1 ; RUN: opt < %s -loop-vectorize -debug-only=loop-vectorize -S -disable-output 2>&1 | FileCheck %s
4 ; Make sure LV legal bails out when the exiting block != loop latch.
5 ; CHECK-LABEL: "latch_is_not_exiting"
6 ; CHECK: LV: Not vectorizing: The exiting block is not the loop latch.
7 define i32 @latch_is_not_exiting() {
12 %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ], [%inc, %for.second]
13 %inc = add nsw i32 %i.02, 1
14 %cmp = icmp slt i32 %inc, 16
15 br i1 %cmp, label %for.body, label %for.second
18 %cmps = icmp sgt i32 %inc, 16
19 br i1 %cmps, label %for.body, label %for.end
25 ; Make sure LV legal bails out when there is no exiting block
26 ; CHECK-LABEL: "no_exiting_block"
27 ; CHECK: LV: Not vectorizing: The loop must have an exiting block.
28 define i32 @no_exiting_block() {
33 %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ], [%inc, %for.second]
34 %inc = add nsw i32 %i.02, 1
35 %cmp = icmp slt i32 %inc, 16
36 br i1 %cmp, label %for.body, label %for.second
42 ; Make sure LV legal bails out when there is a non-int, non-ptr phi
43 ; CHECK-LABEL: "invalid_phi_types"
44 ; CHECK: LV: Not vectorizing: Found a non-int non-pointer PHI.
45 define i32 @invalid_phi_types() {
50 %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
51 %vec.sum.02 = phi <2 x i32> [ zeroinitializer, %entry ], [ <i32 8, i32 8>, %for.body ]
52 %inc = add nsw i32 %i.02, 1
53 %cmp = icmp slt i32 %inc, 16
54 br i1 %cmp, label %for.body, label %for.end
61 ; Make sure LV legal bails out when the loop doesn't have a legal pre-header.
63 ; CHECK: LV: Not vectorizing: Loop doesn't have a legal pre-header.
64 define void @inc(i32 %n, i8* %P) {
65 %1 = icmp sgt i32 %n, 0
66 br i1 %1, label %BB1, label %BB2
69 indirectbr i8* %P, [label %.lr.ph]
75 %indvars.iv = phi i32 [ %indvars.iv.next, %.lr.ph ], [ 0, %BB1 ], [ 0, %BB2 ]
76 %indvars.iv.next = add i32 %indvars.iv, 1
77 %exitcond = icmp eq i32 %indvars.iv.next, %n
78 br i1 %exitcond, label %._crit_edge, label %.lr.ph