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f108c7f59d
Expanding on D109750. Since `DBG_VALUE` instructions have final register validity determined in `LDVImpl::handleDebugValue`, there is no apparent reason to immediately prune unused register operands as their defs are erased. Consequently, this renders `MachineInstr::eraseFromParentAndMarkDBGValuesForRemoval` moot; gaining a substantial performance improvement. The only necessary changes involve making relevant passes consider invalid DBG_VALUE vregs uses as valid. Reviewed By: MatzeB Differential Revision: https://reviews.llvm.org/D112852
41 lines
958 B
YAML
41 lines
958 B
YAML
# RUN: not --crash llc -verify-machineinstrs -run-pass none -o /dev/null %s 2>&1 | FileCheck %s
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# REQUIRES: aarch64-registered-target
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--- |
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64--"
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define void @selected_notrack() { ret void }
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define void @selected_track() { ret void }
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...
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---
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name: selected_notrack
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regBankSelected: true
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selected: true
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tracksDebugUserValues: false
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registers:
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- { id: 0, class: _ }
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body: |
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bb.0:
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; CHECK-NOT: function: selected_notrack
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DBG_VALUE %0, $noreg, $noreg, $noreg, $noreg
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...
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---
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name: selected_track
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regBankSelected: true
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selected: true
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tracksDebugUserValues: true
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registers:
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- { id: 0, class: _ }
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body: |
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bb.0:
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; CHECK: *** Bad machine code: Generic virtual register invalid in a Selected function ***
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; CHECK: function: selected_track
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; CHECK: instruction: DBG_VALUE %0:_
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; CHECK: operand 0: %0
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DBG_VALUE %0, $noreg, $noreg, $noreg, $noreg
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...
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