在LLVM IR中设置指令的下一个节点 [英] Set next node of an instruction in LLVM IR

问题描述

1:％mul2 = fmul浮动％1，％1

1: %mul2 = fmul float %1, %1

2:％mul3 = fmul float％mul2，％1

2: %mul3 = fmul float %mul2, %1

3:％mul4 = fmul浮动％mul3，％1

3: %mul4 = fmul float %mul3, %1

4:％mul5 = fmul浮动％mul4，％1

4: %mul5 = fmul float %mul4, %1

5:％mul6 = fmul float％mul5，％1

5: %mul6 = fmul float %mul5, %1

6:％mul7 = fmul float％mul6，％1

6: %mul7 = fmul float %mul6, %1

7:存储浮点数％mul5，浮点数*％x，对齐4，！tbaa！0

7: store float %mul5, float* %x, align 4, !tbaa !0

我想将％mul5的下一个节点设置为％mul7.getNextNode()函数将下一个节点作为％mul6(我要删除).有功能吗?

I want to set the next node of %mul5 to %mul7. getNextNode() function gives the next node as %mul6(which I want to delete). Is there any function to do this?

推荐答案

getNextNode()是LLVM API中内部内容的内部实现详细信息.您永远不要使用它.您可以使用标准的LLVM API来操作指令列表:迭代器和IRBuilder.请参见 http://llvm.org/docs/ProgrammersManual.html#simplechanges 和 http://llvm.org/doxygen/classllvm_1_1IRBuilder.html .

getNextNode() is an internal implementation details of stuff deep inside LLVM API. You should never use it. You the standard LLVM API to manipulate the list of instructions: iterators and IRBuilder. See http://llvm.org/docs/ProgrammersManual.html#simplechanges and http://llvm.org/doxygen/classllvm_1_1IRBuilder.html for more information.

此外，在删除％mul6之前，您必须替换它的所有用法.

Also, before deleting %mul6 you have to replace all uses of it.

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