| ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s |
| ; RUN: llc < %s -mtriple=x86_64-linux-gnueabi | FileCheck %s |
| ; RUN: opt < %s -O3 -S -mtriple=x86_64-linux-gnueabi | FileCheck %s --check-prefix=OPT |
| |
| define i64 @get_stack() nounwind { |
| entry: |
| ; CHECK-LABEL: get_stack: |
| ; CHECK: movq %rsp, %rax |
| %sp = call i64 @llvm.read_register.i64(metadata !0) |
| ; OPT: @llvm.read_register.i64 |
| ret i64 %sp |
| } |
| |
| define void @set_stack(i64 %val) nounwind { |
| entry: |
| ; CHECK-LABEL: set_stack: |
| ; CHECK: movq %rdi, %rsp |
| call void @llvm.write_register.i64(metadata !0, i64 %val) |
| ; OPT: @llvm.write_register.i64 |
| ret void |
| } |
| |
| declare i64 @llvm.read_register.i64(metadata) nounwind |
| declare void @llvm.write_register.i64(metadata, i64) nounwind |
| |
| ; register unsigned long current_stack_pointer asm("rsp"); |
| ; CHECK-NOT: .asciz "rsp" |
| !0 = !{!"rsp\00"} |
