Update upstream source from tag 'upstream/1.52.1+dfsg1'

[rustc.git] / vendor / rustc-ap-rustc_target / src / spec / abi.rs

diff --git a/vendor/rustc-ap-rustc_target/src/spec/abi.rs b/vendor/rustc-ap-rustc_target/src/spec/abi.rs
new file mode 100644 (file)
index 0000000..65e8a4e
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+++ b/vendor/rustc-ap-rustc_target/src/spec/abi.rs
@@ -0,0 +1,127 @@
+use std::fmt;
+
+use rustc_macros::HashStable_Generic;
+
+#[cfg(test)]
+mod tests;
+
+#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, Debug)]
+#[derive(HashStable_Generic, Encodable, Decodable)]
+pub enum Abi {
+    // N.B., this ordering MUST match the AbiDatas array below.
+    // (This is ensured by the test indices_are_correct().)
+
+    // Multiplatform / generic ABIs
+    //
+    // These ABIs come first because every time we add a new ABI, we
+    // have to re-bless all the hashing tests. These are used in many
+    // places, so giving them stable values reduces test churn. The
+    // specific values are meaningless.
+    Rust = 0,
+    C = 1,
+
+    // Single platform ABIs
+    Cdecl,
+    Stdcall,
+    Fastcall,
+    Vectorcall,
+    Thiscall,
+    Aapcs,
+    Win64,
+    SysV64,
+    PtxKernel,
+    Msp430Interrupt,
+    X86Interrupt,
+    AmdGpuKernel,
+    EfiApi,
+    AvrInterrupt,
+    AvrNonBlockingInterrupt,
+    CCmseNonSecureCall,
+
+    // Multiplatform / generic ABIs
+    System,
+    RustIntrinsic,
+    RustCall,
+    PlatformIntrinsic,
+    Unadjusted,
+}
+
+#[derive(Copy, Clone)]
+pub struct AbiData {
+    abi: Abi,
+
+    /// Name of this ABI as we like it called.
+    name: &'static str,
+
+    /// A generic ABI is supported on all platforms.
+    generic: bool,
+}
+
+#[allow(non_upper_case_globals)]
+const AbiDatas: &[AbiData] = &[
+    // Cross-platform ABIs
+    AbiData { abi: Abi::Rust, name: "Rust", generic: true },
+    AbiData { abi: Abi::C, name: "C", generic: true },
+    // Platform-specific ABIs
+    AbiData { abi: Abi::Cdecl, name: "cdecl", generic: false },
+    AbiData { abi: Abi::Stdcall, name: "stdcall", generic: false },
+    AbiData { abi: Abi::Fastcall, name: "fastcall", generic: false },
+    AbiData { abi: Abi::Vectorcall, name: "vectorcall", generic: false },
+    AbiData { abi: Abi::Thiscall, name: "thiscall", generic: false },
+    AbiData { abi: Abi::Aapcs, name: "aapcs", generic: false },
+    AbiData { abi: Abi::Win64, name: "win64", generic: false },
+    AbiData { abi: Abi::SysV64, name: "sysv64", generic: false },
+    AbiData { abi: Abi::PtxKernel, name: "ptx-kernel", generic: false },
+    AbiData { abi: Abi::Msp430Interrupt, name: "msp430-interrupt", generic: false },
+    AbiData { abi: Abi::X86Interrupt, name: "x86-interrupt", generic: false },
+    AbiData { abi: Abi::AmdGpuKernel, name: "amdgpu-kernel", generic: false },
+    AbiData { abi: Abi::EfiApi, name: "efiapi", generic: false },
+    AbiData { abi: Abi::AvrInterrupt, name: "avr-interrupt", generic: false },
+    AbiData {
+        abi: Abi::AvrNonBlockingInterrupt,
+        name: "avr-non-blocking-interrupt",
+        generic: false,
+    },
+    AbiData { abi: Abi::CCmseNonSecureCall, name: "C-cmse-nonsecure-call", generic: false },
+    // Cross-platform ABIs
+    AbiData { abi: Abi::System, name: "system", generic: true },
+    AbiData { abi: Abi::RustIntrinsic, name: "rust-intrinsic", generic: true },
+    AbiData { abi: Abi::RustCall, name: "rust-call", generic: true },
+    AbiData { abi: Abi::PlatformIntrinsic, name: "platform-intrinsic", generic: true },
+    AbiData { abi: Abi::Unadjusted, name: "unadjusted", generic: true },
+];
+
+/// Returns the ABI with the given name (if any).
+pub fn lookup(name: &str) -> Option<Abi> {
+    AbiDatas.iter().find(|abi_data| name == abi_data.name).map(|&x| x.abi)
+}
+
+pub fn all_names() -> Vec<&'static str> {
+    AbiDatas.iter().map(|d| d.name).collect()
+}
+
+impl Abi {
+    #[inline]
+    pub fn index(self) -> usize {
+        self as usize
+    }
+
+    #[inline]
+    pub fn data(self) -> &'static AbiData {
+        &AbiDatas[self.index()]
+    }
+
+    pub fn name(self) -> &'static str {
+        self.data().name
+    }
+
+    pub fn generic(self) -> bool {
+        self.data().generic
+    }
+}
+
+impl fmt::Display for Abi {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "\"{}\"", self.name())
+    }
+}