File: stack-align.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (26 lines) | stat: -rw-r--r-- 1,046 bytes parent folder | download | duplicates (20) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
; RUN: llc -march=sparc < %s | FileCheck %s --check-prefixes=CHECK,CHECK32
; RUN: llc -march=sparcv9 < %s | FileCheck %s --check-prefixes=CHECK,CHECK64
declare void @stack_realign_helper(i32 %a, i32* %b)

;; This is a function where we have a local variable of 64-byte
;; alignment.  We want to see that the stack is aligned (the initial
;; andn), that the local var is accessed via stack pointer (to %o1), and that
;; the argument is accessed via frame pointer not stack pointer (to %o0).

;; CHECK-LABEL: stack_realign:
;; CHECK32:      andn %sp, 63, %sp
;; CHECK32-NEXT: ld [%fp+92], %o0
;; CHECK64:      add %sp, 2047, %g1
;; CHECK64-NEXT: andn %g1, 63, %g1
;; CHECK64-NEXT: add %g1, -2047, %sp
;; CHECK64-NEXT: ld [%fp+2227], %o0
;; CHECK-NEXT:   call stack_realign_helper
;; CHECK32-NEXT: add %sp, 128, %o1
;; CHECK64-NEXT: add %sp, 2239, %o1

define void @stack_realign(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g) {
entry:
  %aligned = alloca i32, align 64
  call void @stack_realign_helper(i32 %g, i32* %aligned)
  ret void
}