Skip to content

[mlir][affine] Add fold logic when the affine.yield has IV as operand in the AffineForEmptyLoopFolder #165639

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 7 commits into
base: main
Choose a base branch
from
+37 −5
Open

[mlir][affine] Add fold logic when the affine.yield has IV as operand in the AffineForEmptyLoopFolder #165639

Changes from 1 commit
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
a4e8857
add loop yield iv logic into AffineForEmptyLoopFolder.
linuxlonelyeagle Oct 18, 2025
0fa939c
Update mlir/lib/Dialect/Affine/IR/AffineOps.cpp
linuxlonelyeagle Oct 18, 2025
e4ebc2b
update.
linuxlonelyeagle Oct 18, 2025
b0ce9ff
Process trip count equals zero.
linuxlonelyeagle Oct 18, 2025
c816d09
rebase main and update code.
linuxlonelyeagle Oct 28, 2025
86c0c0b
make replacements from SmallVector<OpFoldResult,4> to SmallVector<OpF…
linuxlonelyeagle Oct 30, 2025
22b96ba
use llvm::to_vector return replacements.
linuxlonelyeagle Oct 30, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions mlir/lib/Dialect/Affine/IR/AffineOps.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2637,7 +2637,7 @@ static SmallVector<OpFoldResult> AffineForEmptyLoopFolder(AffineForOp forOp) {
// results.
return forOp.getInits();
}
SmallVector<OpFoldResult> replacements;
SmallVector<OpFoldResult, 4> replacements;
auto yieldOp = cast<AffineYieldOp>(forOp.getBody()->getTerminator());
auto iterArgs = forOp.getRegionIterArgs();
bool hasValDefinedOutsideLoop = false;
Expand Down Expand Up @@ -2675,7 +2675,7 @@ static SmallVector<OpFoldResult> AffineForEmptyLoopFolder(AffineForOp forOp) {
// out of order.
if (tripCount.has_value() && tripCount.value() >= 2 && iterArgsNotInOrder)
return {};
return replacements;
return llvm::to_vector(replacements);
Copy link
Member

@kuhar kuhar Oct 30, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

What was the previous error? Can you share the link to the buildbot that complained? I don't understand why this would fix anything.

Copy link
Member Author

@linuxlonelyeagle linuxlonelyeagle Oct 30, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

https://lab.llvm.org/buildbot/#/builders/117/builds/14631 you can see it in the build-unified-tree.

71.321 [1324/4/3756] Building CXX object tools/mlir/lib/Dialect/Ptr/IR/CMakeFiles/obj.MLIRPtrDialect.dir/PtrDialect.cpp.o
71.352 [1323/4/3757] Building CXX object tools/mlir/lib/Dialect/PDL/IR/CMakeFiles/obj.MLIRPDLDialect.dir/PDLTypes.cpp.o
71.394 [1322/4/3758] Building CXX object tools/mlir/lib/Dialect/PDLInterp/IR/CMakeFiles/obj.MLIRPDLInterpDialect.dir/PDLInterp.cpp.o
71.435 [1321/4/3759] Building CXX object tools/mlir/lib/Dialect/Ptr/IR/CMakeFiles/obj.MLIRPtrMemorySpaceInterfaces.dir/MemorySpaceInterfaces.cpp.o
71.448 [1320/4/3760] Linking CXX static library lib/libMLIRPDLDialect.a
71.518 [1319/4/3761] Linking CXX static library lib/libMLIRPtrMemorySpaceInterfaces.a
71.551 [1318/4/3762] Linking CXX static library lib/libMLIRPDLInterpDialect.a
71.597 [1317/4/3763] Building CXX object tools/mlir/lib/Dialect/Affine/IR/CMakeFiles/obj.MLIRAffineDialect.dir/AffineOps.cpp.o
FAILED: tools/mlir/lib/Dialect/Affine/IR/CMakeFiles/obj.MLIRAffineDialect.dir/AffineOps.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/Affine/IR -I/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/Affine/IR -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/Affine/IR/CMakeFiles/obj.MLIRAffineDialect.dir/AffineOps.cpp.o -MF tools/mlir/lib/Dialect/Affine/IR/CMakeFiles/obj.MLIRAffineDialect.dir/AffineOps.cpp.o.d -o tools/mlir/lib/Dialect/Affine/IR/CMakeFiles/obj.MLIRAffineDialect.dir/AffineOps.cpp.o -c /home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/Affine/IR/AffineOps.cpp
/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/Affine/IR/AffineOps.cpp: In function ‘llvm::SmallVector<mlir::OpFoldResult> AffineForEmptyLoopFolder(mlir::affine::AffineForOp)’:
/home/uweigand/sandbox/buildbot/mlir-s390x-linux/llvm-project/mlir/lib/Dialect/Affine/IR/AffineOps.cpp:2678:10: error: could not convert ‘replacements’ from ‘SmallVector<[...],4>’ to ‘SmallVector<[...],6>’
 2678 |   return replacements;
      |          ^~~~~~~~~~~~
      |          |

Copy link
Member Author

@linuxlonelyeagle linuxlonelyeagle Oct 30, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

My apologies, I misunderstood your earlier point. I thought you wanted me to use to_vector_of<T>.

}

/// Canonicalize the bounds of the given loop.
Expand Down