File: machine-sink-kill-flags.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (29 lines) | stat: -rw-r--r-- 939 bytes parent folder | download | duplicates (17) 
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
 
; RUN: llc %s -o - -fast-isel=true -O1 -verify-machineinstrs | FileCheck %s

target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios8.0.0"

; The machine verifier was asserting on this test because the AND instruction was
; sunk below the test which killed %tmp340.
; The kill flags on the test had to be cleared because the AND was going to read
; registers in a BB after the test instruction.

; CHECK: %bb343
; CHECK: and

define i32 @test(i32* %ptr) {
bb:
  br label %.thread

.thread:                                          ; preds = %.thread, %bb
  %loc = phi i32 [ %next_iter, %.thread ], [ 0, %bb ]
  %next_iter = lshr i32 %loc, 1
  %tmp340 = sub i32 %loc, 1
  %tmp341 = and i32 %tmp340, 1
  %tmp342 = icmp eq i32 %tmp341, 0
  br i1 %tmp342, label %bb343, label %.thread

bb343:                                            ; preds = %.thread
  store i32 %tmp341, i32* %ptr, align 4
  ret i32 -1
}