| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -O0 -mtriple=aarch64-apple-ios -global-isel -start-before=legalizer -stop-after=instruction-select %s -o - | FileCheck %s |
| |
| # We run the legalizer to combine the trivial EXTRACT_SEQ pair, leaving %1 and |
| # %2 orphaned after instruction-selection (no instructions define or use |
| # them). This shouldn't be a problem. |
| |
| --- | |
| target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" |
| |
| define void @unused_reg() { ret void } |
| |
| --- |
| name: unused_reg |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| |
| |
| body: | |
| bb.0: |
| liveins: $w0 |
| ; CHECK-LABEL: name: unused_reg |
| ; CHECK: liveins: $w0 |
| ; CHECK: [[COPY:%[0-9]+]]:gpr32all = COPY $w0 |
| ; CHECK: $w0 = COPY [[COPY]] |
| %0:gpr(s32) = COPY $w0 |
| %1:gpr(s64) = G_MERGE_VALUES %0(s32), %0(s32) |
| %2:gpr(s32), %3:gpr(s32) = G_UNMERGE_VALUES %1(s64) |
| $w0 = COPY %2(s32) |
| ... |
