[clang] [clang][utils] Add auto mode to reduction script (PR #163282)
Arthur Eubanks via cfe-commits
cfe-commits at lists.llvm.org
Wed Oct 15 16:14:41 PDT 2025
================
@@ -424,11 +490,76 @@ def run_creduce(self):
print("\n\nctrl-c detected, killed reduction tool")
p.kill()
+ def run_llvm_reduce(self):
+ full_llvm_reduce_cmd = [
+ llvm_reduce_cmd,
+ f"--test={self.testfile}",
+ self.ir_file,
+ ]
+ print("\nRunning llvm-reduce tool...")
+ verbose_print(quote_cmd(full_llvm_reduce_cmd))
+ try:
+ p = subprocess.Popen(full_llvm_reduce_cmd)
+ p.communicate()
+ except KeyboardInterrupt:
+ # Hack to kill C-Reduce because it jumps into its own pgid
+ print("\n\nctrl-c detected, killed reduction tool")
+ p.kill()
+
+ def classify_crash(self) -> FailureType:
+ print("classifying crash ...")
+ if self.check_expected_output(args=self.clang_args + ["-fsyntax-only"]):
+ print("Found Frontend Crash")
+ return FailureType.FrontEnd
+
+ print("Found Middle/Backend failure")
+ args = self.clang_args + [
+ "-mllvm",
+ "--print-on-crash",
----------------
aeubanks wrote:
at some point we should also incorporate `llvm/utils/reduce_pipeline.py`, but that's for the future
https://github.com/llvm/llvm-project/pull/163282
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