Examples with DataLayout com.oracle.truffle.llvm.runtime.datalayout.DataLayout used on opensource projects

Example 6 with DataLayout

use of com.oracle.truffle.llvm.runtime.datalayout.DataLayout in project graal by oracle.

the class InitializeGlobalNode method createGlobalVariableInitializer.

private static StaticInitsNode createGlobalVariableInitializer(LLVMParserResult parserResult, Object moduleName) {
    LLVMParserRuntime runtime = parserResult.getRuntime();
    GetStackSpaceFactory stackFactory = GetStackSpaceFactory.createAllocaFactory();
    List<GlobalVariable> globals = parserResult.getDefinedGlobals();
    DataLayout dataLayout = parserResult.getDataLayout();
    LLVMStatementNode initNode;
    int totalSize = 0;
    try {
        int[] sizes = new int[globals.size()];
        int nonEmptyGlobals = 0;
        for (int i = 0; i < sizes.length; i++) {
            GlobalVariable global = globals.get(i);
            if (global == null || global.getValue() == null) {
                continue;
            }
            long size = globals.get(i).getType().getPointeeType().getSize(dataLayout);
            if (size > Integer.MAX_VALUE || (totalSize + size) > Integer.MAX_VALUE) {
                throw new TypeOverflowException("globals section > 2GB is not supported");
            }
            if (size == 0) {
                continue;
            }
            sizes[i] = (int) size;
            totalSize += (int) size;
            nonEmptyGlobals++;
        }
        int[] bufferOffsets = new int[nonEmptyGlobals];
        LLVMGlobal[] descriptors = new LLVMGlobal[nonEmptyGlobals];
        Buffer buffer = new Buffer(totalSize, runtime, dataLayout);
        int globalIndex = 0;
        totalSize = 0;
        for (int i = 0; i < sizes.length; i++) {
            if (sizes[i] == 0) {
                continue;
            }
            GlobalVariable global = globals.get(i);
            /*
                 * For fetching the address of the global that we want to initialize, we must use
                 * the file scope because we are initializing the globals of the current file.
                 */
            descriptors[globalIndex] = runtime.getFileScope().getGlobalVariable(global.getName());
            assert descriptors[globalIndex] != null;
            bufferOffsets[globalIndex] = totalSize;
            global.getValue().addToBuffer(buffer, runtime, dataLayout, stackFactory);
            totalSize += sizes[i];
            globalIndex++;
        }
        initNode = buffer.createNode(bufferOffsets, descriptors);
    } catch (TypeOverflowException e) {
        initNode = Type.handleOverflowStatement(e);
    }
    return StaticInitsNodeGen.create(new LLVMStatementNode[] { initNode }, "global variable initializers", moduleName);
}