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1; REQUIRES: asserts2; RUN: opt -S -passes=loop-vectorize -enable-vplan-native-path -disable-output -debug 2>&1 < %s | FileCheck %s3 4; CHECK-LABEL: LV: Found a loop: for.body5; CHECK: LV: Not vectorizing: Unsupported conditional branch.6; CHECK: loop not vectorized: loop control flow is not understood by vectorizer7; CHECK: LV: Not vectorizing: Unsupported outer loop.8 9@arr2 = external global [8 x i32], align 1610@arr = external global [8 x [8 x i32]], align 1611 12define i32 @foo(i32 %n) {13entry:14 br label %for.body15 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.outer19 %ld1 = load i32, ptr %arrayidx, align 420 %0 = trunc i64 %iv.outer to i3221 store i32 %0, ptr %arrayidx, align 422 %1 = trunc i64 %iv.outer to i3223 %add = add nsw i32 %1, %n24 %cmp.early = icmp eq i32 %ld1, 325 br i1 %cmp.early, label %for.early, label %for.body.inner26 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.outer30 store i32 %add, ptr %arrayidx7, align 431 %iv.inner.next = add nuw nsw i64 %iv.inner, 132 %cmp.inner = icmp eq i64 %iv.inner.next, 833 br i1 %cmp.inner, label %for.inc, label %for.body.inner34 35for.inc:36 %iv.outer.next = add nuw nsw i64 %iv.outer, 137 %cmp.outer = icmp eq i64%iv.outer.next, 838 br i1 %cmp.outer, label %for.end, label %for.body, !llvm.loop !139 40for.early:41 ret i32 142 43for.end:44 ret i32 045}46 47!1 = distinct !{!1, !2, !3}48!2 = !{!"llvm.loop.vectorize.width", i32 4}49!3 = !{!"llvm.loop.vectorize.enable", i1 true}50