1; REQUIRES: asserts 2; RUN: opt -S -passes=loop-vectorize -enable-vplan-native-path -disable-output -debug 2>&1 < %s | FileCheck %s 3 4; CHECK-LABEL: LV: Found a loop: for.body 5; CHECK: LV: Not vectorizing: Unsupported conditional branch. 6; CHECK: loop not vectorized: loop control flow is not understood by vectorizer 7; CHECK: LV: Not vectorizing: Unsupported outer loop. 8 9@arr2 = external global [8 x i32], align 16 10@arr = external global [8 x [8 x i32]], align 16 11 12define i32 @foo(i32 %n) { 13entry: 14 br label %for.body 15 16for.body: 17 %iv.outer = phi i64 [ 0, %entry ], [%iv.outer.next, %for.inc ] 18 %arrayidx = getelementptr inbounds [8 x i32], ptr @arr2, i64 0, i64 %iv.outer 19 %ld1 = load i32, ptr %arrayidx, align 4 20 %0 = trunc i64 %iv.outer to i32 21 store i32 %0, ptr %arrayidx, align 4 22 %1 = trunc i64 %iv.outer to i32 23 %add = add nsw i32 %1, %n 24 %cmp.early = icmp eq i32 %ld1, 3 25 br i1 %cmp.early, label %for.early, label %for.body.inner 26 27for.body.inner: 28 %iv.inner = phi i64 [ 0, %for.body ], [ %iv.inner.next, %for.body.inner ] 29 %arrayidx7 = getelementptr inbounds [8 x [8 x i32]], ptr @arr, i64 0, i64 %iv.inner, i64 %iv.outer 30 store i32 %add, ptr %arrayidx7, align 4 31 %iv.inner.next = add nuw nsw i64 %iv.inner, 1 32 %cmp.inner = icmp eq i64 %iv.inner.next, 8 33 br i1 %cmp.inner, label %for.inc, label %for.body.inner 34 35for.inc: 36 %iv.outer.next = add nuw nsw i64 %iv.outer, 1 37 %cmp.outer = icmp eq i64%iv.outer.next, 8 38 br i1 %cmp.outer, label %for.end, label %for.body, !llvm.loop !1 39 40for.early: 41 ret i32 1 42 43for.end: 44 ret i32 0 45} 46 47!1 = distinct !{!1, !2, !3} 48!2 = !{!"llvm.loop.vectorize.width", i32 4} 49!3 = !{!"llvm.loop.vectorize.enable", i1 true} 50