1 ; RUN: opt < %s -S -O2 -unroll-runtime=true -unroll-runtime-epilog=true | FileCheck %s -check-prefix=EPILOG 2 ; RUN: opt < %s -S -O2 -unroll-runtime=true -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG 3 4 ; Check runtime unrolling prologue can be promoted by LICM pass. 5 6 ; EPILOG: entry: 7 ; EPILOG: %xtraiter 8 ; EPILOG: %lcmp.mod 9 ; EPILOG: loop1: 10 ; EPILOG: br i1 %lcmp.mod 11 ; EPILOG: loop2.epil: 12 13 ; PROLOG: entry: 14 ; PROLOG: %xtraiter 15 ; PROLOG: %lcmp.mod 16 ; PROLOG: loop1: 17 ; PROLOG: br i1 %lcmp.mod 18 ; PROLOG: loop2.prol: 19 20 define void @unroll(i32 %iter, i32* %addr1, i32* %addr2) nounwind { 21 entry: 22 br label %loop1 23 24 loop1: 25 %iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ] 26 %offset1 = getelementptr i32, i32* %addr1, i32 %iv1 27 store i32 %iv1, i32* %offset1, align 4 28 br label %loop2.header 29 30 loop2.header: 31 %e = icmp uge i32 %iter, 1 32 br i1 %e, label %loop2, label %exit2 33 34 loop2: 35 %iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ] 36 %offset2 = getelementptr i32, i32* %addr2, i32 %iv2 37 store i32 %iv2, i32* %offset2, align 4 38 %inc2 = add i32 %iv2, 1 39 %exitcnd2 = icmp uge i32 %inc2, %iter 40 br i1 %exitcnd2, label %exit2, label %loop2 41 42 exit2: 43 br label %loop1.latch 44 45 loop1.latch: 46 %inc1 = add i32 %iv1, 1 47 %exitcnd1 = icmp uge i32 %inc1, 1024 48 br i1 %exitcnd1, label %exit, label %loop1 49 50 exit: 51 ret void 52 } 53
