llvm-project/clang/lib/CodeGen
Yaxun Liu 6c10a66ec7 [CUDA][HIP] Set kernel calling convention before arrange function
Currently clang set kernel calling convention for CUDA/HIP after
arranging function, which causes incorrect kernel function type since
it depends on calling convention.

This patch moves setting kernel convention before arranging
function.

Differential Revision: https://reviews.llvm.org/D47733

llvm-svn: 334457
2018-06-12 00:16:33 +00:00
..
ABIInfo.h Delete BuiltinCC. NFC. 2018-03-20 22:02:57 +00:00
Address.h
BackendUtil.cpp Use SmallPtrSet instead of SmallSet in places where we iterate over the set. 2018-06-09 00:30:45 +00:00
CGAtomic.cpp Added atomic_fetch_min, max, umin, umax intrinsics to clang. 2018-05-13 07:45:58 +00:00
CGBlocks.cpp Fix typos in clang 2018-04-06 15:14:32 +00:00
CGBlocks.h [CodeGen][ObjC] Block captures should inherit the type of the captured 2016-09-16 00:02:06 +00:00
CGBuilder.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGBuiltin.cpp [X86] Fix operand order in the shuffle created for blend builtins. 2018-06-11 17:06:01 +00:00
CGCUDANV.cpp [CUDA] Fix emission of constant strings in sections 2018-06-08 11:17:08 +00:00
CGCUDARuntime.cpp Refactor call emission to package the function pointer together with 2016-10-26 23:46:34 +00:00
CGCUDARuntime.h
CGCXX.cpp Fix a mangling failure on clang-cl C++17 2018-05-17 18:12:18 +00:00
CGCXXABI.cpp [MS] Always use base dtors in place of complete/vbase dtors when possible 2018-03-16 19:40:50 +00:00
CGCXXABI.h [WebAssembly] Use Windows EH instructions for Wasm EH 2018-05-31 22:18:13 +00:00
CGCall.cpp [CUDA][HIP] Set kernel calling convention before arrange function 2018-06-12 00:16:33 +00:00
CGCall.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGClass.cpp Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGCleanup.cpp [WebAssembly] Use Windows EH instructions for Wasm EH 2018-05-31 22:18:13 +00:00
CGCleanup.h [WebAssembly] Use Windows EH instructions for Wasm EH 2018-05-31 22:18:13 +00:00
CGCoroutine.cpp [Coroutines] Catch exceptions in await_resume 2018-05-04 14:02:37 +00:00
CGDebugInfo.cpp This diff includes changes for supporting the following types. 2018-06-04 16:07:52 +00:00
CGDebugInfo.h Revert "[DebugInfo] Don't bother with MD5 checksums of preprocessed files." 2018-05-25 22:35:59 +00:00
CGDecl.cpp CodeGen: block capture shouldn't ICE 2018-05-19 04:21:26 +00:00
CGDeclCXX.cpp Add a command line option 'fregister_global_dtors_with_atexit' to 2018-04-17 18:41:52 +00:00
CGException.cpp [CodeGen] Always use MSVC personality for windows-msvc targets 2018-06-08 00:41:01 +00:00
CGExpr.cpp Revert r332982 Call CreateTempMemWithoutCast for ActiveFlag 2018-05-22 16:13:07 +00:00
CGExprAgg.cpp CodeGen: Fix invalid bitcast for lifetime.start/end 2018-05-17 11:16:35 +00:00
CGExprCXX.cpp Rename invariant.group.barrier to launder.invariant.group 2018-05-03 11:03:01 +00:00
CGExprComplex.cpp Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGExprConstant.cpp Use zeroinitializer for (trailing zero portion of) large array initializers 2018-05-23 23:41:38 +00:00
CGExprScalar.cpp Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGGPUBuiltin.cpp Recommit r326946 after reducing CallArgList memory footprint 2018-03-15 15:25:19 +00:00
CGLoopInfo.cpp [CodeGen] Pass objects that are expensive to copy by const ref. 2016-11-24 16:01:20 +00:00
CGLoopInfo.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGNonTrivialStruct.cpp Move the visitor classes that are used to traverse non-trivial C structs 2018-04-17 19:05:17 +00:00
CGObjC.cpp Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGObjCGNU.cpp [objc-gnustep2] Use unsigned char to avoid potential UB in isalnum. 2018-05-22 10:13:17 +00:00
CGObjCMac.cpp Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGObjCRuntime.cpp [CodeGen] Propagate may-alias'ness of lvalues with TBAA info 2017-10-31 11:05:34 +00:00
CGObjCRuntime.h Clean up CGObjCMac's APIs for deriving class references. NFC. 2016-11-30 23:54:50 +00:00
CGOpenCLRuntime.cpp [OpenCL] Add separate read_only and write_only pipe IR types 2018-04-27 10:37:04 +00:00
CGOpenCLRuntime.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGOpenMPRuntime.cpp Move helper classes into anonymous namespaces. NFCI. 2018-05-15 21:26:47 +00:00
CGOpenMPRuntime.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGOpenMPRuntimeNVPTX.cpp [OPENMP, NVPTX] Fixed codegen for orphaned parallel region. 2018-05-25 20:16:03 +00:00
CGOpenMPRuntimeNVPTX.h [OPENMP, NVPTX] Initial support for L2 parallelism in SPMD mode. 2018-05-10 18:32:08 +00:00
CGRecordLayout.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CGRecordLayoutBuilder.cpp This patch provides that bitfields are splitted even in case 2018-05-10 12:31:12 +00:00
CGStmt.cpp Revert r331843 "[DebugInfo] Generate debug information for labels." 2018-05-09 09:29:58 +00:00
CGStmtOpenMP.cpp [OPENMP] DO not crash on combined constructs in declare target 2018-05-16 15:08:32 +00:00
CGVTT.cpp Recommit r324107 again. 2018-02-07 22:15:33 +00:00
CGVTables.cpp IRGen: Rename bitsets -> type metadata. NFC. 2018-05-30 22:29:08 +00:00
CGVTables.h [MS] Emit vftable thunks for functions with incomplete prototypes 2018-04-02 20:20:33 +00:00
CGValue.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CMakeLists.txt Link to AggressiveInstCombine in a few places. Unbreaks build for me. 2018-04-24 08:40:44 +00:00
CodeGenABITypes.cpp Include getting generated struct offsets in CodegenABITypes 2017-10-10 23:54:21 +00:00
CodeGenAction.cpp Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CodeGenFunction.cpp [CodeGen] Improve diagnostics related to target attributes 2018-06-07 08:48:36 +00:00
CodeGenFunction.h [WebAssembly] Use Windows EH instructions for Wasm EH 2018-05-31 22:18:13 +00:00
CodeGenModule.cpp [CUDA][HIP] Set kernel calling convention before arrange function 2018-06-12 00:16:33 +00:00
CodeGenModule.h [CodeGen] Improve diagnostics related to target attributes 2018-06-07 08:48:36 +00:00
CodeGenPGO.cpp Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
CodeGenPGO.h Remove a dead field. NFC. 2017-04-24 20:54:36 +00:00
CodeGenTBAA.cpp [CodeGen] Fix generation of TBAA tags for may-alias accesses 2018-02-20 12:33:04 +00:00
CodeGenTBAA.h [CodeGen] Fix generation of TBAA tags for may-alias accesses 2018-02-20 12:33:04 +00:00
CodeGenTypeCache.h Delete BuiltinCC. NFC. 2018-03-20 22:02:57 +00:00
CodeGenTypes.cpp This diff includes changes for supporting the following types. 2018-06-04 16:07:52 +00:00
CodeGenTypes.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
ConstantEmitter.h Convert clang::LangAS to a strongly typed enum 2017-10-15 18:48:14 +00:00
ConstantInitBuilder.cpp Further fixes and improvements to the ConstantInitBuilder API. 2017-03-06 19:04:16 +00:00
CoverageMappingGen.cpp [Coverage] End deferred regions before labels, fixes PR35867 2018-06-01 00:37:13 +00:00
CoverageMappingGen.h Remove \brief commands from doxygen comments. 2018-05-09 01:00:01 +00:00
EHScopeStack.h Spelling mistakes in comments. NFCI. (PR27635) 2017-03-30 14:13:19 +00:00
ItaniumCXXABI.cpp This diff includes changes for supporting the following types. 2018-06-04 16:07:52 +00:00
MacroPPCallbacks.cpp Reland '[clang] Adding CharacteristicKind to PPCallbacks::InclusionDirective' 2018-05-10 19:05:36 +00:00
MacroPPCallbacks.h Reland '[clang] Adding CharacteristicKind to PPCallbacks::InclusionDirective' 2018-05-10 19:05:36 +00:00
MicrosoftCXXABI.cpp [WebAssembly] Use Windows EH instructions for Wasm EH 2018-05-31 22:18:13 +00:00
ModuleBuilder.cpp D34444: Teach codegen to work in incremental processing mode. 2017-08-27 10:58:03 +00:00
ObjectFilePCHContainerOperations.cpp [clang] Update uses of DEBUG macro to LLVM_DEBUG. 2018-05-15 13:30:56 +00:00
README.txt
SanitizerMetadata.cpp hwasan: add -fsanitize=kernel-hwaddress flag 2018-04-13 18:05:21 +00:00
SanitizerMetadata.h
SwiftCallingConv.cpp Generalize the swiftcall API since being passed indirectly isn't 2018-04-07 20:16:47 +00:00
TargetInfo.cpp [CUDA][HIP] Set kernel calling convention before arrange function 2018-06-12 00:16:33 +00:00
TargetInfo.h [CUDA][HIP] Set kernel calling convention before arrange function 2018-06-12 00:16:33 +00:00
VarBypassDetector.cpp Fix typos in clang 2018-04-06 15:14:32 +00:00
VarBypassDetector.h [CodeGen] Don't emit lifetime intrinsics for some local variables 2016-10-26 05:42:30 +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!

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