File: opt-fold-trunc-tbz-tbnz.mir

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (34 lines) | stat: -rw-r--r-- 1,118 bytes parent folder | download | duplicates (11) 
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
28
29
30
31
32
33
34
 
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64-unknown-unknown -run-pass=instruction-select -global-isel-abort=1 -verify-machineinstrs %s -o - | FileCheck %s
...
---
name:            fold_trunc
alignment:       4
legalized:       true
regBankSelected: true
tracksRegLiveness: true
body:             |
  ; CHECK-LABEL: name: fold_trunc
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.0(0x40000000), %bb.1(0x40000000)
  ; CHECK:   liveins: $x0
  ; CHECK:   %copy:gpr64all = COPY $x0
  ; CHECK:   [[COPY:%[0-9]+]]:gpr32all = COPY %copy.sub_32
  ; CHECK:   [[COPY1:%[0-9]+]]:gpr32 = COPY [[COPY]]
  ; CHECK:   TBNZW [[COPY1]], 3, %bb.1
  ; CHECK:   B %bb.0
  ; CHECK: bb.1:
  ; CHECK:   RET_ReallyLR
  bb.0:
    successors: %bb.0, %bb.1
    liveins: $x0
    %copy:gpr(s64) = COPY $x0
    %bit:gpr(s32) = G_CONSTANT i32 8
    %zero:gpr(s32) = G_CONSTANT i32 0
    %fold_me:gpr(s32) = G_TRUNC %copy(s64)
    %and:gpr(s32) = G_AND %fold_me, %bit
    %cmp:gpr(s32) = G_ICMP intpred(ne), %and(s32), %zero
    G_BRCOND %cmp, %bb.1
    G_BR %bb.0
  bb.1:
    RET_ReallyLR