CODEWITHSUNDEEP
llvm
Adarsh Konchady
Adarsh Konchady

Reputation: 2737

Set next node of an instruction in LLVM IR

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

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

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

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

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

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

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

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?

Upvotes: 1

Views: 1718

Answers (1)

Anton Korobeynikov
Anton Korobeynikov

Reputation: 9324

getNextNode() is an internal implementation details of stuff deep inside LLVM API. You should never use it. Use 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.

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

Upvotes: 5

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