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Target stack-probe support configurable finely

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This adds capability to configure the target's stack probe support in a
more precise manner than just on/off. In particular now we allow
choosing between always inline-asm, always call or either one of those
depending on the LLVM version on a per-target basis.
This commit is contained in:
Simonas Kazlauskas
2021-01-09 16:54:20 +02:00
parent efdb859dcd
commit 007080b607
35 changed files with 203 additions and 87 deletions
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4
compiler/rustc_target/src/spec/i686_unknown_linux_gnu.rs
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@@ -1,11 +1,11 @@
use crate::spec::{LinkerFlavor, Target};
use crate::spec::{LinkerFlavor, StackProbeType, Target};
pub fn target() -> Target {
let mut base = super::linux_gnu_base::opts();
base.cpu = "pentium4".to_string();
base.max_atomic_width = Some(64);
base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m32".to_string());
base.stack_probes = true;
base.stack_probes = StackProbeType::InlineOrCall { min_llvm_version_for_inline: (11, 0, 1) };
Target {
llvm_target: "i686-unknown-linux-gnu".to_string(),