"""
Useful options to debug LLVM passes
llvm.set_option("test", "-debug-pass=Details")
llvm.set_option("test", "-debug-pass=Executions")
llvm.set_option("test", "-debug-pass=Arguments")
llvm.set_option("test", "-debug-pass=Structure")
llvm.set_option("test", "-debug-only=loop-vectorize")
llvm.set_option("test", "-help-hidden")
"""
from llvmlite import binding as llvm
def _inlining_threshold(optlevel, sizelevel=0):
"""
Compute the inlining threshold for the desired optimisation level
Refer to http://llvm.org/docs/doxygen/html/InlineSimple_8cpp_source.html
"""
if optlevel > 2:
return 275
# -Os
if sizelevel == 1:
return 75
# -Oz
if sizelevel == 2:
return 25
return 225
def create_pass_manager_builder(opt=2, loop_vectorize=False,
slp_vectorize=False):
"""
Create an LLVM pass manager with the desired optimisation level and options.
"""
pmb = llvm.create_pass_manager_builder()
pmb.opt_level = opt
pmb.loop_vectorize = loop_vectorize
pmb.slp_vectorize = slp_vectorize
pmb.inlining_threshold = _inlining_threshold(opt)
return pmb