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update some compiler-rt dce protection

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Brendan Hansknecht 2024-02-08 11:52:25 -08:00
parent d62cc0b1d3
commit 738a3b5282
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1 changed files with 6 additions and 4 deletions
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crates/compiler/gen_llvm/src/llvm/build.rs
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@ -1071,17 +1071,19 @@ pub fn module_from_builtins<'ctx>(
// Anything not depended on by a `roc_builtin.` function could already by DCE'd theoretically.
// That said, this workaround is good enough and fixes compilations times.
// Also, must_keep is the functions we depend on that would normally be provide by libc.
// Also, must_keep is the functions we depend on that would normally be provide by libc or compiler-rt.
// They are magically linked to by llvm builtins, so we must specify that they can't be DCE'd.
let must_keep = [
// Windows special required when floats are used
"_fltused",
// From libc
"floorf",
"memcpy",
"memset",
// I have no idea why this function is special.
// Without it, some tests hang on M1 mac outside of nix.
// From compiler-rt
"__divti3",
"__modti3",
"__muloti4",
// fixes `Undefined Symbol in relocation`
"__udivti3",
// Roc special functions
"__roc_force_longjmp",