| ; RUN: opt -loop-idiom -S < %s | FileCheck %s |
| |
| target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" |
| target triple = "arm64-apple-ios8.0.0" |
| |
| ; When we replace the precondition with a ctpop, we need to ensure |
| ; that only the first branch reads the ctpop. The store prior |
| ; to that should continue to read from the original compare. |
| |
| ; CHECK: %tobool.5 = icmp ne i32 %num, 0 |
| ; CHECK: store i1 %tobool.5, i1* %ptr |
| |
| define internal fastcc i32 @num_bits_set(i32 %num, i1* %ptr) #1 { |
| entry: |
| %tobool.5 = icmp ne i32 %num, 0 |
| store i1 %tobool.5, i1* %ptr |
| br i1 %tobool.5, label %for.body.lr.ph, label %for.end |
| |
| for.body.lr.ph: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.lr.ph, %for.body |
| %count.07 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] |
| %num.addr.06 = phi i32 [ %num, %for.body.lr.ph ], [ %and, %for.body ] |
| %sub = add i32 %num.addr.06, -1 |
| %and = and i32 %sub, %num.addr.06 |
| %inc = add nsw i32 %count.07, 1 |
| %tobool = icmp ne i32 %and, 0 |
| br i1 %tobool, label %for.body, label %for.end |
| |
| for.end: ; preds = %for.cond.for.end_crit_edge, %entry |
| %count.0.lcssa = phi i32 [ %inc, %for.body ], [ 0, %entry ] |
| ret i32 %count.0.lcssa |
| } |
