Re-commit r220667.

C++ source given to check_cxx_source_compile should have define "main".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220669 91177308-0d34-0410-b5e6-96231b3b80d8
[asan-asm-instrumentation] Added comment describing how asm instrumentation works.

Summary: [asan-asm-instrumentation] Added comment describing how asm instrumentation works.

Reviewers: eugenis

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5970

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220670 91177308-0d34-0410-b5e6-96231b3b80d8
[ARM] Select VMAXNM and VMINNM regardless of operand order

Currently, the ARM backend will select the VMAXNM and VMINNM for these C
expressions:
  (a < b) ? a : b
  (a > b) ? a : b
but not these expressions:
  (a > b) ? b : a
  (a < b) ? b : a

This patch allows all of these expressions to be matched.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220671 91177308-0d34-0410-b5e6-96231b3b80d8
Prune CRLF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220678 91177308-0d34-0410-b5e6-96231b3b80d8
Add MapVector::rbegin(), MapVector::rend() to completment MapVector::begin(), MapVector::end().

These just delegate to the underlying vector type in the MapVector.

Also just add in some sanity unittests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220687 91177308-0d34-0410-b5e6-96231b3b80d8
[PBQP] Unique allowed-sets for nodes in the PBQP graph and use pairs of these
sets as keys into a cache of interference matrice values in the Interference
constraint adder.

Creating interference matrices was one of the large remaining time-sinks in
PBQP. Caching them reduces the total compile time (when using PBQP) on the
nightly test suite by ~10%.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220688 91177308-0d34-0410-b5e6-96231b3b80d8
[PBQP] Clarify ambiguous-looking typedef.

This was causing an error on the hexagon bots.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220689 91177308-0d34-0410-b5e6-96231b3b80d8
[PBQP] Remove a spurious 'typename' keyword. This was causing an error on MSVC.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220690 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] experimental tracing for indirect calls, llvm part.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220699 91177308-0d34-0410-b5e6-96231b3b80d8
[FastISel][AArch64] Fix load/store with frame indices.

At higher optimization levels the LLVM IR may contain more complex patterns for
loads/stores from/to frame indices. The 'computeAddress' function wasn't able to
handle this and triggered an assertion.

This fix extends the possible addressing modes for frame indices.

This fixes rdar://problem/18783298.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220700 91177308-0d34-0410-b5e6-96231b3b80d8
[FastISel][AArch64] Don't fold the 'and' instruction into the 'tbz/tbnz' instruction if it is in a different basic block.

This fixes a bug where the input register was not defined for the 'tbz/tbnz'
instruction. This happened, because we folded the 'and' instruction from a
different basic block.

This fixes rdar://problem/18784013.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220704 91177308-0d34-0410-b5e6-96231b3b80d8
[FastISel][AArch64] Use 'cbz' also for null values (pointers).

The pattern matching for a 'ConstantInt' value was too restrictive. Checking for
a 'Constant' with a bull value is sufficient for using an 'cbz/cbnz' instruction.

This fixes rdar://problem/18784732.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220709 91177308-0d34-0410-b5e6-96231b3b80d8
Stackmap shadows should consider call returns a branch target.

To avoid emitting too many nops, a stackmap shadow can include emitted instructions in the shadow, but these must not include branch targets.

A return from a call should count as a branch target as patching over the instructions after the call would lead to incorrect behaviour for threads currently making that call, when they return.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220710 91177308-0d34-0410-b5e6-96231b3b80d8
[FastISel][AArch64] Optimize compare-and-branch for i1 to use 'tbz'.

Minor enhancement to use 'tbz' for i1 compare-and-branch to get rid of an 'and'
instruction.

This fixes rdar://problem/18784953.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220712 91177308-0d34-0410-b5e6-96231b3b80d8
[FastISel][AArch64] Emit immediate version of icmp (subs) for null pointer check.

This is a minor change to use the immediate version when the operand is a null
value. This should get rid of an unnecessary 'mov' instruction in debug
builds and align the code more with the one generated by SelectionDAG.

This fixes rdar://problem/18785125.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220713 91177308-0d34-0410-b5e6-96231b3b80d8
Fix bug where sys::Wait could wait on wrong pid.

Setting ChildPid to -1 would cause waitpid to wait for any child process.

Patch by Daniel Reynaud!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220717 91177308-0d34-0410-b5e6-96231b3b80d8
[ScalarEvolution] Guard dump() with #if

to be consistent with its definition in ScalarEvolution.cpp


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220721 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a stackmap bug introduced in r220710.

For a call to not return in to the stackmap shadow, the shadow must end with the call.

To do this, we must insert any required nops *before* the call, and not after it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220728 91177308-0d34-0410-b5e6-96231b3b80d8
Make it easier to pass a custom diagnostic handler to the IR linker.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220732 91177308-0d34-0410-b5e6-96231b3b80d8
[AVX512] Fix copy-and-paste bugs in vpermil

1) i512mem -> f512mem (this is the packed FP input being permuted)
2) element size is 64 bits in EVEX_CD8 for PD.

(A good illustration why X86VectorVTInfo is useful)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220734 91177308-0d34-0410-b5e6-96231b3b80d8