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
39
40
41
42
|
; Ensure we don't run analyses over loops after they've been deleted. We run
; one version with a no-op loop pass to make sure that the loop doesn't get
; simplified away.
;
; RUN: opt < %s -passes='require<iv-users>,no-op-loop,require<iv-users>' -S \
; RUN: | FileCheck %s --check-prefixes=CHECK,BEFORE
; RUN: opt < %s -passes='require<iv-users>,loop-deletion,require<iv-users>' -S \
; RUN: | FileCheck %s --check-prefixes=CHECK,AFTER
define void @foo(i64 %n, i64 %m) nounwind {
; CHECK-LABEL: @foo(
entry:
br label %bb
; CHECK: entry:
; BEFORE-NEXT: br label %bb
; AFTER-NEXT: br label %return
bb:
%x.0 = phi i64 [ 0, %entry ], [ %t0, %bb2 ]
%t0 = add i64 %x.0, 1
%t1 = icmp slt i64 %x.0, %n
br i1 %t1, label %bb2, label %return
; BEFORE: bb:
; BEFORE: br i1 {{.*}}, label %bb2, label %return
; AFTER-NOT: bb:
; AFTER-NOT: br
bb2:
%t2 = icmp slt i64 %x.0, %m
br i1 %t1, label %bb, label %return
; BEFORE: bb2:
; BEFORE: br i1 {{.*}}, label %bb, label %return
; AFTER-NOT: bb2:
; AFTER-NOT: br
return:
ret void
; CHECK: return:
; CHECK-NEXT: ret void
}
|
