Make PPCInstrInfo::isPredicated always return false
Because of how predication in implemented on PPC (only for branches), I think
that this is the right thing to do. No functionality change intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179252 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index c967457..ccd1247 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -900,22 +900,14 @@
bool PPCInstrInfo::isPredicated(const MachineInstr *MI) const {
- unsigned OpC = MI->getOpcode();
- switch (OpC) {
- default:
- return false;
- case PPC::BCC:
- case PPC::BCCTR:
- case PPC::BCCTR8:
- case PPC::BCCTRL:
- case PPC::BCCTRL8:
- case PPC::BCLR:
- case PPC::BDZLR:
- case PPC::BDZLR8:
- case PPC::BDNZLR:
- case PPC::BDNZLR8:
- return true;
- }
+ // The predicated branches are identified by their type, not really by the
+ // explicit presence of a predicate. Furthermore, some of them can be
+ // predicated more than once. Because if conversion won't try to predicate
+ // any instruction which already claims to be predicated (by returning true
+ // here), always return false. In doing so, we let isPredicable() be the
+ // final word on whether not the instruction can be (further) predicated.
+
+ return false;
}
bool PPCInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {