
equivalence class; it would be good to know if this is a recent
development or what.

(For the curious, the different reports in an equivalence class represent
the same bug found along different paths. When we're suppressing false
positives, we need to go through /every/ path to make sure there isn't a
valid path to a bug. This is a flaw in our after-the-fact suppression,
made worse by the fact that that function isn't particularly optimized.)

llvm-svn: 177188

For debugging use only; no functionality change.

llvm-svn: 177187

Silences a few false positives in LLVM.

llvm-svn: 177186

No functionality change.

llvm-svn: 177185

This cleans up the Clang -Werror build that was broken by r177180.

llvm-svn: 177184

 - This fast path is almost 100% effective on real code, and lets us avoid
   multiple allocations of 128-bit APSInt objects in the common case.

 - As with any overflow-check-skipping-code, I'd appreciate someone double
   checking my logic.

llvm-svn: 177183

These are a burden to maintain & use hand crafted IR to test particular DWARF
generation cases in LLVM. If someone thinks there's high value coverage here
they can rephrase these as IR+dwarfdump tests in the LLVM regression suite so
they'll be portable/easily executed by all developers.

llvm-svn: 177182

operations. // rdar://13423975

llvm-svn: 177181

difference is stored inside a DiffNode.  This should not change any
diagnostic messages.

llvm-svn: 177180

The outer-most explicit cast is now left alone by the Use-Nullptr transform to
maintain the type of the expression and avoid introducing ambiguities.

Fixes PR15395.

Author: Ariel J Bernal <ariel.j.bernal@intel.com>
llvm-svn: 177179

 - The previous implementation always constructed the StringMap entry, even if
   the key was present in the set.

llvm-svn: 177178

Information messages sent to stdout by ClangTool now only happen when the
-debug flag is set.

Error messages that used to go to stdout now go to stderr.

Author: Ariel J Bernal <ariel.j.bernal@intel.com>
llvm-svn: 177177

Rollback r177173. Some OSs may not have ptrace extensions which lldb expects when building. This needs to be accounted for.

llvm-svn: 177176

llvm-svn: 177175

-adds icc to the lit of compilers to run the tests
-adds icc test decorators
-skip TestAnonymous.py for icc

Patch by Ashok Thirumurthi.

llvm-svn: 177174

Patch by Ashok Thirumurthi.

llvm-svn: 177173

llvm-svn: 177172

Temporarily disabled non-code-running summaries for CF*Dictionary and NSCountedSet

llvm-svn: 177171

I was too pessimistic in r177105. Vector selects that fit into a legal register
type lower just fine. I was mislead by the code fragment that I was using. The
stores/loads that I saw in those cases came from lowering the conditional off
an address.

Changing the code fragment to:

%T0_3 = type <8 x i18>
%T1_3 = type <8 x i1>

define void @func_blend3(%T0_3* %loadaddr, %T0_3* %loadaddr2,
                         %T1_3* %blend, %T0_3* %storeaddr) {
  %v0 = load %T0_3* %loadaddr
  %v1 = load %T0_3* %loadaddr2
==> FROM:
  ;%c = load %T1_3* %blend
==> TO:
  %c = icmp slt %T0_3 %v0, %v1
==> USE:
  %r = select %T1_3 %c, %T0_3 %v0, %T0_3 %v1

  store %T0_3 %r, %T0_3* %storeaddr
  ret void
}

revealed this mistake.

radar://13403975

llvm-svn: 177170

Adding an A15 specific optimization pass for interactions between S/D/Q registers. The pass handles all the required transformations pre-regalloc.

llvm-svn: 177169

The Use-Nullptr transform was replacing nullptr_t-typed expressions because in
the AST such expressions have an implicit NullToPointer cast around them. Now
the transform ignores these expressions.

Fixes PR15414.

llvm-svn: 177168

Fixes PR15520.

llvm-svn: 177167