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; REQUIRES: asserts
; RUN: opt -p loop-vectorize -debug-only=loop-vectorize --disable-output -S %s 2>&1 | FileCheck %s
; CHECK-LABEL: LV: Checking a loop in 'latch_exit_cannot_compute_btc_due_to_step'
; CHECK: LV: Did not find one integer induction var.
; CHECK-NEXT: LV: Not vectorizing: Cannot vectorize uncountable loop.
; CHECK-NEXT: LV: Interleaving disabled by the pass manager
; CHECK-NEXT: LV: Not vectorizing: Cannot prove legality.
; CHECK-LABEL: LV: Checking a loop in 'header_exit_cannot_compute_btc_due_to_step'
; CHECK: LV: Found an induction variable.
; CHECK-NEXT: LV: Did not find one integer induction var.
; CHECK-NEXT: LV: Not vectorizing: Cannot vectorize uncountable loop.
; CHECK-NEXT: LV: Interleaving disabled by the pass manager
; CHECK-NEXT: LV: Not vectorizing: Cannot prove legality.
; CHECK-NOT: vector.body
define void @latch_exit_cannot_compute_btc_due_to_step(ptr %dst, i64 %step) {
entry:
br label %loop
loop: ; preds = %loop, %for.cond.us
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%iv.next = add i64 %iv, %step
%gep = getelementptr i8, ptr %dst, i64 %iv
store i8 0, ptr %gep, align 1
%ec = icmp eq i64 %iv.next, 1000
br i1 %ec, label %loop, label %exit
exit:
ret void
}
define void @header_exit_cannot_compute_btc_due_to_step(ptr %dst, i64 %step) {
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%iv.next = add i64 %iv, %step
%ec = icmp eq i64 %iv.next, 1000
br i1 %ec, label %loop.latch, label %exit
loop.latch:
%gep = getelementptr i8, ptr %dst, i64 %iv
store i8 0, ptr %gep, align 1
br label %loop.header
exit:
ret void
}
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