1 files changed, 28 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/asm.rs b/compiler/rustc_codegen_llvm/src/asm.rs
index a468d09c2d9..1eb852e6b01 100644
--- a/compiler/rustc_codegen_llvm/src/asm.rs
+++ b/compiler/rustc_codegen_llvm/src/asm.rs
@@ -259,6 +259,7 @@ impl AsmBuilderMethods<'tcx> for Builder<'a, 'll, 'tcx> {
                 InlineAsmArch::RiscV32 | InlineAsmArch::RiscV64 => {}
                 InlineAsmArch::Nvptx64 => {}
                 InlineAsmArch::Hexagon => {}
+                InlineAsmArch::Mips | InlineAsmArch::Mips64 => {}
             }
         }
         if !options.contains(InlineAsmOptions::NOMEM) {
@@ -505,6 +506,8 @@ fn reg_to_llvm(reg: InlineAsmRegOrRegClass, layout: Option<&TyAndLayout<'tcx>>)
             InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg)
             | InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg) => "w",
             InlineAsmRegClass::Hexagon(HexagonInlineAsmRegClass::reg) => "r",
+            InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg) => "r",
+            InlineAsmRegClass::Mips(MipsInlineAsmRegClass::freg) => "f",
             InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg16) => "h",
             InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg32) => "r",
             InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg64) => "l",
@@ -551,6 +554,7 @@ fn modifier_to_llvm(
             }
         }
         InlineAsmRegClass::Hexagon(_) => None,
+        InlineAsmRegClass::Mips(_) => None,
         InlineAsmRegClass::Nvptx(_) => None,
         InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::reg)
         | InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::freg) => None,
@@ -603,6 +607,8 @@ fn dummy_output_type(cx: &CodegenCx<'ll, 'tcx>, reg: InlineAsmRegClass) -> &'ll
             cx.type_vector(cx.type_i64(), 2)
         }
         InlineAsmRegClass::Hexagon(HexagonInlineAsmRegClass::reg) => cx.type_i32(),
+        InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg) => cx.type_i32(),
+        InlineAsmRegClass::Mips(MipsInlineAsmRegClass::freg) => cx.type_f32(),
         InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg16) => cx.type_i16(),
         InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg32) => cx.type_i32(),
         InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg64) => cx.type_i64(),
@@ -700,6 +706,13 @@ fn llvm_fixup_input(
                 value
             }
         }
+        (InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg), Abi::Scalar(s)) => match s.value {
+            // MIPS only supports register-length arithmetics.
+            Primitive::Int(Integer::I8 | Integer::I16, _) => bx.zext(value, bx.cx.type_i32()),
+            Primitive::F32 => bx.bitcast(value, bx.cx.type_i32()),
+            Primitive::F64 => bx.bitcast(value, bx.cx.type_i64()),
+            _ => value,
+        },
         _ => value,
     }
 }
@@ -768,6 +781,14 @@ fn llvm_fixup_output(
                 value
             }
         }
+        (InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg), Abi::Scalar(s)) => match s.value {
+            // MIPS only supports register-length arithmetics.
+            Primitive::Int(Integer::I8, _) => bx.trunc(value, bx.cx.type_i8()),
+            Primitive::Int(Integer::I16, _) => bx.trunc(value, bx.cx.type_i16()),
+            Primitive::F32 => bx.bitcast(value, bx.cx.type_f32()),
+            Primitive::F64 => bx.bitcast(value, bx.cx.type_f64()),
+            _ => value,
+        },
         _ => value,
     }
 }
@@ -831,6 +852,13 @@ fn llvm_fixup_output_type(
                 layout.llvm_type(cx)
             }
         }
+        (InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg), Abi::Scalar(s)) => match s.value {
+            // MIPS only supports register-length arithmetics.
+            Primitive::Int(Integer::I8 | Integer::I16, _) => cx.type_i32(),
+            Primitive::F32 => cx.type_i32(),
+            Primitive::F64 => cx.type_i64(),
+            _ => layout.llvm_type(cx),
+        },
         _ => layout.llvm_type(cx),
     }
 }