https://llvm.org/bugs/show_bug.cgi?id=28786
Bug ID: 28786
Summary: Long hang (infinite loop?) with -msan-keep-going
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Register Allocator
Assignee: unassignedb...@nondot.org
Reporter: sph...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Attempting to compile the attached file with this command line:
clang++ -std=gnu++11 -x c++ -o hang-regalloc.o hang-regalloc.i -fPIC
-fsanitize=memory -fsanitize-recover=memory -fsanitize-memory-track-origins
-mllvm -msan-keep-going -fno-rtti -fno-exceptions -fno-math-errno
-Qunused-arguments -pthread -pipe -gline-tables-only -O3
-fno-omit-frame-pointer -Wno-invalid-offsetof
hangs for as long as I've ever bothered to wait (at least half an hour).
Attaching with gdb shows that it is doing stuff, but the call
llvm::RegAllocBase::allocatePhysRegs()
never finishes.
% clang++ --version
clang version 3.8.0 (tags/RELEASE_380/final) (llvm/tags/RELEASE_380/final
262557)
Target: x86_64-unknown-linux-gnu
Thread model: posix
I have not tried with any other version.
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