llvm-project/clang/lib/CodeGen
John McCall a37c2fa409 Fix the emission of the copy-initialization of a block capture
from a lambda capture when the capture is not trivially-copyable.

rdar://13295759

llvm-svn: 176431
2013-03-04 06:32:36 +00:00
..
ABIInfo.h Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
BackendUtil.cpp Update clang for LLVM API change. No functionality change. 2013-02-27 06:22:58 +00:00
CGBlocks.cpp Fix the emission of the copy-initialization of a block capture 2013-03-04 06:32:36 +00:00
CGBlocks.h Remove useless 'llvm::' qualifier from names like StringRef and others that are 2013-01-12 19:30:44 +00:00
CGBuilder.h Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate to 2013-01-02 11:45:17 +00:00
CGBuiltin.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGCUDANV.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGCUDARuntime.cpp Sort all of Clang's files under 'lib', and fix up the broken headers 2012-12-04 09:13:33 +00:00
CGCUDARuntime.h CUDA: IR generation support for device stubs 2011-10-06 18:51:56 +00:00
CGCXX.cpp Better support for constructors with -cxx-abi microsoft, partly fixes PR12784 2013-02-27 13:46:31 +00:00
CGCXXABI.cpp Better support for constructors with -cxx-abi microsoft, partly fixes PR12784 2013-02-27 13:46:31 +00:00
CGCXXABI.h Better support for constructors with -cxx-abi microsoft, partly fixes PR12784 2013-02-27 13:46:31 +00:00
CGCall.cpp Add more of the command line options as attribute flags. 2013-02-28 22:49:57 +00:00
CGCall.h Use the AttributeSet instead of AttributeWithIndex. 2013-01-27 02:46:53 +00:00
CGClass.cpp Better support for constructors with -cxx-abi microsoft, partly fixes PR12784 2013-02-27 13:46:31 +00:00
CGCleanup.cpp Make sure we don't emit IR for unused EH cleanups. PR13359. 2012-08-02 00:10:24 +00:00
CGCleanup.h Documentation cleanup: 2012-06-15 22:10:14 +00:00
CGDebugInfo.cpp Temporarily revert r176116 for compile-time performance regression. 2013-02-27 01:31:55 +00:00
CGDebugInfo.h Temporarily revert r176116 for compile-time performance regression. 2013-02-27 01:31:55 +00:00
CGDecl.cpp [Sema] Semantic analysis for empty-declaration and attribute-declaration. 2013-02-22 17:15:32 +00:00
CGDeclCXX.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGException.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGExpr.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGExprAgg.cpp patch for PR9027 and // rdar://11861085 2013-01-25 23:57:05 +00:00
CGExprCXX.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGExprComplex.cpp Implement OpenCL event_t as Clang builtin type, including event_t related OpenCL restrictions (OpenCL 1.2 spec 6.9) 2013-01-20 12:31:11 +00:00
CGExprConstant.cpp Add a new LangOpt NativeHalfType. This option allows for native half/fp16 2013-01-23 11:56:20 +00:00
CGExprScalar.cpp Improve C11 atomics support: 2013-03-03 16:02:42 +00:00
CGObjC.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGObjCGNU.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGObjCMac.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGObjCRuntime.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGObjCRuntime.h Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CGOpenCLRuntime.cpp Add OpenCL samplers as Clang builtin types and check sampler related restrictions. 2013-02-07 10:55:47 +00:00
CGOpenCLRuntime.h Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate to 2013-01-02 11:45:17 +00:00
CGRTTI.cpp Add OpenCL samplers as Clang builtin types and check sampler related restrictions. 2013-02-07 10:55:47 +00:00
CGRecordLayout.h Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate to 2013-01-02 11:45:17 +00:00
CGRecordLayoutBuilder.cpp First pass at abstracting out a class for the target C++ ABI. 2013-01-25 22:30:49 +00:00
CGStmt.cpp LLVM API changes. 2013-03-02 01:20:22 +00:00
CGVTT.cpp simplify a bunch of code to use the well-known LLVM IR types computed by CodeGenModule. 2012-02-07 00:39:47 +00:00
CGVTables.cpp Better support for constructors with -cxx-abi microsoft, partly fixes PR12784 2013-02-27 13:46:31 +00:00
CGVTables.h The standard ARM C++ ABI dictates that inline functions are 2013-01-25 22:31:03 +00:00
CGValue.h patch for PR9027 and // rdar://11861085 2013-01-25 23:57:05 +00:00
CMakeLists.txt clang/lib: [CMake] Update tblgen'd dependencies. 2012-07-27 06:18:33 +00:00
CodeGenAction.cpp Pass the target options through to code generation. 2013-02-14 08:09:20 +00:00
CodeGenFunction.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CodeGenFunction.h Restore order to placate test. I had no real reason to switch them. 2013-03-01 01:38:54 +00:00
CodeGenModule.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CodeGenModule.h Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
CodeGenTBAA.cpp Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate to 2013-01-02 11:45:17 +00:00
CodeGenTBAA.h Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate to 2013-01-02 11:45:17 +00:00
CodeGenTypes.cpp Add streamed versions of getQualifiedNameAsString. 2013-02-23 13:53:57 +00:00
CodeGenTypes.h Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate to 2013-01-02 11:45:17 +00:00
ItaniumCXXABI.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
Makefile BUILD_ARCHIVE is the default for libraries, no need to set it. 2010-07-18 00:14:47 +00:00
MicrosoftCXXABI.cpp Better support for constructors with -cxx-abi microsoft, partly fixes PR12784 2013-02-27 13:46:31 +00:00
ModuleBuilder.cpp Pass the target options through to code generation. 2013-02-14 08:09:20 +00:00
README.txt
TargetInfo.cpp Use the actual ABI-determined C calling convention for runtime 2013-02-28 19:01:20 +00:00
TargetInfo.h Fix the required args count for variadic blocks. 2012-12-07 07:03:17 +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!

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