1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2# RUN: llc -mtriple=x86_64-unknown-linux-gnu -verify-machineinstrs -O2 -run-pass=livevars,phi-node-elimination -o - %s | FileCheck %s
3
4# Check that the COPY from [[MOV64rm]] is not killed, because there is a
5# subsequent use of [[MOV64rm]] in the INLINEASM_BR instruction which should be
6# killed instead.
7--- |
8  ; ModuleID = '<stdin>'
9  source_filename = "<stdin>"
10  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
11  target triple = "x86_64-unknown-linux-gnu"
12
13  declare void @foo(i8*)
14
15  ; Function Attrs: nounwind
16  define void @test1(i8* %arg, i8** %mem) #0 {
17  entry:
18    br label %loop
19
20  loop:                                             ; preds = %loop, %entry
21    %a = phi i8* [ %arg, %entry ], [ %b, %loop ]
22    %b = load i8*, i8** %mem, align 8
23    call void @foo(i8* %a)
24    callbr void asm sideeffect "", "*m,!i"(i8* elementtype(i8) %b)
25            to label %end [label %loop]
26
27  end:                                              ; preds = %loop
28    ret void
29  }
30
31  attributes #0 = { nounwind }
32
33...
34---
35name:            test1
36alignment:       16
37tracksRegLiveness: true
38registers:
39  - { id: 0, class: gr64 }
40  - { id: 1, class: gr64 }
41  - { id: 2, class: gr64 }
42  - { id: 3, class: gr64 }
43liveins:
44  - { reg: '$rdi', virtual-reg: '%2' }
45  - { reg: '$rsi', virtual-reg: '%3' }
46frameInfo:
47  maxAlignment:    1
48  hasCalls:        true
49machineFunctionInfo: {}
50body:             |
51  ; CHECK-LABEL: name: test1
52  ; CHECK: bb.0.entry:
53  ; CHECK-NEXT:   successors: %bb.1(0x80000000)
54  ; CHECK-NEXT:   liveins: $rdi, $rsi
55  ; CHECK-NEXT: {{  $}}
56  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:gr64 = COPY killed $rsi
57  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:gr64 = COPY killed $rdi
58  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:gr64 = COPY killed [[COPY1]]
59  ; CHECK-NEXT: {{  $}}
60  ; CHECK-NEXT: bb.1.loop (address-taken, inlineasm-br-indirect-target):
61  ; CHECK-NEXT:   successors: %bb.2(0x80000000), %bb.1(0x00000000)
62  ; CHECK-NEXT: {{  $}}
63  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:gr64 = COPY killed [[COPY2]]
64  ; CHECK-NEXT:   [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm [[COPY]], 1, $noreg, 0, $noreg :: (load (s64) from %ir.mem)
65  ; CHECK-NEXT:   ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
66  ; CHECK-NEXT:   $rdi = COPY killed [[COPY3]]
67  ; CHECK-NEXT:   CALL64pcrel32 target-flags(x86-plt) @foo, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit-def $rsp, implicit-def $ssp
68  ; CHECK-NEXT:   ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
69  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:gr64 = COPY [[MOV64rm]]
70  ; CHECK-NEXT:   INLINEASM_BR &"", 9 /* sideeffect mayload attdialect */, 196654 /* mem:m */, killed [[MOV64rm]], 1, $noreg, 0, $noreg, 13 /* imm */, blockaddress(@test1, %ir-block.loop)
71  ; CHECK-NEXT:   JMP_1 %bb.2
72  ; CHECK-NEXT: {{  $}}
73  ; CHECK-NEXT: bb.2.end:
74  ; CHECK-NEXT:   RET 0
75  bb.0.entry:
76    liveins: $rdi, $rsi
77
78    %3:gr64 = COPY killed $rsi
79    %2:gr64 = COPY killed $rdi
80
81  bb.1.loop (address-taken, inlineasm-br-indirect-target):
82    successors: %bb.2(0x80000000), %bb.1(0x00000000)
83
84    %0:gr64 = PHI %2, %bb.0, %1, %bb.1
85    %1:gr64 = MOV64rm %3, 1, $noreg, 0, $noreg :: (load (s64) from %ir.mem)
86    ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
87    $rdi = COPY killed %0
88    CALL64pcrel32 target-flags(x86-plt) @foo, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit-def $rsp, implicit-def $ssp
89    ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
90    INLINEASM_BR &"", 9 /* sideeffect mayload attdialect */, 196654 /* mem:m */, %1, 1, $noreg, 0, $noreg, 13 /* imm */, blockaddress(@test1, %ir-block.loop)
91    JMP_1 %bb.2
92
93  bb.2.end:
94    RET 0
95
96...
97