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; RUN: opt -S -passes=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, ptr 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, ptr %buf, i64 %idxprom
%0 = load i8, ptr %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, ptr %buf, i64 %idxprom1
%1 = load i8, ptr %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
}
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