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# RUN: llc -mtriple=x86_64-- -run-pass=regallocfast -o - %s | FileCheck %s
# If the tied use is undef value, fastregalloc should free the def register.
# There is no reload needed for the undef value.
...
---
name: foo
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: vr128 }
frameInfo:
maxAlignment: 16
stack:
- { id: 0, size: 64, alignment: 16 }
- { id: 1, size: 16, alignment: 16 }
machineFunctionInfo: {}
body: |
bb.0.entry:
; CHECK-LABEL: bb.0.entry
; CHECK-NEXT: renamable $xmm0 = PXORrr undef renamable $xmm0, undef renamable $xmm0
; CHECK-NEXT: MOVAPSmr %stack.1, 1, $noreg, 0, $noreg, renamable $xmm0
; CHECK-NEXT: MOVAPSmr %stack.0, 1, $noreg, 0, $noreg, renamable $xmm0
; CHECK-NEXT: MOVAPSmr %stack.0, 1, $noreg, 16, $noreg, renamable $xmm0
; CHECK-NEXT: MOVAPSmr %stack.0, 1, $noreg, 32, $noreg, renamable $xmm0
; CHECK-NEXT: MOVAPSmr %stack.0, 1, $noreg, 48, $noreg, killed renamable $xmm0
%0:vr128 = PXORrr undef %0, undef %0
MOVAPSmr %stack.1, 1, $noreg, 0, $noreg, %0
MOVAPSmr %stack.0, 1, $noreg, 0, $noreg, %0
MOVAPSmr %stack.0, 1, $noreg, 16, $noreg, %0
MOVAPSmr %stack.0, 1, $noreg, 32, $noreg, %0
MOVAPSmr %stack.0, 1, $noreg, 48, $noreg, killed %0
RET 0
...
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