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call void @llvm.dbg.declare(metadata !{i32* null}, metadata !1)

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is valid, but not useful, when variable  identified by !1 is optimized away by the optimizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98986 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-03-19 21:06:24 +00:00
parent 5a12971246
commit 608f5a6d48
2 changed files with 12 additions and 4 deletions
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4
lib/VMCore/Verifier.cpp
View File

@ -1623,10 +1623,6 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
MDNode *MD = cast<MDNode>(CI.getOperand(1));
Assert1(MD->getNumOperands() == 1,
"invalid llvm.dbg.declare intrinsic call 2", &CI);
if (MD->getOperand(0))
if (Constant *C = dyn_cast<Constant>(MD->getOperand(0)))
Assert1(C && !isa<ConstantPointerNull>(C),
"invalid llvm.dbg.declare intrinsic call 3", &CI);
} break;
case Intrinsic::memcpy:
case Intrinsic::memmove:

12
test/DebugInfo/2010-03-19-DbgDeclare.ll Normal file
View File

@ -0,0 +1,12 @@
; RUN: llvm-as < %s | opt -verify -disable-output
define void @Foo(i32 %a, i32 %b) {
entry:
call void @llvm.dbg.declare(metadata !{i32* null}, metadata !1)
ret void
}
!0 = metadata !{i32 662302, i32 26, metadata !1, null}
!1 = metadata !{i32 4, metadata !"foo"}
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone