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Use function attribute "frame-pointer" instead of "no-frame-pointer-elim"

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LLVM 8 (D56351) introduced "frame-pointer". In LLVM 10 (D71863),
"no-frame-pointer-elim"/"no-frame-pointer-elim-non-leaf" will be
ignored.
This commit is contained in:
Fangrui Song 2019-12-30 21:35:13 -08:00
parent a9dd56ff9a
commit b40dc30a3e
3 changed files with 19 additions and 9 deletions
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21
src/librustc_codegen_llvm/attributes.rs
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@ -66,12 +66,21 @@ fn naked(val: &'ll Value, is_naked: bool) {
pub fn set_frame_pointer_elimination(cx: &CodegenCx<'ll, '_>, llfn: &'ll Value) {
if cx.sess().must_not_eliminate_frame_pointers() {
llvm::AddFunctionAttrStringValue(
llfn,
llvm::AttributePlace::Function,
const_cstr!("no-frame-pointer-elim"),
const_cstr!("true"),
);
if llvm_util::get_major_version() >= 8 {
llvm::AddFunctionAttrStringValue(
llfn,
llvm::AttributePlace::Function,
const_cstr!("frame-pointer"),
const_cstr!("all"),
);
} else {
llvm::AddFunctionAttrStringValue(
llfn,
llvm::AttributePlace::Function,
const_cstr!("no-frame-pointer-elim"),
const_cstr!("true"),
);
}
}
}