41 lines
1.6 KiB
Plaintext
41 lines
1.6 KiB
Plaintext
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# RUN: not --crash llc -mtriple=aarch64-- -run-pass=legalizer %s -o - 2>&1 | FileCheck %s
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# This is to demonstrate what kind of bugs we're missing w/o some kind
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# of validation for LegalizerInfo: G_INTTOPTR could only be legal /
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# could be legalized if its destination operand has a pointer type and
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# its source - a scalar type of an appropriate size. This test meets
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# the requirements for type index 0 (the pointer) and LLT-size
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# requirements for type index 1 (64 bits for AArch64), but has a
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# non-scalar (vector) type for type index 1. The Legalizer is expected
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# to fail on it with an appropriate error message. Prior to
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# LegalizerInfo::verify AArch64 legalizer had a subtle bug in its
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# definition that caused it to accept the following MIR as legal.
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# Namely, it checked that type index 0 is either s64 or p0 and
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# implicitly declared any type for type index 1 as legal (as soon as
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# its size is 64 bits). As LegalizerInfo::verify asserts on such a
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# definition due to type index 1 not being covered by a specific
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# action (not just `unsupportedIf`) it forces to review the definition
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# and fix the mistake: check that type index 0 is p0 and type index 1
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# is s64.
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# CHECK: Bad machine code: operand types must be all-vector or all-scalar
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# CHECK: LLVM ERROR: Found 1 machine code errors.
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---
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name: broken
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alignment: 4
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tracksRegLiveness: true
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registers:
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- { id: 0, class: _ }
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- { id: 1, class: _ }
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body: |
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bb.1:
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liveins: $d0
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%0:_(<4 x s16>) = COPY $d0
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%1:_(p0) = G_INTTOPTR %0(<4 x s16>)
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$x0 = COPY %1(p0)
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RET_ReallyLR implicit $x0
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...
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