test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir

# RUN: llc -mtriple arm-- -global-isel -run-pass=regbankselect %s -o - | FileCheck %s
--- |
  define void @test_add_s32() { ret void }
  define void @test_sub_s32() { ret void }
  define void @test_mul_s32() { ret void }

  define void @test_sdiv_s32() #1 { ret void }
  define void @test_udiv_s32() #1 { ret void }

  define void @test_and_s32() { ret void}
  define void @test_or_s32() { ret void}
  define void @test_xor_s32() { ret void}

  define void @test_lshr_s32() { ret void }
  define void @test_ashr_s32() { ret void }
  define void @test_shl_s32() { ret void }

  define void @test_loads() #0 { ret void }
  define void @test_stores() #0 { ret void }

  define void @test_stack() { ret void }

  define void @test_gep() { ret void }

  define void @test_constants() { ret void }

  @a_global = global float 1.0
  define void @test_globals() { ret void }

  define void @test_anyext_s8_32() { ret void }
  define void @test_anyext_s16_32() { ret void }

  define void @test_trunc_s32_16() { ret void }

  define void @test_icmp_eq_s32() { ret void }
  define void @test_fcmp_one_s32() #0 { ret void }
  define void @test_fcmp_ugt_s64() #0 { ret void }

  define void @test_select_s32() { ret void }

  define void @test_br() { ret void }

  define void @test_fadd_s32() #0 { ret void }
  define void @test_fadd_s64() #0 { ret void }

  define void @test_fsub_s32() #0 { ret void }
  define void @test_fsub_s64() #0 { ret void }

  define void @test_soft_fp_s64() #0 { ret void }

  attributes #0 = { "target-features"="+vfp2"}
  attributes #1 = { "target-features"="+hwdiv-arm" }
...
---
name:            test_add_s32
# CHECK-LABEL: name: test_add_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_ADD %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_sub_s32
# CHECK-LABEL: name: test_sub_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_SUB %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_mul_s32
# CHECK-LABEL: name: test_mul_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_MUL %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_sdiv_s32
# CHECK-LABEL: name: test_sdiv_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_SDIV %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_udiv_s32
# CHECK-LABEL: name: test_udiv_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_UDIV %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_and_s32
# CHECK-LABEL: name: test_and_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_AND %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_or_s32
# CHECK-LABEL: name: test_or_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_OR %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_xor_s32
# CHECK-LABEL: name: test_xor_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_XOR %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_lshr_s32
# CHECK-LABEL: name: test_lshr_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_LSHR %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_ashr_s32
# CHECK-LABEL: name: test_ashr_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_ASHR %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_shl_s32
# CHECK-LABEL: name: test_shl_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s32) = G_SHL %0, %1
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_loads
# CHECK-LABEL: name: test_loads
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }
# CHECK: - { id: 4, class: gprb, preferred-register: '' }
# CHECK: - { id: 5, class: gprb, preferred-register: '' }
# CHECK: - { id: 6, class: fprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
  - { id: 4, class: _ }
  - { id: 5, class: _ }
  - { id: 6, class: _ }
body:             |
  bb.0:
    liveins: %r0
    %0(p0) = COPY %r0
    %6(s64) = G_LOAD %0 :: (load 8)
    %1(s32) = G_LOAD %0 :: (load 4)
    %2(s16) = G_LOAD %0 :: (load 2)
    %3(s8)  = G_LOAD %0 :: (load 1)
    %4(s1)  = G_LOAD %0 :: (load 1)
    %5(p0)  = G_LOAD %0 :: (load 4)
    BX_RET 14, _, implicit %r0

...
---
name:            test_stores
# CHECK-LABEL: name: test_stores
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }
# CHECK: - { id: 4, class: gprb, preferred-register: '' }
# CHECK: - { id: 5, class: gprb, preferred-register: '' }
# CHECK: - { id: 6, class: fprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
  - { id: 4, class: _ }
  - { id: 5, class: _ }
  - { id: 6, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1, %r5, %d6
    %0(p0) = COPY %r0
    %1(s32) = COPY %r1
    G_STORE %1(s32), %0 :: (store 4)
    %2(s16) = G_TRUNC %1(s32)
    G_STORE %2(s16), %0 :: (store 2)
    %3(s8) = G_TRUNC %1(s32)
    G_STORE %3(s8), %0 :: (store 1)
    %4(s1) = G_TRUNC %1(s32)
    G_STORE %4(s1), %0 :: (store 1)
    %5(p0) = COPY %r5
    G_STORE %5(p0), %0 :: (store 4)
    %6(s64) = COPY %d6
    G_STORE %6(s64), %0 :: (store 8)
    BX_RET 14, _, implicit %r0

...
---
name:            test_stack
# CHECK-LABEL: name: test_stack
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }
# CHECK: - { id: 4, class: gprb, preferred-register: '' }
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
  - { id: 4, class: _ }
fixedStack:
  - { id: 0, offset: 0, size: 4, alignment: 4, isImmutable: true, isAliased: false }
body:             |
  bb.0:
    %0(p0) = G_FRAME_INDEX %fixed-stack.0
    %1(s32) = G_LOAD %0(p0) :: (load 4 from %fixed-stack.0, align 0)

    %2(p0) = COPY %sp
    %3(s32) = G_CONSTANT i32 8
    %4(p0) = G_GEP %2, %3(s32)
    G_STORE %1(s32), %4(p0) :: (store 4)

    BX_RET 14, _

...
---
name:            test_gep
# CHECK-LABEL: name: test_gep
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(p0) = COPY %r0
    %1(s32) = COPY %r1
    %2(p0) = G_GEP %0, %1(s32)
    %r0 = COPY %2(p0)
    BX_RET 14, _, implicit %r0
...
---
name:            test_constants
# CHECK-LABEL: name: test_constants
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
registers:
  - { id: 0, class: _ }
body:             |
  bb.0:
    %0(s32) = G_CONSTANT 42
    %r0 = COPY %0(s32)
    BX_RET 14, _, implicit %r0
...
---
name:            test_globals
# CHECK-LABEL: name: test_globals
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
registers:
  - { id: 0, class: _ }
body:             |
  bb.0:
    %0(p0) = G_GLOBAL_VALUE @a_global
    %r0 = COPY %0(p0)
    BX_RET 14, _, implicit %r0
...
---
name:            test_anyext_s8_32
# CHECK-LABEL: name: test_anyext_s8_32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0

    %0(s32) = COPY %r0
    %1(s8) = G_TRUNC %0(s32)
    %2(s32) = G_ANYEXT %1(s8)
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0
...
---
name:            test_anyext_s16_32
# CHECK-LABEL: name: test_anyext_s16_32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0

    %0(s32) = COPY %r0
    %1(s16) = G_TRUNC %0(s32)
    %2(s32) = G_ANYEXT %1(s16)
    %r0 = COPY %2(s32)
    BX_RET 14, _, implicit %r0
...
---
name:            test_trunc_s32_16
# CHECK-LABEL: name: test_trunc_s32_16
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %2(p0) = COPY %r1
    %1(s16) = G_TRUNC %0(s32)
    G_STORE %1(s16), %2 :: (store 2)
    BX_RET 14, _
...
---
name:            test_icmp_eq_s32
# CHECK-LABEL: name: test_icmp_eq_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s1) = G_ICMP intpred(eq), %0(s32), %1
    %3(s32) = G_ZEXT %2(s1)
    %r0 = COPY %3(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_fcmp_one_s32
# CHECK-LABEL: name: test_fcmp_one_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: fprb, preferred-register: '' }
# CHECK: - { id: 1, class: fprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
body:             |
  bb.0:
    liveins: %s0, %s1

    %0(s32) = COPY %s0
    %1(s32) = COPY %s1
    %2(s1) = G_FCMP floatpred(one), %0(s32), %1
    %3(s32) = G_ZEXT %2(s1)
    %r0 = COPY %3(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_fcmp_ugt_s64
# CHECK-LABEL: name: test_fcmp_ugt_s64
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: fprb, preferred-register: '' }
# CHECK: - { id: 1, class: fprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
body:             |
  bb.0:
    liveins: %d0, %d1

    %0(s64) = COPY %d0
    %1(s64) = COPY %d1
    %2(s1) = G_FCMP floatpred(ugt), %0(s64), %1
    %3(s32) = G_ZEXT %2(s1)
    %r0 = COPY %3(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_select_s32
# CHECK-LABEL: name: test_select_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: gprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }
# CHECK: - { id: 4, class: gprb, preferred-register: '' }

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(s32) = COPY %r1
    %2(s32) = COPY %r2
    %3(s1) = G_TRUNC %2(s32)
    %4(s32) = G_SELECT %3(s1), %0, %1
    %r0 = COPY %4(s32)
    BX_RET 14, _, implicit %r0

...
---
name:            test_br
# CHECK-LABEL: name: test_br
legalized:       true
regBankSelected: false
# CHECK: regBankSelected: true
selected:        false
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
# CHECK: { id: 0, class: gprb, preferred-register: '' }
# CHECK: { id: 1, class: gprb, preferred-register: '' }
# Check that we map the condition of the G_BRCOND into the GPR.
# For the G_BR, there are no registers to map, but make sure we don't crash.
body:             |
  bb.0:
    successors: %bb.1(0x40000000), %bb.2(0x40000000)
    liveins: %r0

    %0(s32) = COPY %r0
    %1(s1) = G_TRUNC %0(s32)
    G_BRCOND %1(s1), %bb.1
    G_BR %bb.2

  bb.1:
    BX_RET 14, _

  bb.2:
    BX_RET 14, _

...
---
name:            test_fadd_s32
# CHECK-LABEL: name: test_fadd_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: fprb, preferred-register: '' }
# CHECK: - { id: 1, class: fprb, preferred-register: '' }
# CHECK: - { id: 2, class: fprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %s0, %s1

    %0(s32) = COPY %s0
    %1(s32) = COPY %s1
    %2(s32) = G_FADD %0, %1
    %s0 = COPY %2(s32)
    BX_RET 14, _, implicit %s0

...
---
name:            test_fadd_s64
# CHECK-LABEL: name: test_fadd_s64
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: fprb, preferred-register: '' }
# CHECK: - { id: 1, class: fprb, preferred-register: '' }
# CHECK: - { id: 2, class: fprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %d0, %d1

    %0(s64) = COPY %d0
    %1(s64) = COPY %d1
    %2(s64) = G_FADD %0, %1
    %d0 = COPY %2(s64)
    BX_RET 14, _, implicit %d0

...
---
name:            test_fsub_s32
# CHECK-LABEL: name: test_fsub_s32
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: fprb, preferred-register: '' }
# CHECK: - { id: 1, class: fprb, preferred-register: '' }
# CHECK: - { id: 2, class: fprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %s0, %s1

    %0(s32) = COPY %s0
    %1(s32) = COPY %s1
    %2(s32) = G_FSUB %0, %1
    %s0 = COPY %2(s32)
    BX_RET 14, _, implicit %s0

...
---
name:            test_fsub_s64
# CHECK-LABEL: name: test_fsub_s64
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: fprb, preferred-register: '' }
# CHECK: - { id: 1, class: fprb, preferred-register: '' }
# CHECK: - { id: 2, class: fprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
body:             |
  bb.0:
    liveins: %d0, %d1

    %0(s64) = COPY %d0
    %1(s64) = COPY %d1
    %2(s64) = G_FSUB %0, %1
    %d0 = COPY %2(s64)
    BX_RET 14, _, implicit %d0

...
---
name:            test_soft_fp_s64
# CHECK-LABEL: name: test_soft_fp_s64
legalized:       true
regBankSelected: false
selected:        false
# CHECK: registers:
# CHECK: - { id: 0, class: gprb, preferred-register: '' }
# CHECK: - { id: 1, class: gprb, preferred-register: '' }
# CHECK: - { id: 2, class: fprb, preferred-register: '' }
# CHECK: - { id: 3, class: gprb, preferred-register: '' }
# CHECK: - { id: 4, class: gprb, preferred-register: '' }

registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
  - { id: 4, class: _ }
body:             |
  bb.0:
    liveins: %r0, %r1

    %0(s32) = COPY %r0
    %1(s32) = COPY %r1
    %2(s64) = G_MERGE_VALUES %0(s32), %1(s32)
    %3(s32), %4(s32) = G_UNMERGE_VALUES %2(s64)
    %r0 = COPY %3(s32)
    %r1 = COPY %4(s32)
    BX_RET 14, _, implicit %r0, implicit %r1

...