AArch64: remove unnecessary check that RS is valid

AArch64 always demands a register-scavenger, so the pointer should never be
NULL. However, in the spirit of paranoia, we'll assert it before use just in
case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180080 91177308-0d34-0410-b5e6-96231b3b80d8
Refuse to (even try to) vectorize loops which have uniform writes,
even if erroneously annotated with the parallel loop metadata.

Fixes Bug 15794: 
"Loop Vectorizer: Crashes with the use of llvm.loop.parallel metadata"



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180081 91177308-0d34-0410-b5e6-96231b3b80d8
Add basic zlib support to LLVM. This would allow to use compression/uncompression in selected LLVM tools.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180083 91177308-0d34-0410-b5e6-96231b3b80d8
Add more guards around zlib-dependent code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180084 91177308-0d34-0410-b5e6-96231b3b80d8
Add llvm_unreachable after fully covered switch to pacify GCC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180087 91177308-0d34-0410-b5e6-96231b3b80d8
Use zlib to uncompress debug sections in DWARF parser.

This makes llvm-dwarfdump and llvm-symbolizer understand
debug info sections compressed by ld.gold linker.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180088 91177308-0d34-0410-b5e6-96231b3b80d8
Move test from grep to FileCheck.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180092 91177308-0d34-0410-b5e6-96231b3b80d8
Tell MSan that memory initialized by libz is valid

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180094 91177308-0d34-0410-b5e6-96231b3b80d8
Un-revert the environ copy in ProgramTest after fixing it on OS X

This was r180041 and r180046, which was reverted in r180066.
Re-committing this should fix the dragonegg bootstrap, which I presume
needs LD_LIBRARY_PATH to be propagated to the child.

Tested on Linux, Windows, and Mac OS 10.6.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180099 91177308-0d34-0410-b5e6-96231b3b80d8
Expose IRBuilder::CreateAtomicRMW as LLVMBuildAtomicRMW in llvm-c.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180100 91177308-0d34-0410-b5e6-96231b3b80d8
Fixup for r180094: properly use MSan interface functions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180103 91177308-0d34-0410-b5e6-96231b3b80d8
c vs c++ mistake in header file typedef for AtomicRMW fix in rev 180100.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180104 91177308-0d34-0410-b5e6-96231b3b80d8
Wrap.h: Define wrap / unwrap function for ExecutionEngine

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180112 91177308-0d34-0410-b5e6-96231b3b80d8
Write relocations in yaml2obj.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180115 91177308-0d34-0410-b5e6-96231b3b80d8
Add some constraints to use of 'returned':

1) Disallow 'returned' on parameter that is also 'sret' (no sensible semantics, as far as I can tell).
2) Conservatively disallow tail calls through 'returned' parameters that also are 'zext' or 'sext' (for consistency with treatment of other zero-extending and sign-extending operations in tail call position detection...can be revised later to handle situations that can be determined to be safe).

This is a new attribute that is not yet used, so there is no impact.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180118 91177308-0d34-0410-b5e6-96231b3b80d8
Call the potentially costly isAnnotatedParallel() only once. 
Made the uniform write test's checks a bit stricter.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180119 91177308-0d34-0410-b5e6-96231b3b80d8
Hexagon: Remove duplicate instructions to handle global/immediate values
for absolute/absolute-set addressing modes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180120 91177308-0d34-0410-b5e6-96231b3b80d8
LoopVectorizer: Fix 15830. When scalarizing and unrolling stores make sure that the order in which the elements are scalarized is the same as the original order.
This fixes a miscompilation in FreeBSD's regex library.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180121 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Add CF_END

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180123 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Use .AMDGPU.config section to emit stacksize

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180124 91177308-0d34-0410-b5e6-96231b3b80d8