test/CodeGen/X86/GlobalISel/select-constant.mir

# RUN: llc -mtriple=x86_64-linux-gnu -global-isel -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s --check-prefix=CHECK

--- |
  define i8 @const_i8() {
    ret i8 2
  }

  define i16 @const_i16() {
    ret i16 3
  }

  define i32 @const_i32() {
    ret i32 4
  }

  define i32 @const_i32_0() {
    ret i32 0
  }

  define i64 @const_i64() {
    ret i64 68719476720
  }

  define i64 @const_i64_u32() {
    ret i64 1879048192
  }

  define i64 @const_i64_i32() {
    ret i64 -1
  }

  define void @main(i32** %data) {
    store i32* null, i32** %data, align 8
    ret void
  }

...
---
name:            const_i8
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name:            const_i8
# CHECK: registers:
# CHECK-NEXT:  - { id: 0, class: gr8, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV8ri 2
body:             |
  bb.1 (%ir-block.0):
    %0(s8) = G_CONSTANT i8 2
    %al = COPY %0(s8)
    RET 0, implicit %al

...
---
name:            const_i16
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name:            const_i16
# CHECK: registers:
# CHECK-NEXT:  - { id: 0, class: gr16, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV16ri 3
body:             |
  bb.1 (%ir-block.0):
    %0(s16) = G_CONSTANT i16 3
    %ax = COPY %0(s16)
    RET 0, implicit %ax

...
---
name:            const_i32
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name:            const_i32
# CHECK: registers:
# CHECK-NEXT:  - { id: 0, class: gr32, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV32ri 4
body:             |
  bb.1 (%ir-block.0):
    %0(s32) = G_CONSTANT i32 4
    %eax = COPY %0(s32)
    RET 0, implicit %eax

...
---
name:            const_i32_0
# CHECK-LABEL: name:  const_i32_0
legalized:       true
regBankSelected: true
# CHECK:      registers:
# CHECK-NEXT:   - { id: 0, class: gr32, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:          %0 = MOV32r0 implicit-def %eflags
body:             |
  bb.1 (%ir-block.0):
    %0(s32) = G_CONSTANT i32 0
    %eax = COPY %0(s32)
    RET 0, implicit %eax

...
---
name:            const_i64
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name:            const_i64
# CHECK: registers:
# CHECK-NEXT:  - { id: 0, class: gr64, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV64ri 68719476720
body:             |
  bb.1 (%ir-block.0):
    %0(s64) = G_CONSTANT i64 68719476720
    %rax = COPY %0(s64)
    RET 0, implicit %rax

...
---
name:            const_i64_u32
alignment:       4
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name:            const_i64_u32
# CHECK: registers:
# CHECK-NEXT:  - { id: 0, class: gr64, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV64ri32 1879048192
body:             |
  bb.1 (%ir-block.0):
    %0(s64) = G_CONSTANT i64 1879048192
    %rax = COPY %0(s64)
    RET 0, implicit %rax

...
---
name:            const_i64_i32
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name:            const_i64_i32
# CHECK: registers:
# CHECK-NEXT:  - { id: 0, class: gr64, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV64ri32 -1
body:             |
  bb.1 (%ir-block.0):
    %0(s64) = G_CONSTANT i64 -1
    %rax = COPY %0(s64)
    RET 0, implicit %rax

...
---
name:            main
# CHECK-LABEL: name:  main
alignment:       4
legalized:       true
regBankSelected: true
# CHECK:      registers:
# CHECK-NEXT:   - { id: 0, class: gr64, preferred-register: '' }
# CHECK-NEXT:   - { id: 1, class: gr64, preferred-register: '' }
registers:
  - { id: 0, class: gpr, preferred-register: '' }
  - { id: 1, class: gpr, preferred-register: '' }
# CHECK:          %0 = COPY %rdi
# CHECK-NEXT:     %1 = MOV64ri32 0
# CHECK-NEXT:     MOV64mr %0, 1, _, 0, _, %1 :: (store 8 into %ir.data)
# CHECK-NEXT:     RET 0
body:             |
  bb.1 (%ir-block.0):
    liveins: %rdi

    %0(p0) = COPY %rdi
    %1(p0) = G_CONSTANT i64 0
    G_STORE %1(p0), %0(p0) :: (store 8 into %ir.data)
    RET 0

...