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| # RUN: llc -run-pass=livevars,twoaddressinstruction -mtriple=x86_64-- -o - %s | FileCheck %s
---
name: foo
tracksRegLiveness: true
body: |
bb.0:
liveins: $edi
%0:gr32 = COPY killed $edi
%1:gr32 = COPY killed %0
%4:gr32 = XOR32ri8 %1, 1, implicit-def dead $eflags
DBG_VALUE %4
%5:gr32 = COPY %4
PUSH32r killed %1, implicit-def $esp, implicit $esp
$eax = COPY killed %5
RETQ implicit killed $eax
...
# Verify that the DBG_VALUE instruction does not inhibit
# TwoAddressInstructionPass::rescheduleMIBelowKill optimization
# CHECK: PUSH32r %1, implicit-def $esp, implicit $esp
# CHECK-NEXT: %2:gr32 = COPY killed %1
# CHECK-NEXT: %2:gr32 = XOR32ri8 %2, 1, implicit-def dead $eflags
# CHECK-NEXT: DBG_VALUE %2
# CHECK-NEXT: %3:gr32 = COPY killed %2
|