[PATCH] D32977: [OpenCL] Emit function-scope variable in constant address space as static variable
Yaxun Liu via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Wed May 10 06:33:49 PDT 2017
yaxunl marked an inline comment as done.
yaxunl added inline comments.
Comment at: lib/Sema/SemaDecl.cpp:10286
+ // these variables must be a compile time constant.
+ VDecl->getType().getAddressSpace() == LangAS::opencl_constant)
> Should this rule apply even in C++ mode? I can't remember if there are any OpenCL/C++ hybrids.
No. This rule (static local variable needs to be initialised with compile-time constant) only applies to C and OpenCL.
In C++ static local variable can be initialised with non-compile-time constant, in which case Clang will emit atomic instructions to make sure it is only initialised once.
Currently OpenCL 2.2 defines OpenCL C++ but clang does not support it.
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