Integrate LLVM at llvm/llvm-project@a7c97252ed18

Updates LLVM usage to match
[a7c97252ed18](llvm/llvm-project@a7c97252ed18)

PiperOrigin-RevId: 908977374

Author: HEIR Team

bazel/extensions.bzl

@@ -6,7 +6,7 @@ load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 
 def _llvm_deps_impl(_):
     """Implementation of the llvm_deps module extension."""
-    LLVM_COMMIT = "4d676e56f0ee819a20a021434a53060a43c33120"
+    LLVM_COMMIT = "a7c97252ed18839e87796dffd3926086ab62e8fd"
 
     # Download LLVM/MLIR using a git repository
     new_git_repository(

patches/llvm.patch

@@ -1 +1,13 @@
 Auto generated patch. Do not edit or delete it, even if empty.
+diff -ruN --strip-trailing-cr a/compiler-rt/test/cfi/icall/bad-signature.c b/compiler-rt/test/cfi/icall/bad-signature.c
+--- a/compiler-rt/test/cfi/icall/bad-signature.c
++++ b/compiler-rt/test/cfi/icall/bad-signature.c
+@@ -17,7 +17,7 @@
+   fprintf(stderr, "1\n");
+ 
+   // CFI-DIAG: runtime error: control flow integrity check for type 'void (int)' failed during indirect function call
+-  // CFI-DIAG: bad-signature.c:[[@LINE-8]]: note: f defined here
++  // CFI-DIAG: bad-signature.c:[[@LINE-8]]{{(:[0-9]+)?}}: note: f defined here
+   ((void (*)(int))f)(42); // UB here
+ 
+   // CFI-NOT: 2