59 lines
1.5 KiB
LLVM
59 lines
1.5 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -tailcallopt | FileCheck %s
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; This test is designed to be run in the situation where the
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; call-frame is not reserved (hence disable-fp-elim), but where
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; callee-pop can occur (hence tailcallopt).
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declare fastcc void @will_pop([8 x i32], i32 %val)
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define fastcc void @foo(i32 %in) {
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; CHECK-LABEL: foo:
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%addr = alloca i8, i32 %in
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; Normal frame setup stuff:
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; CHECK: stp x29, x30, [sp, #-16]!
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; CHECK: mov x29, sp
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; Reserve space for call-frame:
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; CHECK: str w{{[0-9]+}}, [sp, #-16]!
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call fastcc void @will_pop([8 x i32] undef, i32 42)
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; CHECK: bl will_pop
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; Since @will_pop is fastcc with tailcallopt, it will put the stack
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; back where it needs to be, we shouldn't duplicate that
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; CHECK-NOT: sub sp, sp, #16
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; CHECK-NOT: add sp, sp,
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; CHECK: mov sp, x29
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; CHECK: ldp x29, x30, [sp], #16
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ret void
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}
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declare void @wont_pop([8 x i32], i32 %val)
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define void @foo1(i32 %in) {
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; CHECK-LABEL: foo1:
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%addr = alloca i8, i32 %in
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; Normal frame setup again
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; CHECK: stp x29, x30, [sp, #-16]!
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; CHECK: mov x29, sp
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; Reserve space for call-frame
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; CHECK: str w{{[0-9]+}}, [sp, #-16]!
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call void @wont_pop([8 x i32] undef, i32 42)
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; CHECK: bl wont_pop
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; This time we *do* need to unreserve the call-frame
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; CHECK: add sp, sp, #16
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; Check for epilogue (primarily to make sure sp spotted above wasn't
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; part of it).
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; CHECK: mov sp, x29
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; CHECK: ldp x29, x30, [sp], #16
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ret void
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}
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