derek.holloway
7502bf64a4
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38 lines
1.4 KiB
YAML
38 lines
1.4 KiB
YAML
# 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. This is reversed in this test and the
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# legalizer is expected to fail on it with an appropriate error
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# message. Prior to LegalizerInfo::verify AArch64 legalizer had a
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# subtle bug in its definition that caused it to accept the following
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# MIR as legal. Namely, it checked that type index 0 is either s64 or
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# p0 (in that order) and implicitly declared any type for type index 1
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# as legal. As LegalizerInfo::verify asserts on such a definition due
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# to type index 1 not being covered 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 (in that order).
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# CHECK: Bad machine code: inttoptr result type must be a pointer
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# CHECK: Bad machine code: inttoptr source type must not be a pointer
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# CHECK: LLVM ERROR: Found 2 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: $x0
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%0:_(p0) = COPY $x0
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%1:_(s64) = G_INTTOPTR %0(p0)
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$x0 = COPY %1(s64)
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RET_ReallyLR implicit $x0
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...
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