Differential D3373 Diff 12002 lib/CodeGen/AsmPrinter/DbgValueHistoryCalculator.cpp

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lib/CodeGen/AsmPrinter/DbgValueHistoryCalculator.cpp

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	#include "llvm/ADT/SmallVector.h"	#include "llvm/ADT/SmallVector.h"
	#include "llvm/CodeGen/MachineBasicBlock.h"	#include "llvm/CodeGen/MachineBasicBlock.h"
	#include "llvm/CodeGen/MachineFunction.h"	#include "llvm/CodeGen/MachineFunction.h"
		#include "llvm/IR/DebugInfo.h"
	#include "llvm/Support/Debug.h"	#include "llvm/Support/Debug.h"
	#include "llvm/Target/TargetRegisterInfo.h"	#include "llvm/Target/TargetRegisterInfo.h"
	#include <algorithm>	#include <algorithm>
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	const MachineInstr &MI) {	const MachineInstr &MI) {
	// Instruction range should start with a DBG_VALUE instruction for the	// Instruction range should start with a DBG_VALUE instruction for the
	// variable.	// variable.
	assert(MI.isDebugValue() && MI.getDebugVariable() == Var);	assert(MI.isDebugValue() && getEntireVariable(MI.getDebugVariable()) == Var);
	auto &Ranges = VarInstrRanges[Var];	auto &Ranges = VarInstrRanges[Var];
	if (!Ranges.empty() && Ranges.back().second == nullptr &&	if (!Ranges.empty() && Ranges.back().second == nullptr &&
	Ranges.back().first->isIdenticalTo(&MI)) {	Ranges.back().first->isIdenticalTo(&MI)) {
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	}	}

	assert(MI.getNumOperands() > 1 && "Invalid DBG_VALUE instruction!");	assert(MI.getNumOperands() > 1 && "Invalid DBG_VALUE instruction!");
	const MDNode *Var = MI.getDebugVariable();	// Use the base variable (without any DW_OP_piece expressions)
		// as index into History. The full variables including the
		// piece expressions are attached to the MI.
		DIVariable Var = getEntireVariable(MI.getDebugVariable());

	if (unsigned PrevReg = Result.getRegisterForVar(Var))	if (unsigned PrevReg = Result.getRegisterForVar(Var))
	dropRegDescribedVar(RegVars, PrevReg, Var);	dropRegDescribedVar(RegVars, PrevReg, Var);
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