The analyze_read() methods on GuestSource, GuestPairSource,
SystemSource, and SystemPairSource were no-ops because these
source registers do not need read-tracking in the analyze phase.
However, gen_analyze_funcs.py unconditionally declares the
register-number variable (e.g. GsN) via decl_reg_num() for all
registers that are read or written.  When building with
hexagon-softmmu, the generated analyze function bodies are
compiled (outside the #ifndef CONFIG_USER_ONLY guard), and the
declared-but-unreferenced register-number variable triggers
-Werror=unused-variable under both gcc and clang.

Emit a (void) cast on the register number from analyze_read() to
suppress the warning.

Signed-off-by: Brian Cain <brian.cain@oss.qualcomm.com>
---
 target/hexagon/hex_common.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)