Place intrinsics in individual object files (#349)
Co-authored-by: Tomasz Miąsko <tomasz.miasko@gmail.com>
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@ -173,14 +173,12 @@ macro_rules! intrinsics {
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#[cfg(all(windows, target_arch = "x86_64"))]
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pub mod $name {
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intrinsics! {
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pub extern $abi fn $name( $($argname: $ty),* )
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-> ::macros::win64_128bit_abi_hack::U64x2
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{
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let e: $ret = super::$name($($argname),*);
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::macros::win64_128bit_abi_hack::U64x2::from(e)
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}
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#[cfg_attr(not(feature = "mangled-names"), no_mangle)]
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pub extern $abi fn $name( $($argname: $ty),* )
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-> ::macros::win64_128bit_abi_hack::U64x2
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{
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let e: $ret = super::$name($($argname),*);
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::macros::win64_128bit_abi_hack::U64x2::from(e)
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}
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}
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@ -209,17 +207,23 @@ macro_rules! intrinsics {
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$($rest:tt)*
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) => (
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#[cfg(target_arch = "arm")]
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#[cfg_attr(not(feature = "mangled-names"), no_mangle)]
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pub extern $abi fn $name( $($argname: $ty),* ) -> $ret {
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$($body)*
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}
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#[cfg(target_arch = "arm")]
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pub mod $name {
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intrinsics! {
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pub extern "aapcs" fn $alias( $($argname: $ty),* ) -> $ret {
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super::$name($($argname),*)
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}
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#[cfg_attr(not(feature = "mangled-names"), no_mangle)]
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pub extern $abi fn $name( $($argname: $ty),* ) -> $ret {
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super::$name($($argname),*)
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}
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}
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#[cfg(target_arch = "arm")]
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pub mod $alias {
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#[cfg_attr(not(feature = "mangled-names"), no_mangle)]
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pub extern "aapcs" fn $alias( $($argname: $ty),* ) -> $ret {
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super::$name($($argname),*)
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}
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}
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@ -234,9 +238,15 @@ macro_rules! intrinsics {
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intrinsics!($($rest)*);
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);
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// This is the final catch-all rule. At this point we just generate an
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// This is the final catch-all rule. At this point we generate an
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// intrinsic with a conditional `#[no_mangle]` directive to avoid
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// interfereing with duplicate symbols and whatnot during testing.
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// interfering with duplicate symbols and whatnot during testing.
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//
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// The implementation is placed in a separate module, to take advantage
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// of the fact that rustc partitions functions into code generation
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// units based on module they are defined in. As a result we will have
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// a separate object file for each intrinsic. For further details see
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// corresponding PR in rustc https://github.com/rust-lang/rust/pull/70846
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//
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// After the intrinsic is defined we just continue with the rest of the
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// input we were given.
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@ -249,11 +259,18 @@ macro_rules! intrinsics {
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$($rest:tt)*
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) => (
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$(#[$($attr)*])*
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#[cfg_attr(not(feature = "mangled-names"), no_mangle)]
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pub extern $abi fn $name( $($argname: $ty),* ) -> $ret {
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$($body)*
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}
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pub mod $name {
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$(#[$($attr)*])*
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#[cfg_attr(not(feature = "mangled-names"), no_mangle)]
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pub extern $abi fn $name( $($argname: $ty),* ) -> $ret {
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super::$name($($argname),*)
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}
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}
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intrinsics!($($rest)*);
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);
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}
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