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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; This testcase comes from this C fragment:
;
; void test(unsigned Num, int *Array) {
; unsigned i, j, k;
;
; for (i = 0; i != Num; ++i)
; for (j = 0; j != Num; ++j)
; for (k = 0; k != Num; ++k)
; printf("%d\n", i+k+j); /* Reassociate to (i+j)+k */
;}
;
; In this case, we want to reassociate the specified expr so that i+j can be
; hoisted out of the inner most loop.
;
; RUN: opt < %s -reassociate -S | FileCheck %s
; END.
@.LC0 = internal global [4 x i8] c"%d\0A\00" ; <[4 x i8]*> [#uses=1]
declare i32 @printf(i8*, ...)
; Check that (i+j) has been reassociated (i=reg115, j=reg116)
define void @test(i32 %Num, i32* %Array) {
; CHECK-LABEL: @test(
; CHECK-NEXT: bb0:
; CHECK-NEXT: [[COND221:%.*]] = icmp eq i32 0, [[NUM:%.*]]
; CHECK-NEXT: br i1 [[COND221]], label [[BB7:%.*]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[REG115:%.*]] = phi i32 [ [[REG120:%.*]], [[BB6:%.*]] ], [ 0, [[BB0:%.*]] ]
; CHECK-NEXT: br i1 [[COND221]], label [[BB6]], label [[BB3:%.*]]
; CHECK: bb3:
; CHECK-NEXT: [[REG116:%.*]] = phi i32 [ [[REG119:%.*]], [[BB5:%.*]] ], [ 0, [[BB2]] ]
; CHECK-NEXT: br i1 [[COND221]], label [[BB5]], label [[BB4:%.*]]
; CHECK: bb4:
; CHECK-NEXT: [[REG117:%.*]] = phi i32 [ [[REG118:%.*]], [[BB4]] ], [ 0, [[BB3]] ]
; CHECK-NEXT: [[REG113:%.*]] = add i32 [[REG116]], [[REG115]]
; CHECK-NEXT: [[REG114:%.*]] = add i32 [[REG113]], [[REG117]]
; CHECK-NEXT: [[CAST227:%.*]] = getelementptr [4 x i8], [4 x i8]* @.LC0, i64 0, i64 0
; CHECK-NEXT: [[TMP0:%.*]] = call i32 (i8*, ...) @printf(i8* [[CAST227]], i32 [[REG114]])
; CHECK-NEXT: [[REG118]] = add i32 [[REG117]], 1
; CHECK-NEXT: [[COND224:%.*]] = icmp ne i32 [[REG118]], [[NUM]]
; CHECK-NEXT: br i1 [[COND224]], label [[BB4]], label [[BB5]]
; CHECK: bb5:
; CHECK-NEXT: [[REG119]] = add i32 [[REG116]], 1
; CHECK-NEXT: [[COND225:%.*]] = icmp ne i32 [[REG119]], [[NUM]]
; CHECK-NEXT: br i1 [[COND225]], label [[BB3]], label [[BB6]]
; CHECK: bb6:
; CHECK-NEXT: [[REG120]] = add i32 [[REG115]], 1
; CHECK-NEXT: [[COND226:%.*]] = icmp ne i32 [[REG120]], [[NUM]]
; CHECK-NEXT: br i1 [[COND226]], label [[BB2]], label [[BB7]]
; CHECK: bb7:
; CHECK-NEXT: ret void
;
bb0:
%cond221 = icmp eq i32 0, %Num ; <i1> [#uses=3]
br i1 %cond221, label %bb7, label %bb2
bb2: ; preds = %bb6, %bb0
%reg115 = phi i32 [ %reg120, %bb6 ], [ 0, %bb0 ] ; <i32> [#uses=2]
br i1 %cond221, label %bb6, label %bb3
bb3: ; preds = %bb5, %bb2
%reg116 = phi i32 [ %reg119, %bb5 ], [ 0, %bb2 ] ; <i32> [#uses=2]
br i1 %cond221, label %bb5, label %bb4
bb4: ; preds = %bb4, %bb3
%reg117 = phi i32 [ %reg118, %bb4 ], [ 0, %bb3 ] ; <i32> [#uses=2]
%reg113 = add i32 %reg115, %reg117 ; <i32> [#uses=1]
%reg114 = add i32 %reg113, %reg116 ; <i32> [#uses=1]
%cast227 = getelementptr [4 x i8], [4 x i8]* @.LC0, i64 0, i64 0 ; <i8*> [#uses=1]
call i32 (i8*, ...) @printf( i8* %cast227, i32 %reg114 ) ; <i32>:0 [#uses=0]
%reg118 = add i32 %reg117, 1 ; <i32> [#uses=2]
%cond224 = icmp ne i32 %reg118, %Num ; <i1> [#uses=1]
br i1 %cond224, label %bb4, label %bb5
bb5: ; preds = %bb4, %bb3
%reg119 = add i32 %reg116, 1 ; <i32> [#uses=2]
%cond225 = icmp ne i32 %reg119, %Num ; <i1> [#uses=1]
br i1 %cond225, label %bb3, label %bb6
bb6: ; preds = %bb5, %bb2
%reg120 = add i32 %reg115, 1 ; <i32> [#uses=2]
%cond226 = icmp ne i32 %reg120, %Num ; <i1> [#uses=1]
br i1 %cond226, label %bb2, label %bb7
bb7: ; preds = %bb6, %bb0
ret void
}
|