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1# RUN: llc -mtriple=x86_64-- %s -o - -run-pass=processimpdefs -run-pass=unreachable-mbb-elimination | FileCheck %s2# RUN: llc -mtriple=x86_64-- %s -o - -passes=process-imp-defs,unreachable-mbb-elimination | FileCheck %s3---4name: f5tracksRegLiveness: true6registers:7 - { id: 0, class: gr32, preferred-register: '' }8 - { id: 1, class: gr32, preferred-register: '' }9 - { id: 2, class: gr32, preferred-register: '' }10body: |11 bb.0:12 %0 = IMPLICIT_DEF13 JMP_1 %bb.114 15 bb.1:16 %1 = PHI %0, %bb.0, %2, %bb.217 %2 = ADD32ri8 killed %1, 1, implicit-def $eflags18 JMP_1 %bb.319 20 bb.2:21 JMP_1 %bb.122 23 bb.3:24...25 26# bb2 above is dead and should be removed and the PHI should be replaced with a27# COPY from an undef value since the bb0 value in the PHI is undef.28 29# CHECK: bb.0:30# CHECK: successors: %bb.131# CHECK: JMP_1 %bb.132 33# CHECK: bb.1:34# CHECK: successors: %bb.235# CHECK: [[TMP1:%[0-9]+]]:gr32 = COPY undef %{{[0-9]+}}36# CHECK: %{{[0-9]+}}:gr32 = ADD32ri8 killed [[TMP1]], 137# CHECK: JMP_1 %bb.238 39# CHECK: bb.2:40