Update llvm, 2025 Q3

[paul0403]

Context:
Update llvm, mhlo and enzyme, 2025 Q3.
The latest pair of good versions, indicated by mhlo, is tensorflow/mlir-hlo@1dd2e71

mhlo=1dd2e71331014ae0373f6bf900ce6be393357190
llvm=f8cb7987c64dcffb72414a40560055cb717dbf74

For Enzyme, we go to the latest release https://github.com/EnzymeAD/Enzyme/releases/tag/v0.0.186

enzyme=v0.0.186

with commit 8c1a596158f6194f10e8ffd56a1660a61c54337e

Description of the Change:
Miscellaneous:

1. GreedyRewriteConfig.stuff = blah -> GreedyRewriteConfig.setStuff(blah) [mlir] add a fluent API to GreedyRewriterConfig llvm/llvm-project#137122
2. llvm gep op inbounds attribute is subsumed under a gep sign wrap enum flag [mlir][llvm] Support nusw and nuw in GEP llvm/llvm-project#137272
3. arith::Constant[Int, Float]Op builders now have the same argument order as other ops (output type first, then arguments) switch type and value ordering for arith Constant[XX]Op llvm/llvm-project#144636 (note that Enzyme also noticed this Update to newer llvm EnzymeAD/Enzyme#2379 😆 )
4. The lookupOrCreateFn functions now take in a builder instead of instantiating a new one [mlir][LLVM] Add OpBuilder & to lookupOrCreateFn functions llvm/llvm-project#136421
5. getStridedElementPtr now takes in rewriter as the first argument (instead of the last), like all the other utils emit inbounds and nuw attributes in memref. llvm/llvm-project#138984
6. The following functions now return a LogicalResult, and will be caught by warnings as errors as -Wunused-result:
   • func::FuncOp.[insert, erase]Argument(s) [mlir] allow function type cloning to fail llvm/llvm-project#137130
   • getBackwardSlice() [MLIR] Change getBackwardSlice to return a logicalresult rather than crash llvm/llvm-project#140961

Things related to transform.apply_registered_pass op:

1. It now takes in a dynamic_options [MLIR][Transform] Allow ApplyRegisteredPassOp to take options as a param llvm/llvm-project#142683. We don't need to use this as all our pass options are static.
2. The options it takes in are now dictionaries instead of strings [MLIR][Transform] apply_registered_pass op's options as a dict llvm/llvm-project#143159

Bufferization:

1. bufferization.to_memref op is renamed to bufferization.to_buffer [mlir][bufferization][NFC] Rename to_memref to to_buffer llvm/llvm-project#137180
2. bufferization.to_tensor op's builder now needs the result type to be explicit [mlir][bufferization] Support custom types (1/N) llvm/llvm-project#142986. This is also needed by a patched mhlo pass.
3. The getBuffer() methods take in a new arg for BufferizationState [MLIR] Add bufferization state class to OneShotBufferization pass llvm/llvm-project#141019, [MLIR] Add bufferization state to getBufferType and resolveConflicts interface methods llvm/llvm-project#141466
4. UnknownTypeConverterFn in bufferization options now takes in just a type instead of a full value [mlir][bufferization] Use Type instead of Value in unknown conversion llvm/llvm-project#144658

Related GitHub Issues:
[sc-95176]
[sc-95664]

[paul0403]

@mehrdad2m @dime10 this is now completely ready

[dime10]

Thanks @paul0403, just two points:

[dime10]

🚀