llvm-mirror/test/CodeGen/X86/machine-copy-prop.mir

# RUN: llc -march=x86 -run-pass machine-cp -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck %s

--- |
  declare void @foo()
  define void @copyprop_remove_kill0() { ret void }
  define void @copyprop_remove_kill1() { ret void }
  define void @copyprop_remove_kill2() { ret void }
...
---
# The second copy is redundand and will be removed, check that we also remove
# the kill flag of intermediate instructions.
# CHECK-LABEL: name: copyprop_remove_kill0
# CHECK: bb.0:
# CHECK-NEXT: %rax = COPY %rdi
# CHECK-NEXT: NOOP implicit %rdi
# CHECK-NOT: COPY
# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
name: copyprop_remove_kill0
body: |
  bb.0:
    %rax = COPY %rdi
    NOOP implicit killed %rdi
    %rdi = COPY %rax
    NOOP implicit %rax, implicit %rdi
...
---
# The second copy is redundand and will be removed, check that we also remove
# the kill flag of intermediate instructions.
# CHECK-LABEL: name: copyprop_remove_kill1
# CHECK: bb.0:
# CHECK-NEXT: %rax = COPY %rdi
# CHECK-NEXT: NOOP implicit %edi
# CHECK-NOT: COPY
# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
name: copyprop_remove_kill1
body: |
  bb.0:
    %rax = COPY %rdi
    NOOP implicit killed %edi
    %rdi = COPY %rax
    NOOP implicit %rax, implicit %rdi
...
---
# The second copy is redundand and will be removed, check that we also remove
# the kill flag of intermediate instructions.
# CHECK-LABEL: name: copyprop_remove_kill2
# CHECK: bb.0:
# CHECK-NEXT: %ax = COPY %di
# CHECK-NEXT: NOOP implicit %rdi
# CHECK-NOT: COPY
# CHECK-NEXT: NOOP implicit %rax, implicit %rdi
name: copyprop_remove_kill2
body: |
  bb.0:
    %ax = COPY %di
    NOOP implicit killed %rdi
    %di = COPY %ax
    NOOP implicit %rax, implicit %rdi
...