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Assert on SSA errors in LiveVariables.

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All uses of a virtual register must be dominated by its def.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152449 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-03-09 23:41:44 +00:00
parent 6e1beea6bf
commit 9ab3dbe617
1 changed files with 1 additions and 0 deletions
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lib/CodeGen/LiveVariables.cpp
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@@ -109,6 +109,7 @@ void LiveVariables::MarkVirtRegAliveInBlock(VarInfo& VRInfo,
// Mark the variable known alive in this bb // Mark the variable known alive in this bb
VRInfo.AliveBlocks.set(BBNum); VRInfo.AliveBlocks.set(BBNum);
assert(MBB != &MF->front() && "Can't find reaching def for virtreg");
WorkList.insert(WorkList.end(), MBB->pred_rbegin(), MBB->pred_rend()); WorkList.insert(WorkList.end(), MBB->pred_rbegin(), MBB->pred_rend());
} }