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Use probe-stack=inline-asm in LLVM 11+

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This commit is contained in:
Erik Desjardins
2020-10-12 22:33:27 -04:00
parent e38fb306b7
commit cd25807223
7 changed files with 63 additions and 11 deletions
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11
compiler/rustc_codegen_llvm/src/attributes.rs
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@@ -127,13 +127,18 @@ fn set_probestack(cx: &CodegenCx<'ll, '_>, llfn: &'ll Value) {
return;
}
// Flag our internal `__rust_probestack` function as the stack probe symbol.
// This is defined in the `compiler-builtins` crate for each architecture.
llvm::AddFunctionAttrStringValue(
llfn,
llvm::AttributePlace::Function,
const_cstr!("probe-stack"),
const_cstr!("__rust_probestack"),
if llvm_util::get_version() < (11, 0, 1) {
// Flag our internal `__rust_probestack` function as the stack probe symbol.
// This is defined in the `compiler-builtins` crate for each architecture.
const_cstr!("__rust_probestack")
} else {
// On LLVM 11+, emit inline asm for stack probes instead of a function call.
const_cstr!("inline-asm")
},
);
}