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Handle register masks in branch folding.

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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
This commit is contained in:
Jakob Stoklund Olesen 2012-02-15 23:42:54 +00:00
parent e746186ed4
commit a230262791
1 changed files with 8 additions and 0 deletions
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8
lib/CodeGen/BranchFolding.cpp
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@ -1477,6 +1477,9 @@ MachineBasicBlock::iterator findHoistingInsertPosAndDeps(MachineBasicBlock *MBB,
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 BranchFolder::HoistCommonCodeInSuccs(MachineBasicBlock *MBB) {
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();