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Fix the updating of the machine CFG when a PHI node was in a successor of

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the jump table's range check block.  This re-enables 100% dense jump tables
by default on PPC & x86


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27952 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman
2006-04-23 06:26:20 +00:00
parent 84bfed087b
commit 9453eea49b
2 changed files with 16 additions and 8 deletions
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9
include/llvm/CodeGen/SelectionDAGISel.h
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@@ -41,7 +41,7 @@ public:
SelectionDAG *CurDAG;
MachineBasicBlock *BB;
SelectionDAGISel(TargetLowering &tli) : TLI(tli), JT(0,0,0) {}
SelectionDAGISel(TargetLowering &tli) : TLI(tli), JT(0,0,0,0) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
@@ -89,8 +89,8 @@ public:
MachineBasicBlock *ThisBB;
};
struct JumpTable {
JumpTable(unsigned R, unsigned J, MachineBasicBlock *me) : Reg(R), JTI(J),
MBB(me) {}
JumpTable(unsigned R, unsigned J, MachineBasicBlock *M,
MachineBasicBlock *D) : Reg(R), JTI(J), MBB(M), Default(D) {}
// Reg - the virtual register containing the index of the jump table entry
// to jump to.
unsigned Reg;
@@ -98,6 +98,9 @@ public:
unsigned JTI;
// MBB - the MBB into which to emit the code for the indirect jump.
MachineBasicBlock *MBB;
// Default - the MBB of the default bb, which is a successor of the range
// check MBB. This is when updating PHI nodes in successors.
MachineBasicBlock *Default;
// SuccMBBs - a vector of unique successor MBBs used for updating CFG info
// and PHI nodes.
std::set<MachineBasicBlock*> SuccMBBs;