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| author | Simonas Kazlauskas <git@kazlauskas.me> | 2021-06-26 23:53:35 +0300 |
|---|---|---|
| committer | Simonas Kazlauskas <git@kazlauskas.me> | 2021-06-30 19:45:17 +0300 |
| commit | 9b67cba4f6294e0db900397cdf5c59c1dc901ade (patch) | |
| tree | 5f9e9ce96b1e1c32d448d8daa1ba0c9f18bb947e /compiler/rustc_codegen_ssa | |
| parent | 3ddb78a34608848a60f6ca5b6ccfde8340302372 (diff) | |
| download | rust-9b67cba4f6294e0db900397cdf5c59c1dc901ade.tar.gz rust-9b67cba4f6294e0db900397cdf5c59c1dc901ade.zip | |
Add support for leaf fn frame pointer elimination
This PR adds ability for the target specifications to specify frame pointer emission type that's not just “always” or “whatever cg decides”. In particular there's a new mode that allows omission of the frame pointer for leaf functions (those that don't call any other functions). We then set this new mode for Aarch64-based Apple targets. Fixes #86196
Diffstat (limited to 'compiler/rustc_codegen_ssa')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/base.rs | 2 | ||||
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/traits/misc.rs | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs index 38ab39febe0..9e1e4c0c817 100644 --- a/compiler/rustc_codegen_ssa/src/base.rs +++ b/compiler/rustc_codegen_ssa/src/base.rs @@ -406,7 +406,7 @@ pub fn maybe_create_entry_wrapper<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( }; // `main` should respect same config for frame pointer elimination as rest of code - cx.set_frame_pointer_elimination(llfn); + cx.set_frame_pointer_type(llfn); cx.apply_target_cpu_attr(llfn); let llbb = Bx::append_block(&cx, llfn, "top"); diff --git a/compiler/rustc_codegen_ssa/src/traits/misc.rs b/compiler/rustc_codegen_ssa/src/traits/misc.rs index 6fff64bfcb6..46f2adbe552 100644 --- a/compiler/rustc_codegen_ssa/src/traits/misc.rs +++ b/compiler/rustc_codegen_ssa/src/traits/misc.rs @@ -16,7 +16,7 @@ pub trait MiscMethods<'tcx>: BackendTypes { fn sess(&self) -> &Session; fn codegen_unit(&self) -> &'tcx CodegenUnit<'tcx>; fn used_statics(&self) -> &RefCell<Vec<Self::Value>>; - fn set_frame_pointer_elimination(&self, llfn: Self::Function); + fn set_frame_pointer_type(&self, llfn: Self::Function); fn apply_target_cpu_attr(&self, llfn: Self::Function); fn create_used_variable(&self); /// Declares the extern "C" main function for the entry point. Returns None if the symbol already exists. |