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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
; RUN: opt < %s -passes=inline -S | FileCheck %s
; RUN: opt < %s -passes='cgscc(inline)' -S | FileCheck %s
@a = global i32 4
@_ZTIi = external global ptr
; CHECK-LABEL: callSimpleFunction
; CHECK: call i32 @simpleFunction
define i32 @callSimpleFunction(i32 %idx, i32 %limit) {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then:
%s = call i32 @simpleFunction(i32 %idx)
store i32 %s, ptr @a
unreachable
if.end:
ret i32 %idx
}
; CHECK-LABEL: callSmallFunction
; CHECK-NOT: call i32 @smallFunction
define i32 @callSmallFunction(i32 %idx, i32 %limit) {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then:
%s = call i32 @smallFunction(i32 %idx)
store i32 %s, ptr @a
unreachable
if.end:
ret i32 %idx
}
; CHECK-LABEL: throwSimpleException
; CHECK: invoke i32 @simpleFunction
define i32 @throwSimpleException(i32 %idx, i32 %limit) #0 personality ptr @__gxx_personality_v0 {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
%exception = call ptr @__cxa_allocate_exception(i64 1) #0
invoke i32 @simpleFunction(i32 %idx)
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %if.then
call void @__cxa_throw(ptr %exception, ptr @_ZTIi, ptr null) #1
unreachable
lpad: ; preds = %if.then
%ll = landingpad { ptr, i32 }
cleanup
ret i32 %idx
if.end: ; preds = %entry
ret i32 %idx
}
; CHECK-LABEL: throwSmallException
; CHECK-NOT: invoke i32 @smallFunction
define i32 @throwSmallException(i32 %idx, i32 %limit) #0 personality ptr @__gxx_personality_v0 {
entry:
%cmp = icmp sge i32 %idx, %limit
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
%exception = call ptr @__cxa_allocate_exception(i64 1) #0
invoke i32 @smallFunction(i32 %idx)
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %if.then
call void @__cxa_throw(ptr %exception, ptr @_ZTIi, ptr null) #1
unreachable
lpad: ; preds = %if.then
%ll = landingpad { ptr, i32 }
cleanup
ret i32 %idx
if.end: ; preds = %entry
ret i32 %idx
}
define i32 @simpleFunction(i32 %a) #0 {
entry:
%a1 = load volatile i32, ptr @a
%x1 = add i32 %a1, %a1
%a2 = load volatile i32, ptr @a
%x2 = add i32 %x1, %a2
%a3 = load volatile i32, ptr @a
%x3 = add i32 %x2, %a3
%a4 = load volatile i32, ptr @a
%x4 = add i32 %x3, %a4
%a5 = load volatile i32, ptr @a
%x5 = add i32 %x4, %a5
%a6 = load volatile i32, ptr @a
%x6 = add i32 %x5, %a6
%a7 = load volatile i32, ptr @a
%x7 = add i32 %x6, %a6
%a8 = load volatile i32, ptr @a
%x8 = add i32 %x7, %a8
%a9 = load volatile i32, ptr @a
%x9 = add i32 %x8, %a9
%a10 = load volatile i32, ptr @a
%x10 = add i32 %x9, %a10
%a11 = load volatile i32, ptr @a
%x11 = add i32 %x10, %a11
%a12 = load volatile i32, ptr @a
%x12 = add i32 %x11, %a12
%add = add i32 %x12, %a
ret i32 %add
}
define i32 @smallFunction(i32 %a) {
entry:
%r = load volatile i32, ptr @a
ret i32 %r
}
attributes #0 = { nounwind }
attributes #1 = { noreturn }
declare ptr @__cxa_allocate_exception(i64)
declare i32 @__gxx_personality_v0(...)
declare void @__cxa_throw(ptr, ptr, ptr)
|
