From b611b6bbb81c67579429c41dc99f112a807b0a38 Mon Sep 17 00:00:00 2001
From: Scott McMurray <scottmcm@users.noreply.github.com>
Date: Sun, 16 Jun 2024 01:22:58 -0700
Subject: Replace `NormalizeArrayLen` with `GVN`

GVN is actually on in release, and covers all the same things (or more), with `LowerSliceLen` changed to produce `PtrMetadata`.
---
 ...er_array_len.array_len_raw.GVN.panic-abort.diff | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 tests/mir-opt/lower_array_len.array_len_raw.GVN.panic-abort.diff

(limited to 'tests/mir-opt/lower_array_len.array_len_raw.GVN.panic-abort.diff')

diff --git a/tests/mir-opt/lower_array_len.array_len_raw.GVN.panic-abort.diff b/tests/mir-opt/lower_array_len.array_len_raw.GVN.panic-abort.diff
new file mode 100644
index 00000000000..b5e8b66813a
--- /dev/null
+++ b/tests/mir-opt/lower_array_len.array_len_raw.GVN.panic-abort.diff
@@ -0,0 +1,50 @@
+- // MIR for `array_len_raw` before GVN
++ // MIR for `array_len_raw` after GVN
+  
+  fn array_len_raw(_1: [u8; N]) -> usize {
+      debug arr => _1;
+      let mut _0: usize;
+      let _2: &[u8];
+      let mut _3: &[u8; N];
+      let _4: &[u8; N];
+      let mut _6: &[u8];
+      let _7: &[u8];
+      scope 1 {
+          debug arr => _2;
+          let _5: *const [u8];
+          scope 2 {
+              debug arr => _5;
+          }
+      }
+  
+      bb0: {
+-         StorageLive(_2);
++         nop;
+          StorageLive(_3);
+          StorageLive(_4);
+          _4 = &_1;
+          _3 = &(*_4);
+          _2 = move _3 as &[u8] (PointerCoercion(Unsize));
+          StorageDead(_3);
+          StorageDead(_4);
+          StorageLive(_5);
+          _5 = &raw const (*_2);
+          StorageLive(_6);
+          StorageLive(_7);
+          _7 = &(*_5);
+          _6 = &(*_7);
+-         _0 = PtrMetadata(move _6);
++         _0 = const N;
+          goto -> bb1;
+      }
+  
+      bb1: {
+          StorageDead(_6);
+          StorageDead(_5);
+-         StorageDead(_2);
++         nop;
+          StorageDead(_7);
+          return;
+      }
+  }
+  
-- 
cgit 1.4.1-3-g733a5