File: MachineSink-implicit-x0.mir

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (33 lines) | stat: -rw-r--r-- 935 bytes parent folder | download | duplicates (13) 
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
 
# RUN: llc -mtriple=riscv32 %s -run-pass=machine-sink -o - | FileCheck %s

# Verify that sinking of '%20:gpr = LUI 1, implicit $x0' is not inhibited by
# the implicit use of '$x0'.
# Register '$x0' is a 'MRI->isConstantPhysReg()' on RISCV and such uses should
# not inhibit sinking transformation even though they are livein to the block
# they are to be sunk into (inhibit under such conditions should only happen
# for defines).

---
name:            f
tracksRegLiveness: true
body:             |
  ; CHECK-LABEL: bb.1:
  ; CHECK-NEXT:   successors: %bb.3(0x80000000)
  ; CHECK-NEXT:   liveins: $x0
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[LUI:%[0-9]+]]:gpr = LUI 1, implicit $x0
  bb.0:
    liveins: $x10
    %10:gpr = COPY $x10
    %20:gpr = LUI 1, implicit $x0
    BEQ %10, %10, %bb.2
    PseudoBR %bb.1
  bb.1:
    liveins: $x0
    %30:gpr = ADDI %20, 5
    PseudoBR %bb.3
  bb.2:
    PseudoBR %bb.3
  bb.3:
    PseudoRET
...