[SYCL] fix opaque pointer issue in compileTimeProperty alignment (#10748)

update compileTimeProperties pass to check opaque pointers

Author: Brox Chen

llvm/lib/SYCLLowerIR/CompileTimePropertiesPass.cpp

@@ -525,9 +525,10 @@ void CompileTimePropertiesPass::parseAlignmentAndApply(
   // Get the global variable with the annotation string.
   const GlobalVariable *AnnotStrArgGV = nullptr;
   const Value *IntrAnnotStringArg = IntrInst->getArgOperand(1);
-  if (auto *GEP = dyn_cast<GEPOperator>(IntrAnnotStringArg))
-    if (auto *C = dyn_cast<Constant>(GEP->getOperand(0)))
-      AnnotStrArgGV = dyn_cast<GlobalVariable>(C);
+  if (IntrAnnotStringArg->getType()->isOpaquePointerTy())
+    AnnotStrArgGV = dyn_cast<GlobalVariable>(IntrAnnotStringArg);
+  else if (auto *GEP = dyn_cast<GEPOperator>(IntrAnnotStringArg))
+    AnnotStrArgGV = dyn_cast<GlobalVariable>(GEP->getOperand(0));
   if (!AnnotStrArgGV)
     return;
 

llvm/test/SYCLLowerIR/CompileTimePropertiesPass/sycl-properties-alignment-loadstore.ll

@@ -3,9 +3,6 @@
 ;
 ; Tests the translation of "sycl-alignment" to alignment attributes on load/store
 
-; FIXME: Alignment properties not preserved after testcase was opaquified
-; REQUIRES: TEMPORARY_DISABLED
-
 target triple = "spir64_fpga-unknown-unknown"
 
 %struct.MyIP = type { %class.ann_ptr }