Handle register masks in branch folding.
Don't attempt to move instructions with regmask operands. They are most
likely calls anyway.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150634 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index 4929e388..6aa170b 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -1477,6 +1477,9 @@
bool IsDef = false;
for (unsigned i = 0, e = PI->getNumOperands(); !IsDef && i != e; ++i) {
const MachineOperand &MO = PI->getOperand(i);
+ // If PI has a regmask operand, it is probably a call. Separate away.
+ if (MO.isRegMask())
+ return Loc;
if (!MO.isReg() || MO.isUse())
continue;
unsigned Reg = MO.getReg();
@@ -1589,6 +1592,11 @@
bool IsSafe = true;
for (unsigned i = 0, e = TIB->getNumOperands(); i != e; ++i) {
MachineOperand &MO = TIB->getOperand(i);
+ // Don't attempt to hoist instructions with register masks.
+ if (MO.isRegMask()) {
+ IsSafe = false;
+ break;
+ }
if (!MO.isReg())
continue;
unsigned Reg = MO.getReg();