diff --git a/src/asm.rs b/src/asm.rs
index b44d4aa8cc82..6b067b35e712 100644
--- a/src/asm.rs
+++ b/src/asm.rs
@@ -688,6 +688,8 @@ fn reg_to_gcc(reg: InlineAsmRegOrRegClass) -> ConstraintOrRegister {
             ) => {
                 unreachable!("clobber-only")
             }
+            InlineAsmRegClass::Sparc(SparcInlineAsmRegClass::reg) => "r",
+            InlineAsmRegClass::Sparc(SparcInlineAsmRegClass::yreg) => unreachable!("clobber-only"),
             InlineAsmRegClass::Err => unreachable!(),
         },
     };
@@ -767,6 +769,8 @@ fn dummy_output_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, reg: InlineAsmRegCl
         InlineAsmRegClass::S390x(S390xInlineAsmRegClass::vreg | S390xInlineAsmRegClass::areg) => {
             unreachable!("clobber-only")
         }
+        InlineAsmRegClass::Sparc(SparcInlineAsmRegClass::reg) => cx.type_i32(),
+        InlineAsmRegClass::Sparc(SparcInlineAsmRegClass::yreg) => unreachable!("clobber-only"),
         InlineAsmRegClass::Msp430(Msp430InlineAsmRegClass::reg) => cx.type_i16(),
         InlineAsmRegClass::M68k(M68kInlineAsmRegClass::reg) => cx.type_i32(),
         InlineAsmRegClass::M68k(M68kInlineAsmRegClass::reg_addr) => cx.type_i32(),
@@ -946,6 +950,7 @@ fn modifier_to_gcc(
         },
         InlineAsmRegClass::Avr(_) => None,
         InlineAsmRegClass::S390x(_) => None,
+        InlineAsmRegClass::Sparc(_) => None,
         InlineAsmRegClass::Msp430(_) => None,
         InlineAsmRegClass::M68k(_) => None,
         InlineAsmRegClass::CSKY(_) => None,