GlobalISel: constrain G_INSERT to inserting just one value per instruction.

It's much easier to reason about single-value inserts and no-one was actually
using the variadic variants before.

llvm-svn: 296923

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
index 41985e3a328..5eea7268c5e 100644
--- a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -456,6 +456,15 @@ MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<unsigned> Res,
   return MIB;
 }
 
+MachineInstrBuilder MachineIRBuilder::buildInsert(unsigned Res, unsigned Src,
+                                                  unsigned Op, unsigned Index) {
+  return buildInstr(TargetOpcode::G_INSERT)
+      .addDef(Res)
+      .addUse(Src)
+      .addUse(Op)
+      .addImm(Index);
+}
+
 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
                                                      unsigned Res,
                                                      bool HasSideEffects) {