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When an instruction like: A += B had both A and B virtual registers

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spilled, A was loaded from its stack location twice. This fixes the bug.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11093 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos
2004-02-03 01:13:07 +00:00
parent 9fe7602862
commit 4e7854407c
3 changed files with 30 additions and 10 deletions
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lib/CodeGen/MachineInstr.cpp
+18
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@@ -27,6 +27,24 @@ namespace llvm {
//
extern const TargetInstrDescriptor *TargetInstrDescriptors;
bool MachineOperand::isEverUsed(const MachineInstr& mi) const
{
for (int i = 0, e = mi.getNumOperands(); i != e; ++i) {
if (*this == mi.getOperand(i) && mi.getOperand(i).isUse())
return true;
}
return false;
}
bool MachineOperand::isEverDefined(const MachineInstr& mi) const
{
for (int i = 0, e = mi.getNumOperands(); i != e; ++i) {
if (*this == mi.getOperand(i) && mi.getOperand(i).isDef())
return true;
}
return false;
}
// Constructor for instructions with variable #operands
MachineInstr::MachineInstr(MachineOpCode OpCode, unsigned numOperands)
: opCode(OpCode),