forked from OSchip/llvm-project
85 lines
2.3 KiB
YAML
85 lines
2.3 KiB
YAML
# RUN: llc -o - -mtriple=thumbv7--windows-gnu -run-pass=greedy -run-pass=virtregrewriter %s | FileCheck %s
|
|
--- |
|
|
target datalayout = "e-m:w-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
|
|
target triple = "thumbv7--windows-gnu"
|
|
|
|
define void @subregLiveThrough() { ret void }
|
|
define void @subregNotLiveThrough() { ret void }
|
|
define void @subregNotLiveThrough2() { ret void }
|
|
|
|
...
|
|
---
|
|
# Check that we properly recognize that r1 is live through
|
|
# the first subreg copy.
|
|
# That will materialize as an implicit use of the big register
|
|
# on that copy.
|
|
# PR34107.
|
|
#
|
|
# CHECK-LABEL: name: subregLiveThrough
|
|
name: subregLiveThrough
|
|
tracksRegLiveness: true
|
|
registers:
|
|
- { id: 0, class: gprpair }
|
|
body: |
|
|
bb.0:
|
|
liveins: %r0, %r1
|
|
|
|
; That copy is being coalesced so we should use a KILL
|
|
; placeholder. If that's not a kill that means we probably
|
|
; not coalescing %0 and %r0_r1 and thus we are not testing
|
|
; the problematic code anymore.
|
|
;
|
|
; CHECK: %r0 = KILL %r0, implicit killed %r0_r1, implicit-def %r0_r1
|
|
; CHECK-NEXT: %r1 = KILL %r1, implicit killed %r0_r1
|
|
undef %0.gsub_0 = COPY %r0
|
|
%0.gsub_1 = COPY %r1
|
|
tBX_RET 14, %noreg, implicit %0
|
|
|
|
|
|
...
|
|
|
|
---
|
|
# Check that we properly recognize that r1 is *not* live through
|
|
# the first subreg copy.
|
|
# CHECK-LABEL: name: subregNotLiveThrough
|
|
name: subregNotLiveThrough
|
|
tracksRegLiveness: true
|
|
registers:
|
|
- { id: 0, class: gprpair }
|
|
body: |
|
|
bb.0:
|
|
liveins: %r0, %r1
|
|
|
|
; r1 is not live through so check we are not implicitly using
|
|
; the big register.
|
|
; CHECK: %r0 = KILL %r0, implicit-def %r0_r1
|
|
; CHECK-NEXT: tBX_RET
|
|
undef %0.gsub_0 = COPY %r0
|
|
tBX_RET 14, %noreg, implicit %0
|
|
|
|
|
|
...
|
|
|
|
---
|
|
# Check that we properly recognize that r1 is *not* live through
|
|
# the first subreg copy. It is defined by this copy, but is not
|
|
# through.
|
|
# CHECK-LABEL: name: subregNotLiveThrough2
|
|
name: subregNotLiveThrough2
|
|
tracksRegLiveness: true
|
|
registers:
|
|
- { id: 0, class: gprpair }
|
|
body: |
|
|
bb.0:
|
|
liveins: %r0, %r1
|
|
|
|
; r1 is not live through so check we are not implicitly using
|
|
; the big register.
|
|
; CHECK: %r0 = KILL %r0, implicit-def %r1, implicit-def %r0_r1
|
|
; CHECK-NEXT: tBX_RET
|
|
undef %0.gsub_0 = COPY %r0, implicit-def %r1
|
|
tBX_RET 14, %noreg, implicit %0
|
|
|
|
|
|
...
|