derek.holloway
7502bf64a4
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72 lines
2.0 KiB
LLVM
72 lines
2.0 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -frame-pointer=all | FileCheck -check-prefix CHECK-WITHFP-ARM64 %s
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; Make sure a reasonably sane prologue and epilogue are
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; generated. This test is not robust in the face of an frame-handling
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; evolving, but still has value for unrelated changes, I
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; believe.
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;
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; In particular, it will fail when ldp/stp are used for frame setup,
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; when FP-elim is implemented, and when addressing from FP is
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; implemented.
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@var = global i64 0
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@local_addr = global ptr null
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declare void @foo()
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define void @trivial_func() nounwind {
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; CHECK-LABEL: trivial_func: // @trivial_func
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; CHECK-NEXT: // %bb.0
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; CHECK-NEXT: ret
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ret void
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}
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define void @trivial_fp_func() uwtable {
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; CHECK-LABEL: trivial_fp_func:
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; CHECK: str x30, [sp, #-16]!
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; CHECK-NOT: mov x29, sp
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; CHECK-WITHFP-ARM64-LABEL: trivial_fp_func:
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; CHECK-WITHFP-ARM64: stp x29, x30, [sp, #-16]!
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; CHECK-WITHFP-ARM64-NEXT: .cfi_def_cfa_offset 16
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; CHECK-WITHFP-ARM64-NEXT: mov x29, sp
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; CHECK-WITHFP-ARM64-NEXT: .cfi_def_cfa w29, 16
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; CHECK-WITHFP-ARM64-NEXT: .cfi_offset w30, -8
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; CHECK-WITHFP-ARM64-NEXT: .cfi_offset w29, -16
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; Dont't really care, but it would be a Bad Thing if this came after the epilogue.
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; CHECK-WITHFP-ARM64: bl foo
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; CHECK: bl foo
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call void @foo()
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ret void
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; CHECK: ldr x30, [sp], #16
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; CHECK-NEXT: .cfi_def_cfa_offset 0
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; CHECK-NEXT: .cfi_restore w30
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; CHECK-NEXT: ret
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; CHECK-WITHFP-ARM64: .cfi_def_cfa wsp, 16
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; CHECK-WITHFP-ARM64-NEXT: ldp x29, x30, [sp], #16
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; CHECK-WITHFP-ARM64-NEXT: .cfi_def_cfa_offset 0
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; CHECK-WITHFP-ARM64-NEXT: .cfi_restore w30
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; CHECK-WITHFP-ARM64-NEXT: .cfi_restore w29
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; CHECK-WITHFP-ARM64-NEXT: ret
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}
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define void @stack_local() {
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%local_var = alloca i64
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; CHECK-LABEL: stack_local:
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; CHECK: sub sp, sp, #16
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%val = load i64, ptr @var
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store i64 %val, ptr %local_var
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; CHECK-DAG: str {{x[0-9]+}}, [sp, #{{[0-9]+}}]
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store ptr %local_var, ptr @local_addr
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; CHECK-DAG: add {{x[0-9]+}}, sp, #{{[0-9]+}}
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ret void
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}
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