mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 19:12:56 +02:00
1eab5ae9ea
Remove an unnecessary round-trip:
iterator => operator->() => getIterator()
In some cases, the iterator is end(), so the dereference of operator->
is invalid (UB).
The testcase only crashes with r278974 (currently reverted to
investigate this), which adds an assertion for invalid dereferences of
ilist nodes.
Fixes PR29035.
llvm-svn: 279104
30 lines
804 B
LLVM
30 lines
804 B
LLVM
; 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: orr
|
|
; 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
|
|
}
|