https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67675
Oleg Endo <olegendo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-09-22 Ever confirmed|0 |1 --- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> --- This fixes it: Index: gcc/config/sh/sh-mem.cc =================================================================== --- gcc/config/sh/sh-mem.cc (revision 227970) +++ gcc/config/sh/sh-mem.cc (working copy) @@ -224,11 +224,10 @@ rtx_code_label *L_loop_long = gen_label_rtx (); rtx_code_label *L_end_loop_long = gen_label_rtx (); - int align = INTVAL (operands[3]); + const unsigned int addr1_alignment = MEM_ALIGN (operands[1]) / BITS_PER_UNIT; + const unsigned int addr2_alignment = MEM_ALIGN (operands[2]) / BITS_PER_UNIT; - emit_move_insn (tmp0, const0_rtx); - - if (align < 4) + if (addr1_alignment < 4 && addr2_alignment < 4) { emit_insn (gen_iorsi3 (tmp1, s1_addr, s2_addr)); emit_insn (gen_tstsi_t (tmp1, GEN_INT (3))); @@ -235,6 +234,18 @@ jump = emit_jump_insn (gen_branch_false (L_loop_byte)); add_int_reg_note (jump, REG_BR_PROB, prob_likely); } + else if (addr1_alignment < 4 && addr2_alignment >= 4) + { + emit_insn (gen_tstsi_t (s1_addr, GEN_INT (3))); + jump = emit_jump_insn (gen_branch_false (L_loop_byte)); + add_int_reg_note (jump, REG_BR_PROB, prob_likely); + } + else if (addr1_alignment >= 4 && addr2_alignment < 4) + { + emit_insn (gen_tstsi_t (s2_addr, GEN_INT (3))); + jump = emit_jump_insn (gen_branch_false (L_loop_byte)); + add_int_reg_note (jump, REG_BR_PROB, prob_likely); + } addr1 = adjust_automodify_address (addr1, SImode, s1_addr, 0); addr2 = adjust_automodify_address (addr2, SImode, s2_addr, 0);