llvm-project/llvm/test/CodeGen/X86/GlobalISel/select-leaf-constant.mir

# RUN: llc -mtriple=i586-linux-gnu -mcpu=haswell -mattr=-slow-incdec -global-isel -run-pass=instruction-select %s -o - | FileCheck %s --check-prefix=CHECK
#
# This is necessary to test that attribute-based rule predicates work and that
# they properly reset between functions.

--- |
  define i32 @const_i32_1() {
    ret i32 1
  }

  define i32 @const_i32_1_optsize() #0 {
    ret i32 1
  }

  define i32 @const_i32_1b() {
    ret i32 1
  }

  define i32 @const_i32_1_optsizeb() #0 {
    ret i32 1
  }

  attributes #0 = { optsize }
...
---
name:            const_i32_1
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name: const_i32_1
# CHECK:       registers:
# CHECK-NEXT:  - { id: 0, class: gr32, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV32ri 1
body:             |
  bb.1 (%ir-block.0):
    %0(s32) = G_CONSTANT i32 1
    %eax = COPY %0(s32)
    RET 0, implicit %eax
...
---
name:            const_i32_1_optsize
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name: const_i32_1_optsize
# CHECK:       registers:
# CHECK-NEXT:  - { id: 0, class: gr32, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV32r1
body:             |
  bb.1 (%ir-block.0):
    %0(s32) = G_CONSTANT i32 1
    %eax = COPY %0(s32)
    RET 0, implicit %eax
...
---
name:            const_i32_1b
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name: const_i32_1b
# CHECK:       registers:
# CHECK-NEXT:  - { id: 0, class: gr32, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV32ri 1
body:             |
  bb.1 (%ir-block.0):
    %0(s32) = G_CONSTANT i32 1
    %eax = COPY %0(s32)
    RET 0, implicit %eax
...
---
name:            const_i32_1_optsizeb
legalized:       true
regBankSelected: true
selected:        false
# CHECK-LABEL: name: const_i32_1_optsizeb
# CHECK:       registers:
# CHECK-NEXT:  - { id: 0, class: gr32, preferred-register: '' }
registers:
  - { id: 0, class: gpr }
# CHECK:  body:
# CHECK:    %0 = MOV32r1
body:             |
  bb.1 (%ir-block.0):
    %0(s32) = G_CONSTANT i32 1
    %eax = COPY %0(s32)
    RET 0, implicit %eax
...