gccrs: add checks for division by zero and left shift overflow #3279
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These are ported from the c-family code c-warn.cc and c/c-typchk.cc Fixes #2394 gcc/rust/ChangeLog: * backend/rust-constexpr.cc (eval_store_expression): check for null (eval_call_expression): remove bad warning * rust-gcc.cc (arithmetic_or_logical_expression): add warnings gcc/testsuite/ChangeLog: * rust/compile/issue-2394.rs: New test. Signed-off-by: Philip Herron <[email protected]>
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These are ported from the c-family code c-warn.cc and c-typchk.cc
Fixes #2394
gcc/rust/ChangeLog:
gcc/testsuite/ChangeLog: