https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103037
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Martin Liška from comment #1) > Confirmed, started with r11-6100-gd41b097350d3c5d0. Hmm, it is definitely PRE causing the problem: [changed] ANTIC_IN[7] := { _20 (0014), a_25 (0016), iftmp.0_10 (0008), _29 (0018), {trunc_div_expr,_29,iftmp.0_10} (0004), {nop_expr,_5} (0005), {plus_expr,a_25,3} (0012) } S[7] := { } Applying pattern match.pd:340, gimple-match.c:16554 ANTIC_OUT[6] := { _20 (0014), iftmp.0_14 (0011), a_25 (0016), {plus_expr,a_25,3} (0012) } [changed] ANTIC_IN[6] := { _20 (0014), iftmp.0_14 (0011), a_25 (0016), {plus_expr,a_25,3} (0012) } S[6] := { _20 (0014), iftmp.0_14 (0011), a_25 (0016), {plus_expr,a_25,3} (0012) } Created SSA_NAME representative pretmp_16 for expression:{trunc_div_expr,_28,_3} (0020) ANTIC_OUT[5] := { _20 (0014), a_25 (0016), _28 (0017), iftmp.0_15 (0002), {plus_expr,a_25,3} (0012), {trunc_div_expr,_28,_3} (0020), {nop_expr,pretmp_16} (0021) } [changed] ANTIC_IN[5] := { _20 (0014), a_25 (0016), _19 (0013), {nop_expr,_19} (0002), _28 (0017), {plus_expr,a_25,3} (0012), {trunc_div_expr,_28,_3} (0020), {nop_expr,pretmp_16} (0021) } S[5] := { _20 (0014), a_25 (0016), _28 (0017), {plus_expr,a_25,3} (0012), {trunc_div_expr,_28,_3} (0020), {nop_expr,pretmp_16} (0021) } Applying pattern match.pd:350, gimple-match.c:8615 ANTIC_OUT[9] := { _20 (0014), a_25 (0016), _19 (0013), {nop_expr,_19} (0002), {plus_expr,a_25,3} (0012) } [changed] ANTIC_IN[9] := { _20 (0014), a_25 (0016), _19 (0013), {nop_expr,_19} (0002), {plus_expr,a_25,3} (0012) } S[9] := { _20 (0014), a_25 (0016), _19 (0013), {nop_expr,_19} (0002), {plus_expr,a_25,3} (0012) } Applying pattern match.pd:350, gimple-match.c:8615