GlobalISel: implement legalization pass, with just one transformation.

This adds the actual MachineLegalizeHelper to do the work and a trivial pass
wrapper that legalizes all instructions in a MachineFunction. Currently the
only transformation supported is splitting up a vector G_ADD into one acting on
smaller vectors.

llvm-svn: 276461

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index b2d4e1144c7..9affa2e003d 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -315,6 +315,7 @@ public:
   bool addInstSelector() override;
 #ifdef LLVM_BUILD_GLOBAL_ISEL
   bool addIRTranslator() override;
+  bool addLegalizeMachineIR() override;
   bool addRegBankSelect() override;
 #endif
   void addFastRegAlloc(FunctionPass *RegAllocPass) override;
@@ -520,6 +521,10 @@ bool GCNPassConfig::addIRTranslator() {
   return false;
 }
 
+bool GCNPassConfig::addLegalizeMachineIR() {
+  return false;
+}
+
 bool GCNPassConfig::addRegBankSelect() {
   return false;
 }