[GlobalISel] Add support for indirectbr
Differential Revision: https://reviews.llvm.org/D28079
llvm-svn: 293470
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 1a667d6..58bd65e 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -252,6 +252,21 @@
return true;
}
+bool IRTranslator::translateIndirectBr(const User &U,
+ MachineIRBuilder &MIRBuilder) {
+ const IndirectBrInst &BrInst = cast<IndirectBrInst>(U);
+
+ const unsigned Tgt = getOrCreateVReg(*BrInst.getAddress());
+ MIRBuilder.buildBrIndirect(Tgt);
+
+ // Link successors.
+ MachineBasicBlock &CurBB = MIRBuilder.getMBB();
+ for (const BasicBlock *Succ : BrInst.successors())
+ CurBB.addSuccessor(&getOrCreateBB(*Succ));
+
+ return true;
+}
+
bool IRTranslator::translateLoad(const User &U, MachineIRBuilder &MIRBuilder) {
const LoadInst &LI = cast<LoadInst>(U);
diff --git a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
index ae1550d..0145726 100644
--- a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -217,6 +217,10 @@
return buildInstr(TargetOpcode::G_BR).addMBB(&Dest);
}
+MachineInstrBuilder MachineIRBuilder::buildBrIndirect(unsigned Tgt) {
+ return buildInstr(TargetOpcode::G_BRINDIRECT).addUse(Tgt);
+}
+
MachineInstrBuilder MachineIRBuilder::buildCopy(unsigned Res, unsigned Op) {
return buildInstr(TargetOpcode::COPY).addDef(Res).addUse(Op);
}