1# RUN: llc -march=amdgcn -run-pass liveintervals -verify-machineinstrs -o /dev/null -debug-only=regalloc %s 2>&1 | FileCheck %s 2# REQUIRES: asserts 3# We currently maintain a main liveness range which operates like a superset of 4# all subregister liveranges. We may need to create additional SSA values at 5# merge point in this main liverange even though none of the subregister 6# liveranges needed it. 7# 8# Should see three distinct value numbers: 9# CHECK: %vreg0 [{{.*}}:0)[{{.*}}:1)[{{.*}}:2) 0@{{[0-9]+[Berd]}} 1@{{[0-9]+[Berd]}} 2@{{[0-9]+B-phi}} 10--- | 11 define void @test0() { ret void } 12... 13--- 14name: test0 15registers: 16 - { id: 0, class: sreg_64 } 17body: | 18 bb.0: 19 successors: %bb.1, %bb.2 20 S_NOP 0, implicit-def undef %0:sub0 21 S_CBRANCH_VCCNZ %bb.1, implicit undef %vcc 22 S_BRANCH %bb.2 23 24 bb.1: 25 successors: %bb.2 26 S_NOP 0, implicit-def %0:sub1 27 S_NOP 0, implicit %0:sub1 28 S_BRANCH %bb.2 29 30 bb.2: 31 S_NOP 0, implicit %0:sub0 32... 33