llvm-project

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#RUN: not --crash llc -mtriple=aarch64 -o - -run-pass=none -verify-machineinstrs %s 2>&1 | FileCheck %s
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# REQUIRES: aarch64-registered-target
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---
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name:            test_insert_subreg
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legalized:       true
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regBankSelected: false
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selected:        false
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tracksRegLiveness: true
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liveins:
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body:             |
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  bb.0:
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    liveins: $s0, $h1, $q2
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    %0:fpr32 = COPY $s0
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    ; FIXME: we can't diagnose this case because the ARM backend treats fp16
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    ; values as being ssub regs, creating a contradiction in the sizes.
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    ; CHECK-NOT: *** Bad machine code:
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    %1:fpr128 = IMPLICIT_DEF
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    %2:fpr128 = INSERT_SUBREG %1:fpr128, %0:fpr32, %subreg.hsub
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    ; CHECK: *** Bad machine code: INSERT_SUBREG expected inserted value to have equal or lesser size than the subreg it was inserted into ***
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    %3:fpr128 = IMPLICIT_DEF
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    %4:fpr128 = INSERT_SUBREG %3:fpr128, %0:fpr32, %subreg.dsub
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    ; CHECK-NOT: *** Bad machine code:
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    %7:fpr128 = IMPLICIT_DEF
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    %8:fpr128 = INSERT_SUBREG %7:fpr128, %0:fpr32, %subreg.ssub
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    ; CHECK-NOT: *** Bad machine code:
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    %9:fpr128 = COPY $q2
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    %10:fpr128 = IMPLICIT_DEF
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    %11:fpr128 = INSERT_SUBREG %10:fpr128, %9.ssub, %subreg.ssub
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...
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