blob: fff44a07ca7d0d366987ee4d3b5e75bcb0090bac [file] [log] [blame]
; RUN: llc -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; Ensure that red zone usage occurs.
define signext i8 @testStackProbesOff() {
%array = alloca [40096 x i8], align 16
ret i8 0
; CHECK-LABEL: testStackProbesOff:
; CHECK: subq $39976, %rsp # imm = 0x9C28
}
; Ensure stack probes do not result in red zone usage.
define void @testStackProbesOn() "probe-stack"="__probestack" {
%array = alloca [40096 x i8], align 16
ret void
; CHECK-LABEL: testStackProbesOn:
; CHECK: movl $40104, %eax # imm = 0x9CA8
; CHECK-NEXT: callq __probestack
; CHECK-NEXT: subq %rax, %rsp
}