1 // RUN: %clang_cc1 -triple x86_64-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
2 // RUN: %clang_cc1 -triple arm64-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
3 // RUN: %clang_cc1 -triple armv7-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
4
5 // CHECK-NOT: @sp = common global
6 register unsigned long current_stack_pointer asm("sp");
7 struct p4_Thread {
8 struct {
9 int len;
10 } word;
11 };
12 // Testing pointer types as well
13 register struct p4_Thread *p4TH asm("sp");
14
15 // CHECK: define{{.*}} i[[bits:[0-9]+]] @get_stack_pointer_addr()
16 // CHECK: [[ret:%[0-9]+]] = call i[[bits]] @llvm.read_register.i[[bits]](metadata !0)
17 // CHECK: ret i[[bits]] [[ret]]
get_stack_pointer_addr()18 unsigned long get_stack_pointer_addr() {
19 return current_stack_pointer;
20 }
21 // CHECK: declare{{.*}} i[[bits]] @llvm.read_register.i[[bits]](metadata)
22
23 // CHECK: define{{.*}} void @set_stack_pointer_addr(i[[bits]] %addr) #0 {
24 // CHECK: [[sto:%[0-9]+]] = load i[[bits]]* %
25 // CHECK: call void @llvm.write_register.i[[bits]](metadata !0, i[[bits]] [[sto]])
26 // CHECK: ret void
set_stack_pointer_addr(unsigned long addr)27 void set_stack_pointer_addr(unsigned long addr) {
28 current_stack_pointer = addr;
29 }
30 // CHECK: declare{{.*}} void @llvm.write_register.i[[bits]](metadata, i[[bits]])
31
32 // CHECK: define {{.*}}@fn1
fn1()33 int fn1() {
34 return (*p4TH).word.len;
35 }
36 // CHECK: %[[regr:[0-9]+]] = call i[[bits]] @llvm.read_register.i[[bits]](metadata !0)
37 // CHECK: inttoptr i[[bits]] %[[regr]] to %struct.p4_Thread*
38
39 // CHECK: define {{.*}}@fn2
fn2(struct p4_Thread * val)40 void fn2(struct p4_Thread *val) {
41 p4TH = val;
42 }
43 // CHECK: %[[regw:[0-9]+]] = ptrtoint %struct.p4_Thread* %{{.*}} to i[[bits]]
44 // CHECK: call void @llvm.write_register.i[[bits]](metadata !0, i[[bits]] %[[regw]])
45
46 // CHECK: !llvm.named.register.sp = !{!0}
47 // CHECK: !0 = !{!"sp"}
48