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Add more thorough error checking for NULL register classes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46605 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Christopher Lamb 2008-01-31 07:09:08 +00:00
parent c67aa7cbd5
commit 175e81598a
1 changed files with 2 additions and 1 deletions
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3
lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
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@ -597,10 +597,11 @@ void ScheduleDAG::EmitSubregNode(SDNode *Node,
// Grab the destination register
const TargetRegisterClass *DRC = 0;
DRC = RegInfo.getRegClass(VRBase);
assert(SRC == DRC &&
assert(SRC && DRC && SRC == DRC &&
"Source subregister and destination must have the same class");
} else {
// Create the reg
assert(SRC && "Couldn't find source register class");
VRBase = RegInfo.createVirtualRegister(SRC);
}