Fix physical register liveness calculations:
+ Take account of clobbers
+ Give outputs priority over inputs since they happen later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168360 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineInstrBundle.cpp b/lib/CodeGen/MachineInstrBundle.cpp
index 1f7fbfc..70f97de 100644
--- a/lib/CodeGen/MachineInstrBundle.cpp
+++ b/lib/CodeGen/MachineInstrBundle.cpp
@@ -281,7 +281,7 @@
MachineOperandIteratorBase::analyzePhysReg(unsigned Reg,
const TargetRegisterInfo *TRI) {
bool AllDefsDead = true;
- PhysRegInfo PRI = {false, false, false, false, false, false, false};
+ PhysRegInfo PRI = {false, false, false, false, false, false};
assert(TargetRegisterInfo::isPhysicalRegister(Reg) &&
"analyzePhysReg not given a physical register!");
@@ -305,7 +305,9 @@
// Reg or a super-reg is read, and perhaps killed also.
PRI.Reads = true;
PRI.Kills = MO.isKill();
- } if (IsRegOrOverlapping && MO.readsReg()) {
+ }
+
+ if (IsRegOrOverlapping && MO.readsReg()) {
PRI.ReadsOverlap = true;// Reg or an overlapping register is read.
}