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, 8 insertions, 2 deletions

diff --git a/tests/mir-opt/pre-codegen/mem_replace.mem_replace.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/mem_replace.mem_replace.PreCodegen.after.mir
index dde7a618881..f8f4f5b9959 100644
--- a/tests/mir-opt/pre-codegen/mem_replace.mem_replace.PreCodegen.after.mir
+++ b/tests/mir-opt/pre-codegen/mem_replace.mem_replace.PreCodegen.after.mir
@@ -15,18 +15,20 @@ fn mem_replace(_1: &mut u32, _2: u32) -> u32 {
                 scope 7 (inlined std::ptr::write::<u32>) {
                     debug dst => _4;
                     debug src => _2;
+                    let mut _6: *mut u32;
                     scope 8 {
                         scope 9 (inlined std::ptr::write::runtime::<u32>) {
-                            debug dst => _4;
+                            debug dst => _6;
                         }
                     }
                 }
             }
             scope 4 (inlined std::ptr::read::<u32>) {
                 debug src => _3;
+                let mut _5: *const u32;
                 scope 5 {
                     scope 6 (inlined std::ptr::read::runtime::<u32>) {
-                        debug src => _3;
+                        debug src => _5;
                     }
                 }
             }
@@ -36,11 +38,15 @@ fn mem_replace(_1: &mut u32, _2: u32) -> u32 {
     bb0: {
         StorageLive(_3);
         _3 = &raw const (*_1);
+        StorageLive(_5);
         _0 = (*_3);
+        StorageDead(_5);
         StorageDead(_3);
         StorageLive(_4);
         _4 = &raw mut (*_1);
+        StorageLive(_6);
         (*_4) = _2;
+        StorageDead(_6);
         StorageDead(_4);
         return;
     }