test/CodeGen/MIR/X86/basic-block-liveins.mir

# RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s | FileCheck %s
# This test ensures that the MIR parser parses basic block liveins correctly.

--- |

  define i32 @test(i32 %a, i32 %b) {
  body:
    %c = add i32 %a, %b
    ret i32 %c
  }

  define i32 @test2(i32 %a, i32 %b) {
  body:
    %c = add i32 %a, %b
    ret i32 %c
  }

  define i32 @test3() {
  body:
    ret i32 0
  }

...
---
name:            test
body: |
  ; CHECK-LABEL: bb.0.body:
  ; CHECK-NEXT:    liveins: %edi, %esi
  bb.0.body:
    liveins: %edi, %esi

    %eax = LEA64_32r killed %rdi, 1, killed %rsi, 0, _
    RETQ %eax
...
---
name:            test2
body: |
  ; CHECK-LABEL: name: test2
  ; Verify that we can have multiple lists of liveins that will be merged into
  ; one.
  ; CHECK:       bb.0.body:
  ; CHECK-NEXT:    liveins: %edi, %esi
  bb.0.body:
    liveins: %edi
    liveins: %esi

    %eax = LEA64_32r killed %rdi, 1, killed %rsi, 0, _
    RETQ %eax
...
---
name:            test3
body: |
  ; Verify that we can have an empty list of liveins.
  ; CHECK-LABEL: name: test3
  ; CHECK:       bb.0.body:
  ; CHECK-NEXT:    %eax = MOV32r0 implicit-def dead %eflags
  bb.0.body:
    liveins:

    %eax = MOV32r0 implicit-def dead %eflags
    RETQ killed %eax
...