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PR target/16532 * config/sparc/sparc.c (struct machine_function): New field 'leaf_function_p' and 'prologue_data_valid_p'. (sparc_leaf_function_p, sparc_prologue_data_valid_p): New macro to conveniently access the above fields. (TARGET_LATE_RTL_PROLOGUE_EPILOGUE): Delete. (eligible_for_return_delay): Use 'sparc_leaf_function_p' instead of the generic flavor 'current_function_uses_only_leaf_regs'. (eligible_for_sibcall_delay): Likewise. (sparc_expand_prologue): Compute 'sparc_leaf_function_p' and set 'sparc_prologue_data_valid_p'. Use 'sparc_leaf_function_p'. (sparc_asm_function_prologue): Add sanity check for the assumption made in 'sparc_expand_prologue'. Use 'sparc_leaf_function_p'. (sparc_can_use_return_insn_p): New function. (sparc_expand_epilogue): Use 'sparc_leaf_function_p'. (output_restore): Likewise. (output_sibcall): Likewise. (sparc_output_mi_thunk): Likewise. * config/sparc/sparc-protos.h (sparc_can_use_return_insn_p): Declare. * config/sparc/sparc.md (return): New expander. * config/sparc/sparc.h (INITIAL_ELIMINATION_OFFSET): Minor tweak. From-SVN: r88220
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