Hi, This patch is just using a more readable pattern for "rldicl x,x,0,32" to clean high 32bits. Old pattern looks like: r118:DI=zero_extend(r120:DI#0) new pattern looks like: r118:DI=r120:DI&0xffffffff
Bootstrap and regtest pass on ppc64{,le}. Is this ok for trunk? BR, Jeff (Jiufu) gcc/ChangeLog: * config/rs6000/rs6000.cc (rs6000_emit_set_long_const): Update zero_extend(reg:DI#0) to reg:DI&0xffffffff. --- gcc/config/rs6000/rs6000.cc | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index eb7ad5e954f..5efe9b22d8b 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -10267,10 +10267,7 @@ rs6000_emit_set_long_const (rtx dest, HOST_WIDE_INT c) emit_move_insn (copy_rtx (temp), gen_rtx_IOR (DImode, copy_rtx (temp), GEN_INT (ud1))); - emit_move_insn (dest, - gen_rtx_ZERO_EXTEND (DImode, - gen_lowpart (SImode, - copy_rtx (temp)))); + emit_move_insn (dest, gen_rtx_AND (DImode, temp, GEN_INT (0xffffffff))); } else if (ud1 == ud3 && ud2 == ud4) { -- 2.17.1