120 lines
4.0 KiB
Python
120 lines
4.0 KiB
Python
import os
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import re
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import sys
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import subprocess
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from os import walk
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LLVM_PATH = llvm_path = os.path.join(
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os.path.dirname(os.path.abspath(__file__)),
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"llvm-project",
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)
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def run_command(command, cwd=None):
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p = subprocess.Popen(command, cwd=cwd)
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if p.wait() != 0:
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print("command `{}` failed...".format(" ".join(command)))
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sys.exit(1)
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def clone_llvm_repository():
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if os.path.exists(LLVM_PATH):
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while True:
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choice = input("There is already a llvm-project folder, do you want to update it? [y/N]")
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if choice == "" or choice.lower() == "n":
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print("Skipping repository update.")
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return
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elif choice.lower() == "y":
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print("Updating repository...")
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run_command(["git", "pull", "origin"], cwd="llvm-project")
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return
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else:
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print("Didn't understand answer...")
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print("Cloning LLVM repository...")
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run_command(["git", "clone", "https://github.com/llvm/llvm-project", "--depth", "1", LLVM_PATH])
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def extract_instrinsics(intrinsics, file):
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print("Extracting intrinsics from `{}`...".format(file))
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with open(file, "r", encoding="utf8") as f:
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content = f.read()
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lines = content.splitlines()
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pos = 0
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current_arch = None
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while pos < len(lines):
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line = lines[pos].strip()
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if line.startswith("let TargetPrefix ="):
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current_arch = line.split('"')[1].strip()
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if len(current_arch) == 0:
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current_arch = None
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elif current_arch is None:
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pass
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elif line == "}":
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current_arch = None
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elif line.startswith("def "):
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content = ""
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while not content.endswith(";") and pos < len(lines):
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line = lines[pos].split(" // ")[0].strip()
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content += line
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pos += 1
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entries = re.findall('GCCBuiltin<"(\\w+)">', content)
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if len(entries) > 0:
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intrinsic = content.split(":")[0].split(" ")[1].strip()
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intrinsic = intrinsic.split("_")
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if len(intrinsic) < 2 or intrinsic[0] != "int":
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continue
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intrinsic[0] = "llvm"
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intrinsic = ".".join(intrinsic)
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if current_arch not in intrinsics:
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intrinsics[current_arch] = []
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for entry in entries:
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intrinsics[current_arch].append('"{}" => "{}",'.format(intrinsic, entry))
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continue
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pos += 1
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continue
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print("Done!")
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def update_intrinsics():
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files = []
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intrinsics_path = os.path.join(LLVM_PATH, "llvm/include/llvm/IR")
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for (dirpath, dirnames, filenames) in walk(intrinsics_path):
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files.extend([os.path.join(intrinsics_path, f) for f in filenames if f.endswith(".td")])
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intrinsics = {}
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for file in files:
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extract_instrinsics(intrinsics, file)
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archs = [arch for arch in intrinsics]
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archs.sort()
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output_file = os.path.join(
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os.path.dirname(os.path.abspath(__file__)),
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"../src/intrinsic/archs.rs",
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)
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print("Updating content of `{}`...".format(output_file))
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with open(output_file, "w", encoding="utf8") as out:
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out.write("// File generated by `rustc_codegen_gcc/tools/generate_intrinsics.py`\n")
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out.write("// DO NOT EDIT IT!\n")
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out.write("match name {\n")
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for arch in archs:
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if len(intrinsics[arch]) == 0:
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continue
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intrinsics[arch].sort()
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out.write(' // {}\n'.format(arch))
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out.write('\n'.join([' {}'.format(x) for x in intrinsics[arch]]))
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out.write('\n')
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out.write(' _ => unimplemented!("***** unsupported LLVM intrinsic {}", name),\n')
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out.write("}\n")
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print("Done!")
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def main():
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# First, we clone the LLVM repository if it's not already here.
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clone_llvm_repository()
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update_intrinsics()
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if __name__ == "__main__":
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sys.exit(main())
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