1 files changed, 36 insertions, 0 deletions

diff --git a/gitlab/issues/target_missing/host_s390/accel_missing/1934.toml b/gitlab/issues/target_missing/host_s390/accel_missing/1934.toml
new file mode 100644
index 00000000..9987d576
--- /dev/null
+++ b/gitlab/issues/target_missing/host_s390/accel_missing/1934.toml
@@ -0,0 +1,36 @@
+id = 1934
+title = "Build failure on s390x with Clang 17 due to int128 alignment used in `__sync_` operations"
+state = "closed"
+created_at = "2023-10-13T07:22:59.508Z"
+closed_at = "2023-11-13T09:39:18.550Z"
+labels = ["Build System", "host: s390", "workflow::Patch available"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1934"
+host-os = "n/a"
+host-arch = "n/a"
+qemu-version = "n/a"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """We experienced this downstream, but filing this here since the code still seems to be the same in git.
+
+https://reviews.llvm.org/D143813 introduced this warning since, according to the description, `__int128`
+needs to be 8-byte aligned on s390 but the code in `host/include/generic/host/atomic128-ldst.h` unconditionally uses 16-byte alignment.
+
+The output is:
+
+```
+In file included from ../accel/tcg/cputlb.c:32:
+In file included from /builddir/build/BUILD/qemu-8.1.0/include/exec/helper-proto-common.h:10:
+In file included from /builddir/build/BUILD/qemu-8.1.0/include/qemu/atomic128.h:62:
+/builddir/build/BUILD/qemu-8.1.0/host/include/generic/host/atomic128-ldst.h:68:15: error: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Werror,-Wsync-alignment]
+   68 |     } while (!__sync_bool_compare_and_swap_16(ptr_align, old, new.i));
+      |               ^
+In file included from ../accel/tcg/cputlb.c:32:
+In file included from /builddir/build/BUILD/qemu-8.1.0/include/exec/helper-proto-common.h:10:
+In file included from /builddir/build/BUILD/qemu-8.1.0/include/qemu/atomic128.h:61:
+/builddir/build/BUILD/qemu-8.1.0/host/include/generic/host/atomic128-cas.h:36:11: error: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Werror,-Wsync-alignment]
+   36 |     r.i = __sync_val_compare_and_swap_16(ptr_align, c.i, n.i);
+      |           ^
+2 errors generated.
+```"""
+reproduce = "n/a"
+additional = "n/a"