diff options
Diffstat (limited to 'lib/hipe/x86/hipe_rtl_to_x86.erl')
| -rw-r--r-- | lib/hipe/x86/hipe_rtl_to_x86.erl | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/hipe/x86/hipe_rtl_to_x86.erl b/lib/hipe/x86/hipe_rtl_to_x86.erl index ccb9b7632b..851b7da2dd 100644 --- a/lib/hipe/x86/hipe_rtl_to_x86.erl +++ b/lib/hipe/x86/hipe_rtl_to_x86.erl @@ -257,7 +257,9 @@ conv_insn(I, Map, Data) -> conv_alu_nocc(Dst, Src1, 'add', Src2, Tail) -> case (not same_opnd(Dst, Src1)) andalso (not same_opnd(Dst, Src2)) - andalso (hipe_x86:is_temp(Src1) orelse hipe_x86:is_temp(Src2)) + %% We could use orelse instead of xor here to generate lea T1(T2), T3, but + %% they seem to move coalesce so well that move+add is better for them. + andalso (hipe_x86:is_temp(Src1) xor hipe_x86:is_temp(Src2)) of false -> conv_alu(Dst, Src1, 'add', Src2, Tail); true -> % Use LEA @@ -268,6 +270,16 @@ conv_alu_nocc(Dst, Src1, 'add', Src2, Tail) -> end, [hipe_x86:mk_lea(Mem, Dst) | Tail] end; +conv_alu_nocc(Dst, Src1, 'sub', Src2, Tail) -> + case (not same_opnd(Dst, Src1)) andalso hipe_x86:is_temp(Src1) + andalso (not hipe_x86:is_temp(Src2)) + of + false -> conv_alu(Dst, Src1, 'sub', Src2, Tail); + true -> % Use LEA + Imm = hipe_x86:mk_imm(-hipe_x86:imm_value(Src2)), + Mem = hipe_x86:mk_mem(Src1, Imm, typeof_dst(Dst)), + [hipe_x86:mk_lea(Mem, Dst) | Tail] + end; conv_alu_nocc(Dst, Src1, BinOp, Src2, Tail) -> conv_alu(Dst, Src1, BinOp, Src2, Tail). |