https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236120
Bug ID: 236120
Summary: Failure to buildworld for TARGET_ARCH=armv7
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: b...@freebsd.org
Reporter: kev...@freebsd.org
Created attachment 202468
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=202468&action=edit
Reproducer for cross-build core dump
It's unclear when this started, but it's worked at some point in the last month
or two on -current. With this cc (build from middle of 2019/02/28):
root@shiva:/tmp# cc --version
FreeBSD clang version 7.0.1 (tags/RELEASE_701/final 349250) (based on LLVM
7.0.1)
Target: x86_64-unknown-freebsd13.0
Thread model: posix
InstalledDir: /usr/bin
root@shiva:/usr/src# make TARGET_ARCH=armv7 buildworld
[...]
Error: Super register $eax of reserved register $hax is not reserved.
Assertion failed: (checkAllSuperRegsMarked(Reserved, {X86::SIL, X86::DIL,
X86::BPL, X86::SPL, X86::SIH, X86::DIH, X86::BPH, X86::SPH})), function
getReservedRegs, file /usr/src/contrib/llvm/lib/Target/X86/X86RegisterInfo.cpp,
line 582.
Abort trap (core dumped)
Reproducible on two different machines so far, one virtual and one physical.
The cause is unclear, but attaching the reproducers that it spit out.
Reproduces regardless of what it compiles first -- in this case, nvlist with a
clean objdir.
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