diff options
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/context.rs')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/context.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs index 9f6a2ae3ca1..21473f3b114 100644 --- a/compiler/rustc_codegen_llvm/src/context.rs +++ b/compiler/rustc_codegen_llvm/src/context.rs @@ -1,4 +1,5 @@ use crate::attributes; +use crate::back::write::to_llvm_code_model; use crate::callee::get_fn; use crate::coverageinfo; use crate::debuginfo; @@ -181,6 +182,13 @@ pub unsafe fn create_module( } } + // Linking object files with different code models is undefined behavior + // because the compiler would have to generate additional code (to span + // longer jumps) if a larger code model is used with a smaller one. + // + // See https://reviews.llvm.org/D52322 and https://reviews.llvm.org/D52323. + llvm::LLVMRustSetModuleCodeModel(llmod, to_llvm_code_model(sess.code_model())); + // If skipping the PLT is enabled, we need to add some module metadata // to ensure intrinsic calls don't use it. if !sess.needs_plt() { |