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So one way might look like this: IRBuilder<> Builder(&*BB); // BB = Function::iterator OR IRBuilder<> Builder(CallInst->getParent()); Builder.SetInsertPoint(CallInst); InstructionClass *YourNewInstruction = builder.CreateInstructionClass(.....); // InstructionClass = type of instruction you are inserting -Ryan On Sat, Sep 3, 2016 at 6:04 PM, Ryan Taylor <ryta1203 at gmail.com> wrote: > Take a look at IRBuilder and SetInsertPoint(). > > On Sep 3, 2016 18:02, "SHUCAI YAO v...

...ev at lists.llvm.org> wrote: >> >> So one way might look like this: >> >> IRBuilder<> Builder(&*BB); // BB = Function::iterator OR IRBuilder<> >> Builder(CallInst->getParent()); >> Builder.SetInsertPoint(CallInst); >> InstructionClass *YourNewInstruction = builder.CreateInstructionClass(.....); >> // InstructionClass = type of instruction you are inserting >> >> >> I’m not sure how the IRBuilder would work at the MI level, as Shucai was >> asking. >> >> >> >> >> On Sat, Sep 3, 2016 at 6...

...;llvm-dev at lists.llvm.org> wrote: >> >> So one way might look like this: >> >> IRBuilder<> Builder(&*BB); // BB = Function::iterator OR IRBuilder<> Builder(CallInst->getParent()); >> Builder.SetInsertPoint(CallInst); >> InstructionClass *YourNewInstruction = builder.CreateInstructionClass(.....); // InstructionClass = type of instruction you are inserting >> > > I’m not sure how the IRBuilder would work at the MI level, as Shucai was asking. > >> >> >> >> On Sat, Sep 3, 2016 at 6:04 PM, Ryan Taylor <...

I'm trying to insert some instructions before each function calls (before arguments push): lea %EAX, label ----- new instructions mov [ESP+stacksize], %EAX ----- new instructions push arg1 push arg2 ... push argn call callee_name I am a newbie to LLVM. I tried to use buildMI() to insert the instructions in the lowercall() function. But I couldn't