machinst x64: fix sign-extension at boundary

4 years ago · f932bccaf8
1 changed files with 2 additions and 2 deletions
--- a/cranelift/codegen/src/isa/x64/abi.rs
+++ b/cranelift/codegen/src/isa/x64/abi.rs
@ -295,14 +295,14 @@ impl ABIBody for X64ABIBody {
                    (ArgumentExtension::Uext, Some(ext_mode)) => {
                        ret.push(Inst::movzx_rm_r(
                            ext_mode,
-                            RegMem::reg(r.to_reg()),
+                            RegMem::reg(from_reg.to_reg()),
                            dest_reg,
                        ));
                    }
                    (ArgumentExtension::Sext, Some(ext_mode)) => {
                        ret.push(Inst::movsx_rm_r(
                            ext_mode,
-                            RegMem::reg(r.to_reg()),
+                            RegMem::reg(from_reg.to_reg()),
                            dest_reg,
                        ));
                    }