[llvm-branch-commits] [llvm] [AMDGPU] Fix instruction size for 64-bit literal constant operands (PR #180387)

[Shilei Tian via llvm-branch-commits]

shiltian wrote:

The reproducer shows the impact of a mismatched instruction size between `MachineInstr` and `MCInst`, which came from a downstream build failure. Ideally, I'd like to just test the two sizes, but I'm not sure how to do that.

https://github.com/llvm/llvm-project/pull/180387