1 ; RUN: opt -loop-idiom -S < %s | FileCheck %s 2 3 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" 4 target triple = "arm64-apple-ios8.0.0" 5 6 ; When we replace the precondition with a ctpop, we need to ensure 7 ; that only the first branch reads the ctpop. The store prior 8 ; to that should continue to read from the original compare. 9 10 ; CHECK: %tobool.5 = icmp ne i32 %num, 0 11 ; CHECK: store i1 %tobool.5, i1* %ptr 12 13 define internal fastcc i32 @num_bits_set(i32 %num, i1* %ptr) #1 { 14 entry: 15 %tobool.5 = icmp ne i32 %num, 0 16 store i1 %tobool.5, i1* %ptr 17 br i1 %tobool.5, label %for.body.lr.ph, label %for.end 18 19 for.body.lr.ph: ; preds = %entry 20 br label %for.body 21 22 for.body: ; preds = %for.body.lr.ph, %for.body 23 %count.07 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] 24 %num.addr.06 = phi i32 [ %num, %for.body.lr.ph ], [ %and, %for.body ] 25 %sub = add i32 %num.addr.06, -1 26 %and = and i32 %sub, %num.addr.06 27 %inc = add nsw i32 %count.07, 1 28 %tobool = icmp ne i32 %and, 0 29 br i1 %tobool, label %for.body, label %for.end 30 31 for.end: ; preds = %for.cond.for.end_crit_edge, %entry 32 %count.0.lcssa = phi i32 [ %inc, %for.body ], [ 0, %entry ] 33 ret i32 %count.0.lcssa 34 }
