1 ; RUN: opt < %s -S -O2 -unroll-runtime=true | FileCheck %s 2 3 ; Check runtime unrolling prologue can be promoted by LICM pass. 4 5 ; CHECK: entry: 6 ; CHECK: %xtraiter 7 ; CHECK: %lcmp.mod 8 ; CHECK: loop1: 9 ; CHECK: br i1 %lcmp.mod 10 ; CHECK: loop2.prol: 11 12 define void @unroll(i32 %iter, i32* %addr1, i32* %addr2) nounwind { 13 entry: 14 br label %loop1 15 16 loop1: 17 %iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ] 18 %offset1 = getelementptr i32, i32* %addr1, i32 %iv1 19 store i32 %iv1, i32* %offset1, align 4 20 br label %loop2.header 21 22 loop2.header: 23 %e = icmp uge i32 %iter, 1 24 br i1 %e, label %loop2, label %exit2 25 26 loop2: 27 %iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ] 28 %offset2 = getelementptr i32, i32* %addr2, i32 %iv2 29 store i32 %iv2, i32* %offset2, align 4 30 %inc2 = add i32 %iv2, 1 31 %exitcnd2 = icmp uge i32 %inc2, %iter 32 br i1 %exitcnd2, label %exit2, label %loop2 33 34 exit2: 35 br label %loop1.latch 36 37 loop1.latch: 38 %inc1 = add i32 %iv1, 1 39 %exitcnd1 = icmp uge i32 %inc1, 1024 40 br i1 %exitcnd1, label %exit, label %loop1 41 42 exit: 43 ret void 44 } 45
