postlegalizer-combiner-shuffle-splat.mir
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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=aarch64 -run-pass=aarch64-postlegalizer-combiner -verify-machineinstrs %s -o - | FileCheck %s
---
name: splat_4xi32
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $w0
; CHECK-LABEL: name: splat_4xi32
; CHECK: liveins: $w0
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[DUP:%[0-9]+]]:_(<4 x s32>) = G_DUP [[COPY]](s32)
; CHECK: $q0 = COPY [[DUP]](<4 x s32>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s32) = COPY $w0
%2:_(<4 x s32>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<4 x s32>) = G_INSERT_VECTOR_ELT %2, %0(s32), %3(s32)
%4:_(<4 x s32>) = G_SHUFFLE_VECTOR %1(<4 x s32>), %2, shufflemask(0, 0, 0, 0)
$q0 = COPY %4(<4 x s32>)
RET_ReallyLR implicit $q0
...
---
name: splat_2xi64
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $x0
; CHECK-LABEL: name: splat_2xi64
; CHECK: liveins: $x0
; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
; CHECK: [[DUP:%[0-9]+]]:_(<2 x s64>) = G_DUP [[COPY]](s64)
; CHECK: $q0 = COPY [[DUP]](<2 x s64>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s64) = COPY $x0
%2:_(<2 x s64>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<2 x s64>) = G_INSERT_VECTOR_ELT %2, %0(s64), %3(s32)
%4:_(<2 x s64>) = G_SHUFFLE_VECTOR %1(<2 x s64>), %2, shufflemask(0, 0)
$q0 = COPY %4(<2 x s64>)
RET_ReallyLR implicit $q0
...
---
name: splat_2xi32
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $w0
; CHECK-LABEL: name: splat_2xi32
; CHECK: liveins: $w0
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[DUP:%[0-9]+]]:_(<2 x s32>) = G_DUP [[COPY]](s32)
; CHECK: $d0 = COPY [[DUP]](<2 x s32>)
; CHECK: RET_ReallyLR implicit $d0
%0:_(s32) = COPY $w0
%2:_(<2 x s32>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<2 x s32>) = G_INSERT_VECTOR_ELT %2, %0(s32), %3(s32)
%4:_(<2 x s32>) = G_SHUFFLE_VECTOR %1(<2 x s32>), %2, shufflemask(0, 0)
$d0 = COPY %4(<2 x s32>)
RET_ReallyLR implicit $d0
...
---
name: splat_4xf32
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $s0
; CHECK-LABEL: name: splat_4xf32
; CHECK: liveins: $s0
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $s0
; CHECK: [[DUP:%[0-9]+]]:_(<4 x s32>) = G_DUP [[COPY]](s32)
; CHECK: $q0 = COPY [[DUP]](<4 x s32>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s32) = COPY $s0
%2:_(<4 x s32>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<4 x s32>) = G_INSERT_VECTOR_ELT %2, %0(s32), %3(s32)
%4:_(<4 x s32>) = G_SHUFFLE_VECTOR %1(<4 x s32>), %2, shufflemask(0, 0, 0, 0)
$q0 = COPY %4(<4 x s32>)
RET_ReallyLR implicit $q0
...
---
name: splat_2xf64
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $d0
; CHECK-LABEL: name: splat_2xf64
; CHECK: liveins: $d0
; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $d0
; CHECK: [[DUP:%[0-9]+]]:_(<2 x s64>) = G_DUP [[COPY]](s64)
; CHECK: $q0 = COPY [[DUP]](<2 x s64>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s64) = COPY $d0
%2:_(<2 x s64>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<2 x s64>) = G_INSERT_VECTOR_ELT %2, %0(s64), %3(s32)
%4:_(<2 x s64>) = G_SHUFFLE_VECTOR %1(<2 x s64>), %2, shufflemask(0, 0)
$q0 = COPY %4(<2 x s64>)
RET_ReallyLR implicit $q0
...
---
name: splat_2xf32
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $s0
; CHECK-LABEL: name: splat_2xf32
; CHECK: liveins: $s0
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $s0
; CHECK: [[DUP:%[0-9]+]]:_(<2 x s32>) = G_DUP [[COPY]](s32)
; CHECK: $d0 = COPY [[DUP]](<2 x s32>)
; CHECK: RET_ReallyLR implicit $d0
%0:_(s32) = COPY $s0
%2:_(<2 x s32>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<2 x s32>) = G_INSERT_VECTOR_ELT %2, %0(s32), %3(s32)
%4:_(<2 x s32>) = G_SHUFFLE_VECTOR %1(<2 x s32>), %2, shufflemask(0, 0)
$d0 = COPY %4(<2 x s32>)
RET_ReallyLR implicit $d0
...
---
name: splat_2xf64_copies
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $d0
; This test is exactly the same as splat_2xf64, except it adds two copies.
; These copies shouldn't get in the way of matching the dup pattern.
; CHECK-LABEL: name: splat_2xf64_copies
; CHECK: liveins: $d0
; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $d0
; CHECK: [[DUP:%[0-9]+]]:_(<2 x s64>) = G_DUP [[COPY]](s64)
; CHECK: $q0 = COPY [[DUP]](<2 x s64>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s64) = COPY $d0
%2:_(<2 x s64>) = G_IMPLICIT_DEF
%6:_(<2 x s64>) = COPY %2
%3:_(s32) = G_CONSTANT i32 0
%1:_(<2 x s64>) = G_INSERT_VECTOR_ELT %6, %0(s64), %3(s32)
%7:_(<2 x s64>) = COPY %1
%4:_(<2 x s64>) = G_SHUFFLE_VECTOR %7(<2 x s64>), %2, shufflemask(0, 0)
$q0 = COPY %4(<2 x s64>)
RET_ReallyLR implicit $q0
...
---
name: not_all_zeros
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $x0
; Make sure that we don't do the optimization when it's not all zeroes.
; CHECK-LABEL: name: not_all_zeros
; CHECK: liveins: $x0
; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
; CHECK: [[DEF:%[0-9]+]]:_(<2 x s64>) = G_IMPLICIT_DEF
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
; CHECK: [[IVEC:%[0-9]+]]:_(<2 x s64>) = G_INSERT_VECTOR_ELT [[DEF]], [[COPY]](s64), [[C]](s32)
; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
; CHECK: [[EXT:%[0-9]+]]:_(<2 x s64>) = G_EXT [[IVEC]], [[DEF]], [[C1]](s32)
; CHECK: $q0 = COPY [[EXT]](<2 x s64>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s64) = COPY $x0
%2:_(<2 x s64>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<2 x s64>) = G_INSERT_VECTOR_ELT %2, %0(s64), %3(s32)
%4:_(<2 x s64>) = G_SHUFFLE_VECTOR %1(<2 x s64>), %2, shufflemask(0, 1)
$q0 = COPY %4(<2 x s64>)
RET_ReallyLR implicit $q0
...
---
name: all_undef
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $x0
; If all the elements are undefined, we consider it a splat. In this case,
; we can choose 0 as our index.
;
; We should get a G_DUP here.
;
; CHECK-LABEL: name: all_undef
; CHECK: liveins: $x0
; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
; CHECK: [[DUP:%[0-9]+]]:_(<2 x s64>) = G_DUP [[COPY]](s64)
; CHECK: $q0 = COPY [[DUP]](<2 x s64>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s64) = COPY $x0
%2:_(<2 x s64>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<2 x s64>) = G_INSERT_VECTOR_ELT %2, %0(s64), %3(s32)
%4:_(<2 x s64>) = G_SHUFFLE_VECTOR %1(<2 x s64>), %2, shufflemask(-1, -1)
$q0 = COPY %4(<2 x s64>)
RET_ReallyLR implicit $q0
...
---
name: one_undef
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $s0
; Make sure we can skip past undef values.
;
; We should get a G_DUP here.
;
; CHECK-LABEL: name: one_undef
; CHECK: liveins: $s0
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $s0
; CHECK: [[DUP:%[0-9]+]]:_(<4 x s32>) = G_DUP [[COPY]](s32)
; CHECK: $q0 = COPY [[DUP]](<4 x s32>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s32) = COPY $s0
%2:_(<4 x s32>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<4 x s32>) = G_INSERT_VECTOR_ELT %2, %0(s32), %3(s32)
%4:_(<4 x s32>) = G_SHUFFLE_VECTOR %1(<4 x s32>), %2, shufflemask(0, -1, 0, 0)
$q0 = COPY %4(<4 x s32>)
RET_ReallyLR implicit $q0
...
---
name: not_all_zeros_with_undefs
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $s0
; Check a non-splat mask with an undef value. We shouldn't get a G_DUP here.
;
; CHECK-LABEL: name: not_all_zeros_with_undefs
; CHECK: liveins: $s0
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $s0
; CHECK: [[DEF:%[0-9]+]]:_(<4 x s32>) = G_IMPLICIT_DEF
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
; CHECK: [[IVEC:%[0-9]+]]:_(<4 x s32>) = G_INSERT_VECTOR_ELT [[DEF]], [[COPY]](s32), [[C]](s32)
; CHECK: [[SHUF:%[0-9]+]]:_(<4 x s32>) = G_SHUFFLE_VECTOR [[IVEC]](<4 x s32>), [[DEF]], shufflemask(undef, 0, 0, 3)
; CHECK: $q0 = COPY [[SHUF]](<4 x s32>)
; CHECK: RET_ReallyLR implicit $q0
%0:_(s32) = COPY $s0
%2:_(<4 x s32>) = G_IMPLICIT_DEF
%3:_(s32) = G_CONSTANT i32 0
%1:_(<4 x s32>) = G_INSERT_VECTOR_ELT %2, %0(s32), %3(s32)
%4:_(<4 x s32>) = G_SHUFFLE_VECTOR %1(<4 x s32>), %2, shufflemask(-1, 0, 0, 3)
$q0 = COPY %4(<4 x s32>)
RET_ReallyLR implicit $q0
...
---
name: splat_4xi16
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $h0
; CHECK-LABEL: name: splat_4xi16
; CHECK: liveins: $h0
; CHECK: %copy:_(s16) = COPY $h0
; CHECK: %splat:_(<4 x s16>) = G_DUP %copy(s16)
; CHECK: $d0 = COPY %splat(<4 x s16>)
; CHECK: RET_ReallyLR implicit $d0
%copy:_(s16) = COPY $h0
%undef:_(<4 x s16>) = G_IMPLICIT_DEF
%cst:_(s32) = G_CONSTANT i32 0
%ins:_(<4 x s16>) = G_INSERT_VECTOR_ELT %undef, %copy(s16), %cst(s32)
%splat:_(<4 x s16>) = G_SHUFFLE_VECTOR %ins(<4 x s16>), %undef, shufflemask(0, 0, 0, 0)
$d0 = COPY %splat(<4 x s16>)
RET_ReallyLR implicit $d0
...
---
name: splat_8xi8
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $w0
; CHECK-LABEL: name: splat_8xi8
; CHECK: liveins: $w0
; CHECK: %copy:_(s32) = COPY $w0
; CHECK: %splat:_(<8 x s8>) = G_DUP %copy(s32)
; CHECK: $d0 = COPY %splat(<8 x s8>)
; CHECK: RET_ReallyLR implicit $d0
%copy:_(s32) = COPY $w0
%undef:_(<8 x s8>) = G_IMPLICIT_DEF
%cst:_(s32) = G_CONSTANT i32 0
%ins:_(<8 x s8>) = G_INSERT_VECTOR_ELT %undef, %copy(s32), %cst(s32)
%splat:_(<8 x s8>) = G_SHUFFLE_VECTOR %ins(<8 x s8>), %undef, shufflemask(0, 0, 0, 0, 0, 0, 0, 0)
$d0 = COPY %splat(<8 x s8>)
RET_ReallyLR implicit $d0
...
---
name: build_vector
alignment: 4
legalized: true
tracksRegLiveness: true
body: |
bb.1.entry:
liveins: $w0, $w1, $w2, $w3
; The G_SHUFFLE_VECTOR is fed by a G_BUILD_VECTOR, and the 0th input
; operand is not a constant. We should get a G_DUP.
;
; CHECK-LABEL: name: build_vector
; CHECK: liveins: $w0, $w1, $w2, $w3
; CHECK: %lane:_(s32) = COPY $w0
; CHECK: %shuf:_(<4 x s32>) = G_DUP %lane(s32)
; CHECK: $q0 = COPY %shuf(<4 x s32>)
; CHECK: RET_ReallyLR implicit $q0
%lane:_(s32) = COPY $w0
%b:_(s32) = COPY $w1
%c:_(s32) = COPY $w2
%d:_(s32) = COPY $w3
%undef:_(<4 x s32>) = G_IMPLICIT_DEF
%buildvec:_(<4 x s32>) = G_BUILD_VECTOR %lane, %b, %c, %d
%shuf:_(<4 x s32>) = G_SHUFFLE_VECTOR %buildvec(<4 x s32>), %undef, shufflemask(0, 0, 0, 0)
$q0 = COPY %shuf(<4 x s32>)
RET_ReallyLR implicit $q0