[llvm] [LLVM] Precise error message for intrinisic signature verification (1/n) (PR #196802)

[Rahul Joshi via llvm-commits]

jurahul wrote:

As mentioned in the PR description, this just covers the basic fixed types. I'll add support for overloaded types and dependent types over the next few PRs, but wanted to get some basic checks reviewed and merged before I work on that.

https://github.com/llvm/llvm-project/pull/196802