1# RUN: llc -mtriple=aarch64-unknown-unknown -o - -global-isel -verify-machineinstrs -run-pass=instruction-select %s | FileCheck %s
2--- |
3  ; ModuleID = '/tmp/test.ll'
4  source_filename = "/tmp/test.ll"
5  target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
6  target triple = "aarch64-unknown-unknown"
7
8  define i32 @test_phi(i32 %argc) {
9  entry:
10    %cmp = icmp ugt i32 %argc, 0
11    br i1 %cmp, label %case1, label %case2
12
13  case1:                                            ; preds = %entry
14    %tmp1 = add i32 %argc, 1
15    br label %return
16
17  case2:                                            ; preds = %entry
18    %tmp2 = add i32 %argc, 2
19    br label %return
20
21  return:                                           ; preds = %case2, %case1
22    %res = phi i32 [ %tmp1, %case1 ], [ %tmp2, %case2 ]
23    ret i32 %res
24  }
25
26...
27---
28name:            test_phi
29alignment:       2
30exposesReturnsTwice: false
31legalized:       true
32regBankSelected: true
33selected:        false
34tracksRegLiveness: true
35registers:
36  - { id: 0, class: gpr, preferred-register: '' }
37  - { id: 1, class: gpr, preferred-register: '' }
38  - { id: 2, class: gpr, preferred-register: '' }
39  - { id: 3, class: gpr, preferred-register: '' }
40  - { id: 4, class: gpr, preferred-register: '' }
41  - { id: 5, class: gpr, preferred-register: '' }
42  - { id: 6, class: gpr, preferred-register: '' }
43  - { id: 7, class: gpr, preferred-register: '' }
44  - { id: 8, class: gpr, preferred-register: '' }
45liveins:
46body:             |
47  bb.1.entry:
48    successors: %bb.2.case1(0x40000000), %bb.3.case2(0x40000000)
49    liveins: %w0
50    ; CHECK-LABEL: name: test_phi
51    ; CHECK: [[RES:%.*]] = PHI
52
53    %0(s32) = COPY %w0
54    %1(s32) = G_CONSTANT i32 0
55    %3(s32) = G_CONSTANT i32 1
56    %5(s32) = G_CONSTANT i32 2
57    %8(s32) = G_ICMP intpred(ugt), %0(s32), %1
58    %2(s1) = G_TRUNC %8(s32)
59    G_BRCOND %2(s1), %bb.2.case1
60    G_BR %bb.3.case2
61
62  bb.2.case1:
63    successors: %bb.4.return(0x80000000)
64
65    %4(s32) = G_ADD %0, %3
66    G_BR %bb.4.return
67
68  bb.3.case2:
69    successors: %bb.4.return(0x80000000)
70
71    %6(s32) = G_ADD %0, %5
72
73  bb.4.return:
74    %7(s32) = G_PHI %4(s32), %bb.2.case1, %6(s32), %bb.3.case2
75    %w0 = COPY %7(s32)
76    RET_ReallyLR implicit %w0
77
78...
79