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; REQUIRES: asserts
; RUN: opt -S -passes=loop-vectorize -enable-vplan-native-path -disable-output -debug 2>&1 < %s | FileCheck %s
; CHECK-LABEL: LV: Found a loop: for.body
; CHECK: LV: Not vectorizing: Unsupported conditional branch.
; CHECK: loop not vectorized: loop control flow is not understood by vectorizer
; CHECK: LV: Not vectorizing: Unsupported outer loop.
@arr2 = external global [8 x i32], align 16
@arr = external global [8 x [8 x i32]], align 16
define i32 @foo(i32 %n) {
entry:
br label %for.body
for.body:
%iv.outer = phi i64 [ 0, %entry ], [%iv.outer.next, %for.inc ]
%arrayidx = getelementptr inbounds [8 x i32], ptr @arr2, i64 0, i64 %iv.outer
%ld1 = load i32, ptr %arrayidx, align 4
%0 = trunc i64 %iv.outer to i32
store i32 %0, ptr %arrayidx, align 4
%1 = trunc i64 %iv.outer to i32
%add = add nsw i32 %1, %n
%cmp.early = icmp eq i32 %ld1, 3
br i1 %cmp.early, label %for.early, label %for.body.inner
for.body.inner:
%iv.inner = phi i64 [ 0, %for.body ], [ %iv.inner.next, %for.body.inner ]
%arrayidx7 = getelementptr inbounds [8 x [8 x i32]], ptr @arr, i64 0, i64 %iv.inner, i64 %iv.outer
store i32 %add, ptr %arrayidx7, align 4
%iv.inner.next = add nuw nsw i64 %iv.inner, 1
%cmp.inner = icmp eq i64 %iv.inner.next, 8
br i1 %cmp.inner, label %for.inc, label %for.body.inner
for.inc:
%iv.outer.next = add nuw nsw i64 %iv.outer, 1
%cmp.outer = icmp eq i64%iv.outer.next, 8
br i1 %cmp.outer, label %for.end, label %for.body, !llvm.loop !1
for.early:
ret i32 1
for.end:
ret i32 0
}
!1 = distinct !{!1, !2, !3}
!2 = !{!"llvm.loop.vectorize.width", i32 4}
!3 = !{!"llvm.loop.vectorize.enable", i1 true}
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