GlobalISel: support translating select instructions.

llvm-svn: 279309

2 files changed, 17 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 3c1807fbd2e..58235c2b823 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -236,6 +236,13 @@ bool IRTranslator::translateInsertValue(const User &U) {
   return true;
 }
 
+bool IRTranslator::translateSelect(const User &U) {
+  MIRBuilder.buildSelect(
+      LLT{*U.getType()}, getOrCreateVReg(U), getOrCreateVReg(*U.getOperand(0)),
+      getOrCreateVReg(*U.getOperand(1)), getOrCreateVReg(*U.getOperand(2)));
+  return true;
+}
+
 bool IRTranslator::translateBitCast(const User &U) {
   if (LLT{*U.getOperand(0)->getType()} == LLT{*U.getType()}) {
     unsigned &Reg = ValToVReg[&U];
diff --git a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
index bd66a28bdc2..0d2fae659e8 100644
--- a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -216,3 +216,13 @@ MachineInstrBuilder MachineIRBuilder::buildICmp(ArrayRef<LLT> Tys,
       .addUse(Op0)
       .addUse(Op1);
 }
+
+MachineInstrBuilder MachineIRBuilder::buildSelect(LLT Ty, unsigned Res,
+                                                  unsigned Tst,
+                                                  unsigned Op0, unsigned Op1) {
+  return buildInstr(TargetOpcode::G_SELECT, {Ty, LLT::scalar(1)})
+      .addDef(Res)
+      .addUse(Tst)
+      .addUse(Op0)
+      .addUse(Op1);
+}