re PR tree-optimization/17739 (tree-optimizers extend the lifetime of a hard register...

re PR tree-optimization/17739 (tree-optimizers extend the lifetime of a hard register variable)

        PR 17739
        * tree-gimple.c (is_gimple_reg): Reject hard registers.
        (is_gimple_asm_val): New.
        * tree-gimple.h (is_gimple_asm_val): Declare.
        * gimplify.c (gimplify_asm_expr): Use it.
        * tree-pretty-print.c (print_declaration): Dump hard regs.
        * tree-outof-ssa.c (check_replaceable): Don't check for hard regs.
        * tree-ssa-copyrename.c (copy_rename_partition_coalesce): Likewise.
        * tree-ssa-pre.c (is_undefined_value): Likewise.
        * tree-ssa-copy.c (may_propagate_copy): Likewise.
        (may_propagate_copy_into_asm): Protect DECL_HARD_REGISTER.
        * tree-ssa.c (warn_uninit): Likewise.
        * tree.h (DECL_HARD_REGISTER): Check for VAR_DECL.

From-SVN: r88321