File: redundant-copy-elim-empty-mbb.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (29 lines) | stat: -rw-r--r-- 814 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
 
; RUN: llc < %s | FileCheck %s
; Make sure we don't crash in AArch64RedundantCopyElimination when a
; MachineBasicBlock is empty.  PR29035.

target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-linux-gnu"

declare i8* @bar()

; CHECK-LABEL: foo:
; CHECK: tbz
; CHECK: mov{{.*}}, #1
; CHECK: ret
; CHECK: bl bar
; CHECK: cbnz
; CHECK: ret
define i1 @foo(i1 %start) {
entry:
  br i1 %start, label %cleanup, label %if.end

if.end:                                           ; preds = %if.end, %entry
  %call = tail call i8* @bar()
  %cmp = icmp eq i8* %call, null
  br i1 %cmp, label %cleanup, label %if.end

cleanup:                                          ; preds = %if.end, %entry
  %retval.0 = phi i1 [ true, %entry ], [ false, %if.end ]
  ret i1 %retval.0
}