Fix issue due to ignoring return value (#1778)

Signed-off-by: Arvind Sudarsanam <arvind.sudarsanam@intel.com>

Original commit:
KhronosGroup/SPIRV-LLVM-Translator@e06e46d

Author: asudarsa

llvm-spirv/lib/SPIRV/SPIRVUtil.cpp

@@ -472,8 +472,11 @@ bool oclIsBuiltin(StringRef Name, StringRef &DemangledName, bool IsCpp) {
     size_t DemangledNameLenStart = NameSpaceStart + 11;
     size_t Start = Name.find_first_not_of("0123456789", DemangledNameLenStart);
     size_t Len = 0;
-    Name.substr(DemangledNameLenStart, Start - DemangledNameLenStart)
-        .getAsInteger(10, Len);
+    if (Name.substr(DemangledNameLenStart, Start - DemangledNameLenStart)
+            .getAsInteger(10, Len)) {
+      SPIRVDBG(errs() << "Error in extracting integer value");
+      return false;
+    }
     DemangledName = Name.substr(Start, Len);
   } else {
     size_t Start = Name.find_first_not_of("0123456789", 2);

llvm-spirv/lib/SPIRV/SPIRVWriter.cpp

@@ -653,7 +653,12 @@ SPIRVType *LLVMToSPIRVBase::transSPIRVJointMatrixINTELType(
 
   auto ParseInteger = [this](StringRef Postfix) -> ConstantInt * {
     unsigned long long N = 0;
-    consumeUnsignedInteger(Postfix, 10, N);
+    if (consumeUnsignedInteger(Postfix, 10, N)) {
+      BM->getErrorLog().checkError(
+          false, SPIRVEC_InvalidLlvmModule,
+          "TypeJointMatrixINTEL expects integer parameters");
+      return 0;
+    }
     return getUInt32(M, N);
   };
   std::vector<SPIRVValue *> Args;
@@ -2950,17 +2955,17 @@ void processAnnotationString(IntrinsicInst *II, std::string &AnnotationString) {
   auto *StrValTy = StrVal->getType();
   if (StrValTy->isOpaquePointerTy()) {
     StringRef StrRef;
-    getConstantStringInfo(dyn_cast<Constant>(StrVal), StrRef);
-    AnnotationString += StrRef.str();
+    if (getConstantStringInfo(dyn_cast<Constant>(StrVal), StrRef))
+      AnnotationString += StrRef.str();
     if (auto *C = dyn_cast_or_null<Constant>(II->getArgOperand(4)))
       processOptionalAnnotationInfo(C, AnnotationString);
     return;
   }
   if (auto *GEP = dyn_cast<GetElementPtrInst>(StrVal)) {
     if (auto *C = dyn_cast<Constant>(GEP->getOperand(0))) {
       StringRef StrRef;
-      getConstantStringInfo(C, StrRef);
-      AnnotationString += StrRef.str();
+      if (getConstantStringInfo(C, StrRef))
+        AnnotationString += StrRef.str();
     }
   }
   if (auto *Cast = dyn_cast<BitCastInst>(II->getArgOperand(4)))
@@ -3885,7 +3890,8 @@ SPIRVValue *LLVMToSPIRVBase::transIntrinsicInst(IntrinsicInst *II,
       return nullptr;
     Constant *C = cast<Constant>(GEP->getOperand(0));
     StringRef AnnotationString;
-    getConstantStringInfo(C, AnnotationString);
+    if (!getConstantStringInfo(C, AnnotationString))
+      return nullptr;
 
     if (AnnotationString == kOCLBuiltinName::FPGARegIntel) {
       if (BM->isAllowedToUseExtension(ExtensionID::SPV_INTEL_fpga_reg))
@@ -4379,7 +4385,10 @@ void LLVMToSPIRVBase::transGlobalAnnotation(GlobalVariable *V) {
         cast<GlobalVariable>(CS->getOperand(1)->stripPointerCasts());
 
     StringRef AnnotationString;
-    getConstantStringInfo(GV, AnnotationString);
+    if (!getConstantStringInfo(GV, AnnotationString)) {
+      assert(!"Annotation string missing");
+      return;
+    }
     DecorationsInfoVec Decorations =
         tryParseAnnotationString(BM, AnnotationString).MemoryAttributesVec;