mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-25 00:29:20 +00:00
Fix PR14034, an infloop / heap corruption / crash bug in the new SROA.
Thanks to Benjamin for the raw test case. This one took about 50 times longer to reduce than to fix. =/ git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165476 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
03753aa759
commit
2fdb25b5a9
@ -1786,6 +1786,8 @@ static Value *getNaturalGEPWithType(IRBuilder<> &IRB, const DataLayout &TD,
|
||||
ElementTy = SeqTy->getElementType();
|
||||
Indices.push_back(IRB.getInt(APInt(TD.getPointerSizeInBits(), 0)));
|
||||
} else if (StructType *STy = dyn_cast<StructType>(ElementTy)) {
|
||||
if (STy->element_begin() == STy->element_end())
|
||||
break; // Nothing left to descend into.
|
||||
ElementTy = *STy->element_begin();
|
||||
Indices.push_back(IRB.getInt32(0));
|
||||
} else {
|
||||
|
@ -948,3 +948,23 @@ entry:
|
||||
ret double %ret
|
||||
; CHECK: ret double %x
|
||||
}
|
||||
|
||||
%PR14034.struct = type { { {} }, i32, %PR14034.list }
|
||||
%PR14034.list = type { %PR14034.list*, %PR14034.list* }
|
||||
|
||||
define void @PR14034() {
|
||||
; This test case tries to form GEPs into the empty leading struct members, and
|
||||
; subsequently crashed (under valgrind) before we fixed the PR. The important
|
||||
; thing is to handle empty structs gracefully.
|
||||
; CHECK: @PR14034
|
||||
|
||||
entry:
|
||||
%a = alloca %PR14034.struct
|
||||
%list = getelementptr %PR14034.struct* %a, i32 0, i32 2
|
||||
%prev = getelementptr %PR14034.list* %list, i32 0, i32 1
|
||||
store %PR14034.list* undef, %PR14034.list** %prev
|
||||
%cast0 = bitcast %PR14034.struct* undef to i8*
|
||||
%cast1 = bitcast %PR14034.struct* %a to i8*
|
||||
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %cast0, i8* %cast1, i32 12, i32 0, i1 false)
|
||||
ret void
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user