File: stack-clash-unknown-call.ll

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llvm-toolchain-11 1%3A11.0.1-2~deb10u1
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; RUN: llc < %s | FileCheck %s


target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg);

define void @foo() local_unnamed_addr #0 {

;CHECK-LABEL: foo:
;CHECK:         # %bb.0:
;CHECK-NEXT:	subq	$4096, %rsp # imm = 0x1000
; it's important that we don't use the call as a probe here
;CHECK-NEXT:	movq	$0, (%rsp)
;CHECK-NEXT:	subq	$3912, %rsp # imm = 0xF48
;CHECK-NEXT:	.cfi_def_cfa_offset 8016
;CHECK-NEXT:	movq	%rsp, %rdi
;CHECK-NEXT:	movl	$8000, %edx # imm = 0x1F40
;CHECK-NEXT:	xorl	%esi, %esi
;CHECK-NEXT:	callq	memset
;CHECK-NEXT:	addq	$8008, %rsp # imm = 0x1F48
;CHECK-NEXT:	.cfi_def_cfa_offset 8
;CHECK-NEXT:	retq

  %a = alloca i8, i64 8000, align 16
  call void @llvm.memset.p0i8.i64(i8* align 16 %a, i8 0, i64 8000, i1 false)
  ret void
}

attributes #0 =  {"probe-stack"="inline-asm"}