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034cc2f5d0
G_INSERT and G_EXTRACT are not sufficient to use to represent both
INSERT/EXTRACT on a subregister and INSERT/EXTRACT on a vector.
We would like to be able to INSERT/EXTRACT on vectors in cases that
INSERT/EXTRACT on vector subregisters are not sufficient, so we add
these opcodes.
I tried to do a patch where we treated G_EXTRACT as both
G_EXTRACT_SUBVECTOR and G_EXTRACT_SUBREG, but ran into an infinite loop
at this
[point](8b5b294ec2/llvm/lib/Target/RISCV/RISCVISelLowering.cpp (L9932))
in the SDAG equivalent code.
44 lines
1.5 KiB
YAML
44 lines
1.5 KiB
YAML
# RUN: not --crash llc -o - -run-pass=none -verify-machineinstrs %s 2>&1 | FileCheck %s
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---
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name: g_splat_vector
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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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%0:_(s32) = G_CONSTANT i32 0
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%1:_(<vscale x 2 x s32>) = G_IMPLICIT_DEF
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%2:_(<vscale x 1 x s32>) = G_IMPLICIT_DEF
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; CHECK: G_INSERT_SUBVECTOR first source must be a register
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%3:_(<vscale x 2 x s32>) = G_INSERT_SUBVECTOR 1, %2, 0
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; CHECK: G_INSERT_SUBVECTOR second source must be a register
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%4:_(<vscale x 2 x s32>) = G_INSERT_SUBVECTOR %1, 1, 0
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; CHECK: G_INSERT_SUBVECTOR index must be an immediate
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%5:_(<vscale x 2 x s32>) = G_INSERT_SUBVECTOR %1, %2, %0
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; CHECK: Destination type must be a vector
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%6:_(s32) = G_INSERT_SUBVECTOR %1, %2, 0
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; CHECK: First source must be a vector
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%7:_(<vscale x 2 x s32>) = G_INSERT_SUBVECTOR %0, %2, 0
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; CHECK: Second source must be a vector
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%8:_(<vscale x 2 x s32>) = G_INSERT_SUBVECTOR %1, %0, 0
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; CHECK: Destination type must match the first source vector type
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%9:_(<vscale x 2 x s32>) = G_INSERT_SUBVECTOR %2, %1, 0
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%10:_(<vscale x 1 x s16>) = G_IMPLICIT_DEF
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; CHECK: Element type of source vectors must be the same
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%11:_(<vscale x 2 x s32>) = G_INSERT_SUBVECTOR %1, %10, 0
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%12:_(<vscale x 4 x s32>) = G_IMPLICIT_DEF
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; CHECK: Index must be a multiple of the second source vector's minimum vector length
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%13:_(<vscale x 4 x s32>) = G_INSERT_SUBVECTOR %12, %1, 3
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...
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