AMDGPU/GlobalISel: legalize and select 32-bit G_SITOFP

Reviewers: arsenm, nhaehnle

Reviewed By: arsenm

Subscribers: kzhuravl, wdng, yaxunl, rovka, kristof.beyls, dstuttard, tpr, t-tye, llvm-commits

Differential Revision: https://reviews.llvm.org/D48195

llvm-svn: 335316
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
index dde8fdc..f98f57e 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
@@ -537,6 +537,7 @@
   switch (I.getOpcode()) {
   default:
     break;
+  case TargetOpcode::G_SITOFP:
   case TargetOpcode::G_FMUL:
   case TargetOpcode::G_FADD:
   case TargetOpcode::G_FPTOUI:
@@ -582,6 +583,14 @@
       [=](MachineInstrBuilder &MIB) { MIB.addImm(0); }  // omod
   }};
 }
+InstructionSelector::ComplexRendererFns
+AMDGPUInstructionSelector::selectVOP3OMods(MachineOperand &Root) const {
+  return {{
+      [=](MachineInstrBuilder &MIB) { MIB.add(Root); },
+      [=](MachineInstrBuilder &MIB) { MIB.addImm(0); }, // clamp
+      [=](MachineInstrBuilder &MIB) { MIB.addImm(0); }  // omod
+  }};
+}
 
 InstructionSelector::ComplexRendererFns
 AMDGPUInstructionSelector::selectVOP3Mods(MachineOperand &Root) const {