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Fix a bug where a def use operand isn't being detected as a sub-register use. 

llvm-svn: 43763
This commit is contained in:
Evan Cheng 2007-11-06 08:50:44 +00:00
parent 2dbffa4e76
commit 92d23e5204
1 changed files with 7 additions and 4 deletions
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11
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -19,7 +19,6 @@
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "VirtRegMap.h"
#include "llvm/Value.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
@ -57,7 +56,6 @@ void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addPreservedID(PHIEliminationID);
AU.addRequiredID(PHIEliminationID);
AU.addRequiredID(TwoAddressInstructionPassID);
AU.addRequired<LoopInfo>();
MachineFunctionPass::getAnalysisUsage(AU);
}
@ -378,8 +376,13 @@ addIntervalsForSpills(const LiveInterval &li, VirtRegMap &vrm, unsigned reg) {
bool HasUse = mop.isUse();
bool HasDef = mop.isDef();
for (unsigned j = i+1, e = MI->getNumOperands(); j != e; ++j) {
if (MI->getOperand(j).isRegister() &&
MI->getOperand(j).getReg() == li.reg) {
if (!MI->getOperand(j).isRegister())
continue;
unsigned RegJ = MI->getOperand(j).getReg();
if (RegJ != 0 && MRegisterInfo::isVirtualRegister(RegJ) &&
RegMap->isSubRegister(RegJ))
RegJ = RegMap->getSuperRegister(RegJ);
if (RegJ == li.reg) {
MI->getOperand(j).setReg(NewVReg);
HasUse |= MI->getOperand(j).isUse();
HasDef |= MI->getOperand(j).isDef();