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Give a better assertion if we see a use before a def.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16135 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2004-09-01 22:34:52 +00:00
parent 790306852c
commit 2e58a41089
1 changed files with 2 additions and 0 deletions
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lib/CodeGen/LiveVariables.cpp
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@ -82,6 +82,8 @@ void LiveVariables::MarkVirtRegAliveInBlock(VarInfo &VRInfo,
void LiveVariables::HandleVirtRegUse(VarInfo &VRInfo, MachineBasicBlock *MBB,
MachineInstr *MI) {
assert(VRInfo.DefInst && "Register use before def!");
// Check to see if this basic block is already a kill block...
if (!VRInfo.Kills.empty() && VRInfo.Kills.back()->getParent() == MBB) {
// Yes, this register is killed in this basic block already. Increase the