; RUN: opt < %s -loop-vectorize -debug-only=loop-vectorize -S -disable-output 2>&1 | FileCheck %s ; REQUIRES: asserts ; Make sure LV legal bails out when there is no exiting block ; CHECK-LABEL: "no_exiting_block" ; CHECK: LV: Not vectorizing: The loop must have a unique exit block. define i32 @no_exiting_block() { entry: br label %for.body for.body: %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ], [%inc, %for.second] %inc = add nsw i32 %i.02, 1 %cmp = icmp slt i32 %inc, 16 br i1 %cmp, label %for.body, label %for.second for.second: br label %for.body } ; Make sure LV legal bails out when there is a non-int, non-ptr phi ; CHECK-LABEL: "invalid_phi_types" ; CHECK: LV: Not vectorizing: Found a non-int non-pointer PHI. define i32 @invalid_phi_types() { entry: br label %for.body for.body: %i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ] %vec.sum.02 = phi <2 x i32> [ zeroinitializer, %entry ], [ , %for.body ] %inc = add nsw i32 %i.02, 1 %cmp = icmp slt i32 %inc, 16 br i1 %cmp, label %for.body, label %for.end for.end: ret i32 0 } ; D40973 ; Make sure LV legal bails out when the loop doesn't have a legal pre-header. ; CHECK-LABEL: "inc" ; CHECK: LV: Not vectorizing: Loop doesn't have a legal pre-header. define void @inc(i32 %n, i8* %P) { %1 = icmp sgt i32 %n, 0 br i1 %1, label %BB1, label %BB2 BB1: indirectbr i8* %P, [label %.lr.ph] BB2: br label %.lr.ph .lr.ph: %indvars.iv = phi i32 [ %indvars.iv.next, %.lr.ph ], [ 0, %BB1 ], [ 0, %BB2 ] %indvars.iv.next = add i32 %indvars.iv, 1 %exitcond = icmp eq i32 %indvars.iv.next, %n br i1 %exitcond, label %._crit_edge, label %.lr.ph ._crit_edge: ret void }