Extend #69020 test to include reversed order.

Make sure we check the case where the generic operand comes first, in
case any future changes make this ordering matter.

Author: jumbatm

src/test/ui/consts/issue-69020.rs

@@ -9,9 +9,16 @@ use std::i32;
 
 pub trait Foo {
     const NEG: i32;
+    const GEN: i32;
+
     const ADD: i32;
+    const DDA: i32;
+
     const DIV: i32;
+    const VID: i32;
+
     const OOB: i32;
+    const BOO: i32;
 }
 
 // These constants cannot be evaluated already (they depend on `T::N`), so
@@ -20,10 +27,21 @@ pub trait Foo {
 impl<T: Foo> Foo for Vec<T> {
     const NEG: i32 = -i32::MIN + T::NEG;
     //~^ ERROR arithmetic operation will overflow
+    const GEN: i32 = T::NEG + (-i32::MIN);
+    //~^ ERROR arithmetic operation will overflow
+
     const ADD: i32 = (i32::MAX+1) + T::ADD;
     //~^ ERROR arithmetic operation will overflow
+    const DDA: i32 =  T::ADD + (i32::MAX+1);
+    //~^ ERROR arithmetic operation will overflow
+
     const DIV: i32 = (1/0) + T::DIV;
     //~^ ERROR operation will panic
+    const VID: i32 = T::DIV + (1/0);
+    //~^ ERROR operation will panic
+
     const OOB: i32 = [1][1] + T::OOB;
     //~^ ERROR operation will panic
+    const BOO: i32 = T::OOB + [1][1];
+    //~^ ERROR operation will panic
 }