# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 4
# RUN: llc -mtriple=x86_64-pc-linux-gnu -verify-coalescing -run-pass=register-coalescer -o - %s | FileCheck %s
# The %1 = MOV32r0 is rematerialized as a subregister of %2. The
# implicit-def %1 operand needs to have an undef added, just like the
# main result operand.
---
name: remat_into_subregister_set_undef_implicit_operand_subregisters
tracksRegLiveness: true
body: |
; CHECK-LABEL: name: remat_into_subregister_set_undef_implicit_operand_subregisters
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x80000000)
; CHECK-NEXT: liveins: $rdi
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: undef [[MOV32r0_:%[0-9]+]].sub_32bit:gr64_with_sub_8bit = MOV32r0 implicit-def dead $eflags, implicit-def [[MOV32r0_]]
; CHECK-NEXT: [[MOV32r0_1:%[0-9]+]]:gr32 = MOV32r0 implicit-def dead $eflags, implicit-def [[MOV32r0_1]]
; CHECK-NEXT: undef [[MOV32r0_2:%[0-9]+]].sub_32bit:gr64_with_sub_8bit = MOV32r0 implicit-def dead $eflags, implicit-def undef [[MOV32r0_2]].sub_32bit, implicit-def [[MOV32r0_2]]
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: successors: %bb.2(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[MOV32r0_2:%[0-9]+]].sub_32bit:gr64_with_sub_8bit = XOR32ri [[MOV32r0_2]].sub_32bit, 1, implicit-def dead $eflags
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: successors: %bb.4(0x40000000), %bb.3(0x40000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: JCC_1 %bb.4, 5, implicit killed undef $eflags
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.3:
; CHECK-NEXT: successors: %bb.4(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.4:
; CHECK-NEXT: successors: %bb.1(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: dead [[MOV32rr:%[0-9]+]]:gr32 = MOV32rr [[MOV32r0_1]]
; CHECK-NEXT: dead [[SHL64ri:%[0-9]+]]:gr64_nosp = SHL64ri [[MOV32r0_]], 4, implicit-def dead $eflags
; CHECK-NEXT: [[MOV32r0_1:%[0-9]+]]:gr32 = COPY [[MOV32r0_2]].sub_32bit
; CHECK-NEXT: JMP_1 %bb.1
bb.0:
liveins: $rdi
undef %0.sub_32bit:gr64_with_sub_8bit = MOV32r0 implicit-def dead $eflags, implicit-def %0
%1:gr32 = MOV32r0 implicit-def dead $eflags, implicit-def %1
undef %2.sub_32bit:gr64_with_sub_8bit = COPY %1, implicit-def %2
bb.1:
%2.sub_32bit:gr64_with_sub_8bit = XOR32ri %2.sub_32bit, 1, implicit-def dead $eflags
bb.2:
JCC_1 %bb.4, 5, implicit killed undef $eflags
bb.3:
bb.4:
dead %3:gr32 = MOV32rr %1
dead %4:gr64_nosp = SHL64ri %0, 4, implicit-def dead $eflags
%1:gr32 = COPY %2.sub_32bit
JMP_1 %bb.1
...
# Same, except the implicit-def on the original instruction already
# has a subregister index.
---
name: remat_into_subregister_set_undef_implicit_operand_subregisters_with_subreg
tracksRegLiveness: true
body: |
; CHECK-LABEL: name: remat_into_subregister_set_undef_implicit_operand_subregisters_with_subreg
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x80000000)
; CHECK-NEXT: liveins: $rdi
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: undef [[MOV32r0_:%[0-9]+]].sub_32bit:gr64_with_sub_8bit = MOV32r0 implicit-def dead $eflags, implicit-def [[MOV32r0_]]
; CHECK-NEXT: [[MOV32r0_1:%[0-9]+]]:gr32 = MOV32r0 implicit-def dead $eflags, implicit-def undef [[MOV32r0_1]].sub_8bit
; CHECK-NEXT: undef [[MOV32r0_2:%[0-9]+]].sub_32bit:gr64_with_sub_8bit = MOV32r0 implicit-def dead $eflags, implicit-def undef [[MOV32r0_2]].sub_8bit, implicit-def [[MOV32r0_2]]
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: successors: %bb.2(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[MOV32r0_2:%[0-9]+]].sub_32bit:gr64_with_sub_8bit = XOR32ri [[MOV32r0_2]].sub_32bit, 1, implicit-def dead $eflags
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: successors: %bb.4(0x40000000), %bb.3(0x40000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: JCC_1 %bb.4, 5, implicit killed undef $eflags
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.3:
; CHECK-NEXT: successors: %bb.4(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.4:
; CHECK-NEXT: successors: %bb.1(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: dead [[MOV32rr:%[0-9]+]]:gr32 = MOV32rr [[MOV32r0_1]]
; CHECK-NEXT: dead [[SHL64ri:%[0-9]+]]:gr64_nosp = SHL64ri [[MOV32r0_]], 4, implicit-def dead $eflags
; CHECK-NEXT: [[MOV32r0_1:%[0-9]+]]:gr32 = COPY [[MOV32r0_2]].sub_32bit
; CHECK-NEXT: JMP_1 %bb.1
bb.0:
liveins: $rdi
undef %0.sub_32bit:gr64_with_sub_8bit = MOV32r0 implicit-def dead $eflags, implicit-def %0
%1:gr32 = MOV32r0 implicit-def dead $eflags, undef implicit-def %1.sub_8bit
undef %2.sub_32bit:gr64_with_sub_8bit = COPY %1, implicit-def %2
bb.1:
%2.sub_32bit:gr64_with_sub_8bit = XOR32ri %2.sub_32bit, 1, implicit-def dead $eflags
bb.2:
JCC_1 %bb.4, 5, implicit killed undef $eflags
bb.3:
bb.4:
dead %3:gr32 = MOV32rr %1
dead %4:gr64_nosp = SHL64ri %0, 4, implicit-def dead $eflags
%1:gr32 = COPY %2.sub_32bit
JMP_1 %bb.1
...
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