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memory is required
Summary:
This patch adds support for the handling of the variables under the declare target to clause.
The variables in this case are handled like link variables are. A pointer is created on the host and then mapped to the device. The runtime will then copy the address of the host variable in the device pointer.
Reviewers: ABataev, AlexEichenberger, caomhin
Reviewed By: ABataev
Subscribers: guansong, jdoerfert, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D63108
llvm-svn: 363959
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Currently, we ignore all dso locality attributes/info when building for
the device and thus all symblos are externally visible and can be
preemted at the runtime. It may lead to incorrect results. We need to
follow the same logic, compiler uses for static/pie builds.
llvm-svn: 361283
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If the variable was declared and marked as declare target, a new offload
entry with size 0 is created. But if later a definition is created and
marked as declare target, this definition is not added to the entry set
and the definition remains not mapped to the target. Patch fixes this
problem allowing to redefine the size and linkage for
previously registered declaration.
llvm-svn: 355960
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Fixed emission of the target regions found in the virtual functions.
Previously we may end up with the situation when those regions could be
skipped.
llvm-svn: 347793
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Fixed lookup for the target regions in unused virtual functions + fixed
processing of the global variables not marked as declare target but
emitted during debug info emission.
llvm-svn: 346343
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This reverts commit https://reviews.llvm.org/rL344150 which causes
MachineOutliner related failures on the ppc64le multistage buildbot.
llvm-svn: 344526
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This is currently a clang extension and a resolution
of the defect report in the C++ Standard.
Differential Revision: https://reviews.llvm.org/D46441
llvm-svn: 344150
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target constructs.
Prevent compilation of the classes with the virtual tables when
compiling for the device.
llvm-svn: 342741
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context.
If the explicit template instantiation definition defined outside of the
target context, its vtable should not be marked as used. This is true
for other situations where the compiler want to emit vtables
unconditionally.
llvm-svn: 341570
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'declare target'.
All the functions, referenced in implicit|explicit target regions must
be emitted during code emission for the device.
llvm-svn: 341093
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declarations.
We should not create offloading entries for declare target var
declarations as it causes compiler crash.
llvm-svn: 340968
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If the function is actually a weak reference, it should not be marked as
deferred definition as this is only a declaration. Patch adds checks for
the definitions if they must be emitted. Otherwise, only declaration is
emitted.
llvm-svn: 340191
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The compiler may produce unexpected error messages/crashes when declare
target variables were used. Patch fixes problems with the declarations
marked as declare target to or link.
llvm-svn: 339805
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declare target.
According to OpenMP 5.0, variables captured in lambdas in declare target
regions must be considered as implicitly declare target.
llvm-svn: 339152
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No need to change the linkage, we can avoid the problem using special variable. That points to the original variable and, thus, prevent some of the optimizations that might break the compilation.
llvm-svn: 338399
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Do not mark static variable as internal on the device as they must be
visible from the host to be mapped correctly.
llvm-svn: 338139
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functions.
If the combined construct is specified in the declare target function
and the device code is emitted, the compiler crashes because of the
incorrectly chosen captured stmt. We should choose the innermost
captured statement, not the outermost.
llvm-svn: 332477
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If the global variables are marked as declare target and they need
ctors/dtors, these ctors/dtors are emitted and then invoked by the
offloading runtime library. They are not explicitly used in the emitted
code and thus can be optimized out. Patch marks these functions as used,
so the optimizer cannot remove these function during the optimization
phase.
llvm-svn: 331879
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The linkage of the global entries must be weak to enable support of
redefinition of the same target regions in multiple compilation units.
llvm-svn: 331768
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Added correct emission of the C++ member functions for the device
function when they are used in the device constructs.
llvm-svn: 331365
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devices.
If the function is an instantiation|specialization of the template and
is used in the device code, the definitions of such functions should be
emitted for the device.
llvm-svn: 331261
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Non-static member functions should not be emitted as a standalone
functions, this leads to compiler crash.
llvm-svn: 331206
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Global variables marked as declare target are allowed to be used in map
clauses. Patch fixes the crash of the compiler on the declare target
variables in map clauses.
llvm-svn: 330156
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Added initial codegen for device side of declarations inside `omp
declare target` construct + codegen for implicit `declare target`
functions, which are used in the target regions.
llvm-svn: 327636
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