File: stack-probes.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (29 lines) | stat: -rw-r--r-- 1,083 bytes parent folder | download | duplicates (13) 
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
29
 
; RUN: llc -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck --check-prefix=X86-LINUX %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck --check-prefix=X64-LINUX %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -code-model=large < %s -o - | FileCheck --check-prefix=X64-LINUX-LARGE %s

declare void @use(ptr)

; Ensure calls to __probestack occur for large stack frames
define void @test() "probe-stack"="__probestack" {
  %array = alloca [40096 x i8], align 16
  call void @use(ptr %array)
  ret void

; X86-LINUX-LABEL:       test:
; X86-LINUX:             movl $40124, %eax # imm = 0x9CBC
; X86-LINUX-NEXT:        calll __probestack
; X86-LINUX-NEXT:        subl %eax, %esp

; X64-LINUX-LABEL:       test:
; X64-LINUX:             movl $40104, %eax # imm = 0x9CA8
; X64-LINUX-NEXT:        callq __probestack
; X64-LINUX-NEXT:        subq %rax, %rsp

; X64-LINUX-LARGE-LABEL: test:
; X64-LINUX-LARGE:       movl $40104, %eax # imm = 0x9CA8
; X64-LINUX-LARGE-NEXT:  movabsq $__probestack, %r11
; X64-LINUX-LARGE-NEXT:  callq *%r11
; X64-LINUX-LARGE-NEXT:  subq %rax, %rsp

}