1 ; RUN: llc < %s -march=x86 | FileCheck %s 2 ; RUN: llc -no-phi-elim-live-out-early-exit -terminal-rule < %s -march=x86 | FileCheck %s 3 ; PR2659 4 5 define i32 @binomial(i32 %n, i32 %k) nounwind { 6 entry: 7 %cmp = icmp ugt i32 %k, %n ; <i1> [#uses=1] 8 br i1 %cmp, label %ifthen, label %forcond.preheader 9 10 forcond.preheader: ; preds = %entry 11 %cmp44 = icmp eq i32 %k, 0 ; <i1> [#uses=1] 12 br i1 %cmp44, label %afterfor, label %forbody 13 14 ifthen: ; preds = %entry 15 ret i32 0 16 ; CHECK: forbody 17 ; CHECK-NOT: mov 18 forbody: ; preds = %forbody, %forcond.preheader 19 %indvar = phi i32 [ 0, %forcond.preheader ], [ %divisor.02, %forbody ] ; <i32> [#uses=3] 20 %accumulator.01 = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ] ; <i32> [#uses=1] 21 %divisor.02 = add i32 %indvar, 1 ; <i32> [#uses=2] 22 %n.addr.03 = sub i32 %n, %indvar ; <i32> [#uses=1] 23 %mul = mul i32 %n.addr.03, %accumulator.01 ; <i32> [#uses=1] 24 %div = udiv i32 %mul, %divisor.02 ; <i32> [#uses=2] 25 %inc = add i32 %indvar, 2 ; <i32> [#uses=1] 26 %cmp4 = icmp ugt i32 %inc, %k ; <i1> [#uses=1] 27 br i1 %cmp4, label %afterfor, label %forbody 28 29 afterfor: ; preds = %forbody, %forcond.preheader 30 %accumulator.0.lcssa = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ] ; <i32> [#uses=1] 31 ret i32 %accumulator.0.lcssa 32 } 33
