Add script to do a local build/install of MLIR.

.gitignore

@@ -0,0 +1,3 @@
+build
+build-mlir
+install-mlir

tools/install_mlir.sh

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+#!/bin/bash
+set -e
+
+# Find LLVM source.
+if [ -z "$LLVM_SRC_DIR" ] || ! [ -f "$LLVM_SRC_DIR/llvm/CMakeLists.txt" ]; then
+  echo "Expected LLVM_SRC_DIR variable to be set correctly (got '$LLVM_SRC_DIR')"
+  exit 1
+fi
+LLVM_SRC_DIR="$(realpath "$LLVM_SRC_DIR")"
+echo "Using LLVM source dir: $LLVM_SRC_DIR"
+
+# Setup directories.
+td="$(realpath $(dirname $0)/..)"
+build_mlir="$td/build-mlir"
+install_mlir="$td/install-mlir"
+echo "Building MLIR in $build_mlir"
+echo "Install MLIR to $install_mlir"
+mkdir -p "$build_mlir"
+mkdir -p "$install_mlir"
+
+echo "Beginning build (commands will echo)"
+set -x
+
+cmake -GNinja \
+  "-H$LLVM_SRC_DIR/llvm" \
+  "-B$build_mlir" \
+  -DLLVM_INSTALL_UTILS=ON \
+  -DLLVM_ENABLE_PROJECTS=mlir \
+  "-DCMAKE_INSTALL_PREFIX=$install_mlir" \
+  -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+  -DLLVM_ENABLE_ASSERTIONS=On \
+
+cmake --build "$build_mlir"
+cmake --build "$build_mlir" --target install