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* config/rs6000/rs6000.c (rs6000_emit_stack_reset): Return generated insn if it is changing sp. Use gen_add3_insn instead of conditionally gen_addsi3 and gen_adddi3. (offset_below_red_zone_p): New static inline function. (rs6000_emit_epilogue): Emit needed epilogue unwind info. Use gen_add3_insn instead of conditionally gen_addsi3 and gen_adddi3. * config/rs6000/ppc-asm.h: Include auto-host.h. (CFI_STARTPROC, CFI_ENDPROC, CFI_DEF_CFA_REGISTER, CFI_OFFSET, CFI_RESTORE): Define. * config/rs6000/crtresxgpr.asm: Add unwind info. * config/rs6000/crtresxfpr.asm: Likewise. * config/rs6000/crtresgpr.asm: Likewise. * config/rs6000/crtresfpr.asm: Likewise. * config/rs6000/crtsavgpr.asm: Likewise. * config/rs6000/crtsavfpr.asm: Likewise. From-SVN: r148138
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