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; 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"}
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