preserve_mostcc.ll
1.17 KB
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; RUN: llc < %s -mtriple=arm64-apple-ios-8.0.0 | FileCheck %s
declare void @standard_cc_func()
declare preserve_mostcc void @preserve_mostcc_func()
; Registers r9-r15 should be saved before the call of a function
; with a standard calling convention.
define preserve_mostcc void @preserve_mostcc1() nounwind {
entry:
;CHECK-LABEL: preserve_mostcc1
;CHECK-NOT: stp
;CHECK-NOT: str
;CHECK: str x15
;CHECK-NEXT: stp x14, x13,
;CHECK-NEXT: stp x12, x11,
;CHECK-NEXT: stp x10, x9,
;CHECK: bl _standard_cc_func
call void @standard_cc_func()
;CHECK: ldp x10, x9,
;CHECK-NEXT: ldp x12, x11,
;CHECK-NEXT: ldp x14, x13,
;CHECK-NEXT: ldr x15
ret void
}
; Registers r9-r15 don't need to be saved if one
; function with preserve_mostcc calling convention calls another
; function with preserve_mostcc calling convention, because the
; callee wil save these registers anyways.
define preserve_mostcc void @preserve_mostcc2() nounwind {
entry:
;CHECK-LABEL: preserve_mostcc2
;CHECK-NOT: x14
;CHECK: stp x29, x30,
;CHECK-NOT: x14
;CHECK: bl _preserve_mostcc_func
call preserve_mostcc void @preserve_mostcc_func()
ret void
}