[Mlir-commits] [mlir] [mlir][acc] Add loop tiling utilities for OpenACC (PR #171490)

[LLVM Continuous Integration]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `mlir-s390x-linux` running on `systemz-1` while building `mlir` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/117/builds/15627

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
63.448 [1082/4/4045] Linking CXX static library lib/libMLIRBufferizationDialect.a
63.466 [1081/4/4046] Linking CXX static library lib/libMLIRFuncShardingExtensions.a
63.481 [1080/4/4047] Linking CXX static library lib/libMLIRFuncAllExtensions.a
63.528 [1079/4/4048] Linking CXX static library lib/libMLIRNVGPUDialect.a
63.544 [1078/4/4049] Linking CXX static library lib/libMLIRTensorInferTypeOpInterfaceImpl.a
63.560 [1077/4/4050] Linking CXX static library lib/libMLIRTensorShardingExtensions.a
63.585 [1076/4/4051] Linking CXX static library lib/libMLIRTensorAllExtensions.a
63.586 [1075/4/4052] Linking CXX static library lib/libMLIRShapeDialect.a
63.600 [1074/4/4053] Linking CXX static library lib/libMLIRTensorUtils.a
63.668 [1073/4/4054] Building CXX object tools/mlir/lib/Dialect/OpenACC/Utils/CMakeFiles/obj.MLIROpenACCUtils.dir/OpenACCUtilsTiling.cpp.o
FAILED: tools/mlir/lib/Dialect/OpenACC/Utils/CMakeFiles/obj.MLIROpenACCUtils.dir/OpenACCUtilsTiling.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/uweigand/sandbox/buildbot/mlir-s390x-linux/build/tools/mlir/lib/Dialect/OpenACC/Utils -I/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/OpenACC/Utils -I/home/uweigand/sandbox/buildbot/mlir-s390x-linux/build/tools/mlir/include -I/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/include -I/home/uweigand/sandbox/buildbot/mlir-s390x-linux/build/include -I/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Wundef -Wno-unused-but-set-parameter -Wno-deprecated-copy -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT tools/mlir/lib/Dialect/OpenACC/Utils/CMakeFiles/obj.MLIROpenACCUtils.dir/OpenACCUtilsTiling.cpp.o -MF tools/mlir/lib/Dialect/OpenACC/Utils/CMakeFiles/obj.MLIROpenACCUtils.dir/OpenACCUtilsTiling.cpp.o.d -o tools/mlir/lib/Dialect/OpenACC/Utils/CMakeFiles/obj.MLIROpenACCUtils.dir/OpenACCUtilsTiling.cpp.o -c /home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/OpenACC/Utils/OpenACCUtilsTiling.cpp
/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/OpenACC/Utils/OpenACCUtilsTiling.cpp: In function ‘llvm::SmallVector<mlir::acc::LoopOp> mlir::acc::uncollapseLoops(mlir::acc::LoopOp, unsigned int, unsigned int, mlir::RewriterBase&)’:
/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/OpenACC/Utils/OpenACCUtilsTiling.cpp:310:10: error: could not convert ‘newLoops’ from ‘SmallVector<[...],3>’ to ‘SmallVector<[...],6>’
  310 |   return newLoops;
      |          ^~~~~~~~
      |          |
      |          SmallVector<[...],3>
63.729 [1073/3/4055] Linking CXX static library lib/libMLIRVectorDialect.a
63.783 [1073/2/4056] Linking CXX static library lib/libMLIRTosaDialect.a
63.788 [1073/1/4057] Linking CXX static library lib/libMLIRNVVMDialect.a
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/171490