File: varargs_new.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (33 lines) | stat: -rw-r--r-- 1,078 bytes parent folder | download | duplicates (12) 
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
27
28
29
30
31
32
33
 
; RUN: llvm-as < %s | llvm-dis > %t1.ll
; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
; RUN: diff %t1.ll %t2.ll

; Demonstrate all of the variable argument handling intrinsic functions plus 
; the va_arg instruction.

declare void @llvm.va_start(ptr)

declare void @llvm.va_copy(ptr, ptr)

declare void @llvm.va_end(ptr)

define i32 @test(i32 %X, ...) {
        ; Allocate two va_list items.  On this target, va_list is of type sbyte*
        %ap = alloca ptr                ; <ptr> [#uses=4]
        %aq = alloca ptr                ; <ptr> [#uses=2]

        ; Initialize variable argument processing
        call void @llvm.va_start( ptr %ap )

        ; Read a single integer argument
        %tmp = va_arg ptr %ap, i32             ; <i32> [#uses=1]

        ; Demonstrate usage of llvm.va_copy and llvm_va_end
        %apv = load ptr, ptr %ap            ; <ptr> [#uses=1]
        call void @llvm.va_copy( ptr %aq, ptr %apv )
        call void @llvm.va_end( ptr %aq )

        ; Stop processing of arguments.
        call void @llvm.va_end( ptr %ap )
        ret i32 %tmp
}