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| # RUN: llc -mtriple arm-- -run-pass=legalizer %s -o - | FileCheck %s
# RUN: llc -mtriple thumb-- -mattr=+v6t2 -run-pass=legalizer %s -o - | FileCheck %s
--- |
define void @test_brcond() { ret void }
define void @test_phi_s32() { ret void }
define void @test_phi_p0() { ret void }
define void @test_phi_s8() { ret void }
...
---
name: test_brcond
# CHECK-LABEL: name: test_brcond
legalized: false
# CHECK: legalized: true
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
- { id: 0, class: _ }
- { id: 1, class: _ }
- { id: 2, class: _ }
body: |
bb.0:
successors: %bb.1(0x40000000), %bb.2(0x40000000)
liveins: $r0, $r1
%0(s32) = COPY $r0
%1(s32) = COPY $r1
%2(s1) = G_ICMP intpred(sgt), %0(s32), %1
G_BRCOND %2(s1), %bb.1
; G_BRCOND with s1 is legal, so we should find it unchanged in the output
; CHECK: G_BRCOND {{%[0-9]+}}(s1), %bb.1
G_BR %bb.2
bb.1:
$r0 = COPY %1(s32)
BX_RET 14, $noreg, implicit $r0
bb.2:
$r0 = COPY %0(s32)
BX_RET 14, $noreg, implicit $r0
...
---
name: test_phi_s32
# CHECK-LABEL: name: test_phi_s32
legalized: false
# CHECK: legalized: true
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
- { id: 0, class: _ }
- { id: 1, class: _ }
- { id: 2, class: _ }
- { id: 3, class: _ }
- { id: 4, class: _ }
body: |
bb.0:
liveins: $r0, $r1, $r2
%0(s32) = COPY $r0
%1(s1) = G_TRUNC %0(s32)
%2(s32) = COPY $r1
%3(s32) = COPY $r2
G_BRCOND %1(s1), %bb.1
G_BR %bb.2
bb.1:
G_BR %bb.2
bb.2:
%4(s32) = G_PHI %2(s32), %bb.0, %3(s32), %bb.1
; G_PHI with s32 is legal, so we should find it unchanged in the output
; CHECK: G_PHI {{%[0-9]+}}(s32), %bb.0, {{%[0-9]+}}(s32), %bb.1
$r0 = COPY %4(s32)
BX_RET 14, $noreg, implicit $r0
...
---
name: test_phi_p0
# CHECK-LABEL: name: test_phi_p0
legalized: false
# CHECK: legalized: true
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
- { id: 0, class: _ }
- { id: 1, class: _ }
- { id: 2, class: _ }
- { id: 3, class: _ }
- { id: 4, class: _ }
body: |
bb.0:
liveins: $r0, $r1, $r2
%0(s32) = COPY $r0
%1(s1) = G_TRUNC %0(s32)
%2(p0) = COPY $r1
%3(p0) = COPY $r2
G_BRCOND %1(s1), %bb.1
G_BR %bb.2
bb.1:
G_BR %bb.2
bb.2:
%4(p0) = G_PHI %2(p0), %bb.0, %3(p0), %bb.1
; G_PHI with p0 is legal, so we should find it unchanged in the output
; CHECK: G_PHI {{%[0-9]+}}(p0), %bb.0, {{%[0-9]+}}(p0), %bb.1
$r0 = COPY %4(p0)
BX_RET 14, $noreg, implicit $r0
...
---
name: test_phi_s8
# CHECK-LABEL: name: test_phi_s8
legalized: false
# CHECK: legalized: true
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
- { id: 0, class: _ }
- { id: 1, class: _ }
- { id: 2, class: _ }
- { id: 3, class: _ }
- { id: 4, class: _ }
- { id: 5, class: _ }
- { id: 6, class: _ }
- { id: 7, class: _ }
body: |
bb.0:
liveins: $r0, $r1, $r2
%0(s32) = COPY $r0
%1(s1) = G_TRUNC %0(s32)
%2(s32) = COPY $r1
%3(s8) = G_TRUNC %2(s32)
; CHECK: [[R1:%[0-9]+]]:_(s32) = COPY $r1
%4(s32) = COPY $r2
%5(s8) = G_TRUNC %4(s32)
; CHECK: [[R2:%[0-9]+]]:_(s32) = COPY $r2
; CHECK: [[V1:%[0-9]+]]:_(s32) = COPY [[R1]]
G_BRCOND %1(s1), %bb.1
G_BR %bb.2
bb.1:
; CHECK: [[V2:%[0-9]+]]:_(s32) = COPY [[R2]]
G_BR %bb.2
bb.2:
%6(s8) = G_PHI %3(s8), %bb.0, %5(s8), %bb.1
; G_PHI with s8 should widen, and all the truncs and exts should be combined
; away into a bunch of redundant copies
; CHECK: [[V:%[0-9]+]]:_(s32) = G_PHI [[V1]](s32), %bb.0, [[V2]](s32), %bb.1
%7(s32) = G_ANYEXT %6(s8)
$r0 = COPY %7(s32)
; CHECK: [[R:%[0-9]+]]:_(s32) = COPY [[V]]
; CHECK: $r0 = COPY [[R]](s32)
BX_RET 14, $noreg, implicit $r0
...
|