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
|
// REQUIRES: x86-registered-target
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -O0 -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -triple i386-pc-linux-gnu -O0 -emit-llvm %s -o - | FileCheck %s
int test1(int cond) {
// CHECK-LABEL: define i32 @test1(
// CHECK: callbr void asm sideeffect
// CHECK: to label %asm.fallthrough [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough:
asm volatile goto("testl %0, %0; jne %l1;" :: "r"(cond)::label_true, loop);
asm volatile goto("testl %0, %0; jne %l2;" :: "r"(cond)::label_true, loop);
// CHECK: callbr void asm sideeffect
// CHECK: to label %asm.fallthrough1 [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough1:
return 0;
loop:
return 0;
label_true:
return 1;
}
int test2(int cond) {
// CHECK-LABEL: define i32 @test2(
// CHECK: callbr i32 asm sideeffect
// CHECK: to label %asm.fallthrough [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough:
asm volatile goto("testl %0, %0; jne %l2;" : "=r"(cond) : "r"(cond) :: label_true, loop);
asm volatile goto("testl %0, %0; jne %l3;" : "=r"(cond) : "r"(cond) :: label_true, loop);
// CHECK: callbr i32 asm sideeffect
// CHECK: to label %asm.fallthrough1 [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough1:
return 0;
loop:
return 0;
label_true:
return 1;
}
int test3(int out1, int out2) {
// CHECK-LABEL: define i32 @test3(
// CHECK: callbr { i32, i32 } asm sideeffect
// CHECK: to label %asm.fallthrough [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough:
asm volatile goto("testl %0, %0; jne %l3;" : "=r"(out1), "=r"(out2) : "r"(out1) :: label_true, loop);
asm volatile goto("testl %0, %0; jne %l4;" : "=r"(out1), "=r"(out2) : "r"(out1) :: label_true, loop);
// CHECK: callbr { i32, i32 } asm sideeffect
// CHECK: to label %asm.fallthrough2 [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough2:
return 0;
loop:
return 0;
label_true:
return 1;
}
int test4(int out1, int out2) {
// CHECK-LABEL: define i32 @test4(
// CHECK: callbr { i32, i32 } asm sideeffect "jne ${3:l}", "={si},={di},r,X,X,0,1
// CHECK: to label %asm.fallthrough [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough:
if (out1 < out2)
asm volatile goto("jne %l3" : "+S"(out1), "+D"(out2) : "r"(out1) :: label_true, loop);
else
asm volatile goto("jne %l5" : "+S"(out1), "+D"(out2) : "r"(out1), "r"(out2) :: label_true, loop);
// CHECK: callbr { i32, i32 } asm sideeffect "jne ${5:l}", "={si},={di},r,r,X,X,0,1
// CHECK: to label %asm.fallthrough2 [label %label_true, label %loop]
// CHECK-LABEL: asm.fallthrough2:
return out1 + out2;
loop:
return -1;
label_true:
return -2;
}
int test5(int addr, int size, int limit) {
// CHECK-LABEL: define i32 @test5(
// CHECK: callbr i32 asm "add $1,$0 ; jc ${3:l} ; cmp $2,$0 ; ja ${3:l} ; ", "=r,imr,imr,X,0
// CHECK: to label %asm.fallthrough [label %t_err]
// CHECK-LABEL: asm.fallthrough:
asm goto(
"add %1,%0 ; "
"jc %l[t_err] ; "
"cmp %2,%0 ; "
"ja %l[t_err] ; "
: "+r" (addr)
: "g" (size), "g" (limit)
: : t_err);
return 0;
t_err:
return 1;
}
int test6(int out1) {
// CHECK-LABEL: define i32 @test6(
// CHECK: callbr i32 asm sideeffect "testl $0, $0; testl $1, $1; jne ${2:l}", "={si},r,X,X,0,{{.*}} i8* blockaddress(@test6, %label_true), i8* blockaddress(@test6, %landing)
// CHECK: to label %asm.fallthrough [label %label_true, label %landing]
// CHECK-LABEL: asm.fallthrough:
// CHECK-LABEL: landing:
int out2 = 42;
asm volatile goto("testl %0, %0; testl %1, %1; jne %l2" : "+S"(out2) : "r"(out1) :: label_true, landing);
landing:
return out1 + out2;
label_true:
return -2;
}
|
