Subzero: Simplify the constant pools.

src/IceConverter.cpp

Index: src/IceConverter.cpp
diff --git a/src/IceConverter.cpp b/src/IceConverter.cpp
index 3c46496b70e656f0bdd61c6bb9691b3565575791..4682d092587e8f5d57b7458b60db7fa9b0f464b4 100644
--- a/src/IceConverter.cpp
+++ b/src/IceConverter.cpp
@@ -116,15 +116,24 @@ public:
     if (const auto GV = dyn_cast<GlobalValue>(Const)) {
       Ice::GlobalDeclaration *Decl = getConverter().getGlobalDeclaration(GV);
       const Ice::RelocOffsetT Offset = 0;
-      return Ctx->getConstantSym(TypeConverter.getIcePointerType(),
-                                 Offset, Decl->getName(),
+      return Ctx->getConstantSym(Offset, Decl->getName(),
                                  Decl->getSuppressMangling());
     } else if (const auto CI = dyn_cast<ConstantInt>(Const)) {
       Ice::Type Ty = convertToIceType(CI->getType());
-      if (Ty == Ice::IceType_i64) {
-        return Ctx->getConstantInt64(Ty, CI->getSExtValue());
-      } else {
-        return Ctx->getConstantInt32(Ty, CI->getSExtValue());
+      switch (Ty) {
+      default:
+        llvm_unreachable("Unhandled constant integer type");
+        return nullptr;
+      case Ice::IceType_i1:
+        return Ctx->getConstantInt1(CI->getSExtValue());
+      case Ice::IceType_i8:
+        return Ctx->getConstantInt8(CI->getSExtValue());
+      case Ice::IceType_i16:
+        return Ctx->getConstantInt16(CI->getSExtValue());
+      case Ice::IceType_i32:
+        return Ctx->getConstantInt32(CI->getSExtValue());
+      case Ice::IceType_i64:
+        return Ctx->getConstantInt64(CI->getSExtValue());
       }
     } else if (const auto CFP = dyn_cast<ConstantFP>(Const)) {
       Ice::Type Type = convertToIceType(CFP->getType());