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
43
44
45
46
|
; RUN: opt -S -passes=loop-fusion < %s | FileCheck %s
define void @sink_preheader(i32 %N) {
; CHECK-LABEL: @sink_preheader(
; CHECK-NEXT: pre1:
; CHECK-NEXT: br label [[BODY1:%.*]]
; CHECK: body1:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[BODY1]] ], [ 0, [[PRE1:%.*]] ]
; CHECK-NEXT: [[I2:%.*]] = phi i32 [ [[I_NEXT2:%.*]], [[BODY1]] ], [ 0, [[PRE1]] ]
; CHECK-NEXT: [[I_NEXT]] = add i32 1, [[I]]
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[I]], [[N:%.*]]
; CHECK-NEXT: [[BARRIER:%.*]] = add i32 1, [[N]]
; CHECK-NEXT: [[I_NEXT2]] = add i32 1, [[I2]]
; CHECK-NEXT: [[COND2:%.*]] = icmp ne i32 [[I2]], [[N]]
; CHECK-NEXT: br i1 [[COND2]], label [[BODY1]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: [[SINKME:%.*]] = add i32 1, [[BARRIER]]
; CHECK-NEXT: [[SINKME2:%.*]] = add i32 1, [[BARRIER]]
; CHECK-NEXT: [[SINKME3:%.*]] = add i32 1, [[SINKME2]]
; CHECK-NEXT: ret void
;
pre1:
br label %body1
body1: ; preds = %pre1, %body1
%i = phi i32 [%i_next, %body1], [0, %pre1]
%i_next = add i32 1, %i
%cond = icmp ne i32 %i, %N
%barrier = add i32 1, %N
br i1 %cond, label %body1, label %pre2
pre2:
%sinkme = add i32 1, %barrier
%sinkme2 = add i32 1, %barrier
%sinkme3 = add i32 1, %sinkme2
br label %body2
body2: ; preds = %pre2, %body2
%i2 = phi i32 [%i_next2, %body2], [0, %pre2]
%i_next2 = add i32 1, %i2
%cond2 = icmp ne i32 %i2, %N
br i1 %cond2, label %body2, label %exit
exit:
ret void
}
|
