DebugInfo: Remove dead code, DICompositeType::addMember(DIDescriptor D)

It's no longer necessary to lazily add members to the DICompositeType
member list. Instead any lazy members (special member functions and
member template instantiations) are added to the parent late based on
their context link, the same way that nested types have always been
handled (never being in the member list - just added to the parent DIE
lazily based on context).

Clang's been updated not to use this function anymore as it improves
type unit consistency by never emitting lazy members in type units.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198079 91177308-0d34-0410-b5e6-96231b3b80d8
Teach DAGCombiner how to fold a SIGN_EXTEND_INREG of a BUILD_VECTOR of
ConstantSDNodes (or UNDEFs) into a simple BUILD_VECTOR.

For example, given the following sequence of dag nodes:

  i32 C = Constant<1>
  v4i32 V = BUILD_VECTOR C, C, C, C
  v4i32 Result = SIGN_EXTEND_INREG V, ValueType:v4i1

The SIGN_EXTEND_INREG node can be folded into a build_vector since
the vector in input is a BUILD_VECTOR of constants.

The optimized sequence is:

  i32 C = Constant<-1>
  v4i32 Result = BUILD_VECTOR C, C, C, C



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198084 91177308-0d34-0410-b5e6-96231b3b80d8
Strip dead code when linking by default with BFD ld (linux, ...) and ld64 (os x).

This reduces the size of clang-format from 22 MB to 1.8 MB, diagtool goes from
21 MB to 2.8 MB, libclang.so goes from 29 MB to 20 MB, etc.  The size of the
bin/ folder shrinks from 270 MB to 200 MB.

Targets that support plugins and don't already use EXPORTED_SYMBOL_FILE
(which libclang and libLTO already do) can set NO_DEAD_STRIP to opt out.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198087 91177308-0d34-0410-b5e6-96231b3b80d8
Attempt to fix JIT unit tests after r198087.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198089 91177308-0d34-0410-b5e6-96231b3b80d8
Remove AsmPrinter::needsRelocationsForDwarfStringPool() since it's
just calling into MAI and is only abstracting for a single interface that
we actually need to check in multiple places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198092 91177308-0d34-0410-b5e6-96231b3b80d8
Disable transforms that introduce calls to exp10*() on Linux due to
widespread glibc bugs.

The glibc implementation of exp10 has a very serious precision bug in
version 2.15 (and older versions). This is still very widely used (the
current Ubuntu LTS for example uses it) and so it isn't reasonable to
make transforms that produce these functions. This fixes many
miscompiles introduced when we started transforming pow(10.0, ...) into
exp10, and it may have fixed other latent miscompiles where exp10
provided sufficient precision but exp10f did not.

This is all really horrible. The primary bug has been fixed for over
a year and glibc 2.18 works correctly for the test cases I have, but it
will be 2017 before the LTS using 2.15 is no longer supported by Ubuntu
(and thus reasonable for folks to be relying on). =[ We're either going
to need to live without these optimizations, or find a way to switch
behavior more dynamically than using simply the fact that the OS is
"Linux".

To make matters worse, there appears to be significant testing and
fixing of numerous other bugs in the exp10 family of functions right now
in glibc. While those haven't been causing problems I've seen in the
wild, it gives me concerns that we may need to wait until an even later
release of glibc before we can reliably transform code into exp10.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198093 91177308-0d34-0410-b5e6-96231b3b80d8
ARMAsmParser: fix typo in comment

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198095 91177308-0d34-0410-b5e6-96231b3b80d8
IAS: support .rep as an alias for .rept

The GNU assembler supports .rep as an alias for .rept.  This simply creates the
alias for it and introduces a test for both .rept and .rep.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198097 91177308-0d34-0410-b5e6-96231b3b80d8
AsmParser: cleanup diagnostics for .rep/.rept

Avoid double diagnostics for invalid expressions for count.  Improve caret
location for negative count.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198099 91177308-0d34-0410-b5e6-96231b3b80d8
[X86] Teach the backend how to fold target specific dag node for packed
vector shift by immedate count (VSHLI/VSRLI/VSRAI) into a build_vector when
the vector in input to the shift is a build_vector of all constants or UNDEFs.

Target specific nodes for packed shifts by immediate count are in
general introduced by function 'getTargetVShiftByConstNode' (in
X86ISelLowering.cpp) when lowering shift operations, SSE/AVX immediate
shift intrinsics and (only in very few cases) SIGN_EXTEND_INREG dag
nodes.

This patch adds extra rules for simplifying vector shifts inside
function 'getTargetVShiftByConstNode'.

Added file test/CodeGen/X86/vec_shift5.ll to verify that packed
shifts by immediate are correctly folded into a build_vector when the
input vector to the shift dag node is a vector of constants or undefs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198113 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/CodeGen/X86/vselect.ll: Unbreak Windows x64 targets to add -mtriple=x86_64-unknown-unknown.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198114 91177308-0d34-0410-b5e6-96231b3b80d8
Mark some Type and EVT methods as LLVM_READONLY.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198115 91177308-0d34-0410-b5e6-96231b3b80d8
Minor indentation fix to match other switch statements. Change llvm_unreachable text to match similar places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198116 91177308-0d34-0410-b5e6-96231b3b80d8
Use getSimpleValueType in a few spots where the type should be simple.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198117 91177308-0d34-0410-b5e6-96231b3b80d8
Revert part of r198115 to see if it fixes a buildbot failure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198118 91177308-0d34-0410-b5e6-96231b3b80d8
Factor MI-Sched in preparation for post-ra scheduling support.

Factor the MachineFunctionPass into MachineSchedulerBase.

Split the DAG class into ScheduleDAGMI and SchedulerDAGMILive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198119 91177308-0d34-0410-b5e6-96231b3b80d8
Stub out a PostMachineScheduler pass.

Placeholder and boilerplate for a PostRA MachineScheduler pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198120 91177308-0d34-0410-b5e6-96231b3b80d8
Move the PostRA scheduler's fixupKills function for reuse.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198121 91177308-0d34-0410-b5e6-96231b3b80d8
Add a PostMachineScheduler pass with generic implementation.

PostGenericScheduler uses either the new machine model or the hazard
checker for top-down scheduling. Most of the infrastructure for PreRA
machine scheduling is reused.

With a some tuning, this should allow MachineScheduler to be default
for all ARM targets, including cortex-A9, using the new machine
model. Likewise, with additional tuning, it should be able to replace
PostRAScheduler for all targets.

The PostMachineScheduler pass does not currently run the
AntiDepBreaker. There is less need for it on targets that are already
running preRA MachineScheduler. I want to prove it's necessary before
committing to the maintenance burden.

The PostMachineScheduler also currently removes kill flags and adds
them all back later. This is a bit ridiculous. I'd prefer passes to
directly use a liveness utility than rely on flags.

A test case that enables this scheduler will be included in a
subsequent checkin that updates the A9 model.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198122 91177308-0d34-0410-b5e6-96231b3b80d8
The Cortex-A9 machine model is incomplete. Mark it as such.

Many vector operations never had itineraries. Since the new machine
model was a mapping from existing itinerary classes, we don't have a
model for these. We still want to migrate A9 even though no one has
invested in a complete model, so mark it incomplete to avoid the
scheduler asserting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198123 91177308-0d34-0410-b5e6-96231b3b80d8