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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=loop-fusion < %s | FileCheck %s
define void @hoist_preheader(i32 %N) {
; CHECK-LABEL: define void @hoist_preheader(
; CHECK-SAME: i32 [[N:%.*]]) {
; CHECK-NEXT: [[PRE1:.*]]:
; CHECK-NEXT: [[HOISTME:%.*]] = add i32 1, [[N]]
; CHECK-NEXT: [[HOISTME2:%.*]] = add i32 1, [[HOISTME]]
; 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: [[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: 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
br i1 %cond, label %body1, label %pre2
pre2:
%hoistme = add i32 1, %N
%hoistme2 = add i32 1, %hoistme
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
}
|
