Fix ArgumentAttributeINTEL decoration translation after nocapture attribute change (#2983)

Update after llvm/llvm-project@29441e4f5fa5 ("[IR] Convert from
nocapture to captures(none)")

Co-authored-by: Sven van Haastregt <[email protected]>

Original commit:
KhronosGroup/SPIRV-LLVM-Translator@290f13663fe0dfd

Author: vmaksimo

llvm-spirv/lib/SPIRV/SPIRVReader.cpp

@@ -1395,6 +1395,14 @@ void SPIRVToLLVM::transFunctionPointerCallArgumentAttributes(
     std::vector<SPIRVWord> Literals = Dec->getVecLiteral();
     SPIRVWord ArgNo = Literals[0];
     SPIRVWord SpirvAttr = Literals[1];
+    // There is no value to rmap SPIR-V FunctionParameterAttributeNoCapture, as
+    // LLVM does not have Attribute::NoCapture anymore. Adding special handling
+    // for this case.
+    if (SpirvAttr == FunctionParameterAttributeNoCapture) {
+      CI->addParamAttr(ArgNo, Attribute::getWithCaptureInfo(
+                                  CI->getContext(), CaptureInfo::none()));
+      continue;
+    }
     Attribute::AttrKind LlvmAttrKind = SPIRSPIRVFuncParamAttrMap::rmap(
         static_cast<SPIRVFuncParamAttrKind>(SpirvAttr));
     auto LlvmAttr =

llvm-spirv/lib/SPIRV/SPIRVWriter.cpp

@@ -2741,6 +2741,10 @@ bool LLVMToSPIRVBase::shouldTryToAddMemAliasingDecoration(Instruction *Inst) {
 void addFuncPointerCallArgumentAttributes(CallInst *CI,
                                           SPIRVValue *FuncPtrCall) {
   for (unsigned ArgNo = 0; ArgNo < CI->arg_size(); ++ArgNo) {
+    if (CI->doesNotCapture(ArgNo))
+      FuncPtrCall->addDecorate(new SPIRVDecorate(
+          spv::internal::DecorationArgumentAttributeINTEL, FuncPtrCall, ArgNo,
+          FunctionParameterAttributeNoCapture));
     for (const auto &I : CI->getAttributes().getParamAttrs(ArgNo)) {
       spv::FunctionParameterAttribute Attr = spv::FunctionParameterAttributeMax;
       SPIRSPIRVFuncParamAttrMap::find(I.getKindAsEnum(), &Attr);

llvm-spirv/test/extensions/INTEL/SPV_INTEL_function_pointers/CodeSectionINTEL/decor-func-ptr-arg-attr.ll

@@ -1,6 +1,3 @@
-; TODO: update for nocapture -> captures(none) LLVM change.
-; XFAIL: *
-
 ; RUN: llvm-as %s -o %t.bc
 ; RUN: llvm-spirv %t.bc -o %t.spt -spirv-text -spirv-ext=+SPV_INTEL_function_pointers
 ; RUN: FileCheck < %t.spt %s --check-prefix CHECK-SPIRV
@@ -13,13 +10,13 @@
 ; CHECK-SPIRV: Capability FunctionPointersINTEL
 ; CHECK-SPIRV: Extension "SPV_INTEL_function_pointers"
 
-; CHECK-SPIRV: Decorate [[#TargetId:]] ArgumentAttributeINTEL 0 4
-; CHECK-SPIRV: Decorate [[#TargetId]] ArgumentAttributeINTEL 0 5
+; CHECK-SPIRV: Decorate [[#TargetId:]] ArgumentAttributeINTEL 0 5
+; CHECK-SPIRV: Decorate [[#TargetId]] ArgumentAttributeINTEL 0 4
 ; CHECK-SPIRV: Decorate [[#TargetId]] ArgumentAttributeINTEL 0 2
 ; CHECK-SPIRV: FunctionPointerCallINTEL
 ; CHECK-SPIRV-SAME: [[#TargetId]]
 
-; CHECK-LLVM: call spir_func addrspace(9) void %cond.i.i(ptr noalias captures(none) byval(%multi_ptr) %agg.tmp.i.i)
+; CHECK-LLVM: call spir_func addrspace(9) void %cond.i.i(ptr noalias byval(%multi_ptr) captures(none) %agg.tmp.i.i)
 
 ; ModuleID = 'sycl_test.cpp'
 target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-n8:16:32:64"

llvm-spirv/test/extensions/INTEL/SPV_INTEL_function_pointers/decor-func-ptr-arg-attr.ll

@@ -1,6 +1,3 @@
-; TODO: update for nocapture -> captures(none) LLVM change.
-; XFAIL: *
-
 ; RUN: llvm-as %s -o %t.bc
 ; RUN: llvm-spirv %t.bc -o %t.spt -spirv-text -spirv-ext=+SPV_INTEL_function_pointers
 ; RUN: FileCheck < %t.spt %s --check-prefix CHECK-SPIRV
@@ -13,13 +10,13 @@
 ; CHECK-SPIRV: Capability FunctionPointersINTEL
 ; CHECK-SPIRV: Extension "SPV_INTEL_function_pointers"
 
-; CHECK-SPIRV: Decorate [[#TargetId:]] ArgumentAttributeINTEL 0 4
-; CHECK-SPIRV: Decorate [[#TargetId]] ArgumentAttributeINTEL 0 5
+; CHECK-SPIRV: Decorate [[#TargetId:]] ArgumentAttributeINTEL 0 5
+; CHECK-SPIRV: Decorate [[#TargetId]] ArgumentAttributeINTEL 0 4
 ; CHECK-SPIRV: Decorate [[#TargetId]] ArgumentAttributeINTEL 0 2
 ; CHECK-SPIRV: FunctionPointerCallINTEL
 ; CHECK-SPIRV-SAME: [[#TargetId]]
 
-; CHECK-LLVM: call spir_func void %cond.i.i(ptr noalias captures(none) byval(%multi_ptr) %agg.tmp.i.i)
+; CHECK-LLVM: call spir_func void %cond.i.i(ptr noalias byval(%multi_ptr) captures(none) %agg.tmp.i.i)
 
 ; ModuleID = 'sycl_test.cpp'
 target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-n8:16:32:64"