1 ; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-dynamic-cost-savings-discount=1000 -unroll-threshold=10 -unroll-percent-dynamic-cost-saved-threshold=50 | FileCheck %s 2 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 3 4 define i64 @propagate_loop_phis() { 5 ; CHECK-LABEL: @propagate_loop_phis( 6 ; CHECK-NOT: br i1 7 ; CHECK: ret i64 3 8 entry: 9 br label %loop 10 11 loop: 12 %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] 13 %x0 = phi i64 [ 0, %entry ], [ %x2, %loop ] 14 %x1 = or i64 %x0, 1 15 %x2 = or i64 %x1, 2 16 %inc = add nuw nsw i64 %iv, 1 17 %cond = icmp sge i64 %inc, 10 18 br i1 %cond, label %loop.end, label %loop 19 20 loop.end: 21 %x.lcssa = phi i64 [ %x2, %loop ] 22 ret i64 %x.lcssa 23 } 24
