File: stack-probe-red-zone.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (21 lines) | stat: -rw-r--r-- 611 bytes parent folder | download | duplicates (28) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
; 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
}