1 ; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=16 2>&1 | FileCheck -check-prefix=COMPLETE-UNROLL %s 2 ; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=4 2>&1 | FileCheck -check-prefix=PARTIAL-UNROLL %s 3 ; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=4 -unroll-runtime=true -unroll-remainder 2>&1 | FileCheck %s --check-prefix=RUNTIME-UNROLL 4 5 ; COMPLETE-UNROLL: remark: {{.*}}: completely unrolled loop with 16 iterations 6 ; PARTIAL-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4 7 ; RUNTIME-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4 8 9 define i32 @sum() { 10 entry: 11 br label %for.body 12 13 for.body: ; preds = %for.body, %entry 14 %s.06 = phi i32 [ 0, %entry ], [ %add1, %for.body ] 15 %i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 16 %add = add nsw i32 %i.05, 4 17 %call = tail call i32 @baz(i32 %add) #2 18 %add1 = add nsw i32 %call, %s.06 19 %inc = add nsw i32 %i.05, 1 20 %exitcond = icmp eq i32 %inc, 16 21 br i1 %exitcond, label %for.end, label %for.body 22 23 for.end: ; preds = %for.body 24 ret i32 %add1 25 } 26 27 ; RUNTIME-UNROLL-NOT: remark: {{.*}}: completely unrolled loop with 3 iterations 28 ; RUNTIME-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4 29 30 define i32 @runtime(i32 %n) { 31 entry: 32 br label %for.body 33 34 for.body: ; preds = %for.body, %entry 35 %s.06 = phi i32 [ 0, %entry ], [ %add1, %for.body ] 36 %i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 37 %add = add nsw i32 %i.05, 4 38 %call = tail call i32 @baz(i32 %add) #2 39 %add1 = add nsw i32 %call, %s.06 40 %inc = add nsw i32 %i.05, 1 41 %exitcond = icmp eq i32 %inc, %n 42 br i1 %exitcond, label %for.end, label %for.body 43 44 for.end: ; preds = %for.body 45 ret i32 %add1 46 } 47 48 declare i32 @baz(i32)
