1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2# RUN: llc -run-pass early-machinelicm -mtriple=powerpc64le-unknown-linux-gnu \
3# RUN:   -verify-machineinstrs %s -o - | FileCheck %s
4---
5name: deadFlagAfterCSE
6# This case tests that after the dead %3 is CSE-ed with hoisted %5 in MachineLICM
7# pass, the dead flag will be cleared for %3 if %5 has users.
8tracksRegLiveness: true
9body: |
10  ; CHECK-LABEL: name: deadFlagAfterCSE
11  ; CHECK: bb.0:
12  ; CHECK:   successors: %bb.1(0x80000000)
13  ; CHECK:   liveins: $x3, $x4
14  ; CHECK:   [[COPY:%[0-9]+]]:g8rc = COPY $x3
15  ; CHECK:   [[COPY1:%[0-9]+]]:g8rc = COPY $x4
16  ; CHECK:   [[ADD8_:%[0-9]+]]:g8rc_and_g8rc_nox0 = ADD8 [[COPY]], [[COPY1]]
17  ; CHECK:   [[ADDI8_:%[0-9]+]]:g8rc_and_g8rc_nox0 = ADDI8 [[ADD8_]], 100
18  ; CHECK:   B %bb.1
19  ; CHECK: bb.1:
20  ; CHECK:   successors: %bb.1(0x80000000)
21  ; CHECK:   [[PHI:%[0-9]+]]:g8rc_and_g8rc_nox0 = PHI [[ADD8_]], %bb.0, %5, %bb.1
22  ; CHECK:   STDX [[PHI]], [[ADDI8_]], [[ADD8_]]
23  ; CHECK:   [[ADDI8_1:%[0-9]+]]:g8rc = nuw ADDI8 [[PHI]], 1
24  ; CHECK:   B %bb.1
25  ; CHECK: bb.2:
26  ; CHECK:   BLR8 implicit $lr8, implicit $rm
27  bb.0:
28    liveins: $x3, $x4
29    %0:g8rc = COPY $x3
30    %1:g8rc = COPY $x4
31    %2:g8rc_and_g8rc_nox0 = ADD8 %0, %1
32    dead %3:g8rc_and_g8rc_nox0 = ADDI8 %2, 100
33    B %bb.1
34
35  bb.1:
36    %4:g8rc_and_g8rc_nox0 = PHI %2, %bb.0, %6, %bb.1
37    %5:g8rc_and_g8rc_nox0 = ADDI8 %2, 100
38    STDX %4, %5, %2
39    %6:g8rc = nuw ADDI8 %4, 1
40    B %bb.1
41
42  bb.2:
43    BLR8 implicit $lr8, implicit $rm
44...
45---
46name: deadFlagAfterCSE2
47# This case tests that after the dead %3 is CSE-ed with hoisted dead %5 in
48# MachineLICM pass, the dead flag will be kept.
49tracksRegLiveness: true
50body: |
51  ; CHECK-LABEL: name: deadFlagAfterCSE2
52  ; CHECK: bb.0:
53  ; CHECK:   successors: %bb.1(0x80000000)
54  ; CHECK:   liveins: $x3, $x4
55  ; CHECK:   [[COPY:%[0-9]+]]:g8rc = COPY $x3
56  ; CHECK:   [[COPY1:%[0-9]+]]:g8rc = COPY $x4
57  ; CHECK:   [[ADD8_:%[0-9]+]]:g8rc_and_g8rc_nox0 = ADD8 [[COPY]], [[COPY1]]
58  ; CHECK:   dead %3:g8rc_and_g8rc_nox0 = ADDI8 [[ADD8_]], 100
59  ; CHECK:   B %bb.1
60  ; CHECK: bb.1:
61  ; CHECK:   successors: %bb.1(0x80000000)
62  ; CHECK:   [[PHI:%[0-9]+]]:g8rc_and_g8rc_nox0 = PHI [[ADD8_]], %bb.0, %5, %bb.1
63  ; CHECK:   [[ADDI8_:%[0-9]+]]:g8rc = nuw ADDI8 [[PHI]], 1
64  ; CHECK:   B %bb.1
65  ; CHECK: bb.2:
66  ; CHECK:   BLR8 implicit $lr8, implicit $rm
67  bb.0:
68    liveins: $x3, $x4
69    %0:g8rc = COPY $x3
70    %1:g8rc = COPY $x4
71    %2:g8rc_and_g8rc_nox0 = ADD8 %0, %1
72    dead %3:g8rc_and_g8rc_nox0 = ADDI8 %2, 100
73    B %bb.1
74
75  bb.1:
76    %4:g8rc_and_g8rc_nox0 = PHI %2, %bb.0, %6, %bb.1
77    dead %5:g8rc_and_g8rc_nox0 = ADDI8 %2, 100
78    %6:g8rc = nuw ADDI8 %4, 1
79    B %bb.1
80
81  bb.2:
82    BLR8 implicit $lr8, implicit $rm
83...
84
85