File: live-interval-analysis.mir

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llvm-toolchain-19 1%3A19.1.7-3
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# RUN: llc -o /dev/null %s -mtriple=aarch64-darwin-ios -run-pass=liveintervals -debug-only=regalloc -precompute-phys-liveness 2>&1 | FileCheck %s
# RUN: llc -o /dev/null %s -mtriple=aarch64-darwin-ios --passes='print<live-intervals>' -debug-only=regalloc -precompute-phys-liveness 2>&1 | FileCheck %s
# REQUIRES: asserts
--- |
  define void @reserved_reg_liveness() { ret void }
...
---
# CHECK-LABEL: ********** INTERVALS **********
# W29 is reserved, so we should only see dead defs
# CHECK-DAG: W29 [32r,32d:{{[0-9]+}})[64r,64d:{{[0-9]+}})
# For normal registers like x28 we should see the full intervals
# CHECK-DAG: W28 [0B,16r:{{[0-9]+}})[32r,48r:{{[0-9]+}})[48r,48d:{{[0-9]+}})
# CHECK: # End machine code for function reserved_reg_liveness.
name: reserved_reg_liveness
tracksRegLiveness: true
body: |
  bb.0:
    liveins: $x28
    %6 : xseqpairsclass = COPY $x28_fp
    $x28_fp = COPY %6
    $x28 = COPY $x28
    $fp = COPY $fp
...