File: stack-probes.ll

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llvm-toolchain-11 1%3A11.0.1-2
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; 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([40096 x i8]*)

; 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([40096 x i8]* %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

}