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
|
# RUN: llc -mtriple=powerpc64le--linux-gnu -start-before ppc-mi-peepholes %s -o - -verify-machineinstrs | FileCheck %s
# RUN: llc -mtriple=powerpc64le--linux-gnu -run-pass ppc-mi-peepholes %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=CHECK-PASS
# The differential revision https://reviews.llvm.org/D60402 was supposed to
# collapse RLDICL/RLDICR into RLDIC when possible, but it missed removing the
# RLDICL instruction. This test case tests the fix for the bug.
--- |
; ModuleID = 'jump-tables-collapse-rotate-remove-SrcMI.ll'
source_filename = "jump-tables-collapse-rotate-remove-SrcMI.ll"
target datalayout = "e-m:e-i64:64-n32:64"
define dso_local i64 @test(i64 %a, i64 %b) local_unnamed_addr {
entry:
%add = add nsw i64 %b, %a
ret i64 %add
}
...
---
name: test
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: g8rc }
- { id: 1, class: g8rc }
- { id: 2, class: g8rc }
liveins:
- { reg: '$x3', virtual-reg: '%0' }
- { reg: '$x4', virtual-reg: '%1' }
frameInfo:
maxAlignment: 1
machineFunctionInfo: {}
body: |
bb.0.entry:
liveins: $x3, $x4
%1:g8rc = COPY $x4
%0:g8rc = COPY $x3
%2:g8rc = RLDICL killed %1, 0, 32
%3:g8rc = RLDICR %2, 2, 61
$x3 = COPY %3
BLR8 implicit $lr8, implicit $rm, implicit $x3
...
# CHECK-LABEL: test:
# CHECK: # %bb.0: # %entry
# CHECK-NEXT: rldic 3, 4, 2, 30
# CHECK-NEXT: blr
#
# CHECK-PASS-NOT: %2:g8rc = RLDICL killed %1, 0, 32
# CHECK-PASS-NOT: %3:g8rc = RLDICR %2, 2, 61
# CHECK-PASS: %3:g8rc = RLDIC killed %1, 2, 30
|
