branch-for-predicated-block.ll
1.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
; REQUIRES: asserts
; RUN: opt -mtriple=s390x-unknown-linux -mcpu=z13 -loop-vectorize \
; RUN: -force-vector-width=2 -debug-only=loop-vectorize \
; RUN: -disable-output < %s 2>&1 | FileCheck %s
; Check costs for branches inside a vectorized loop around predicated
; blocks. Each such branch will be guarded with an extractelement from the
; vector compare plus a test under mask instruction. This cost is modelled on
; the extractelement of i1.
define void @fun(i32* %arr, i64 %trip.count) {
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %arr, i64 %indvars.iv
%l = load i32, i32* %arrayidx, align 4
%cmp55 = icmp sgt i32 %l, 0
br i1 %cmp55, label %if.then, label %for.inc
if.then:
%sub = sub nsw i32 0, %l
store i32 %sub, i32* %arrayidx, align 4
br label %for.inc
for.inc:
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, %trip.count
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
ret void
; CHECK: LV: Found an estimated cost of 7 for VF 2 For instruction: br i1 %cmp55, label %if.then, label %for.inc
; CHECK: LV: Found an estimated cost of 0 for VF 2 For instruction: br label %for.inc
; CHECK: LV: Found an estimated cost of 1 for VF 2 For instruction: br i1 %exitcond, label %for.end.loopexit, label %for.body
}