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Use assertions to check for conditions that should never happen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62178 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -104,8 +104,7 @@ bool SimpleRegisterCoalescing::AdjustCopiesBackFrom(LiveInterval &IntA,
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// BValNo is a value number in B that is defined by a copy from A. 'B3' in
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// the example above.
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LiveInterval::iterator BLR = IntB.FindLiveRangeContaining(CopyIdx);
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if (BLR == IntB.end()) // Should never happen!
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return false;
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assert(BLR != IntB.end() && "Live range not found!");
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VNInfo *BValNo = BLR->valno;
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// Get the location that B is defined at. Two options: either this value has
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@ -116,8 +115,7 @@ bool SimpleRegisterCoalescing::AdjustCopiesBackFrom(LiveInterval &IntA,
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// AValNo is the value number in A that defines the copy, A3 in the example.
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LiveInterval::iterator ALR = IntA.FindLiveRangeContaining(CopyIdx-1);
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if (ALR == IntA.end()) // Should never happen!
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return false;
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assert(ALR != IntA.end() && "Live range not found!");
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VNInfo *AValNo = ALR->valno;
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// If it's re-defined by an early clobber somewhere in the live range, then
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// it's not safe to eliminate the copy. FIXME: This is a temporary workaround.
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@ -153,8 +151,7 @@ bool SimpleRegisterCoalescing::AdjustCopiesBackFrom(LiveInterval &IntA,
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// Get the LiveRange in IntB that this value number starts with.
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LiveInterval::iterator ValLR = IntB.FindLiveRangeContaining(AValNo->def-1);
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if (ValLR == IntB.end()) // Should never happen!
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return false;
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assert(ValLR != IntB.end() && "Live range not found!");
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// Make sure that the end of the live range is inside the same block as
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// CopyMI.
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@ -288,8 +285,7 @@ bool SimpleRegisterCoalescing::RemoveCopyByCommutingDef(LiveInterval &IntA,
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// BValNo is a value number in B that is defined by a copy from A. 'B3' in
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// the example above.
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LiveInterval::iterator BLR = IntB.FindLiveRangeContaining(CopyIdx);
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if (BLR == IntB.end()) // Should never happen!
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return false;
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assert(BLR != IntB.end() && "Live range not found!");
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VNInfo *BValNo = BLR->valno;
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// Get the location that B is defined at. Two options: either this value has
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@ -300,8 +296,7 @@ bool SimpleRegisterCoalescing::RemoveCopyByCommutingDef(LiveInterval &IntA,
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// AValNo is the value number in A that defines the copy, A3 in the example.
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LiveInterval::iterator ALR = IntA.FindLiveRangeContaining(CopyIdx-1);
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if (ALR == IntA.end()) // Should never happen!
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return false;
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assert(ALR != IntA.end() && "Live range not found!");
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VNInfo *AValNo = ALR->valno;
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// If other defs can reach uses of this def, then it's not safe to perform
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// the optimization.
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@ -462,8 +457,7 @@ bool SimpleRegisterCoalescing::ReMaterializeTrivialDef(LiveInterval &SrcInt,
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MachineInstr *CopyMI) {
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unsigned CopyIdx = li_->getUseIndex(li_->getInstructionIndex(CopyMI));
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LiveInterval::iterator SrcLR = SrcInt.FindLiveRangeContaining(CopyIdx);
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if (SrcLR == SrcInt.end()) // Should never happen!
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return false;
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assert(SrcLR != SrcInt.end() && "Live range not found!");
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VNInfo *ValNo = SrcLR->valno;
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// If other defs can reach uses of this def, then it's not safe to perform
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// the optimization.
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