stack-clash-dynamic-alloca.ll
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; RUN: llc -mtriple=x86_64-linux-android < %s | FileCheck -check-prefix=CHECK-X86-64 %s
; RUN: llc -mtriple=i686-linux-android < %s | FileCheck -check-prefix=CHECK-X86-32 %s
define i32 @foo(i32 %n) local_unnamed_addr #0 {
%a = alloca i32, i32 %n, align 16
%b = getelementptr inbounds i32, i32* %a, i64 1198
store volatile i32 1, i32* %b
%c = load volatile i32, i32* %a
ret i32 %c
}
attributes #0 = {"probe-stack"="inline-asm"}
; CHECK-X86-64-LABEL: foo:
; CHECK-X86-64: # %bb.0:
; CHECK-X86-64-NEXT: pushq %rbp
; CHECK-X86-64-NEXT: .cfi_def_cfa_offset 16
; CHECK-X86-64-NEXT: .cfi_offset %rbp, -16
; CHECK-X86-64-NEXT: movq %rsp, %rbp
; CHECK-X86-64-NEXT: .cfi_def_cfa_register %rbp
; CHECK-X86-64-NEXT: movq %rsp, %rax
; CHECK-X86-64-NEXT: movl %edi, %ecx
; CHECK-X86-64-NEXT: leaq 15(,%rcx,4), %rcx
; CHECK-X86-64-NEXT: andq $-16, %rcx
; CHECK-X86-64-NEXT: subq %rcx, %rax
; CHECK-X86-64-NEXT: cmpq %rsp, %rax
; CHECK-X86-64-NEXT: jge .LBB0_3
; CHECK-X86-64-NEXT: .LBB0_2: # =>This Inner Loop Header: Depth=1
; CHECK-X86-64-NEXT: xorq $0, (%rsp)
; CHECK-X86-64-NEXT: subq $4096, %rsp # imm = 0x1000
; CHECK-X86-64-NEXT: cmpq %rsp, %rax
; CHECK-X86-64-NEXT: jl .LBB0_2
; CHECK-X86-64-NEXT: .LBB0_3:
; CHECK-X86-64-NEXT: movq %rax, %rsp
; CHECK-X86-64-NEXT: movl $1, 4792(%rax)
; CHECK-X86-64-NEXT: movl (%rax), %eax
; CHECK-X86-64-NEXT: movq %rbp, %rsp
; CHECK-X86-64-NEXT: popq %rbp
; CHECK-X86-64-NEXT: .cfi_def_cfa %rsp, 8
; CHECK-X86-64-NEXT: retq
; CHECK-X86-32-LABEL: foo:
; CHECK-X86-32: # %bb.0:
; CHECK-X86-32-NEXT: pushl %ebp
; CHECK-X86-32-NEXT: .cfi_def_cfa_offset 8
; CHECK-X86-32-NEXT: .cfi_offset %ebp, -8
; CHECK-X86-32-NEXT: movl %esp, %ebp
; CHECK-X86-32-NEXT: .cfi_def_cfa_register %ebp
; CHECK-X86-32-NEXT: subl $8, %esp
; CHECK-X86-32-NEXT: movl 8(%ebp), %ecx
; CHECK-X86-32-NEXT: movl %esp, %eax
; CHECK-X86-32-NEXT: leal 15(,%ecx,4), %ecx
; CHECK-X86-32-NEXT: andl $-16, %ecx
; CHECK-X86-32-NEXT: subl %ecx, %eax
; CHECK-X86-32-NEXT: cmpl %esp, %eax
; CHECK-X86-32-NEXT: jge .LBB0_3
; CHECK-X86-32-NEXT: .LBB0_2: # =>This Inner Loop Header: Depth=1
; CHECK-X86-32-NEXT: xorl $0, (%esp)
; CHECK-X86-32-NEXT: subl $4096, %esp # imm = 0x1000
; CHECK-X86-32-NEXT: cmpl %esp, %eax
; CHECK-X86-32-NEXT: jl .LBB0_2
; CHECK-X86-32-NEXT: .LBB0_3:
; CHECK-X86-32-NEXT: movl %eax, %esp
; CHECK-X86-32-NEXT: movl $1, 4792(%eax)
; CHECK-X86-32-NEXT: movl (%eax), %eax
; CHECK-X86-32-NEXT: movl %ebp, %esp
; CHECK-X86-32-NEXT: popl %ebp
; CHECK-X86-32-NEXT: .cfi_def_cfa %esp, 4
; CHECK-X86-32-NEXT: retl