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]] 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 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 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 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 = metadata !{metadata !"sp"} 48
