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Update LLVM to llvm/llvm-project@ac8bb735 (#19566)
Update LLVM to llvm/llvm-project@ac8bb735. C++ changes are related to change in behavior of TypeConverter changed in iree-org/llvm-project@3cc311a. It used to generate UnrealizedConversionCastOp, during applySignatureConversion in GenericOpTypePropagation of TypePropagationPass.cpp, however now it's not. This causes unrealized_conversion_cast to be generated later and hence survive the pass. To repro above behavior, try undo the C++ change in this PR and then: ``` wget https://gist.githubusercontent.com/raikonenfnu/dfb3b274007df8c4be87daf9ee67a5f4/raw/e48cc07e5fa558cd2c450b0e3ae46568136e1be6/type_propagate_repro.mlir iree-opt --pass-pipeline='builtin.module(func.func(iree-codegen-type-propagation))' propagate_test.mlir -o /dev/null error: failed to legalize unresolved materialization from ('i8') to ('i1') that remained live after conversion ^bb0(%in: i1, %in_0: f32, %in_1: f32, %out: f32): ^ propagate_test.mlir:5:8: note: see current operation: %10 = "builtin.unrealized_conversion_cast"(%arg0) : (i8) -> i1 propagate_test.mlir:6:11: note: see existing live user here: %10 = arith.select %9, %in_0, %in_1 : f32 ``` Additionally, we made API changes in 6ed8924 from: 1. `applyPatternsAndFoldGreedily` -> `applyPatternsGreedily` 2. `applyOpPatternsAndFold` -> `applyOpPatternsGreedily` To resolve depracated API error in bazel This PR also carries the following reverts: llvm/llvm-project#119461 The main issue with PR 119461 is it breaks e2e riscv test by making it get stuck on infinite loop. ``` /path/to/iree-build/tools/iree-compile --output-format=vm-bytecode --mlir-print-op-on-diagnostic=false --iree-hal-target-backends=llvm-cpu --iree-input-type=stablehlo --iree-input-demote-f64-to-f32 --iree-llvmcpu-target-cpu=generic /path/to/iree/tests/e2e/stablehlo_ops/three_fry.mlir -o three_fly_exec_target.mlir --iree-llvmcpu-target-triple=riscv64 --iree-llvmcpu-target-abi=lp64d --iree-llvmcpu-target-cpu-features=+m,+a,+d,+zvl512b,+v --mlir-disable-threading > infinite loop ``` --------- Signed-off-by: Stanley Winata <stanley.winata@amd.com>
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