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Clean up static analyzer warnings.

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Clang's static analyzer found several potential cases of undefined
behavior, use of un-initialized values, and potentially null pointer
dereferences in tablegen, Support, MC, and ADT. This cleans them up
with specific assertions on the assumptions of the code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224154 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Ilseman
2014-12-12 21:48:03 +00:00
parent 5271cab7c9
commit 3f0e8837be
11 changed files with 24 additions and 12 deletions
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utils/TableGen/CodeGenInstruction.cpp
+1 -1
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@@ -537,7 +537,7 @@ bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo,
// If both are Operands with the same MVT, allow the conversion. It's
// up to the user to make sure the values are appropriate, just like
// for isel Pat's.
if (InstOpRec->isSubClassOf("Operand") &&
if (InstOpRec->isSubClassOf("Operand") && ADI &&
ADI->getDef()->isSubClassOf("Operand")) {
// FIXME: What other attributes should we check here? Identical
// MIOperandInfo perhaps?