miri: Move patterns for simd tests

It isn't clear to me why these error patterns do not trigger,
but I am not going to waste time analyzing bugs in compiletest.

src/tools/miri/tests/fail/intrinsics/simd-float-to-int.rs

@@ -1,9 +1,8 @@
-//@error-pattern: cannot be represented in target type `i32`
 #![feature(portable_simd)]
 use std::simd::*;
 
 fn main() {
     unsafe {
-        let _x: i32x2 = f32x2::from_array([f32::MAX, f32::MIN]).to_int_unchecked();
+        let _x: i32x2 = f32x2::from_array([f32::MAX, f32::MIN]).to_int_unchecked(); //~ERROR: cannot be represented in target type `i32`
     }
 }

src/tools/miri/tests/fail/intrinsics/simd-float-to-int.stderr

@@ -1,18 +1,13 @@
 error: Undefined Behavior: `float_to_int_unchecked` intrinsic called on 3.40282347E+38 which cannot be represented in target type `i32`
-  --> RUSTLIB/core/src/../../portable-simd/crates/core_simd/src/vector.rs:LL:CC
+  --> $DIR/simd-float-to-int.rs:LL:CC
    |
-LL |         unsafe { intrinsics::simd_cast(self) }
-   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^ `float_to_int_unchecked` intrinsic called on 3.40282347E+38 which cannot be represented in target type `i32`
+LL |         let _x: i32x2 = f32x2::from_array([f32::MAX, f32::MIN]).to_int_unchecked();
+   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `float_to_int_unchecked` intrinsic called on 3.40282347E+38 which cannot be represented in target type `i32`
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE:
-   = note: inside `std::simd::Simd::<f32, 2>::to_int_unchecked::<i32>` at RUSTLIB/core/src/../../portable-simd/crates/core_simd/src/vector.rs:LL:CC
-note: inside `main`
-  --> $DIR/simd-float-to-int.rs:LL:CC
-   |
-LL |         let _x: i32x2 = f32x2::from_array([f32::MAX, f32::MIN]).to_int_unchecked();
-   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: inside `main` at $DIR/simd-float-to-int.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

src/tools/miri/tests/fail/intrinsics/simd-gather.rs

@@ -1,11 +1,10 @@
-//@error-pattern: pointer to 1 byte starting at offset 9 is out-of-bounds
 #![feature(portable_simd)]
 use std::simd::*;
 
 fn main() {
     unsafe {
         let vec: &[i8] = &[10, 11, 12, 13, 14, 15, 16, 17, 18];
         let idxs = Simd::from_array([9, 3, 0, 17]);
-        let _result = Simd::gather_select_unchecked(&vec, Mask::splat(true), idxs, Simd::splat(0));
+        let _result = Simd::gather_select_unchecked(&vec, Mask::splat(true), idxs, Simd::splat(0)); //~ERROR: pointer to 1 byte starting at offset 9 is out-of-bounds
     }
 }

src/tools/miri/tests/fail/intrinsics/simd-gather.stderr

@@ -1,18 +1,13 @@
 error: Undefined Behavior: dereferencing pointer failed: ALLOC has size 9, so pointer to 1 byte starting at offset 9 is out-of-bounds
-  --> RUSTLIB/core/src/../../portable-simd/crates/core_simd/src/vector.rs:LL:CC
+  --> $DIR/simd-gather.rs:LL:CC
    |
-LL |         unsafe { intrinsics::simd_gather(or, ptrs, enable.to_int()) }
-   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ dereferencing pointer failed: ALLOC has size 9, so pointer to 1 byte starting at offset 9 is out-of-bounds
+LL |         let _result = Simd::gather_select_unchecked(&vec, Mask::splat(true), idxs, Simd::splat(0));
+   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ dereferencing pointer failed: ALLOC has size 9, so pointer to 1 byte starting at offset 9 is out-of-bounds
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE:
-   = note: inside `std::simd::Simd::<i8, 4>::gather_select_unchecked` at RUSTLIB/core/src/../../portable-simd/crates/core_simd/src/vector.rs:LL:CC
-note: inside `main`
-  --> $DIR/simd-gather.rs:LL:CC
-   |
-LL |         let _result = Simd::gather_select_unchecked(&vec, Mask::splat(true), idxs, Simd::splat(0));
-   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: inside `main` at $DIR/simd-gather.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

src/tools/miri/tests/fail/intrinsics/simd-scatter.rs

@@ -1,12 +1,11 @@
-//@error-pattern: pointer to 1 byte starting at offset 9 is out-of-bounds
 #![feature(portable_simd)]
 use std::simd::*;
 
 fn main() {
     unsafe {
         let mut vec: Vec<i8> = vec![10, 11, 12, 13, 14, 15, 16, 17, 18];
         let idxs = Simd::from_array([9, 3, 0, 17]);
-        Simd::from_array([-27, 82, -41, 124]).scatter_select_unchecked(
+        Simd::from_array([-27, 82, -41, 124]).scatter_select_unchecked( //~ERROR: pointer to 1 byte starting at offset 9 is out-of-bounds
             &mut vec,
             Mask::splat(true),
             idxs,

src/tools/miri/tests/fail/intrinsics/simd-scatter.stderr

@@ -1,22 +1,17 @@
 error: Undefined Behavior: dereferencing pointer failed: ALLOC has size 9, so pointer to 1 byte starting at offset 9 is out-of-bounds
-  --> RUSTLIB/core/src/../../portable-simd/crates/core_simd/src/vector.rs:LL:CC
-   |
-LL |             intrinsics::simd_scatter(self, ptrs, enable.to_int())
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ dereferencing pointer failed: ALLOC has size 9, so pointer to 1 byte starting at offset 9 is out-of-bounds
-   |
-   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
-   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
-   = note: BACKTRACE:
-   = note: inside `std::simd::Simd::<i8, 4>::scatter_select_unchecked` at RUSTLIB/core/src/../../portable-simd/crates/core_simd/src/vector.rs:LL:CC
-note: inside `main`
   --> $DIR/simd-scatter.rs:LL:CC
    |
 LL | /         Simd::from_array([-27, 82, -41, 124]).scatter_select_unchecked(
 LL | |             &mut vec,
 LL | |             Mask::splat(true),
 LL | |             idxs,
 LL | |         );
-   | |_________^
+   | |_________^ dereferencing pointer failed: ALLOC has size 9, so pointer to 1 byte starting at offset 9 is out-of-bounds
+   |
+   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
+   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
+   = note: BACKTRACE:
+   = note: inside `main` at $DIR/simd-scatter.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace