diff options
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/llvm_util.rs')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/llvm_util.rs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs index ace8e0516ed..53571e8cb32 100644 --- a/compiler/rustc_codegen_llvm/src/llvm_util.rs +++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs @@ -415,3 +415,13 @@ pub fn tune_cpu(sess: &Session) -> Option<&str> { let name = sess.opts.debugging_opts.tune_cpu.as_ref()?; Some(handle_native(name)) } + +pub(crate) fn should_use_new_llvm_pass_manager(user_opt: &Option<bool>, target_arch: &str) -> bool { + // The new pass manager is enabled by default for LLVM >= 13. + // This matches Clang, which also enables it since Clang 13. + + // FIXME: There are some perf issues with the new pass manager + // when targeting s390x, so it is temporarily disabled for that + // arch, see https://github.com/rust-lang/rust/issues/89609 + user_opt.unwrap_or_else(|| target_arch != "s390x" && llvm_util::get_version() >= (13, 0, 0)) +} |