The lr.w instruction used to read the value from memory sign-extends
the value read from memory. GCC sign-extends the 32-bit comparison
value passed in whereas clang currently does not. As a result, if the
value being compared has the MSB set, the comparison fails for matching
32-bit values when compiled with clang.
Use a cast to explicitly sign-extend the unsigned comparison value. This
works with both GCC and clang.
There is commentary in the RISC-V spec that suggests that GCC's approach
is more correct, but it is not clear if the commentary in the RISC-V spec is
Obtained from: Axiado