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[Debug Info] remove DITrivialType and use null to represent unspecified param.

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Per feedback on r214111, we are going to use null to represent unspecified
parameter. If the type array is {null}, it means a function that returns void;
If the type array is {null, null}, it means a variadic function that returns
void. In summary if we have more than one element in the type array and the last
element is null, it is a variadic function.

rdar://17628609


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214189 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren
2014-07-29 18:20:39 +00:00
parent 52f23be080
commit 23ab342d96
7 changed files with 22 additions and 71 deletions
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8
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -469,11 +469,13 @@ DIE *DwarfDebug::createScopeChildrenDIE(
// If this is a variadic function, add an unspecified parameter.
DISubprogram SP(Scope->getScopeNode());
DITypeArray FnArgs = SP.getType().getTypeArray();
if (resolve(FnArgs.getElement(FnArgs.getNumElements() - 1))
.isUnspecifiedParameter()) {
// If we have a single element of null, it is a function that returns void.
// If we have more than one elements and the last one is null, it is a
// variadic function.
if (FnArgs.getNumElements() > 1 &&
!resolve(FnArgs.getElement(FnArgs.getNumElements() - 1)))
Children.push_back(
make_unique<DIE>(dwarf::DW_TAG_unspecified_parameters));
}
}
// Collect lexical scope children first.