/// For copy B = A in BB2, if A is defined by A = B in BB0 which is a
/// predecessor of BB2, and if B is not redefined on the way from A = B
-/// in BB2 to B = A in BB2, B = A in BB2 is partially redundant if the
+/// in BB0 to B = A in BB2, B = A in BB2 is partially redundant if the
/// execution goes through the path from BB0 to BB2. We may move B = A
/// to the predecessor without such reversed copy.
/// So we will transform the program from:
if (CP.isFlipped()) {
// Physreg is copied into vreg
// %y = COPY %physreg_x
- // ... //< no other def of %x here
+ // ... //< no other def of %physreg_x here
// use %y
// =>
// ...
- // use %x
+ // use %physreg_x
CopyMI = MRI->getVRegDef(SrcReg);
} else {
// VReg is copied into physreg:
// %y = def
- // ... //< no other def or use of %y here
- // %y = COPY %physreg_x
+ // ... //< no other def or use of %physreg_x here
+ // %physreg_x = COPY %y
// =>
- // %y = def
+ // %physreg_x = def
// ...
if (!MRI->hasOneNonDBGUse(SrcReg)) {
LLVM_DEBUG(dbgs() << "\t\tMultiple vreg uses!\n");