Add addcarry/subborrow intrinsics to platform_intrinsics

All of these LLVM intrinsics return aggregates, so they need to be
compiler defined!

Author: alexcrichton

src/librustc_platform_intrinsics/nvptx.rs

@@ -44,5 +44,25 @@ pub fn find(name: &str) -> Option<Intrinsic> {
             output: &Type::Aggregate(false, &[&::U64, &::I32]),
             definition: Named("llvm.x86.rdseed.64")
         },
+        "_addcarry_u32" => Intrinsic {
+            inputs: &[&::I8, &::I32, &::I32],
+            output: &Type::Aggregate(false, &[&::I8, &::I32]),
+            definition: Named("llvm.x86.addcarry.32"),
+        },
+        "_addcarry_u64" => Intrinsic {
+            inputs: &[&::I8, &::I64, &::I64],
+            output: &Type::Aggregate(false, &[&::I8, &::I64]),
+            definition: Named("llvm.x86.addcarry.64"),
+        },
+        "_subborrow_u32" => Intrinsic {
+            inputs: &[&::I8, &::I32, &::I32],
+            output: &Type::Aggregate(false, &[&::I8, &::I32]),
+            definition: Named("llvm.x86.subborrow.32"),
+        },
+        "_subborrow_u64" => Intrinsic {
+            inputs: &[&::I8, &::I64, &::I64],
+            output: &Type::Aggregate(false, &[&::I8, &::I64]),
+            definition: Named("llvm.x86.subborrow.64"),
+        },
     }
 }

src/librustc_platform_intrinsics/x86.rs

@@ -3379,180 +3379,6 @@ extern "platform-intrinsic" {
 ```
 "##,
 
-E0440: r##"
-A platform-specific intrinsic function has the wrong number of type
-parameters. Erroneous code example:
-
-```compile_fail,E0440
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct f64x2(f64, f64);
-
-extern "platform-intrinsic" {
-    fn x86_mm_movemask_pd<T>(x: f64x2) -> i32;
-    // error: platform-specific intrinsic has wrong number of type
-    //        parameters
-}
-```
-
-Please refer to the function declaration to see if it corresponds
-with yours. Example:
-
-```
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct f64x2(f64, f64);
-
-extern "platform-intrinsic" {
-    fn x86_mm_movemask_pd(x: f64x2) -> i32;
-}
-```
-"##,
-
-E0441: r##"
-An unknown platform-specific intrinsic function was used. Erroneous
-code example:
-
-```compile_fail,E0441
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct i16x8(i16, i16, i16, i16, i16, i16, i16, i16);
-
-extern "platform-intrinsic" {
-    fn x86_mm_adds_ep16(x: i16x8, y: i16x8) -> i16x8;
-    // error: unrecognized platform-specific intrinsic function
-}
-```
-
-Please verify that the function name wasn't misspelled, and ensure
-that it is declared in the rust source code (in the file
-src/librustc_platform_intrinsics/x86.rs). Example:
-
-```
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct i16x8(i16, i16, i16, i16, i16, i16, i16, i16);
-
-extern "platform-intrinsic" {
-    fn x86_mm_adds_epi16(x: i16x8, y: i16x8) -> i16x8; // ok!
-}
-```
-"##,
-
-E0442: r##"
-Intrinsic argument(s) and/or return value have the wrong type.
-Erroneous code example:
-
-```compile_fail,E0442
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct i8x16(i8, i8, i8, i8, i8, i8, i8, i8,
-             i8, i8, i8, i8, i8, i8, i8, i8);
-#[repr(simd)]
-struct i32x4(i32, i32, i32, i32);
-#[repr(simd)]
-struct i64x2(i64, i64);
-
-extern "platform-intrinsic" {
-    fn x86_mm_adds_epi16(x: i8x16, y: i32x4) -> i64x2;
-    // error: intrinsic arguments/return value have wrong type
-}
-```
-
-To fix this error, please refer to the function declaration to give
-it the awaited types. Example:
-
-```
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct i16x8(i16, i16, i16, i16, i16, i16, i16, i16);
-
-extern "platform-intrinsic" {
-    fn x86_mm_adds_epi16(x: i16x8, y: i16x8) -> i16x8; // ok!
-}
-```
-"##,
-
-E0443: r##"
-Intrinsic argument(s) and/or return value have the wrong type.
-Erroneous code example:
-
-```compile_fail,E0443
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct i16x8(i16, i16, i16, i16, i16, i16, i16, i16);
-#[repr(simd)]
-struct i64x8(i64, i64, i64, i64, i64, i64, i64, i64);
-
-extern "platform-intrinsic" {
-    fn x86_mm_adds_epi16(x: i16x8, y: i16x8) -> i64x8;
-    // error: intrinsic argument/return value has wrong type
-}
-```
-
-To fix this error, please refer to the function declaration to give
-it the awaited types. Example:
-
-```
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct i16x8(i16, i16, i16, i16, i16, i16, i16, i16);
-
-extern "platform-intrinsic" {
-    fn x86_mm_adds_epi16(x: i16x8, y: i16x8) -> i16x8; // ok!
-}
-```
-"##,
-
-E0444: r##"
-A platform-specific intrinsic function has wrong number of arguments.
-Erroneous code example:
-
-```compile_fail,E0444
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct f64x2(f64, f64);
-
-extern "platform-intrinsic" {
-    fn x86_mm_movemask_pd(x: f64x2, y: f64x2, z: f64x2) -> i32;
-    // error: platform-specific intrinsic has invalid number of arguments
-}
-```
-
-Please refer to the function declaration to see if it corresponds
-with yours. Example:
-
-```
-#![feature(repr_simd)]
-#![feature(platform_intrinsics)]
-
-#[repr(simd)]
-struct f64x2(f64, f64);
-
-extern "platform-intrinsic" {
-    fn x86_mm_movemask_pd(x: f64x2) -> i32; // ok!
-}
-```
-"##,
-
 E0516: r##"
 The `typeof` keyword is currently reserved but unimplemented.
 Erroneous code example:
@@ -4891,6 +4717,11 @@ register_diagnostics! {
 //  E0372, // coherence not object safe
     E0377, // the trait `CoerceUnsized` may only be implemented for a coercion
            // between structures with the same definition
+    E0440, // errors associated with unstable platform intrinsics
+    E0441, // errors associated with unstable platform intrinsics
+    E0442, // errors associated with unstable platform intrinsics
+    E0443, // errors associated with unstable platform intrinsics
+    E0444, // errors associated with unstable platform intrinsics
     E0533, // `{}` does not name a unit variant, unit struct or a constant
 //  E0563, // cannot determine a type for this `impl Trait`: {} // removed in 6383de15
     E0564, // only named lifetimes are allowed in `impl Trait`,

src/librustc_typeck/diagnostics.rs

@@ -15,7 +15,7 @@
 struct f64x2(f64, f64);
 
 extern "platform-intrinsic" {
-    fn x86_mm_movemask_pd<T>(x: f64x2) -> i32; //~ ERROR E0440
+    fn x86_rdrand16_step<T>(x: f64x2) -> i32; //~ ERROR E0440
 }
 
 fn main () {

src/test/run-pass/simd/simd-upgraded.rs

@@ -1,8 +1,8 @@
 error[E0440]: platform-specific intrinsic has wrong number of type parameters: found 1, expected 0
   --> $DIR/E0440.rs:18:5
    |
-LL |     fn x86_mm_movemask_pd<T>(x: f64x2) -> i32; //~ ERROR E0440
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |     fn x86_rdrand16_step<T>(x: f64x2) -> i32; //~ ERROR E0440
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 

src/test/ui/error-codes/E0440.rs

@@ -14,16 +14,10 @@
 #[repr(simd)]
 struct i8x16(i8, i8, i8, i8, i8, i8, i8, i8,
              i8, i8, i8, i8, i8, i8, i8, i8);
-#[repr(simd)]
-struct i32x4(i32, i32, i32, i32);
-#[repr(simd)]
-struct i64x2(i64, i64);
 
 extern "platform-intrinsic" {
-    fn x86_mm_adds_epi16(x: i8x16, y: i32x4) -> i64x2;
+    fn aarch64_vld2_s8(x: *const i8) -> (i8x16, i8x16);
     //~^ ERROR E0442
-    //~| ERROR E0442
-    //~| ERROR E0442
 }
 
 fn main() {}

src/test/ui/error-codes/E0440.stderr

@@ -1,21 +1,9 @@
-error[E0442]: intrinsic argument 1 has wrong type: found vector with length 16, expected length 8
-  --> $DIR/E0442.rs:23:5
+error[E0442]: intrinsic return value has wrong type: found vector with length 16, expected length 8
+  --> $DIR/E0442.rs:19:5
    |
-LL |     fn x86_mm_adds_epi16(x: i8x16, y: i32x4) -> i64x2;
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |     fn aarch64_vld2_s8(x: *const i8) -> (i8x16, i8x16);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0442]: intrinsic argument 2 has wrong type: found vector with length 4, expected length 8
-  --> $DIR/E0442.rs:23:5
-   |
-LL |     fn x86_mm_adds_epi16(x: i8x16, y: i32x4) -> i64x2;
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error[E0442]: intrinsic return value has wrong type: found vector with length 2, expected length 8
-  --> $DIR/E0442.rs:23:5
-   |
-LL |     fn x86_mm_adds_epi16(x: i8x16, y: i32x4) -> i64x2;
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 3 previous errors
+error: aborting due to previous error
 
 For more information about this error, try `rustc --explain E0442`.

src/test/ui/error-codes/E0442.rs

@@ -12,12 +12,13 @@
 #![feature(platform_intrinsics)]
 
 #[repr(simd)]
-struct i16x8(i16, i16, i16, i16, i16, i16, i16, i16);
+struct i8x8(i8, i8, i8, i8, i8, i8, i8, i8);
 #[repr(simd)]
 struct i64x8(i64, i64, i64, i64, i64, i64, i64, i64);
 
 extern "platform-intrinsic" {
-    fn x86_mm_adds_epi16(x: i16x8, y: i16x8) -> i64x8; //~ ERROR E0443
+    fn aarch64_vld2_s8(x: *const i8) -> (i8x8, i64x8);
+    //~^ ERROR E0443
 }
 
 fn main() {}

src/test/ui/error-codes/E0442.stderr

@@ -1,7 +1,7 @@
-error[E0443]: intrinsic return value has wrong type: found `i64x8`, expected `i16x8` which was used for this vector type previously in this signature
+error[E0443]: intrinsic return value has wrong type: found `i64x8`, expected `i8x8` which was used for this vector type previously in this signature
   --> $DIR/E0443.rs:20:5
    |
-LL |     fn x86_mm_adds_epi16(x: i16x8, y: i16x8) -> i64x8; //~ ERROR E0443
+LL |     fn aarch64_vld2_s8(x: *const i8) -> (i8x8, i64x8);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error