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There is not any need to copy metadata while merging modules.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80941 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-09-03 20:35:57 +00:00
parent 8d44b28bc6
commit faf8fa5664
3 changed files with 57 additions and 8 deletions
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10
lib/Linker/LinkModules.cpp
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@ -395,14 +395,8 @@ static Value *RemapOperand(const Value *In,
assert(!isa<GlobalValue>(CPV) && "Unmapped global?");
llvm_unreachable("Unknown type of derived type constant value!");
}
} else if (const MDNode *N = dyn_cast<MDNode>(In)) {
std::vector<Value*> Elems;
for (unsigned i = 0, e = N->getNumElements(); i !=e; ++i)
Elems.push_back(RemapOperand(N->getElement(i), ValueMap, Context));
if (!Elems.empty())
Result = MDNode::get(Context, &Elems[0], Elems.size());
} else if (const MDString *MDS = dyn_cast<MDString>(In)) {
Result = MDString::get(Context, MDS->getString());
} else if (isa<MetadataBase>(In)) {
Result = const_cast<Value*>(In);
} else if (isa<InlineAsm>(In)) {
Result = const_cast<Value*>(In);
}

30
test/Linker/2009-09-03-mdnode.ll Normal file
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@ -0,0 +1,30 @@
; RUN: llvm-as < %s > %t.bc
; RUN: llvm-as < %p/2009-09-03-mdnode2.ll > %t2.bc
; RUN: llvm-link %t.bc %t2.bc
declare void @f() nounwind
define i32 @main(...) nounwind {
entry:
%retval = alloca i32 ; <i32*> [#uses=2]
call void @llvm.dbg.func.start(metadata !0)
store i32 0, i32* %retval
call void @llvm.dbg.stoppoint(i32 4, i32 5, metadata !1)
call void @f()
br label %return
return: ; preds = %entry
%0 = load i32* %retval ; <i32> [#uses=1]
call void @llvm.dbg.stoppoint(i32 5, i32 1, metadata !1)
call void @llvm.dbg.region.end(metadata !0)
ret i32 %0
}
declare void @llvm.dbg.func.start(metadata) nounwind readnone
declare void @llvm.dbg.stoppoint(i32, i32, metadata) nounwind readnone
declare void @llvm.dbg.region.end(metadata) nounwind readnone
!0 = metadata !{i32 458798, i32 0, metadata !1, metadata !"main", metadata !"main", metadata !"main", metadata !1, i32 2, null, i1 false, i1 true}
!1 = metadata !{i32 458769, i32 0, i32 12, metadata !"a.c", metadata !"/home/rich/ellcc/test/source", metadata !"ellcc 0.1.0", i1 true, i1 true, metadata !"", i32 0}

25
test/Linker/2009-09-03-mdnode2.ll Normal file
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@ -0,0 +1,25 @@
; This file is used by 2009-09-03-mdnode.ll, so it doesn't actually do anything itself
;
; RUN: true
define i32 @f(...) nounwind {
entry:
%retval = alloca i32 ; <i32*> [#uses=1]
call void @llvm.dbg.func.start(metadata !0)
br label %return
return: ; preds = %entry
%0 = load i32* %retval ; <i32> [#uses=1]
call void @llvm.dbg.stoppoint(i32 3, i32 1, metadata !1)
call void @llvm.dbg.region.end(metadata !0)
ret i32 %0
}
declare void @llvm.dbg.func.start(metadata) nounwind readnone
declare void @llvm.dbg.stoppoint(i32, i32, metadata) nounwind readnone
declare void @llvm.dbg.region.end(metadata) nounwind readnone
!0 = metadata !{i32 458798, i32 0, metadata !1, metadata !"f", metadata !"f", metadata !"f", metadata !1, i32 1, null, i1 false, i1 true}
!1 = metadata !{i32 458769, i32 0, i32 12, metadata !"b.c", metadata !"/home/rich/ellcc/test/source", metadata !"ellcc 0.1.0", i1 true, i1 true, metadata !"", i32 0}