[llvm-dev] Remove some x86-64 addressing modes of IMUL and ADD instructions

[Abhinav Jangda via llvm-dev]

Hello everyone,

For some project, I need to remove some addressing modes of operands in
IMUL and ADD instructions. More specifically, I do not want LLVM to
generate instruction like:

*imull    (%r9,%r11), %r15d*

Instead I will like LLVM to generate code which first loads address into a
register and then multiply it, i.e., something like:

*movl (%r9, %r11), %r10d*
*imull %r10d, %r15d*

I have remove all *IMUL64rm *and *IMUL64rmi* instructions in
Target/X86/X86InstrArithmetic.td, but still *imull* instruction with memory
operand is generated. Can anyone please point me to the write place?
I will prefer a solution related to llvm6.0, however, solution for any llvm
version is welcome.

Thank You,

Abhinav Jangda
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