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Add alignment check for short load/store instructions used for sdata, as they request 32-bit aligned short immediate. Use sdata symbol alignment information and emit scalled loads/stores whenever is possible. The scalled address will extend the access range for sdata symbols. Allow 64-bit datum into small data section, if double load/store instructions are present. gcc/ 2017-04-12 Claudiu Zissulescu <claziss@synopsys.com> * config/arc/arc-protos.h (compact_sda_memory_operand): Update prototype. * config/arc/arc.c (arc_print_operand): Output scalled address for sdata whenever is possible. (arc_in_small_data_p): Allow sdata for 64bit datum when double load/stores are available. (compact_sda_memory_operand): Check for the alignment required by code density instructions. * config/arc/arc.md (movsi_insn): Use newly introduced Us0 constraint. * config/arc/constraints.md (Usd): Update constraint. (Us0): New constraint. (Usc): Update constraint. gcc/testsuite/ 2017-04-12 Claudiu Zissulescu <claziss@synopsys.com> * gcc.target/arc/sdata-3.c: New file. From-SVN: r251562
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