FEAT:

Add support for the intrinsic @llvm.fptosi.sat.* and @llvm.fptoui.sat.*
- add legalizer for G_FPTOSI_SAT and G_FPTOUI_SAT
- add instructionSelector for G_FPTOSI_SAT and G_FPTOUI_SAT
- add function to add saturatedConversion decoration to the intrinsic

Author: VishMCW

llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp

@@ -1367,6 +1367,24 @@ static void createSaturatedConversionDecoration(Instruction *I,
   createDecorationIntrinsic(I, SaturatedConversionNode, B);
 }
 
+static void addSaturatedDecorationToIntrinsic(Instruction *I, IRBuilder<> &B) {
+  if (auto *CI = dyn_cast<CallInst>(I)) {
+    if (Function *Fu = CI->getCalledFunction()) {
+      if (Fu->isIntrinsic()) {
+        unsigned const int IntrinsicId = Fu->getIntrinsicID();
+        switch (IntrinsicId) {
+        case Intrinsic::fptosi_sat:
+        case Intrinsic::fptoui_sat:
+          createSaturatedConversionDecoration(I, B);
+          break;
+        default:
+          break;
+        }
+      }
+    }
+  }
+}
+
 Instruction *SPIRVEmitIntrinsics::visitCallInst(CallInst &Call) {
   if (!Call.isInlineAsm())
     return &Call;