I am trying to modify the llc in that way:
subf 3, 5, 3 subf 3, 5, 3
stw 3, 44(1) stw 3, 44(1)
lwz 3, 44(1) lwz 3, 44(1)
cmpwi 0, 3, -1 cmpwi 0, 3, -1
I would like to insert Code (like the isync) in the asm output of the llc. What is the best way, or easiest to do this.
llc –filetype=asm –march=ppc32 -o=test.s test.bc
With best regards,
Well, inlined assembly, of course. Make sure to mark it as "volatile".
Ok und how can I add inlined assembly to the output?
If you're compiling this from C source code, use the "__asm__
__volatile__ ("isync");" syntax. If you're generating straight LLVM
IR, then I'm not entirely sure. You'll have to create some type of
CallInst instruction. See TreeToLLVM::EmitASM_EXPR() in the LLVM-GCC
gcc/llvm-convert.cpp file for an example of how it generates one of