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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -tailcallopt | FileCheck %s
; RUN: llc -verify-machineinstrs < %s -mtriple=arm64-none-linux-gnu -tailcallopt | FileCheck %s --check-prefix=CHECK-ARM64
; This test is designed to be run in the situation where the
; call-frame is not reserved (hence disable-fp-elim), but where
; callee-pop can occur (hence tailcallopt).
declare fastcc void @will_pop([8 x i32], i32 %val)
define fastcc void @foo(i32 %in) {
; CHECK-LABEL: foo:
%addr = alloca i8, i32 %in
; Normal frame setup stuff:
; CHECK: sub sp, sp,
; CHECK: stp x29, x30
; CHECK-ARM64: stp x29, x30, [sp, #-16]!
; CHECK-ARM64: mov x29, sp
; Reserve space for call-frame:
; CHECK: sub sp, sp, #16
; CHECK-ARM64: sub sp, sp, #16
call fastcc void @will_pop([8 x i32] undef, i32 42)
; CHECK: bl will_pop
; CHECK-ARM64: bl will_pop
; Since @will_pop is fastcc with tailcallopt, it will put the stack
; back where it needs to be, we shouldn't duplicate that
; CHECK-NOT: sub sp, sp, #16
; CHECK-NOT: add sp, sp,
; CHECK-ARM64-NOT: sub sp, sp, #16
; CHECK-ARM64-NOT: add sp, sp,
; CHECK: ldp x29, x30
; CHECK: add sp, sp,
; CHECK-ARM64: mov sp, x29
; CHECK-ARM64: ldp x29, x30, [sp], #16
ret void
}
declare void @wont_pop([8 x i32], i32 %val)
define void @foo1(i32 %in) {
; CHECK-LABEL: foo1:
%addr = alloca i8, i32 %in
; Normal frame setup again
; CHECK: sub sp, sp,
; CHECK: stp x29, x30
; CHECK-ARM64: stp x29, x30, [sp, #-16]!
; CHECK-ARM64: mov x29, sp
; Reserve space for call-frame
; CHECK: sub sp, sp, #16
; CHECK-ARM64: sub sp, sp, #16
call void @wont_pop([8 x i32] undef, i32 42)
; CHECK: bl wont_pop
; CHECK-ARM64: bl wont_pop
; This time we *do* need to unreserve the call-frame
; CHECK: add sp, sp, #16
; CHECK-ARM64: add sp, sp, #16
; Check for epilogue (primarily to make sure sp spotted above wasn't
; part of it).
; CHECK: ldp x29, x30
; CHECK: add sp, sp,
; CHECK-ARM64: mov sp, x29
; CHECK-ARM64: ldp x29, x30, [sp], #16
ret void
}
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