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.
32 lines
1.0 KiB
YAML
32 lines
1.0 KiB
YAML
# RUN: not --crash llc -o - -run-pass=none -verify-machineinstrs %s 2>&1 | FileCheck %s
|
|
---
|
|
name: g_extract_subvector
|
|
tracksRegLiveness: true
|
|
liveins:
|
|
body: |
|
|
bb.0:
|
|
%0:_(s32) = G_CONSTANT i32 0
|
|
%1:_(<vscale x 2 x s32>) = G_IMPLICIT_DEF
|
|
%2:_(<vscale x 1 x s32>) = G_IMPLICIT_DEF
|
|
|
|
; CHECK: G_EXTRACT_SUBVECTOR first source must be a register
|
|
%3:_(<vscale x 2 x s32>) = G_EXTRACT_SUBVECTOR 1, 0
|
|
|
|
; CHECK: G_EXTRACT_SUBVECTOR index must be an immediate
|
|
%4:_(<vscale x 1 x s32>) = G_EXTRACT_SUBVECTOR %2, %0
|
|
|
|
; CHECK: Destination type must be a vector
|
|
%5:_(s32) = G_EXTRACT_SUBVECTOR %2, 0
|
|
|
|
; CHECK: First source must be a vector
|
|
%6:_(<vscale x 2 x s32>) = G_EXTRACT_SUBVECTOR %0, 0
|
|
|
|
%7:_(<vscale x 1 x s16>) = G_IMPLICIT_DEF
|
|
|
|
; CHECK: Element type of vectors must be the same
|
|
%8:_(<vscale x 2 x s32>) = G_EXTRACT_SUBVECTOR %7, 0
|
|
|
|
; CHECK: Index must be a multiple of the source vector's minimum vector length
|
|
%9:_(<vscale x 4 x s32>) = G_EXTRACT_SUBVECTOR %1, 3
|
|
...
|