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|
# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z15 -O3 -run-pass=machine-sink %s -o - \
# RUN: -verify-machineinstrs | FileCheck %s
#
# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z15 -O3 -passes=machine-sink %s -o - \
# RUN: -verify-machineinstrs | FileCheck %s
#
# Test that the AGHIK can be sunk into %bb.4. It has a def of CC, but it is dead.
--- |
define void @fun() { ret void }
...
# CHECK-LABEL: bb.4:
# CHECK: %1:gr64bit = nsw AGHIK %0, -4, implicit-def dead $cc
# CHECK-NEXT: CGHI %1, 0, implicit-def $cc
# CHECK-NEXT: BRC 14, 6, %bb.1, implicit $cc
# CHECK-NEXT: J %bb.5
---
name: fun
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr64bit }
- { id: 1, class: gr64bit }
- { id: 2, class: grx32bit }
- { id: 3, class: gr64bit }
frameInfo:
maxAlignment: 1
machineFunctionInfo: {}
body: |
bb.0:
%2:grx32bit = LHIMux 0
%3:gr64bit = IMPLICIT_DEF
bb.1:
%0:gr64bit = PHI %3, %bb.0, %1, %bb.4
bb.2:
%1:gr64bit = nsw AGHIK %0, -4, implicit-def dead $cc
CHIMux %2, 0, implicit-def $cc
BRC 14, 6, %bb.4, implicit $cc
J %bb.3
bb.3:
bb.4:
CGHI %1, 0, implicit-def $cc
BRC 14, 6, %bb.1, implicit $cc
J %bb.5
bb.5:
Return
...
|
