44e8a205f4
For below case, virtual register is defined twice in the self loop. We don't need to spill %0 after the third instruction `%0 = def (tied %0)`, because it is defined in the second instruction `%0 = def`. 1 bb.1 2 %0 = def 3 %0 = def (tied %0) 4 ... 5 jmp bb.1 Reviewed By: MatzeB Differential Revision: https://reviews.llvm.org/D125079
32 lines
860 B
YAML
32 lines
860 B
YAML
# RUN: llc -mtriple=x86_64-- -run-pass=regallocfast -o - %s | FileCheck %s
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...
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---
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name: foo
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alignment: 16
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tracksRegLiveness: true
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registers:
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- { id: 0, class: vr128 }
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frameInfo:
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maxAlignment: 16
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stack:
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- { id: 0, size: 64, alignment: 16 }
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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; CHECK: renamable $xmm1 = V_SET0
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; CHECK-NEXT: renamable $xmm0 = V_SET0
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; CHECK-NEXT: renamable $xmm1 = PXORrr renamable $xmm1, renamable $xmm0
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; CHECK-NEXT: MOVAPSmr %stack.0, 1, $noreg, 0, $noreg, killed renamable $xmm1
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; CHECK-NEXT: MOVAPSmr %stack.0, 1, $noreg, 16, $noreg, killed renamable $xmm0
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%0:vr128 = V_SET0
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%1:vr128 = V_SET0
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%0:vr128 = PXORrr %0, %1
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MOVAPSmr %stack.0, 1, $noreg, 0, $noreg, %0
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MOVAPSmr %stack.0, 1, $noreg, 16, $noreg, %1
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JMP_1 %bb.0.entry
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RET 0
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...
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