File: arm64-big-stack.ll

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (20 lines) | stat: -rw-r--r-- 614 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
; RUN: llc < %s | FileCheck %s
target triple = "arm64-apple-macosx10"

; Check that big stacks are generated correctly.
; Currently, this is done by a sequence of sub instructions,
; which can encode immediate with a 12 bits mask an optionally
; shift left (up to 12). I.e., 16773120 is the biggest value.
; <rdar://12513931>
; CHECK-LABEL: foo:
; CHECK: sub sp, sp, #4095, lsl #12
; CHECK: sub sp, sp, #4095, lsl #12
; CHECK: sub sp, sp, #2, lsl #12
define void @foo() nounwind ssp {
entry:
  %buffer = alloca [33554432 x i8], align 1
  call void @doit(ptr %buffer) nounwind
  ret void
}

declare void @doit(ptr)