LLVM ERROR about f128 on AIX and SPARC32 when building core without optimization

[taiki-e]

Code

I tried this code:

#![no_std]
// empty

With cargo build -Z build-std=core --target powerpc64-ibm-aix:

rustc-LLVM ERROR: f128 is unimplemented on AIX.
error: could not compile `core` (lib)

With cargo build -Z build-std=core --target sparc-unknown-none-elf:

rustc-LLVM ERROR: SPARCv8 does not handle f128 in calls; pass indirectly
error: could not compile `core` (lib)

I expected to see this happen: no error

I suspect the same problem exists with the other targets listed here: https://github.com/rust-lang/compiler-builtins/blob/a09218f1c4d23ffbd97d68f0fefb5feed2469dc5/configure.rs#L82-L91

Workaround: Passing --release flag resolves error.

Version it worked on

It most recently worked on: nightly-2024-11-13

Version with regression

nightly-2024-11-14

rustc --version --verbose:

rustc 1.84.0-nightly (8adb4b30f 2024-11-13)
binary: rustc
commit-hash: 8adb4b30f40e6fbd21dc1ba26c3301c7eeb6de3c
commit-date: 2024-11-13
host: aarch64-apple-darwin
release: 1.84.0-nightly
LLVM version: 19.1.3

@rustbot label +regression-from-stable-to-nightly -regression-untriaged

[taiki-e]

Considering this comment, I suspect it is a regression introduced by #132662.
cc @tgross35 @RalfJung

[taiki-e]

I suspect it is a regression introduced by #132662.

I confirmed that reverting this PR's change fixes the problem locally.