Initial target specification for aarch64-apple-tvos-sim

compiler/rustc_target/src/spec/aarch64_apple_tvos_sim.rs

@@ -0,0 +1,33 @@
+use super::apple_base::{opts, tvos_sim_llvm_target, Arch};
+use crate::spec::{FramePointer, SanitizerSet, Target, TargetOptions};
+
+pub fn target() -> Target {
+    let arch = Arch::Arm64_sim;
+    let mut base = opts("ios", arch);
+    base.supported_sanitizers = SanitizerSet::ADDRESS | SanitizerSet::THREAD;
+    Target {
+        llvm_target: tvos_sim_llvm_target(arch).into(),
+        pointer_width: 64,
+        data_layout: "e-m:o-i64:64-i128:128-n32:64-S128".into(),
+        arch: arch.target_arch(),
+        options: TargetOptions {
+            features: "+neon,+fp-armv8,+apple-a7".into(),
+            max_atomic_width: Some(128),
+            forces_embed_bitcode: true,
+            frame_pointer: FramePointer::NonLeaf,
+            // Taken from (and slightly modified) the aarch64-apple-ios-sim spec which says:
+            // Taken from a clang build on Xcode 11.4.1.
+            // These arguments are not actually invoked - they just have
+            // to look right to pass App Store validation.
+            bitcode_llvm_cmdline: "-triple\0\
+                arm64-apple-tvos14.0-simulator\0\
+                -emit-obj\0\
+                -disable-llvm-passes\0\
+                -target-abi\0\
+                darwinpcs\0\
+                -Os\0"
+                .into(),
+            ..base
+        },
+    }
+}

compiler/rustc_target/src/spec/mod.rs

@@ -1399,6 +1399,7 @@ supported_targets! {
     ("aarch64-apple-ios-macabi", aarch64_apple_ios_macabi),
     ("aarch64-apple-ios-sim", aarch64_apple_ios_sim),
     ("aarch64-apple-tvos", aarch64_apple_tvos),
+    ("aarch64-apple-tvos-sim", aarch64_apple_tvos_sim),
     ("x86_64-apple-tvos", x86_64_apple_tvos),
 
     ("armv7k-apple-watchos", armv7k_apple_watchos),