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De-LLVM the unchecked shifts [MCP#693]

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This is just one part of the MCP, 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.
This commit is contained in:
Scott McMurray 2024-03-30 00:36:45 -07:00
parent 69fa40cb48
commit 0601f0c66d
32 changed files with 405 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))
}