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Reject unrepresentable pointer types in intrinsics. Fixes PR7316.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110541 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2010-08-08 06:12:09 +00:00
parent c98af3370f
commit 1bb580a3aa
2 changed files with 28 additions and 2 deletions
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9
lib/VMCore/Verifier.cpp
View File

@ -1840,8 +1840,13 @@ bool Verifier::PerformTypeCheck(Intrinsic::ID ID, Function *F, const Type *Ty,
// and iPTR. In the verifier, we can not distinguish which case we have so
// allow either case to be legal.
if (const PointerType* PTyp = dyn_cast<PointerType>(Ty)) {
Suffix += ".p" + utostr(PTyp->getAddressSpace()) +
EVT::getEVT(PTyp->getElementType()).getEVTString();
EVT PointeeVT = EVT::getEVT(PTyp->getElementType(), true);
if (PointeeVT == MVT::Other) {
CheckFailed("Intrinsic has pointer to complex type.");
return false;
}
Suffix += ".p" + utostr(PTyp->getAddressSpace()) +
PointeeVT.getEVTString();
} else {
CheckFailed(IntrinsicParam(ArgNo, NumRetVals) + " is not a "
"pointer and a pointer is required.", F);

21
test/Verifier/2010-08-07-PointerIntrinsic.ll Normal file
View File

@ -0,0 +1,21 @@
; RUN: not llvm-as < %s 2> %t
; RUN: grep {Broken module} %t
; PR7316
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:32"
target triple = "x86-unknown-unknown"
@aa = global [32 x i8] zeroinitializer, align 1
@bb = global [16 x i8] zeroinitializer, align 1
define void @x() nounwind {
L.0:
%0 = getelementptr [32 x i8]* @aa, i32 0, i32 4
%1 = bitcast i8* %0 to [16 x i8]*
%2 = bitcast [16 x i8]* %1 to [0 x i8]*
%3 = getelementptr [16 x i8]* @bb
%4 = bitcast [16 x i8]* %3 to [0 x i8]*
call void @llvm.memcpy.i32([0 x i8]* %2, [0 x i8]* %4, i32 16, i32 1)
br label %return
return:
ret void
}
declare void @llvm.memcpy.i32([0 x i8]*, [0 x i8]*, i32, i32) nounwind