Auto merge of #115140 - wesleywiser:turn_off_mir_sroa, r=cuviper 1.72.0

Disable MIR SROA optimization by default

Turn off the MIR SROA optimization by default to prevent incorrect debuginfo generation and rustc ICEs caused by invalid LLVM IR being created.

Related to #115113

r? `@cuviper`
cc `@saethlin`

1 files changed, 9 insertions, 6 deletions

diff --git a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir
index e546140e0c1..1b4ac793fe9 100644
--- a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir
+++ b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir
@@ -44,20 +44,21 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () {
                         scope 13 (inlined NonNull::<T>::new_unchecked) {
                             debug ptr => _9;
                             let mut _10: *const T;
+                            let mut _24: *mut T;
                             scope 14 {
                                 scope 15 (inlined NonNull::<T>::new_unchecked::runtime::<T>) {
-                                    debug ptr => _9;
+                                    debug ptr => _24;
                                     scope 16 (inlined ptr::mut_ptr::<impl *mut T>::is_null) {
-                                        debug self => _9;
-                                        let mut _24: *mut u8;
+                                        debug self => _24;
+                                        let mut _25: *mut u8;
                                         scope 17 {
                                             scope 18 (inlined ptr::mut_ptr::<impl *mut T>::is_null::runtime_impl) {
-                                                debug ptr => _24;
+                                                debug ptr => _25;
                                                 scope 19 (inlined ptr::mut_ptr::<impl *mut u8>::addr) {
-                                                    debug self => _24;
+                                                    debug self => _25;
                                                     scope 20 {
                                                         scope 21 (inlined ptr::mut_ptr::<impl *mut u8>::cast::<()>) {
-                                                            debug self => _24;
+                                                            debug self => _25;
                                                         }
                                                     }
                                                 }
@@ -133,8 +134,10 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () {
         _9 = _4 as *mut T (PtrToPtr);
         StorageLive(_10);
         StorageLive(_24);
+        StorageLive(_25);
         _10 = _9 as *const T (PointerCoercion(MutToConstPointer));
         _11 = NonNull::<T> { pointer: _10 };
+        StorageDead(_25);
         StorageDead(_24);
         StorageDead(_10);
         StorageDead(_9);