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Fix a case where LSR is sensitive to debug info.
llvm-svn: 97830
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@ -15,6 +15,7 @@
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#include "llvm/Analysis/ScalarEvolutionExpander.h"
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/ADT/STLExtras.h"
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@ -137,6 +138,10 @@ Value *SCEVExpander::InsertBinop(Instruction::BinaryOps Opcode,
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if (IP != BlockBegin) {
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--IP;
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for (; ScanLimit; --IP, --ScanLimit) {
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// Don't count dbg.value against the ScanLimit, to avoid perturbing the
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// generated code.
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if (isa<DbgInfoIntrinsic>(IP))
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ScanLimit++;
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if (IP->getOpcode() == (unsigned)Opcode && IP->getOperand(0) == LHS &&
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IP->getOperand(1) == RHS)
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return IP;
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@ -505,6 +510,10 @@ Value *SCEVExpander::expandAddToGEP(const SCEV *const *op_begin,
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if (IP != BlockBegin) {
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--IP;
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for (; ScanLimit; --IP, --ScanLimit) {
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// Don't count dbg.value against the ScanLimit, to avoid perturbing the
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// generated code.
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if (isa<DbgInfoIntrinsic>(IP))
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ScanLimit++;
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if (IP->getOpcode() == Instruction::GetElementPtr &&
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IP->getOperand(0) == V && IP->getOperand(1) == Idx)
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return IP;
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