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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
# Check that we can fold a G_ASHR/G_LSHR fed by a G_SHL into a G_SBFX/G_UBFX.
---
name: apply_ashr_shl_to_sbfx
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: apply_ashr_shl_to_sbfx
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 11
; CHECK: [[SBFX:%[0-9]+]]:_(s32) = G_SBFX [[COPY]], [[C1]](s32), [[C]]
; CHECK: $w0 = COPY [[SBFX]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 5
%2:_(s32) = G_CONSTANT i32 16
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_ASHR %3, %2
$w0 = COPY %4(s32)
...
---
name: apply_ashr_shl_to_sbfx_lower_bound
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: apply_ashr_shl_to_sbfx_lower_bound
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
; CHECK: [[SBFX:%[0-9]+]]:_(s32) = G_SBFX [[COPY]], [[C]](s32), [[C]]
; CHECK: $w0 = COPY [[SBFX]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 30
%2:_(s32) = G_CONSTANT i32 31
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_ASHR %3, %2
$w0 = COPY %4(s32)
...
---
name: apply_ashr_shl_to_sbfx_upper_bound
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: apply_ashr_shl_to_sbfx_upper_bound
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 30
; CHECK: [[SBFX:%[0-9]+]]:_(s32) = G_SBFX [[COPY]], [[C1]](s32), [[C]]
; CHECK: $w0 = COPY [[SBFX]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 1
%2:_(s32) = G_CONSTANT i32 31
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_ASHR %3, %2
$w0 = COPY %4(s32)
...
---
name: apply_lshr_shl_to_ubfx
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: apply_lshr_shl_to_ubfx
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 11
; CHECK: [[UBFX:%[0-9]+]]:_(s32) = G_UBFX [[COPY]], [[C1]](s32), [[C]]
; CHECK: $w0 = COPY [[UBFX]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 5
%2:_(s32) = G_CONSTANT i32 16
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_LSHR %3, %2
$w0 = COPY %4(s32)
...
---
name: apply_lshr_shl_to_ubfx_lower_bound
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: apply_lshr_shl_to_ubfx_lower_bound
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
; CHECK: [[UBFX:%[0-9]+]]:_(s32) = G_UBFX [[COPY]], [[C]](s32), [[C]]
; CHECK: $w0 = COPY [[UBFX]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 30
%2:_(s32) = G_CONSTANT i32 31
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_LSHR %3, %2
$w0 = COPY %4(s32)
...
---
name: apply_lshr_shl_to_ubfx_upper_bound
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: apply_lshr_shl_to_ubfx_upper_bound
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 30
; CHECK: [[UBFX:%[0-9]+]]:_(s32) = G_UBFX [[COPY]], [[C1]](s32), [[C]]
; CHECK: $w0 = COPY [[UBFX]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 1
%2:_(s32) = G_CONSTANT i32 31
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_LSHR %3, %2
$w0 = COPY %4(s32)
...
---
name: dont_apply_pos_out_of_bounds
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: dont_apply_pos_out_of_bounds
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 5
; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
; CHECK: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY]], [[C]](s32)
; CHECK: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C1]](s32)
; CHECK: $w0 = COPY [[ASHR]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 5
%2:_(s32) = G_CONSTANT i32 2
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_ASHR %3, %2
$w0 = COPY %4(s32)
...
---
name: dont_apply_no_constant
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: dont_apply_no_constant
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY $w1
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
; CHECK: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY]], [[COPY1]](s32)
; CHECK: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
; CHECK: $w0 = COPY [[ASHR]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = COPY $w1
%2:_(s32) = G_CONSTANT i32 2
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_ASHR %3, %2
$w0 = COPY %4(s32)
...
---
name: dont_apply_more_than_one_use
legalized: true
body: |
bb.0.entry:
; CHECK-LABEL: name: dont_apply_more_than_one_use
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 5
; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
; CHECK: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY]], [[C]](s32)
; CHECK: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C1]](s32)
; CHECK: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[SHL]], [[ASHR]]
; CHECK: $w0 = COPY [[MUL]](s32)
%0:_(s32) = COPY $w0
%1:_(s32) = G_CONSTANT i32 5
%2:_(s32) = G_CONSTANT i32 16
%3:_(s32) = G_SHL %0, %1
%4:_(s32) = G_ASHR %3, %2
%5:_(s32) = G_MUL %3, %4
$w0 = COPY %5(s32)
...
|
