llvm-gcc is dead. REALLY. IT'S DEAD JIM.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199178 91177308-0d34-0410-b5e6-96231b3b80d8
Ok, really, for the last time, llvm-gcc is dead Jim.

Also, so is stacker, llvm-tv, etc. Wow.

But will someone please fess up to what projects/privbracket is and why
our autoconf build supports it?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199179 91177308-0d34-0410-b5e6-96231b3b80d8
Fix llc to not reuse spill slots in functions that invoke setjmp()

We need to ensure that StackSlotColoring.cpp does not reuse stack
spill slots in functions that call "returns_twice" functions such as
setjmp(), otherwise this can lead to miscompiled code, because a stack
slot would be clobbered when it's still live.

This was already handled correctly for functions that call setjmp()
(though this wasn't covered by a test), but not for functions that
invoke setjmp().

We fix this by changing callsFunctionThatReturnsTwice() to check for
invoke instructions.

This fixes PR18244.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199180 91177308-0d34-0410-b5e6-96231b3b80d8
Replace .mips_hack_stocg with ".set micromips" and ".set nomicromips".

This matches what gnu as does and implementing this is easier than arguing
about it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199181 91177308-0d34-0410-b5e6-96231b3b80d8
Add checks to configure for sufficiently modern host compilers. This
requires Clang 3.1 or GCC 4.7. If the compiler isn't Clang or GCC, we
don't try to do any sanity checking, but this give us at least
a reasonable baseline of modern compilers.

Also, I'm not claiming that this is the best way to do compiler version
tests. I'm happy for anyone to suggest better ways of doing this test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199182 91177308-0d34-0410-b5e6-96231b3b80d8
Remove the last weird subproject, 'privbracket'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199183 91177308-0d34-0410-b5e6-96231b3b80d8
[PM] Fix stale header blocker, found by Duncan Smith in code review!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199185 91177308-0d34-0410-b5e6-96231b3b80d8
Switch the NEON register class from QPR to DPair.

The already allocatable DPair superclass contains odd-even D register
pair in addition to the even-odd pairs in the QPR register class. There
is no reason to constrain the set of D register pairs that can be used
for NEON values. Any NEON instructions that require a Q register will
automatically constrain the register class to QPR.

The allocation order for DPair begins with the QPR registers, so
register allocation is unlikely to change much.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199186 91177308-0d34-0410-b5e6-96231b3b80d8
Always let value types influence register classes.

When creating a virtual register for a def, the value type should be
used to pick the register class. If we only use the register class
constraint on the instruction, we might pick a too large register class.

Some registers can store values of different sizes. For example, the x86
xmm registers can hold f32, f64, and 128-bit vectors. The three
different value sizes are represented by register classes with identical
register sets: FR32, FR64, and VR128. These register classes have
different spill slot sizes, so it is important to use the right one.

The register class constraint on an instruction doesn't necessarily care
about the size of the value its defining. The value type determines
that.

This fixes a problem where InstrEmitter was picking 32-bit register
classes for 64-bit values on SPARC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199187 91177308-0d34-0410-b5e6-96231b3b80d8
LTO: add API to set strategy for -internalize

Add API to LTOCodeGenerator to specify a strategy for the -internalize
pass.

This is a new attempt at Bill's change in r185882, which he reverted in
r188029 due to problems with the gold linker.  This puts the onus on the
linker to decide whether (and what) to internalize.

In particular, running internalize before outputting an object file may
change a 'weak' symbol into an internal one, even though that symbol
could be needed by an external object file --- e.g., with arclite.

This patch enables three strategies:

- LTO_INTERNALIZE_FULL: the default (and the old behaviour).
- LTO_INTERNALIZE_NONE: skip -internalize.
- LTO_INTERNALIZE_HIDDEN: only -internalize symbols with hidden
  visibility.

LTO_INTERNALIZE_FULL should be used when linking an executable.

Outputting an object file (e.g., via ld -r) is more complicated, and
depends on whether hidden symbols should be internalized.  E.g., for
ld -r, LTO_INTERNALIZE_NONE can be used when -keep_private_externs, and
LTO_INTERNALIZE_HIDDEN can be used otherwise.  However,
LTO_INTERNALIZE_FULL is inappropriate, since the output object file will
eventually need to link with others.

lto_codegen_set_internalize_strategy() sets the strategy for subsequent
calls to lto_codegen_write_merged_modules() and lto_codegen_compile*().

<rdar://problem/14334895>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199191 91177308-0d34-0410-b5e6-96231b3b80d8
Separate the concept of 16-bit/32-bit operand size controlled by 0x66 prefix and the current mode from the concept of SSE instructions using 0x66 prefix as part of their encoding without being affected by the mode.

This should allow SSE instructions to be encoded correctly in 16-bit mode which r198586 probably broke.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199193 91177308-0d34-0410-b5e6-96231b3b80d8
Remove stray comma in enum to satisfy -Wpedantic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199194 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r199191, "LTO: add API to set strategy for -internalize"

Please update also Other/link-opts.ll, in next time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199197 91177308-0d34-0410-b5e6-96231b3b80d8
Fix fastcall mangling of dllimported symbols

fastcall requires @ as global prefix instead of _ but getNameWithPrefix
wrongly assumes the OutName buffer is empty and replaces at index 0.
For imported functions this buffer is pre-filled with "__imp_" resulting
in broken "@_imp_foo@0" mangling.

Instead replace at the proper index. We also never have to prepend the
@-prefix because this fastcall mangling is only used on 32-bit Windows
targets which have _ has global prefix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199203 91177308-0d34-0410-b5e6-96231b3b80d8
Decouple dllexport/dllimport from linkage

Representing dllexport/dllimport as distinct linkage types prevents using
these attributes on templates and inline functions.

Instead of introducing further mixed linkage types to include linkonce and
weak ODR, the old import/export linkage types are replaced with a new
separate visibility-like specifier:

  define available_externally dllimport void @f() {}
  @Var = dllexport global i32 1, align 4

Linkage for dllexported globals and functions is now equal to their linkage
without dllexport. Imported globals and functions must be either
declarations with external linkage, or definitions with
AvailableExternallyLinkage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199204 91177308-0d34-0410-b5e6-96231b3b80d8
Handle dllexport for global aliases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199205 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Handle dllexport for global aliases"

This reverts commit r199205.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199206 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Decouple dllexport/dllimport from linkage"

Revert this for now until I fix an issue in Clang with it.

This reverts commit r199204.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199207 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: remove unused UMAALv5 node

It was incorrect anyway, since it didn't have accumulator inputs and wasn't
even supported on v5.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199211 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: add constraint that RdLo != Rn != RdHi for v5 MLA insts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199212 91177308-0d34-0410-b5e6-96231b3b80d8