Reorder `ConstMethods`.

It's crazy to have the integer methods in something close to random
order.

The reordering makes the gaps clear: `const_i64`, `const_i128`,
`const_isize`, and `const_u16`. I guess they just aren't needed.

compiler/rustc_codegen_gcc/src/common.rs

@@ -80,22 +80,14 @@ impl<'gcc, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
         self.const_undef(typ)
     }
 
-    fn const_int(&self, typ: Type<'gcc>, int: i64) -> RValue<'gcc> {
-        self.gcc_int(typ, int)
-    }
-
-    fn const_uint(&self, typ: Type<'gcc>, int: u64) -> RValue<'gcc> {
-        self.gcc_uint(typ, int)
-    }
-
-    fn const_uint_big(&self, typ: Type<'gcc>, num: u128) -> RValue<'gcc> {
-        self.gcc_uint_big(typ, num)
-    }
-
     fn const_bool(&self, val: bool) -> RValue<'gcc> {
         self.const_uint(self.type_i1(), val as u64)
     }
 
+    fn const_i8(&self, i: i8) -> RValue<'gcc> {
+        self.const_int(self.type_i8(), i as i64)
+    }
+
     fn const_i16(&self, i: i16) -> RValue<'gcc> {
         self.const_int(self.type_i16(), i as i64)
     }
@@ -104,8 +96,12 @@ impl<'gcc, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
         self.const_int(self.type_i32(), i as i64)
     }
 
-    fn const_i8(&self, i: i8) -> RValue<'gcc> {
-        self.const_int(self.type_i8(), i as i64)
+    fn const_int(&self, typ: Type<'gcc>, int: i64) -> RValue<'gcc> {
+        self.gcc_int(typ, int)
+    }
+
+    fn const_u8(&self, i: u8) -> RValue<'gcc> {
+        self.const_uint(self.type_u8(), i as u64)
     }
 
     fn const_u32(&self, i: u32) -> RValue<'gcc> {
@@ -130,8 +126,12 @@ impl<'gcc, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
         self.const_uint(self.usize_type, i)
     }
 
-    fn const_u8(&self, i: u8) -> RValue<'gcc> {
-        self.const_uint(self.type_u8(), i as u64)
+    fn const_uint(&self, typ: Type<'gcc>, int: u64) -> RValue<'gcc> {
+        self.gcc_uint(typ, int)
+    }
+
+    fn const_uint_big(&self, typ: Type<'gcc>, num: u128) -> RValue<'gcc> {
+        self.gcc_uint_big(typ, num)
     }
 
     fn const_real(&self, typ: Type<'gcc>, val: f64) -> RValue<'gcc> {

compiler/rustc_codegen_llvm/src/common.rs

@@ -126,25 +126,14 @@ impl<'ll, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
         unsafe { llvm::LLVMGetPoison(t) }
     }
 
-    fn const_int(&self, t: &'ll Type, i: i64) -> &'ll Value {
-        unsafe { llvm::LLVMConstInt(t, i as u64, True) }
-    }
-
-    fn const_uint(&self, t: &'ll Type, i: u64) -> &'ll Value {
-        unsafe { llvm::LLVMConstInt(t, i, False) }
-    }
-
-    fn const_uint_big(&self, t: &'ll Type, u: u128) -> &'ll Value {
-        unsafe {
-            let words = [u as u64, (u >> 64) as u64];
-            llvm::LLVMConstIntOfArbitraryPrecision(t, 2, words.as_ptr())
-        }
-    }
-
     fn const_bool(&self, val: bool) -> &'ll Value {
         self.const_uint(self.type_i1(), val as u64)
     }
 
+    fn const_i8(&self, i: i8) -> &'ll Value {
+        self.const_int(self.type_i8(), i as i64)
+    }
+
     fn const_i16(&self, i: i16) -> &'ll Value {
         self.const_int(self.type_i16(), i as i64)
     }
@@ -153,8 +142,12 @@ impl<'ll, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
         self.const_int(self.type_i32(), i as i64)
     }
 
-    fn const_i8(&self, i: i8) -> &'ll Value {
-        self.const_int(self.type_i8(), i as i64)
+    fn const_int(&self, t: &'ll Type, i: i64) -> &'ll Value {
+        unsafe { llvm::LLVMConstInt(t, i as u64, True) }
+    }
+
+    fn const_u8(&self, i: u8) -> &'ll Value {
+        self.const_uint(self.type_i8(), i as u64)
     }
 
     fn const_u32(&self, i: u32) -> &'ll Value {
@@ -179,8 +172,15 @@ impl<'ll, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
         self.const_uint(self.isize_ty, i)
     }
 
-    fn const_u8(&self, i: u8) -> &'ll Value {
-        self.const_uint(self.type_i8(), i as u64)
+    fn const_uint(&self, t: &'ll Type, i: u64) -> &'ll Value {
+        unsafe { llvm::LLVMConstInt(t, i, False) }
+    }
+
+    fn const_uint_big(&self, t: &'ll Type, u: u128) -> &'ll Value {
+        unsafe {
+            let words = [u as u64, (u >> 64) as u64];
+            llvm::LLVMConstIntOfArbitraryPrecision(t, 2, words.as_ptr())
+        }
     }
 
     fn const_real(&self, t: &'ll Type, val: f64) -> &'ll Value {

compiler/rustc_codegen_ssa/src/traits/consts.rs

@@ -14,18 +14,20 @@ pub trait ConstCodegenMethods<'tcx>: BackendTypes {
     /// (including code that e.g. copies uninit memory with `MaybeUninit`) can never encounter a
     /// poison value.
     fn const_poison(&self, t: Self::Type) -> Self::Value;
-    fn const_int(&self, t: Self::Type, i: i64) -> Self::Value;
-    fn const_uint(&self, t: Self::Type, i: u64) -> Self::Value;
-    fn const_uint_big(&self, t: Self::Type, u: u128) -> Self::Value;
+
     fn const_bool(&self, val: bool) -> Self::Value;
+
+    fn const_i8(&self, i: i8) -> Self::Value;
     fn const_i16(&self, i: i16) -> Self::Value;
     fn const_i32(&self, i: i32) -> Self::Value;
-    fn const_i8(&self, i: i8) -> Self::Value;
+    fn const_int(&self, t: Self::Type, i: i64) -> Self::Value;
+    fn const_u8(&self, i: u8) -> Self::Value;
     fn const_u32(&self, i: u32) -> Self::Value;
     fn const_u64(&self, i: u64) -> Self::Value;
     fn const_u128(&self, i: u128) -> Self::Value;
     fn const_usize(&self, i: u64) -> Self::Value;
-    fn const_u8(&self, i: u8) -> Self::Value;
+    fn const_uint(&self, t: Self::Type, i: u64) -> Self::Value;
+    fn const_uint_big(&self, t: Self::Type, u: u128) -> Self::Value;
     fn const_real(&self, t: Self::Type, val: f64) -> Self::Value;
 
     fn const_str(&self, s: &str) -> (Self::Value, Self::Value);