[gcc r15-8666] d: Indexing a cast(AA) yields no lvalue anymore

[Iain Buclaw via Gcc-cvs]

https://gcc.gnu.org/g:76df0e069f6c8ba5aa93ae10606ba61fa990883c

commit r15-8666-g76df0e069f6c8ba5aa93ae10606ba61fa990883c
Author: Iain Buclaw <ibuc...@gdcproject.org>
Date:   Sat Mar 22 10:33:24 2025 +0100

    d: Indexing a cast(AA) yields no lvalue anymore
    
    gcc/d/ChangeLog:
    
            * dmd/MERGE: Merge upstream dmd 8db14cf846.
    
    Reviewed-on: https://github.com/dlang/dmd/pull/21029

Diff:
---
 gcc/d/dmd/MERGE                             |  2 +-
 gcc/d/dmd/expression.d                      |  1 +
 gcc/testsuite/gdc.test/runnable/test21020.d | 11 +++++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/gcc/d/dmd/MERGE b/gcc/d/dmd/MERGE
index 1be4da416f45..f274580f2d60 100644
--- a/gcc/d/dmd/MERGE
+++ b/gcc/d/dmd/MERGE
@@ -1,4 +1,4 @@
-fde0f8c40a1b8eb78c3485cb0e940035bfe6fb00
+8db14cf8467ca25256904d51169b176c9c89afb1
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.
diff --git a/gcc/d/dmd/expression.d b/gcc/d/dmd/expression.d
index ef5c0b09eb45..4bf1f9f25f86 100644
--- a/gcc/d/dmd/expression.d
+++ b/gcc/d/dmd/expression.d
@@ -3632,6 +3632,7 @@ extern (C++) final class CastExp : UnaExp
         if (rvalue || !e1.isLvalue())
             return false;
         return (to.ty == Tsarray && (e1.type.ty == Tvector || e1.type.ty == 
Tsarray)) ||
+            (to.ty == Taarray && e1.type.ty == Taarray) ||
             e1.type.mutableOf.unSharedOf().equals(to.mutableOf().unSharedOf());
     }
 
diff --git a/gcc/testsuite/gdc.test/runnable/test21020.d 
b/gcc/testsuite/gdc.test/runnable/test21020.d
new file mode 100644
index 000000000000..484db30a56cd
--- /dev/null
+++ b/gcc/testsuite/gdc.test/runnable/test21020.d
@@ -0,0 +1,11 @@
+// https://github.com/dlang/dmd/issues/21020
+
+shared struct Queue {
+    int[int] map;
+}
+
+void main() {
+    auto queue = Queue();
+    (cast(int[int]) queue.map)[1] = 2;
+    assert(queue.map[1] == 2);
+}