Remove handling for previously dropped LLVM version

Author: beetrees

compiler/rustc_codegen_llvm/src/context.rs

@@ -260,35 +260,29 @@ pub unsafe fn create_module<'ll>(
  }
 
  if let Some(BranchProtection { bti, pac_ret }) = sess.opts.unstable_opts.branch_protection {
- let behavior = if llvm_version >= (15, 0, 0) {
- llvm::LLVMModFlagBehavior::Min
- } else {
- llvm::LLVMModFlagBehavior::Error
- };
-
  if sess.target.arch == "aarch64" {
  llvm::LLVMRustAddModuleFlag(
  llmod,
- behavior,
+ llvm::LLVMModFlagBehavior::Min,
  c"branch-target-enforcement".as_ptr().cast(),
  bti.into(),
  );
  llvm::LLVMRustAddModuleFlag(
  llmod,
- behavior,
+ llvm::LLVMModFlagBehavior::Min,
  c"sign-return-address".as_ptr().cast(),
  pac_ret.is_some().into(),
  );
  let pac_opts = pac_ret.unwrap_or(PacRet { leaf: false, key: PAuthKey::A });
  llvm::LLVMRustAddModuleFlag(
  llmod,
- behavior,
+ llvm::LLVMModFlagBehavior::Min,
  c"sign-return-address-all".as_ptr().cast(),
  pac_opts.leaf.into(),
  );
  llvm::LLVMRustAddModuleFlag(
  llmod,
- behavior,
+ llvm::LLVMModFlagBehavior::Min,
  c"sign-return-address-with-bkey".as_ptr().cast(),
  u32::from(pac_opts.key == PAuthKey::B),
  );