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Use isTerminator() instead of isBranch()||isReturn() in

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several places. isTerminator() returns true for a superset
of cases, and includes things like FP_REG_KILL, which are
nither return or branch but aren't safe to move/remat/etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61373 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-12-23 17:28:50 +00:00
parent e1dfc7da89
commit 237dee1259
3 changed files with 4 additions and 5 deletions
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2
lib/CodeGen/MachineInstr.cpp
View File

@ -707,7 +707,7 @@ bool MachineInstr::isSafeToMove(const TargetInstrInfo *TII,
SawStore = true;
return false;
}
if (TID->isReturn() || TID->isBranch() || TID->hasUnmodeledSideEffects())
if (TID->isTerminator() || TID->hasUnmodeledSideEffects())
return false;
// See if this instruction does a load. If so, we have to guarantee that the

2
lib/CodeGen/MachineLICM.cpp
View File

@ -205,7 +205,7 @@ bool MachineLICM::IsLoopInvariantInst(MachineInstr &I) {
const TargetInstrDesc &TID = I.getDesc();
// Ignore stuff that we obviously can't hoist.
if (TID.mayStore() || TID.isCall() || TID.isReturn() || TID.isBranch() ||
if (TID.mayStore() || TID.isCall() || TID.isTerminator() ||
TID.hasUnmodeledSideEffects())
return false;

5
lib/CodeGen/ScheduleDAGInstrs.cpp
View File

@ -275,8 +275,7 @@ void ScheduleDAGInstrs::BuildSchedUnits() {
// after stack slots are lowered to actual addresses.
// TODO: Use an AliasAnalysis and do real alias-analysis queries, and
// produce more precise dependence information.
if (TID.isCall() || TID.isReturn() || TID.isBranch() ||
TID.hasUnmodeledSideEffects()) {
if (TID.isCall() || TID.isTerminator() || TID.hasUnmodeledSideEffects()) {
new_chain:
// This is the conservative case. Add dependencies on all memory
// references.
@ -300,7 +299,7 @@ void ScheduleDAGInstrs::BuildSchedUnits() {
// See if it is known to just have a single memory reference.
MachineInstr *ChainMI = Chain->getInstr();
const TargetInstrDesc &ChainTID = ChainMI->getDesc();
if (!ChainTID.isCall() && !ChainTID.isReturn() && !ChainTID.isBranch() &&
if (!ChainTID.isCall() && !ChainTID.isTerminator() &&
!ChainTID.hasUnmodeledSideEffects() &&
ChainMI->hasOneMemOperand() &&
!ChainMI->memoperands_begin()->isVolatile() &&