forked from OSchip/llvm-project
39 lines
964 B
YAML
39 lines
964 B
YAML
# RUN: llc -march=x86-64 %s -o - -run-pass=processimpdefs -run-pass=unreachable-mbb-elimination | FileCheck %s
|
|
---
|
|
name: f
|
|
tracksRegLiveness: true
|
|
registers:
|
|
- { id: 0, class: gr32, preferred-register: '' }
|
|
- { id: 1, class: gr32, preferred-register: '' }
|
|
- { id: 2, class: gr32, preferred-register: '' }
|
|
body: |
|
|
bb.0:
|
|
%0 = IMPLICIT_DEF
|
|
JMP_1 %bb.1
|
|
|
|
bb.1:
|
|
%1 = PHI %0, %bb.0, %2, %bb.2
|
|
%2 = ADD32ri8 killed %1, 1, implicit-def %eflags
|
|
JMP_1 %bb.3
|
|
|
|
bb.2:
|
|
JMP_1 %bb.1
|
|
|
|
bb.3:
|
|
...
|
|
|
|
# bb2 above is dead and should be removed and the PHI should be replaced with a
|
|
# COPY from an undef value since the bb0 value in the PHI is undef.
|
|
|
|
# CHECK: bb.0:
|
|
# CHECK: successors: %bb.1
|
|
# CHECK: JMP_1 %bb.1
|
|
|
|
# CHECK: bb.1:
|
|
# CHECK: successors: %bb.2
|
|
# CHECK: [[TMP1:%[0-9]+]]:gr32 = COPY undef %{{[0-9]+}}
|
|
# CHECK: %{{[0-9]+}}:gr32 = ADD32ri8 killed [[TMP1]], 1
|
|
# CHECK: JMP_1 %bb.2
|
|
|
|
# CHECK: bb.2:
|