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; RUN: opt < %s -S -O2 -unroll-runtime=true | FileCheck %s
; Check runtime unrolling prologue can be promoted by LICM pass.
; CHECK: entry:
; CHECK: %xtraiter
; CHECK: %lcmp.mod
; CHECK: loop1:
; CHECK: br i1 %lcmp.mod
; CHECK: loop2.prol:
define void @unroll(i32 %iter, i32* %addr1, i32* %addr2) nounwind {
entry:
br label %loop1
loop1:
%iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ]
%offset1 = getelementptr i32, i32* %addr1, i32 %iv1
store i32 %iv1, i32* %offset1, align 4
br label %loop2.header
loop2.header:
%e = icmp uge i32 %iter, 1
br i1 %e, label %loop2, label %exit2
loop2:
%iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ]
%offset2 = getelementptr i32, i32* %addr2, i32 %iv2
store i32 %iv2, i32* %offset2, align 4
%inc2 = add i32 %iv2, 1
%exitcnd2 = icmp uge i32 %inc2, %iter
br i1 %exitcnd2, label %exit2, label %loop2
exit2:
br label %loop1.latch
loop1.latch:
%inc1 = add i32 %iv1, 1
%exitcnd1 = icmp uge i32 %inc1, 1024
br i1 %exitcnd1, label %exit, label %loop1
exit:
ret void
}
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