1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s 2 ; RUN: llc < %s -mtriple=x86_64-linux-gnueabi | FileCheck %s 3 ; RUN: opt < %s -O3 -S -mtriple=x86_64-linux-gnueabi | FileCheck %s --check-prefix=OPT 4 5 define i64 @get_stack() nounwind { 6 entry: 7 ; CHECK-LABEL: get_stack: 8 ; CHECK: movq %rsp, %rax 9 %sp = call i64 @llvm.read_register.i64(metadata !0) 10 ; OPT: @llvm.read_register.i64 11 ret i64 %sp 12 } 13 14 define void @set_stack(i64 %val) nounwind { 15 entry: 16 ; CHECK-LABEL: set_stack: 17 ; CHECK: movq %rdi, %rsp 18 call void @llvm.write_register.i64(metadata !0, i64 %val) 19 ; OPT: @llvm.write_register.i64 20 ret void 21 } 22 23 declare i64 @llvm.read_register.i64(metadata) nounwind 24 declare void @llvm.write_register.i64(metadata, i64) nounwind 25 26 ; register unsigned long current_stack_pointer asm("rsp"); 27 ; CHECK-NOT: .asciz "rsp" 28 !0 = metadata !{metadata !"rsp\00"} 29
