- Two minor improvements to the MachineInstr class to reduce footprint and
overhead: Merge 3 parallel vectors into 1, change regsUsed hash_set to be a
bitvector. Sped up LLC a little less than 10% in a debug build!
llvm-svn: 4261
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 02c25fd..df633c6 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -82,14 +82,14 @@
operands[i].markDef();
if (isDefAndUse)
operands[i].markDefAndUse();
- regsUsed.insert(regNum);
+ insertUsedReg(regNum);
}
void
MachineInstr::SetRegForOperand(unsigned i, int regNum)
{
operands[i].setRegForValue(regNum);
- regsUsed.insert(regNum);
+ insertUsedReg(regNum);
}
@@ -111,10 +111,10 @@
// Subsitute implicit refs
for (unsigned i=0, N=implicitRefs.size(); i < N; ++i)
- if (implicitRefs[i] == oldVal)
+ if (getImplicitRef(i) == oldVal)
if (!defsOnly || implicitRefIsDefined(i))
{
- implicitRefs[i] = newVal;
+ implicitRefs[i].Val = newVal;
++numSubst;
}