test/CodeGen/X86/statepoint-fixup-copy-prop-neg.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -o - %s -run-pass fixup-statepoint-caller-saved -verify-machineinstrs | FileCheck %s

# Check that COPY is not eliminated if dest register is used in
# non-meta arguments of statepoint.

--- |
  ; ModuleID = 'cp.ll'
  source_filename = "cp.ll"
  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
  target triple = "x86_64-pc-linux-gnu"

  declare void @foo(i64)

  define i8 addrspace(1)* @test(i64 %a, i64 %b, i64 %c, i8 addrspace(1)* %p) gc "statepoint-example" {
  entry:
    %token = call token (i64, i32, void (i64)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidi64f(i64 0, i32 0, void (i64)* @foo, i32 1, i32 0, i64 %b, i3 0, i32 0) [ "deopt"(i64 %b), "gc-live"(i8 addrspace(1)* %p) ]
    %p2 = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %token, i32 0, i32 0) ; (%p, %p)
    ret i8 addrspace(1)* %p2
  }

  ; Function Attrs: nounwind readonly
  declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32 immarg, i32 immarg) #0

  declare token @llvm.experimental.gc.statepoint.p0f_isVoidi64f(i64 immarg, i32 immarg, void (i64)*, i32 immarg, i32 immarg, ...)

  attributes #0 = { nounwind readonly }

...
---
name:            test
alignment:       16
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:
  - { reg: '$rsi', virtual-reg: '' }
  - { reg: '$rcx', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    8
  adjustsStack:    false
  hasCalls:        true
  stackProtector:  ''
  maxCallFrameSize: 4294967295
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:
  - { id: 0, name: '', type: default, offset: 0, size: 8, alignment: 8,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites:       []
constants:       []
machineFunctionInfo: {}
body:             |
  bb.0.entry:
    liveins: $rcx, $rsi

    ; CHECK-LABEL: name: test
    ; CHECK: liveins: $rcx, $rsi
    ; CHECK: renamable $rdi = COPY $rsi
    ; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $rcx :: (store 8 into %stack.0)
    ; CHECK: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
    ; CHECK: MOV64mr %stack.1, 1, $noreg, 0, $noreg, $rdi :: (store 8 into %stack.1)
    ; CHECK: STATEPOINT 0, 0, 1, @foo, $rdi, 2, 0, 2, 0, 2, 1, 1, 8, %stack.1, 0, 2, 1, 1, 8, %stack.0, 0, 2, 0, 2, 1, 0, 0, csr_64, implicit-def $rsp, implicit-def $ssp :: (volatile load store 8 on %stack.0), (load 8 from %stack.1)
    ; CHECK: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
    ; CHECK: renamable $rax = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
    ; CHECK: RET 0, $rax
    renamable $rdi = COPY $rsi
    MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $rcx :: (store 8 into %stack.0)
    ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
    STATEPOINT 0, 0, 1, @foo, $rdi, 2, 0, 2, 0, 2, 1, killed renamable $rdi, 2, 1, 1, 8, %stack.0, 0, 2, 0, 2, 1, 0, 0, csr_64, implicit-def $rsp, implicit-def $ssp :: (volatile load store 8 on %stack.0)
    ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
    renamable $rax = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
    RET 0, $rax

...