llvm/test/CodeGen/X86/statepoint-gctransition-call-lowering.ll

; RUN: llc -verify-machineinstrs < %s | FileCheck %s
; This file contains a collection of basic tests to ensure we didn't
; screw up normal call lowering when a statepoint is a GC transition.

target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

declare zeroext i1 @return_i1()
declare zeroext i32 @return_i32()
declare zeroext i32 @return_i32_with_args(i32, ptr)
declare ptr @return_i32ptr()
declare float @return_float()
declare void @varargf(i32, ...)

define i1 @test_i1_return() gc "statepoint-example" {
; CHECK-LABEL: test_i1_return
; This is just checking that a i1 gets lowered normally when there's no extra
; state arguments to the statepoint
; CHECK: pushq %rax
; CHECK: callq return_i1
; CHECK: popq %rcx
; CHECK: retq
entry:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(i1 ()) @return_i1, i32 0, i32 1, i32 0, i32 0)
  %call1 = call zeroext i1 @llvm.experimental.gc.result.i1(token %safepoint_token)
  ret i1 %call1
}

define i32 @test_i32_return() gc "statepoint-example" {
; CHECK-LABEL: test_i32_return
; CHECK: pushq %rax
; CHECK: callq return_i32
; CHECK: popq %rcx
; CHECK: retq
entry:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(i32 ()) @return_i32, i32 0, i32 1, i32 0, i32 0)
  %call1 = call zeroext i32 @llvm.experimental.gc.result.i32(token %safepoint_token)
  ret i32 %call1
}

define ptr @test_i32ptr_return() gc "statepoint-example" {
; CHECK-LABEL: test_i32ptr_return
; CHECK: pushq %rax
; CHECK: callq return_i32ptr
; CHECK: popq %rcx
; CHECK: retq
entry:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(ptr ()) @return_i32ptr, i32 0, i32 1, i32 0, i32 0)
  %call1 = call ptr @llvm.experimental.gc.result.p0(token %safepoint_token)
  ret ptr %call1
}

define float @test_float_return() gc "statepoint-example" {
; CHECK-LABEL: test_float_return
; CHECK: pushq %rax
; CHECK: callq return_float
; CHECK: popq %rax
; CHECK: retq
entry:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(float ()) @return_float, i32 0, i32 1, i32 0, i32 0)
  %call1 = call float @llvm.experimental.gc.result.f32(token %safepoint_token)
  ret float %call1
}

define i1 @test_relocate(ptr addrspace(1) %a) gc "statepoint-example" {
; CHECK-LABEL: test_relocate
; Check that an ununsed relocate has no code-generation impact
; CHECK: pushq %rax
; CHECK: callq return_i1
; CHECK-NEXT: .Ltmp4:
; CHECK-NEXT: popq %rcx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
entry:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(i1 ()) @return_i1, i32 0, i32 1, i32 0, i32 0) ["gc-live" (ptr addrspace(1) %a)]
  %call1 = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token, i32 0, i32 0)
  %call2 = call zeroext i1 @llvm.experimental.gc.result.i1(token %safepoint_token)
  ret i1 %call2
}

define void @test_void_vararg() gc "statepoint-example" {
; CHECK-LABEL: test_void_vararg
; Check a statepoint wrapping a *ptr returning vararg function works
; CHECK: callq varargf
entry:
  %safepoint_token = tail call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void (i32, ...)) @varargf, i32 2, i32 1, i32 42, i32 43, i32 0, i32 0)
  ;; if we try to use the result from a statepoint wrapping a
  ;; non-void-returning varargf, we will experience a crash.
  ret void
}

define i32 @test_transition_args() gc "statepoint-example" {
; CHECK-LABEL: test_transition_args
; CHECK: pushq %rax
; CHECK: callq return_i32
; CHECK: popq %rcx
; CHECK: retq
entry:
  %val = alloca i32
  %safepoint_token = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(i32 ()) @return_i32, i32 0, i32 1, i32 0, i32 0) ["gc-transition" (ptr %val, i64 42)]
  %call1 = call i32 @llvm.experimental.gc.result.i32(token %safepoint_token)
  ret i32 %call1
}

define i32 @test_transition_args_2() gc "statepoint-example" {
; CHECK-LABEL: test_transition_args_2
; CHECK: pushq %rax
; CHECK: callq return_i32
; CHECK: popq %rcx
; CHECK: retq
entry:
  %val = alloca i32
  %arg = alloca i8
  %safepoint_token = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(i32 (i32, ptr)) @return_i32_with_args, i32 2, i32 1, i32 0, ptr %arg, i32 0, i32 0) ["gc-transition" (ptr %val, i64 42)]
  %call1 = call i32 @llvm.experimental.gc.result.i32(token %safepoint_token)
  ret i32 %call1
}

declare token @llvm.experimental.gc.statepoint.p0(i64, i32, ptr, i32, i32, ...)
declare i1 @llvm.experimental.gc.result.i1(token)

declare i32 @llvm.experimental.gc.result.i32(token)

declare ptr @llvm.experimental.gc.result.p0(token)

declare float @llvm.experimental.gc.result.f32(token)


declare ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token, i32, i32)