| ; RUN: opt < %s -S -passes=loop-unroll -pass-remarks=loop-unroll -unroll-count=16 2>&1 | FileCheck -check-prefix=COMPLETE-UNROLL %s |
| ; RUN: opt < %s -S -passes=loop-unroll -pass-remarks=loop-unroll -unroll-count=4 2>&1 | FileCheck -check-prefix=PARTIAL-UNROLL %s |
| ; RUN: opt < %s -S -passes=loop-unroll -pass-remarks=loop-unroll -unroll-count=4 -unroll-runtime=true -unroll-remainder 2>&1 | FileCheck %s --check-prefix=RUNTIME-UNROLL |
| |
| ; COMPLETE-UNROLL: remark: {{.*}}: completely unrolled loop with 16 iterations |
| ; PARTIAL-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4 |
| ; RUNTIME-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4 |
| |
| define i32 @sum() { |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %entry |
| %s.06 = phi i32 [ 0, %entry ], [ %add1, %for.body ] |
| %i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %add = add nsw i32 %i.05, 4 |
| %call = tail call i32 @baz(i32 %add) #2 |
| %add1 = add nsw i32 %call, %s.06 |
| %inc = add nsw i32 %i.05, 1 |
| %exitcond = icmp eq i32 %inc, 16 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body |
| ret i32 %add1 |
| } |
| |
| ; RUNTIME-UNROLL-NOT: remark: {{.*}}: completely unrolled loop with 3 iterations |
| ; RUNTIME-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4 |
| |
| define i32 @runtime(i32 %n) { |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %entry |
| %s.06 = phi i32 [ 0, %entry ], [ %add1, %for.body ] |
| %i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %add = add nsw i32 %i.05, 4 |
| %call = tail call i32 @baz(i32 %add) #2 |
| %add1 = add nsw i32 %call, %s.06 |
| %inc = add nsw i32 %i.05, 1 |
| %exitcond = icmp eq i32 %inc, %n |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body |
| ret i32 %add1 |
| } |
| |
| declare i32 @baz(i32) |