reimplement Constant::ContainsRelocations as
Constant::getRelocationInfo(), which has a much simpler
to use API.  It still should not be part of libvmcore, but
is better than it was.  Also teach it to be smart about
hidden visibility.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76700 91177308-0d34-0410-b5e6-96231b3b80d8

Misc. doc fixes following suggestions from Eli.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76699 91177308-0d34-0410-b5e6-96231b3b80d8

Fixing cp island pass. Step 1: Determine whether the constant pool offset can be
negative on an individual bases rather than basing on whether it's in thumb
mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76698 91177308-0d34-0410-b5e6-96231b3b80d8

Fix comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76693 91177308-0d34-0410-b5e6-96231b3b80d8

simplify code now that it is inlined.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76689 91177308-0d34-0410-b5e6-96231b3b80d8

Exposed PHIElimination pass within CodeGen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76688 91177308-0d34-0410-b5e6-96231b3b80d8

Now that RelocBehaviour() is never overloaded, it doesn't need to be
virtual.  Just inline it into its two current call sites in preparation
for simplifying the code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76686 91177308-0d34-0410-b5e6-96231b3b80d8

Add intrinsic for __builtin_ia32_vec_set_v4si which turns out to be
pinsrd in sse4.1.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76684 91177308-0d34-0410-b5e6-96231b3b80d8

this doesn't break any of the 4 ia64 tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76683 91177308-0d34-0410-b5e6-96231b3b80d8

alpha doesn't need to redefine this: it only supports PIC codegen anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76682 91177308-0d34-0410-b5e6-96231b3b80d8

Add some support for iterative coalescers to calculate a joined live
range's weight properly.  This is turned off right now in the sense that
you'll get an assert if you get into a situation that can only be caused
by an iterative coalescer.  All other code paths operate exactly as
before so there is no functional change with this patch.  The asserts
should be disabled if/when an iterative coalescer gets added to trunk.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76680 91177308-0d34-0410-b5e6-96231b3b80d8

no really, I can spell!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76679 91177308-0d34-0410-b5e6-96231b3b80d8

add an API so target-independent codegen can determine if a constant
pool entry will require relocations against it.  I implemented this
conservatively for ARM, someone who is knowledgable about it should
see if this can be improved.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76678 91177308-0d34-0410-b5e6-96231b3b80d8

Convert instcombine from using using getAnalysis<TargetData> to
getAnalysisIfAvailable<TargetData>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76676 91177308-0d34-0410-b5e6-96231b3b80d8

Permit the IntPtrTy argument to isEliminableCastPair to be null,
to help support use when TargetData is not available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76675 91177308-0d34-0410-b5e6-96231b3b80d8

fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76674 91177308-0d34-0410-b5e6-96231b3b80d8

Change ELFCodeEmitter logic to emit the constant pool and jump tables to
their appropriate sections before the code itself. They need to be emitted
before the function because on some targets (x86 but not x86_64) the later
may reference a JT or CP entry address

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76672 91177308-0d34-0410-b5e6-96231b3b80d8

Replace the original ad-hoc code for determining whether (v pred w) implies
(x pred y) with more thorough code that does more complete canonicalization
before resorting to range checks. This helps it find more cases where
the canonicalized expressions match.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76671 91177308-0d34-0410-b5e6-96231b3b80d8

Remove a big test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76669 91177308-0d34-0410-b5e6-96231b3b80d8

Various doc updates from Edward O'Callaghan!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76668 91177308-0d34-0410-b5e6-96231b3b80d8

remove the last bits of SectionFlagsForGlobal.  There is some flag here that
depends on XS1A, but I think the ReadOnlySection is already set up for this
and there is no testcase that this breaks.  If this is really needed, we can
add the appropriate parameterization to TargetAsmInfo in the future to support
this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76667 91177308-0d34-0410-b5e6-96231b3b80d8

don't mask out the small flag and then reapply it later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76666 91177308-0d34-0410-b5e6-96231b3b80d8

if Xcore doesn't support TLS, it doesn't have to worry about thread local LLVM IR, it should be rejected by a front-end.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76665 91177308-0d34-0410-b5e6-96231b3b80d8

remove the Xcore implementation of SelectSectionForGlobal.  While you have
to twist your brain to see it, I believe it is the same as ELFTargetAsmInfo::SelectSectionForGlobal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76664 91177308-0d34-0410-b5e6-96231b3b80d8

simplify based on the fact that darwin always uses L/l.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76662 91177308-0d34-0410-b5e6-96231b3b80d8

make some stuff private.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76661 91177308-0d34-0410-b5e6-96231b3b80d8

improve comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76660 91177308-0d34-0410-b5e6-96231b3b80d8

Remove the XCore custom implementation of MergeableConstSection, relying on
the generic ELF version instead.  This will result in its mergable constant
sections getting named ".rodata.cst4" instead of ".cp.const4", but the
linker looks at the section flags, not the name of the section AFAICT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76659 91177308-0d34-0410-b5e6-96231b3b80d8

Fix ocaml tests for 64-bit MacOS systems.  LLVM is currently built
as 32-bit code by default, and if gcc defaults to 64-bit code then ocamlc
requires a -cc "gcc -arch i386" option.  We were hardcoding -cc g++
and throwing away any other compiler options that were determined when
ocamlc was configured and built.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76658 91177308-0d34-0410-b5e6-96231b3b80d8

Reorder the "Metadata" entry to match the C bindings.
This fixes a regression in the vmcore.ml dejagnu test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76657 91177308-0d34-0410-b5e6-96231b3b80d8

Add missing include

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76655 91177308-0d34-0410-b5e6-96231b3b80d8

inline a trivial method into its only call site and fix indentation of cases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76654 91177308-0d34-0410-b5e6-96231b3b80d8

Remove some overridden functions in XCoreTargetAsmInfo that are
implemented exactly the same way as its ELFTargetAsmInfo subclass
has them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76653 91177308-0d34-0410-b5e6-96231b3b80d8

revert r76602, 76603, and r76615, pending design discussions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76646 91177308-0d34-0410-b5e6-96231b3b80d8

minor cleanups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76645 91177308-0d34-0410-b5e6-96231b3b80d8

Privatize the ConstantArray table.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76639 91177308-0d34-0410-b5e6-96231b3b80d8

Add a few fairly obvious API changes I noticed while porting some old code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76636 91177308-0d34-0410-b5e6-96231b3b80d8

Missed a piece of the commit to remove the shift flavor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76635 91177308-0d34-0410-b5e6-96231b3b80d8

Privatize the first of the value maps.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76634 91177308-0d34-0410-b5e6-96231b3b80d8

Remove shift amount flavor.  It isn't actually complete enough to
be useful, and it's currently unused.  (Some issues: it isn't actually
rich enough to capture the semantics on many architectures, and
semantics can vary depending on the type being shifted.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76633 91177308-0d34-0410-b5e6-96231b3b80d8

Remove a couple of already-implemented notes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76631 91177308-0d34-0410-b5e6-96231b3b80d8

80 col violation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76629 91177308-0d34-0410-b5e6-96231b3b80d8

Prefix IR dumps with LiveInterval indices when possible.  This turns
this:

%ESI<def> = MOV32rr %EDI<kill>
ADJCALLSTACKDOWN64 0, %RSP<imp-def>, %EFLAGS<imp-def,dead>, %RSP<imp-use>
%reg1027<def> = MOVZX64rr32 %ESI
%reg1027<def> = ADD64ri8 %reg1027, 15, %EFLAGS<imp-def,dead>
%reg1027<def> = AND64ri8 %reg1027, -16, %EFLAGS<imp-def,dead>
%RDI<def> = MOV64rr %RSP
%RDI<def> = SUB64rr %RDI, %reg1027<kill>, %EFLAGS<imp-def,dead>
%RSP<def> = MOV64rr %RDI

into this:

4 %reg1024<def> = MOV32rr %EDI<kill>
12 ADJCALLSTACKDOWN64 0, %RSP<imp-def>, %EFLAGS<imp-def,dead>, %RSP<imp-use>
20 %reg1025<def> = MOVZX64rr32 %reg1024
28 %reg1026<def> = MOV64rr %reg1025<kill>
36 %reg1026<def> = ADD64ri8 %reg1026, 15, %EFLAGS<imp-def,dead>
44 %reg1027<def> = MOV64rr %reg1026<kill>
52 %reg1027<def> = AND64ri8 %reg1027, -16, %EFLAGS<imp-def,dead>
60 %reg1028<def> = MOV64rr %RSP
68 %reg1029<def> = MOV64rr %reg1028<kill>
76 %reg1029<def> = SUB64rr %reg1029, %reg1027<kill>, %EFLAGS<imp-def,dead>
84 %RSP<def> = MOV64rr %reg1029

This helps greatly when debugging register allocation and coalescing
problems.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76615 91177308-0d34-0410-b5e6-96231b3b80d8

Add fake v7 itineraries for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76612 91177308-0d34-0410-b5e6-96231b3b80d8

make AsmPrinter::doFinalization iterate over the global variables
and call PrintGlobalVariable, allowing elimination and simplification
of various targets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76604 91177308-0d34-0410-b5e6-96231b3b80d8

Add PrefixPrinter arguments to the dump routines for MachineFunction and
MachineBasicBlock.  We'll use these shortly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76603 91177308-0d34-0410-b5e6-96231b3b80d8

Add a small utility class to configure IR printers.  This will allow
printers to do neat and wonderful things when printing debug
information.  The ideas is to allow passes to configer printers to emit
pass-specific information when dumping IR.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76602 91177308-0d34-0410-b5e6-96231b3b80d8

Make a bunch of changes suggested by Chris and others to improve
efficiency.  Fix a few formatting bugs along the way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76601 91177308-0d34-0410-b5e6-96231b3b80d8

Do not select tSXTB / tSXTH in thumb2 mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76600 91177308-0d34-0410-b5e6-96231b3b80d8

Rename getConstantInt{True|False} to get{True|False} at Chris' behest.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76598 91177308-0d34-0410-b5e6-96231b3b80d8

Add freed memory poisoning in !NDEBUG mode for DenseMap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76597 91177308-0d34-0410-b5e6-96231b3b80d8

reduce indentation by using an early exit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76596 91177308-0d34-0410-b5e6-96231b3b80d8

Update CMake files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76595 91177308-0d34-0410-b5e6-96231b3b80d8

Use string comparison instead of numeric comparison when comparing digests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76594 91177308-0d34-0410-b5e6-96231b3b80d8

whitespace cleanups, make the MipsAsmPrinter::doInitialization
chain to the super class instead of initializing mangler directly.
This gives it .file and module level inline asm support among other
things.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76593 91177308-0d34-0410-b5e6-96231b3b80d8

fix Sparc, SystemZ, and MSP430 to not override AsmPrinter::doInitialization.
This eliminates redundancy setting up the mangler and adds support to them
for module-level inline asm and a .file directive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76592 91177308-0d34-0410-b5e6-96231b3b80d8

convert this test to filecheck format, which is faster and avoids false matches of "st" -> "stdin"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76591 91177308-0d34-0410-b5e6-96231b3b80d8

Rename LessPrivateGlobalPrefix -> LinkerPrivateGlobalPrefix to match the
LLVM IR concept.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76590 91177308-0d34-0410-b5e6-96231b3b80d8

Move StringRef comparison operators out of class.

Also, tweak the return type of size().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76588 91177308-0d34-0410-b5e6-96231b3b80d8

fix indentation

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76587 91177308-0d34-0410-b5e6-96231b3b80d8

remove an unneeded override.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76586 91177308-0d34-0410-b5e6-96231b3b80d8

more random whitespace cleanup, eliminate #define, avoid copying
vectors needlessly, doxygenify comments, improve constness, etc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76585 91177308-0d34-0410-b5e6-96231b3b80d8

add a testcase for the pic16 section handling stuff.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76579 91177308-0d34-0410-b5e6-96231b3b80d8

some simple whitespace cleanup, avoid copying vectors for no reason
as much, etc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76578 91177308-0d34-0410-b5e6-96231b3b80d8

Add StringRef::{substr, startswith}.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76559 91177308-0d34-0410-b5e6-96231b3b80d8

Another rewriter bug exposed by recent coalescer changes. ReuseInfo::GetRegForReload() should make sure the "switched" register is in the desired register class. I'm surprised this hasn't caused more failures in the past.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76558 91177308-0d34-0410-b5e6-96231b3b80d8

Add missing include.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76555 91177308-0d34-0410-b5e6-96231b3b80d8

Switch this API to StringRef.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76554 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify / normalize some uses of Value::getName.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76553 91177308-0d34-0410-b5e6-96231b3b80d8

Add StringRef class, with fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76543 91177308-0d34-0410-b5e6-96231b3b80d8

unbreak unit-tests on gcc-4.4.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76542 91177308-0d34-0410-b5e6-96231b3b80d8

Remove some unused code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76541 91177308-0d34-0410-b5e6-96231b3b80d8

Support adding relocations for data sections, handling the cases where
global declared symbols are initialized with references from other global
symbols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76540 91177308-0d34-0410-b5e6-96231b3b80d8

remove a very large testcase for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76537 91177308-0d34-0410-b5e6-96231b3b80d8

Add jumps with 8-bit relocation for assembler / disassembler. Patch by Sean Callanan.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76536 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a dagga combiner bug: avoid creating illegal constant.

Is this really a winning transformation?
fold (shl (srl x, c1), c2) -> (shl (and x, (shl -1, c1)), (sub c2, c1)) or
                              (srl (and x, (shl -1, c1)), (sub c1, c2))

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76535 91177308-0d34-0410-b5e6-96231b3b80d8

Move a bit more state over to the LLVMContext.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76533 91177308-0d34-0410-b5e6-96231b3b80d8

Add the following functions:

- SYSCALL (normal fast system call instruction) [0f 05]
- SYSENTER (system call entry instruction) [0f 34]
- SYSEXIT (system call exit instruction) [0f 35]
- SYSEXIT64 (system call exit instruction to 64-bit user code) [REX.W 0f 35]
- SYSRET (system call return instruction) [0f 07]

Patch by Sean Callanan.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76528 91177308-0d34-0410-b5e6-96231b3b80d8

Add a testcase for PR2831.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76527 91177308-0d34-0410-b5e6-96231b3b80d8

Add a testcase for PR4569, which is now fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76526 91177308-0d34-0410-b5e6-96231b3b80d8

Add an svn:ignore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76525 91177308-0d34-0410-b5e6-96231b3b80d8

Make the range calculations for addrecs to be more conservative,
as they aren't currently prepared to handle complicated overflow
cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76524 91177308-0d34-0410-b5e6-96231b3b80d8

Whitespace cleanups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76523 91177308-0d34-0410-b5e6-96231b3b80d8

Minor code simplification.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76521 91177308-0d34-0410-b5e6-96231b3b80d8

Fix ARM isle code that optimize multiply by constants which are power-of-2 +/- 1.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76520 91177308-0d34-0410-b5e6-96231b3b80d8

Cross RC coalescing is now on by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76519 91177308-0d34-0410-b5e6-96231b3b80d8

revert 76503 while I figure out what's going on

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76517 91177308-0d34-0410-b5e6-96231b3b80d8

Add a comment to clarify why there isn't any code in this spot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76505 91177308-0d34-0410-b5e6-96231b3b80d8

Remove the code that tried to evaluate whether (A pred B) is known
by determining if (B pred (B-A)) is known, as it doesn't handle
overflow correctly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76504 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure a global matching asm 'i' constraint gets its
flags set properly.  (hasMemory is clearly irrelevant
when matching 'i', I don't understand what this was
supposed to be doing.)
gcc.apple/asm-block-25.c (test passed before by
accident, but generated code was wrong)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76503 91177308-0d34-0410-b5e6-96231b3b80d8

Move stripping of bitcasts in inline asm arguments
to a place where it affects everything.  Occurs
only on calls AFAIK.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76502 91177308-0d34-0410-b5e6-96231b3b80d8

Minor code simplification.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76496 91177308-0d34-0410-b5e6-96231b3b80d8

Documentation for the new non-overflow and exact keywords.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76495 91177308-0d34-0410-b5e6-96231b3b80d8

The upper argument of ConstantRange is exclusive, not inclusive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76492 91177308-0d34-0410-b5e6-96231b3b80d8

clean up some formatting, indent by 2 instead of 4.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76490 91177308-0d34-0410-b5e6-96231b3b80d8

CMP and TST define CPSR, not use it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76489 91177308-0d34-0410-b5e6-96231b3b80d8

Re-apply 75490, 75806 and 76177 with fixes and tests.  Efficiency comes
next.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76486 91177308-0d34-0410-b5e6-96231b3b80d8

Forgot this test earlier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76485 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify the code in DarwinTargetAsmInfo::emitUsedDirectiveFor so that humans can understand it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76480 91177308-0d34-0410-b5e6-96231b3b80d8

Pass in the unfortunately named "LessPrivatePrefix" for the
"LinkerPrivatePrefix". It seems to have been used in only one place before I
started this "linker_private" business. I'm thinking that a rename is in
order...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76479 91177308-0d34-0410-b5e6-96231b3b80d8