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Rollup merge of #123226 - scottmcm:u32-shifts, r=WaffleLapkin

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De-LLVM the unchecked shifts [MCP#693]

This is just one part of the MCP (https://github.com/rust-lang/compiler-team/issues/693), but it's the one that IMHO removes the most noise from the standard library code.

Seems net simpler this way, since MIR already supported heterogeneous shifts anyway, and thus it's not more work for backends than before.

r? WaffleLapkin
This commit is contained in:
Matthias Krüger 2024-04-02 21:22:01 +02:00 • committed by GitHub
commit 1b0e46f8a0
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32 changed files with 408 additions and 576 deletions
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5
compiler/rustc_hir_analysis/src/check/intrinsic.rs
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@ -454,9 +454,8 @@ pub fn check_intrinsic_type(
sym::unchecked_div | sym::unchecked_rem | sym::exact_div => {
(1, 0, vec![param(0), param(0)], param(0))
}
sym::unchecked_shl | sym::unchecked_shr | sym::rotate_left | sym::rotate_right => {
(1, 0, vec![param(0), param(0)], param(0))
}
sym::unchecked_shl | sym::unchecked_shr => (2, 0, vec![param(0), param(1)], param(0)),
sym::rotate_left | sym::rotate_right => (1, 0, vec![param(0), param(0)], param(0)),
sym::unchecked_add | sym::unchecked_sub | sym::unchecked_mul => {
(1, 0, vec![param(0), param(0)], param(0))
}