Prior to this change spv_ptrcast (and OpBitcast) was never emitted for
GEP resulting pointers. While such SPIR-V was (mostly) accepted by the
NEO GPU driver, the generated SPIR-V was incorrect.
The newly added test (pointers/getelementptr-bitcast-load.ll) verifies
that a correct bitcast is added for more complex cases and passes
spirv-val. The test is based on an OpenCL CTS test (basic/prefetch).
This patch introduces a new spv_ptrcast intrinsic for tracking expected
pointer types. The change fixes multiple OpenCL CTS regressions due the
switch to opaque pointers (e.g. basic/hiloeo).
- After #73887, spirv.Image cannot has a zeroinitializer, even though
it's only used in metadata to pass down the type info to the backend.
Instead of creating zeros, create undef ones of that target-specific
types.
This commit adds 2 new instructions in the selector:
- OpAccessChain
- OpInBoundsAccessChain.
The choice between the two relies on the `inbounds` marker.
Those instruction are not used for OpenCL, to maintain the same
behavior as previously. They are only added when building for logical
SPIR-V, as it doesn't support the pointer equivalent.
Because logical SPIR-V doesn't support pointer cast either, the
assign_ptr_type intrinsic need to be generated so OpAccessChain gets
lowered with the correct pointer type, instead of i8*.
Fixes#66107
---------
Signed-off-by: Nathan Gauër <brioche@google.com>
This change adds a new spv_undef intrinsic which is emitted in place of
aggregate undef operands and later selected to single OpUndef SPIR-V
instruction. The behavior matches that of Khronos SPIR-V Translator and
should support nested aggregates.
Differential Revision: https://reviews.llvm.org/D143107
The patch adds the support of OpenCL and SPIR-V built-in types. It also
implements ExtInst selection and adds spv_unreachable and spv_alloca
intrinsics which improve the generation of the corresponding SPIR-V code.
Five LIT tests are included to demonstrate the improvement.
Differential Revision: https://reviews.llvm.org/D132648
Co-authored-by: Aleksandr Bezzubikov <zuban32s@gmail.com>
Co-authored-by: Michal Paszkowski <michal.paszkowski@outlook.com>
Co-authored-by: Andrey Tretyakov <andrey1.tretyakov@intel.com>
Co-authored-by: Konrad Trifunovic <konrad.trifunovic@intel.com>
The patch adds SPIRVPrepareFunctions pass, which modifies function
signatures containing aggregate arguments and/or return values before
IR translation. Information about the original signatures is stored in
metadata. It is used during call lowering to restore correct SPIR-V types
of function arguments and return values. This pass also substitutes some
llvm intrinsic calls to function calls, generating the necessary functions
in the module, as the SPIRV translator does.
The patch also includes changes in other modules, fixing errors and
enabling many SPIR-V features that were omitted earlier. And 15 LIT tests
are also added to demonstrate the new functionality.
Differential Revision: https://reviews.llvm.org/D129730
Co-authored-by: Aleksandr Bezzubikov <zuban32s@gmail.com>
Co-authored-by: Michal Paszkowski <michal.paszkowski@outlook.com>
Co-authored-by: Andrey Tretyakov <andrey1.tretyakov@intel.com>
Co-authored-by: Konrad Trifunovic <konrad.trifunovic@intel.com>
The patch adds SPIR-V specific intrinsics required to keep information
critical to SPIR-V consistency (types, constants, etc.) during translation
from IR to MIR.
Two related passes (SPIRVEmitIntrinsics and SPIRVPreLegalizer) and several
LIT tests (passed with this change) have also been added.
It also fixes the issue with opaque pointers in SPIRVGlobalRegistry.cpp
and the mismatch of the data layout between the SPIR-V backend and clang
(Issue #55122).
Differential Revision: https://reviews.llvm.org/D124416
Co-authored-by: Aleksandr Bezzubikov <zuban32s@gmail.com>
Co-authored-by: Michal Paszkowski <michal.paszkowski@outlook.com>
Co-authored-by: Andrey Tretyakov <andrey1.tretyakov@intel.com>
Co-authored-by: Konrad Trifunovic <konrad.trifunovic@intel.com>
