Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/compiler/rustc_target/src/spec/thumbv7a_pc_windows_msvc.rs b/compiler/rustc_target/src/spec/thumbv7a_pc_windows_msvc.rs
new file mode 100644
index 000000000..4d09d3a4d
--- /dev/null
+++ b/compiler/rustc_target/src/spec/thumbv7a_pc_windows_msvc.rs
@@ -0,0 +1,28 @@
+use crate::spec::{LinkerFlavor, PanicStrategy, Target, TargetOptions};
+
+pub fn target() -> Target {
+    let mut base = super::windows_msvc_base::opts();
+    // Prevent error LNK2013: BRANCH24(T) fixup overflow
+    // The LBR optimization tries to eliminate branch islands,
+    // but if the displacement is larger than can fit
+    // in the instruction, this error will occur. The linker
+    // should be smart enough to insert branch islands only
+    // where necessary, but this is not the observed behavior.
+    // Disabling the LBR optimization works around the issue.
+    base.add_pre_link_args(LinkerFlavor::Msvc, &["/OPT:NOLBR"]);
+
+    Target {
+        llvm_target: "thumbv7a-pc-windows-msvc".into(),
+        pointer_width: 32,
+        data_layout: "e-m:w-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
+        arch: "arm".into(),
+        options: TargetOptions {
+            features: "+vfp3,+neon".into(),
+            max_atomic_width: Some(64),
+            // FIXME(jordanrh): use PanicStrategy::Unwind when SEH is
+            // implemented for windows/arm in LLVM
+            panic_strategy: PanicStrategy::Abort,
+            ..base
+        },
+    }
+}