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Justin Bogner 3b83edb037 Re-apply "[VirtRegRewriter] Avoid clobbering registers when expanding copy bundles" 
This is r334750 (which was reverted in r334754) with a fix for an
uninitialized variable that was caught by msan.

Original commit message:
> If a copy bundle happens to involve overlapping registers, we can end
> up with emitting the copies in an order that ends up clobbering some
> of the subregisters. Since instructions in the copy bundle
> semantically happen at the same time, this is incorrect and we need to
> make sure we order the copies such that this doesn't happen.

llvm-svn: 334756
 		2018-06-14 19:24:03 +00:00
clang [X86] Add inline assembly versions of _InterlockedExchange_HLEAcquire/Release and _InterlockedCompareExchange_HLEAcquire/Release for MSVC compatibility. 2018-06-14 18:43:52 +00:00
clang-tools-extra [clangd] FuzzyMatch: forbid tail-tail matches after a miss: [pat] !~ "panther" 2018-06-14 13:50:30 +00:00
compiler-rt [MSan] Linker-initialize static fallback_mutex in msan_allocator.cc 2018-06-14 18:30:51 +00:00
debuginfo-tests [debuginfo-tests] Always use the system python to invoke llgdb.py. 2018-06-10 19:38:26 +00:00
libclc r600/fmin: Flush denormals before calling builtin. 2018-06-07 20:27:58 +00:00
libcxx [libcxx] [test] Strip trailing whitespace. NFC. 2018-06-14 00:12:20 +00:00
libcxxabi private_typeinfo: limit is_dst_type_derived_from_static_type optimization 2018-05-18 20:51:38 +00:00
libunwind [OR1K] Add the EPCR special-purpose register to register state. 2018-05-16 19:09:48 +00:00
lld [ELF][MIPS] Replace calls to MapVector::find by MapVector::lookup. NFC 2018-06-14 11:53:31 +00:00
lldb One ShortFract ought to be enough for everyone. 2018-06-14 19:20:48 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm Re-apply "[VirtRegRewriter] Avoid clobbering registers when expanding copy bundles" 2018-06-14 19:24:03 +00:00
openmp [OpenMP] Fix formatting issues in kmp_stats.h 2018-06-08 22:27:53 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly Simplify the implementation of getCUDALibDeviceFunction. NFC. 2018-06-14 08:54:55 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.