| ; RUN: opt -S -loop-reroll %s | FileCheck %s |
| target triple = "aarch64--linux-gnu" |
| @buf = global [16 x i8] c"\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A", align 1 |
| |
| define i32 @test1(i32 %len, i8* nocapture readonly %buf) #0 { |
| entry: |
| %cmp.13 = icmp sgt i32 %len, 1 |
| br i1 %cmp.13, label %while.body.lr.ph, label %while.end |
| |
| while.body.lr.ph: ; preds = %entry |
| br label %while.body |
| |
| while.body: |
| ;CHECK-LABEL: while.body: |
| ;CHECK-NEXT: %indvar = phi i32 [ %indvar.next, %while.body ], [ 0, %while.body.lr.ph ] |
| ;CHECK-NEXT: %sum4.015 = phi i64 [ 0, %while.body.lr.ph ], [ %add, %while.body ] |
| ;CHECK-NOT: %sub5 = add nsw i32 %len.addr.014, -1 |
| ;CHECK-NOT: %sub5 = add nsw i32 %len.addr.014, -2 |
| ;CHECK: br i1 %exitcond, label %while.cond.while.end_crit_edge, label %while.body |
| |
| %sum4.015 = phi i64 [ 0, %while.body.lr.ph ], [ %add4, %while.body ] |
| %len.addr.014 = phi i32 [ %len, %while.body.lr.ph ], [ %sub5, %while.body ] |
| %idxprom = sext i32 %len.addr.014 to i64 |
| %arrayidx = getelementptr inbounds i8, i8* %buf, i64 %idxprom |
| %0 = load i8, i8* %arrayidx, align 1 |
| %conv = zext i8 %0 to i64 |
| %add = add i64 %conv, %sum4.015 |
| %sub = add nsw i32 %len.addr.014, -1 |
| %idxprom1 = sext i32 %sub to i64 |
| %arrayidx2 = getelementptr inbounds i8, i8* %buf, i64 %idxprom1 |
| %1 = load i8, i8* %arrayidx2, align 1 |
| %conv3 = zext i8 %1 to i64 |
| %add4 = add i64 %add, %conv3 |
| %sub5 = add nsw i32 %len.addr.014, -2 |
| %cmp = icmp sgt i32 %sub5, 1 |
| br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge |
| |
| while.cond.while.end_crit_edge: ; preds = %while.body |
| %add4.lcssa = phi i64 [ %add4, %while.body ] |
| %phitmp = trunc i64 %add4.lcssa to i32 |
| br label %while.end |
| |
| while.end: ; preds = %while.cond.while.end_crit_edge, %entry |
| %sum4.0.lcssa = phi i32 [ %phitmp, %while.cond.while.end_crit_edge ], [ 0, %entry ] |
| ret i32 %sum4.0.lcssa |
| unreachable |
| } |
| |