File: stackpointer.ll

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (28 lines) | stat: -rw-r--r-- 834 bytes parent folder | download | duplicates (33) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
; 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"}