You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
1.1 KiB
32 lines
1.1 KiB
4 months ago
|
; RUN: llc < %s -mtriple=arm-nacl-gnueabi | FileCheck %s
|
||
|
|
|
||
|
|
declare void @llvm.va_start(i8*)
|
||
|
|
declare void @external_func(i8*)
|
||
|
|
|
||
|
|
@va_list = external global i8*
|
||
|
|
|
||
|
|
; On ARM, varargs arguments are passed in r0-r3 with the rest on the
|
||
|
|
; stack. A varargs function must therefore spill rN-r3 just below the
|
||
|
|
; function's initial stack pointer.
|
||
|
|
;
|
||
|
|
; This test checks for a bug in which a gap was left between the spill
|
||
|
|
; area and varargs arguments on the stack when using 16 byte stack
|
||
|
|
; alignment.
|
||
|
|
|
||
|
|
define void @varargs_func(i32 %arg1, ...) {
|
||
|
|
call void @llvm.va_start(i8* bitcast (i8** @va_list to i8*))
|
||
|
|
call void @external_func(i8* bitcast (i8** @va_list to i8*))
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
; CHECK-LABEL: varargs_func:
|
||
|
|
; Reserve space for the varargs save area. This currently reserves
|
||
|
|
; more than enough (16 bytes rather than the 12 bytes needed).
|
||
|
|
; CHECK: sub sp, sp, #12
|
||
|
|
; CHECK: push {r11, lr}
|
||
|
|
; Align the stack pointer to a multiple of 16.
|
||
|
|
; CHECK: sub sp, sp, #12
|
||
|
|
; Calculate the address of the varargs save area and save varargs
|
||
|
|
; arguments into it.
|
||
|
|
; CHECK-NEXT: add r0, sp, #20
|
||
|
|
; CHECK-NEXT: stm r0, {r1, r2, r3}
|