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Auto merge of #116672 - maurer:128-align, r=nikic

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LLVM 18 x86 data layout update

With https://reviews.llvm.org/D86310 LLVM now has i128 aligned to 16-bytes on x86 based platforms. This will be in LLVM-18. This patch updates all our spec targets to be 16-byte aligned, and removes the alignment when speaking to older LLVM.

This results in Rust overaligning things relative to LLVM on older LLVMs.

This implements MCP https://github.com/rust-lang/compiler-team/issues/683.

See #54341
This commit is contained in:
bors 2024-01-20 00:56:53 +00:00
commit 0547c41f90
58 changed files with 213 additions and 92 deletions
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8
compiler/rustc_ast/src/ast.rs
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@ -3304,9 +3304,13 @@ mod size_asserts {
static_assert_size!(Impl, 136);
static_assert_size!(Item, 136);
static_assert_size!(ItemKind, 64);
static_assert_size!(LitKind, 24);
// This can be removed after i128:128 is in the bootstrap compiler's target.
#[cfg(not(bootstrap))]
static_assert_size!(LitKind, 32);
static_assert_size!(Local, 72);
static_assert_size!(MetaItemLit, 40);
// This can be removed after i128:128 is in the bootstrap compiler's target.
#[cfg(not(bootstrap))]
static_assert_size!(MetaItemLit, 48);
static_assert_size!(Param, 40);
static_assert_size!(Pat, 72);
static_assert_size!(Path, 24);