Rollup merge of #126502 - cuviper:dump-mir-exclude-alloc-bytes, r=estebank

Ignore allocation bytes in some mir-opt tests

This adds `rustc -Zdump-mir-exclude-alloc-bytes` to skip writing allocation bytes in MIR dumps, and applies it to tests that were failing on s390x due to its big-endian byte order.

Fixes #126261

1 files changed, 3 insertions, 0 deletions

diff --git a/compiler/rustc_middle/src/mir/pretty.rs b/compiler/rustc_middle/src/mir/pretty.rs
index 82625ae3d47..223249952dc 100644
--- a/compiler/rustc_middle/src/mir/pretty.rs
+++ b/compiler/rustc_middle/src/mir/pretty.rs
@@ -1545,6 +1545,9 @@ impl<'a, 'tcx, Prov: Provenance, Extra, Bytes: AllocBytes> std::fmt::Display
             // We are done.
             return write!(w, " {{}}");
         }
+        if tcx.sess.opts.unstable_opts.dump_mir_exclude_alloc_bytes {
+            return write!(w, " {{ .. }}");
+        }
         // Write allocation bytes.
         writeln!(w, " {{")?;
         write_allocation_bytes(tcx, alloc, w, "    ")?;