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在使用名为pipelineInfo之前，我有一个需要填充的对象。为了填充对象，我使用了一个名为createPipelineInfo的函数。当我使用 Visual Studio 编译调试版本时，这非常有效，但是当我尝试编译发布版本时，编译器会“优化”整个createPipelineInfo函数。

以下是初始化对象及其用途的调用：

VkGraphicsPipelineCreateInfo pipelineInfo = createPipelineInfo(shaderStages, vertexInputInfo, inputAssembly, viewportState, rasterizer,
    multisampling, colorBlending, pipelineLayout, renderPass);

if (vkCreateGraphicsPipelines(logicalDevice, VK_NULL_HANDLE, 1, &pipelineInfo, nullptr, &graphicsPipeline) != VK_SUCCESS) {
    throw std::runtime_error("failed to create graphics pipeline!");
}

下面是createPipelineInfo函数：

inline static VkGraphicsPipelineCreateInfo createPipelineInfo(
    const std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages,
    const VkPipelineVertexInputStateCreateInfo& vertexInputInfo,
    const VkPipelineInputAssemblyStateCreateInfo& inputAssembly,
    const VkPipelineViewportStateCreateInfo& viewportState,
    const VkPipelineRasterizationStateCreateInfo& rasterizer,
    const VkPipelineMultisampleStateCreateInfo& multisampling,
    const VkPipelineColorBlendStateCreateInfo& colorBlending,
    const VkPipelineLayout& pipelineLayout,
    const VkRenderPass& renderPass) {

    VkGraphicsPipelineCreateInfo pipelineInfo{};

    //Shader Stage
    pipelineInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
    pipelineInfo.stageCount = 2;
    pipelineInfo.pStages = shaderStages.data();

    //Fixed Pipeline Stage
    pipelineInfo.pVertexInputState = &vertexInputInfo;
    pipelineInfo.pInputAssemblyState = &inputAssembly;
    pipelineInfo.pViewportState = &viewportState;
    pipelineInfo.pRasterizationState = &rasterizer;
    pipelineInfo.pMultisampleState = &multisampling;
    //pipelineInfo.pDepthStencilState = &depthStencil;
    pipelineInfo.pColorBlendState = &colorBlending;
    pipelineInfo.pDynamicState = nullptr; // Optional

    //Pipeline Layout
    pipelineInfo.layout = pipelineLayout;
    pipelineInfo.renderPass = renderPass;
    pipelineInfo.subpass = 0;
    pipelineInfo.basePipelineHandle = VK_NULL_HANDLE;

    return pipelineInfo;
}

另一方面，如果我复制函数的主体并将其转储以代替函数调用，则一切正常。

VkGraphicsPipelineCreateInfo pipelineInfo{};

//Shader Stage
pipelineInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
pipelineInfo.stageCount = 2;
pipelineInfo.pStages = shaderStages.data();

//Fixed Pipeline Stage
pipelineInfo.pVertexInputState = &vertexInputInfo;
pipelineInfo.pInputAssemblyState = &inputAssembly;
pipelineInfo.pViewportState = &viewportState;
pipelineInfo.pRasterizationState = &rasterizer;
pipelineInfo.pMultisampleState = &multisampling;
//pipelineInfo.pDepthStencilState = &depthStencil;
pipelineInfo.pColorBlendState = &colorBlending;
pipelineInfo.pDynamicState = nullptr; // Optional

//Pipeline Layout
pipelineInfo.layout = pipelineLayout;
pipelineInfo.renderPass = renderPass;
pipelineInfo.subpass = 0;
pipelineInfo.basePipelineHandle = VK_NULL_HANDLE;


if (vkCreateGraphicsPipelines(logicalDevice, VK_NULL_HANDLE, 1, &pipelineInfo, nullptr, &graphicsPipeline) != VK_SUCCESS) {
    throw std::runtime_error("failed to create graphics pipeline!");
}

我试图弄清楚为什么编译器正在优化函数调用并且未能尝试开发一种不涉及转储函数体来代替对函数的每次调用的解决方法。

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1 回答 1

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胡乱猜测：这个参数是copy传的

const std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages

data因此，当通过方法调用在此处获取其内容的地址时：

pipelineInfo.pStages = shaderStages.data();

你调用未定义的行为。编译器不够聪明，无法 1) 由于调用的复杂性，警告您不要引用临时文件，以及 2) 它不会在参数传递时自动执行复制省略。

修复：通过引用传递它（请注意，所有其他参数出于某种原因使用按引用模式）

const std::array<VkPipelineShaderStageCreateInfo, 2> &shaderStages
于 2021-05-09T21:26:14.743 回答