behavior tests are tripping an LLVM assertion on mips-linux: Invalid shift amount

[andrewrk]

Zig Version

0.11.0-dev.526+9e74e4c1f

Steps to Reproduce and Observed Behavior

Reproduction requires an LLVM built with assertions enabled. This is documented in the wiki and these assertions are one of the reasons it is recommended to work on the Zig compiler with an LLVM source build rather than the one provided by a system package.

$ stage4/bin/zig test ../test/behavior.zig -I../test -target mips-linux-none
LLVM Emit Object... zig: /home/andy/Downloads/llvm-project-15/llvm/include/llvm/ADT/APInt.h:840: void llvm::APInt::lshrInPlace(unsigned int): Assertion `ShiftAmt <= BitWidth && "Invalid shift amount"' failed.

Expected Behavior

Expected the behavior tests to pass.

[jacobly0]

This appears to be an upstream llvm bug with global non-zero vectors that aren't a multiple of a byte on big-endian targets.

repro

target triple = "mips"
@g = constant <1 x i1> <i1 true>

[nektro]

nice find, upstream llvm/llvm-project#59055