Author: Timm Baeder
Date: 2025-11-26T06:34:07+01:00
New Revision: a57fe84af0679871d914e0d5fc3f449069f22a19

URL: 
https://github.com/llvm/llvm-project/commit/a57fe84af0679871d914e0d5fc3f449069f22a19
DIFF: 
https://github.com/llvm/llvm-project/commit/a57fe84af0679871d914e0d5fc3f449069f22a19.diff

LOG: [clang] Implement dump() for AddrLabelDiff APValues (#169505)

Added: 
    clang/test/AST/ast-dump-APValue-addrlabeldiff.c

Modified: 
    clang/lib/AST/TextNodeDumper.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/AST/TextNodeDumper.cpp 
b/clang/lib/AST/TextNodeDumper.cpp
index 41aebdb8d2f1b..7bc0404db1bee 100644
--- a/clang/lib/AST/TextNodeDumper.cpp
+++ b/clang/lib/AST/TextNodeDumper.cpp
@@ -850,7 +850,10 @@ void TextNodeDumper::Visit(const APValue &Value, QualType 
Ty) {
     return;
   }
   case APValue::AddrLabelDiff:
-    OS << "AddrLabelDiff <todo>";
+    OS << "AddrLabelDiff ";
+    OS << "&&" << Value.getAddrLabelDiffLHS()->getLabel()->getName();
+    OS << " - ";
+    OS << "&&" << Value.getAddrLabelDiffRHS()->getLabel()->getName();
     return;
   }
   llvm_unreachable("Unknown APValue kind!");

diff  --git a/clang/test/AST/ast-dump-APValue-addrlabel
diff .c b/clang/test/AST/ast-dump-APValue-addrlabel
diff .c
new file mode 100644
index 0000000000000..481098eabedb9
--- /dev/null
+++ b/clang/test/AST/ast-dump-APValue-addrlabel
diff .c
@@ -0,0 +1,22 @@
+// Test without serialization:
+// RUN: %clang_cc1 -std=c23 -ast-dump %s -ast-dump-filter Test \
+// RUN: | FileCheck --strict-whitespace --match-full-lines %s
+//
+// Test with serialization:
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -Wno-unused-value -std=c23 
-emit-pch -o %t %s
+// RUN: %clang_cc1 -x c -triple x86_64-unknown-unknown -Wno-unused-value 
-std=c23 \
+// RUN:           -include-pch %t -ast-dump-all -ast-dump-filter Test 
/dev/null \
+// RUN: | sed -e "s/ <undeserialized declarations>//" -e "s/ imported//" \
+// RUN: | FileCheck --strict-whitespace --match-full-lines %s
+
+
+// CHECK:  |   |-value: AddrLabelDiff &&l2 - &&l1
+int Test(void) {
+  constexpr char ar = &&l2 - &&l1;
+l1:
+  return 10;
+l2:
+  return 11;
+}
+
+


        
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