forked from OSchip/llvm-project
23 lines
631 B
LLVM
23 lines
631 B
LLVM
|
; RUN: llc -mtriple armv7a--none-eabi < %s | FileCheck %s
|
||
|
|
; RUN: llc -mtriple armv7a--none-eabi < %s -enable-ipra | FileCheck %s
|
||
|
|
|
||
|
|
; Other targets disable callee-saved registers for internal functions when
|
||
|
|
; using IPRA, but that isn't profitable for ARM because the PUSH/POP
|
||
|
|
; instructions can more efficiently save registers than using individual
|
||
|
|
; LDR/STRs in the caller.
|
||
|
|
|
||
|
|
define internal void @callee() norecurse {
|
||
|
|
; CHECK-LABEL: callee:
|
||
|
|
entry:
|
||
|
|
; CHECK: push {r4, lr}
|
||
|
|
; CHECK: pop {r4, pc}
|
||
|
|
tail call void asm sideeffect "", "~{r4}"()
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @caller() {
|
||
|
|
entry:
|
||
|
|
call void @callee()
|
||
|
|
ret void
|
||
|
|
}
|