1 files changed, 60 insertions, 0 deletions
diff --git a/compiler/rustc_public/src/target.rs b/compiler/rustc_public/src/target.rs
new file mode 100644
index 00000000000..32c3a2a9122
--- /dev/null
+++ b/compiler/rustc_public/src/target.rs
@@ -0,0 +1,60 @@
+//! Provide information about the machine that this is being compiled into.
+
+use serde::Serialize;
+
+use crate::compiler_interface::with;
+
+/// The properties of the target machine being compiled into.
+#[derive(Clone, PartialEq, Eq, Serialize)]
+pub struct MachineInfo {
+    pub endian: Endian,
+    pub pointer_width: MachineSize,
+}
+
+impl MachineInfo {
+    pub fn target() -> MachineInfo {
+        with(|cx| cx.target_info())
+    }
+
+    pub fn target_endianness() -> Endian {
+        with(|cx| cx.target_info().endian)
+    }
+
+    pub fn target_pointer_width() -> MachineSize {
+        with(|cx| cx.target_info().pointer_width)
+    }
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, Serialize)]
+pub enum Endian {
+    Little,
+    Big,
+}
+
+/// Represent the size of a component.
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Serialize)]
+pub struct MachineSize {
+    num_bits: usize,
+}
+
+impl MachineSize {
+    #[inline(always)]
+    pub fn bytes(self) -> usize {
+        self.num_bits / 8
+    }
+
+    #[inline(always)]
+    pub fn bits(self) -> usize {
+        self.num_bits
+    }
+
+    #[inline(always)]
+    pub fn from_bits(num_bits: usize) -> MachineSize {
+        MachineSize { num_bits }
+    }
+
+    #[inline]
+    pub fn unsigned_int_max(self) -> Option<u128> {
+        (self.num_bits <= 128).then(|| u128::MAX >> (128 - self.bits()))
+    }
+}