File: twoaddr-dbg-value.mir

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (27 lines) | stat: -rw-r--r-- 810 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
# RUN: llc -run-pass=livevars,twoaddressinstruction -mtriple=x86_64-- -o - %s | FileCheck %s
---
name:            foo
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $edi

    %0:gr32 = COPY killed $edi
    %1:gr32 = COPY killed %0
    %4:gr32 = XOR32ri8 %1, 1, implicit-def dead $eflags
    DBG_VALUE %4
    %5:gr32 = COPY %4
    PUSH32r killed %1, implicit-def $esp, implicit $esp
    $eax = COPY killed %5
    RET64 implicit killed $eax

...

# Verify that the DBG_VALUE instruction does not inhibit
# TwoAddressInstructionPass::rescheduleMIBelowKill optimization

# CHECK: PUSH32r %1, implicit-def $esp, implicit $esp
# CHECK-NEXT: %2:gr32 = COPY killed %1
# CHECK-NEXT: %2:gr32 = XOR32ri8 %2, 1, implicit-def dead $eflags
# CHECK-NEXT: DBG_VALUE %2
# CHECK-NEXT: %3:gr32 = COPY killed %2