https://bugs.llvm.org/show_bug.cgi?id=42763
Bug ID: 42763
Summary: r358919 causing boot failures for MIPS Linux kernel
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: MIPS
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Blocks: 4068
Reported via:
https://github.com/ClangBuiltLinux/linux/issues/610#issuecomment-515197978
It seems that with clang-8, we can boot a working MIPS linux kernel.
It fails to boot with clang-9, seemingly due to r358919 commit d748689c7f71
("[InstCombine] Eliminate stores to constant memory").
The particular optimization sounds like it may be potentially dangerous; maybe
the kernel is exercising such an unconsidered case?
Referenced Bugs:
https://bugs.llvm.org/show_bug.cgi?id=4068
[Bug 4068] [Meta] Compiling the Linux kernel with clang
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