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Add unstable -Z direct-access-external-data cmdline flag for rustc

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The new flag has been described in the Major Change Proposal at
https://github.com/rust-lang/compiler-team/issues/707
This commit is contained in:
WANG Rui 2023-12-14 22:07:53 +08:00
parent 94807670a6
commit 06a41687b1
8 changed files with 74 additions and 10 deletions
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11
compiler/rustc_target/src/spec/mod.rs
View file

@ -1885,6 +1885,8 @@ pub struct TargetOptions {
/// passed, and cannot be disabled even via `-C`. Corresponds to `llc
/// -mattr=$features`.
pub features: StaticCow<str>,
/// Direct or use GOT indirect to reference external data symbols
pub direct_access_external_data: Option<bool>,
/// Whether dynamic linking is available on this target. Defaults to false.
pub dynamic_linking: bool,
/// Whether dynamic linking can export TLS globals. Defaults to true.
@ -2279,6 +2281,7 @@ impl Default for TargetOptions {
asm_args: cvs![],
cpu: "generic".into(),
features: "".into(),
direct_access_external_data: None,
dynamic_linking: false,
dll_tls_export: true,
only_cdylib: false,
@ -2575,6 +2578,12 @@ impl Target {
base.$key_name = s as u32;
}
} );
($key_name:ident, Option<bool>) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove(&name).and_then(|b| b.as_bool()) {
base.$key_name = Some(s);
}
} );
($key_name:ident, Option<u64>) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove(&name).and_then(|b| b.as_u64()) {
@ -3003,6 +3012,7 @@ impl Target {
key!(cpu);
key!(features);
key!(dynamic_linking, bool);
key!(direct_access_external_data, Option<bool>);
key!(dll_tls_export, bool);
key!(only_cdylib, bool);
key!(executables, bool);
@ -3257,6 +3267,7 @@ impl ToJson for Target {
target_option_val!(cpu);
target_option_val!(features);
target_option_val!(dynamic_linking);
target_option_val!(direct_access_external_data);
target_option_val!(dll_tls_export);
target_option_val!(only_cdylib);
target_option_val!(executables);

1
compiler/rustc_target/src/spec/targets/loongarch64_unknown_linux_gnu.rs
View file

@ -11,6 +11,7 @@ pub fn target() -> Target {
features: "+f,+d".into(),
llvm_abiname: "lp64d".into(),
max_atomic_width: Some(64),
direct_access_external_data: Some(false),
..base::linux_gnu::opts()
},
}