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Sergi Mateo Bellido 31df1adbe9 [OpenMP] Adding support to the mutexinoutset dep-type Summary: this commit adds support to a new dependence type introduced in OpenMP 5.0. The LLVM OpenMP RTL already supports this feature, so we only need to modify CLANG to take advantage of them. Differential Revision: https://reviews.llvm.org/D57576 llvm-svn: 353018		2019-02-04 07:33:19 +00:00
..
ABIInfo.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Address.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BackendUtil.cpp	[NewPM] Add support for new-PM plugins to clang	2019-02-02 23:19:32 +00:00
CGAtomic.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGBlocks.cpp	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
CGBlocks.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGBuilder.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGBuiltin.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGCUDANV.cpp	Remove redundant FunctionDecl argument from a couple functions.	2019-02-02 01:48:23 +00:00
CGCUDARuntime.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCUDARuntime.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCXX.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCXXABI.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCXXABI.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCall.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGCall.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGClass.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCleanup.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCleanup.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGCoroutine.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGDebugInfo.cpp	Reland r345009 "[DebugInfo] Generate debug information for labels."	2019-01-24 05:34:29 +00:00
CGDebugInfo.h	Reland r345009 "[DebugInfo] Generate debug information for labels."	2019-01-24 05:34:29 +00:00
CGDecl.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGDeclCXX.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGException.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGExpr.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGExprAgg.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGExprCXX.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CGExprComplex.cpp	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
CGExprConstant.cpp	[CodeGen] Always use string computed in Sema for PredefinedExpr	2019-01-22 00:11:17 +00:00
CGExprScalar.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGGPUBuiltin.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGLoopInfo.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGLoopInfo.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGNonTrivialStruct.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGObjC.cpp	[CodeGenObjC] Handle exceptions when calling objc_alloc or objc_allocWithZone	2019-01-30 23:17:38 +00:00
CGObjCGNU.cpp	[objc-gnustep] Fix encoding of ivar size for _Bool.	2019-02-03 15:05:52 +00:00
CGObjCMac.cpp	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
CGObjCRuntime.cpp	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
CGObjCRuntime.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGOpenCLRuntime.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGOpenCLRuntime.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGOpenMPRuntime.cpp	[OpenMP] Adding support to the mutexinoutset dep-type	2019-02-04 07:33:19 +00:00
CGOpenMPRuntime.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGOpenMPRuntimeNVPTX.cpp	[OpenMP 5.0] Parsing/sema support for "omp declare mapper" directive.	2019-02-01 20:25:04 +00:00
CGOpenMPRuntimeNVPTX.h	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
CGRecordLayout.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGRecordLayoutBuilder.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGStmt.cpp	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
CGStmtOpenMP.cpp	[OPENMP]Fix PR40536: Do not emit __kmpc_push_target_tripcount if not	2019-01-30 20:49:52 +00:00
CGVTT.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGVTables.cpp	Remove redundant FunctionDecl argument from a couple functions.	2019-02-02 01:48:23 +00:00
CGVTables.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CGValue.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CMakeLists.txt	[CodeGen] Fix -DBUILD_SHARED_LIBS=on build after rC348907	2018-12-12 06:07:33 +00:00
CodeGenABITypes.cpp	Remove redundant FunctionDecl argument from a couple functions.	2019-02-02 01:48:23 +00:00
CodeGenAction.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CodeGenFunction.cpp	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CodeGenFunction.h	[opaque pointer types] Trivial changes towards CallInst requiring	2019-02-03 21:53:49 +00:00
CodeGenModule.cpp	Remove redundant FunctionDecl argument from a couple functions.	2019-02-02 01:48:23 +00:00
CodeGenModule.h	[OpenMP 5.0] Parsing/sema support for "omp declare mapper" directive.	2019-02-01 20:25:04 +00:00
CodeGenPGO.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CodeGenPGO.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CodeGenTBAA.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CodeGenTBAA.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CodeGenTypeCache.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CodeGenTypes.cpp	Remove redundant FunctionDecl argument from a couple functions.	2019-02-02 01:48:23 +00:00
CodeGenTypes.h	Remove redundant FunctionDecl argument from a couple functions.	2019-02-02 01:48:23 +00:00
ConstantEmitter.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ConstantInitBuilder.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CoverageMappingGen.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CoverageMappingGen.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
EHScopeStack.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ItaniumCXXABI.cpp	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
MacroPPCallbacks.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MacroPPCallbacks.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MicrosoftCXXABI.cpp	Cleanup: replace uses of CallSite with CallBase.	2019-01-30 02:54:28 +00:00
ModuleBuilder.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ObjectFilePCHContainerOperations.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
README.txt	…
SanitizerMetadata.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SanitizerMetadata.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SwiftCallingConv.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
TargetInfo.cpp	[WebAssembly] Add an import_field function attribute	2019-02-01 22:25:23 +00:00
TargetInfo.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
VarBypassDetector.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
VarBypassDetector.h	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00

README.txt

IRgen optimization opportunities.

//===---------------------------------------------------------------------===//

The common pattern of
--
short x; // or char, etc
(x == 10)
--
generates an zext/sext of x which can easily be avoided.

//===---------------------------------------------------------------------===//

Bitfields accesses can be shifted to simplify masking and sign
extension. For example, if the bitfield width is 8 and it is
appropriately aligned then is is a lot shorter to just load the char
directly.

//===---------------------------------------------------------------------===//

It may be worth avoiding creation of alloca's for formal arguments
for the common situation where the argument is never written to or has
its address taken. The idea would be to begin generating code by using
the argument directly and if its address is taken or it is stored to
then generate the alloca and patch up the existing code.

In theory, the same optimization could be a win for block local
variables as long as the declaration dominates all statements in the
block.

NOTE: The main case we care about this for is for -O0 -g compile time
performance, and in that scenario we will need to emit the alloca
anyway currently to emit proper debug info. So this is blocked by
being able to emit debug information which refers to an LLVM
temporary, not an alloca.

//===---------------------------------------------------------------------===//

We should try and avoid generating basic blocks which only contain
jumps. At -O0, this penalizes us all the way from IRgen (malloc &
instruction overhead), all the way down through code generation and
assembly time.

On 176.gcc:expr.ll, it looks like over 12% of basic blocks are just
direct branches!

//===---------------------------------------------------------------------===//