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Quentin Colombet 96f54de8ff [InstCombine] Optimize `atomicrmw <op>, 0` into `load atomic` when possible 
This commit teaches InstCombine how to replace an atomicrmw operation
into a simple load atomic.
For a given `atomicrmw <op>`, this is possible when:
1. The ordering of that operation is compatible with a load (i.e.,
   anything that doesn't have a release semantic).
2. <op> does not modify the value being stored

Differential Revision: https://reviews.llvm.org/D57854

llvm-svn: 353471
 		2019-02-07 21:27:23 +00:00
..
Analysis [LSR] Generate cross iteration indexes 2019-02-07 13:32:54 +00:00
AsmParser Revert "[Sanitizers] UBSan unreachable incompatible with ASan in the presence of `noreturn` calls" 2019-01-24 18:04:21 +00:00
BinaryFormat [WebAssembly] clang-tidy (NFC) 2019-02-04 19:13:39 +00:00
Bitcode [opaque pointer types] Pass value type to GetElementPtr creation. 2019-02-01 20:44:47 +00:00
CodeGen [CodeGen] Handle vector UADDO, SADDO, USUBO, SSUBO 2019-02-07 21:02:22 +00:00
DebugInfo [CodeView] Fix cycles in debug info when merging Types with global hashes 2019-02-07 15:24:18 +00:00
Demangle Add missing include (cstdlib) to Demangle.h 2019-01-22 19:18:18 +00:00
ExecutionEngine [opaque pointer types] Pass value type to LoadInst creation. 2019-02-01 20:44:24 +00:00
FuzzMutate [opaque pointer types] Pass value type to LoadInst creation. 2019-02-01 20:44:24 +00:00
Fuzzer
…
IR Move DomTreeUpdater from IR to Analysis 2019-02-06 02:52:52 +00:00
IRReader Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
LTO Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
LineEditor Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
Linker Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
MC [WebAssembly] Add symbol flag to the binary format llvm.used 2019-02-07 01:24:44 +00:00
MCA [MCA] Speedup ResourceManager queries. NFCI 2019-02-06 14:57:28 +00:00
Object [llvm-ar][libObject] Fix relative paths when nesting thin archives. 2019-02-07 16:41:06 +00:00
ObjectYAML [WebAssembly] Add symbol flag to the binary format llvm.used 2019-02-07 01:24:44 +00:00
OptRemarks Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
Option Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
Passes [HotColdSplit] Move splitting after instrumented PGO use 2019-02-06 04:29:39 +00:00
ProfileData [PGO] Use a function for creating variable for profile file name. NFC. 2019-02-05 22:34:45 +00:00
Support Move SMTSolver dump() methods out-of-line. 2019-02-07 21:03:18 +00:00
TableGen [TblGen] Extend !if semantics through new feature !cond 2019-01-25 10:25:25 +00:00
Target [DAGCombiner] (add (umax X, C), -C) --> (usubsat X, C) (PR40111) 2019-02-07 20:14:43 +00:00
Testing Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
TextAPI Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ToolDrivers Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
Transforms [InstCombine] Optimize `atomicrmw <op>, 0` into `load atomic` when possible 2019-02-07 21:27:23 +00:00
WindowsManifest Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
XRay Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
CMakeLists.txt [llvm-mca] Move llvm-mca library to llvm/lib/MCA. 2018-12-17 08:08:31 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00