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