tcg: Allocate TEMP_VAL_MEM frame in temp_load()

tcg: Allocate TEMP_VAL_MEM frame in temp_load()

Be sure to allocate the temp frame if it wasn't.

In the resolved issues, incomplete dead code elimination left a load
at the top of an unreachable loop.  We simply need to allocate the
stack slot to avoid crashing.

Fixes: c896fe29d6c ("TCG code generator")
Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Reported-by: Helge Konetzka <hk@zapateado.de>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2891
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2899
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250401144332.41615-1-philmd@linaro.org>
(cherry picked from commit e139bc4b1772575e1f2dcf8e3dbe1df2b684ef1f)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>