implement the BlockHasNoFallThrough hook
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31264 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 6318846..9876e3c 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -259,6 +259,17 @@
BuildMI(&MBB, PPC::B, 1).addMBB(FBB);
}
+bool PPCInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
+ if (MBB.empty()) return false;
+
+ switch (MBB.back().getOpcode()) {
+ case PPC::B: // Uncond branch.
+ case PPC::BCTR: // Indirect branch.
+ return true;
+ default: return false;
+ }
+}
+
bool PPCInstrInfo::
ReverseBranchCondition(std::vector<MachineOperand> &Cond) const {
assert(Cond.size() == 2 && "Invalid PPC branch opcode!");