Fix llvm.frexp intrinsic translation with SPV_KHR_untyped_pointers (#2818)

Original commit:
KhronosGroup/SPIRV-LLVM-Translator@e3b9ba378349313

Author: vmaksimo

llvm-spirv/lib/SPIRV/SPIRVWriter.cpp

@@ -2251,7 +2251,15 @@ LLVMToSPIRVBase::transValueWithoutDecoration(Value *V, SPIRVBasicBlock *BB,
           auto *FrexpResult = transValue(RV, BB);
           SPIRVValue *IntFromFrexpResult =
               static_cast<SPIRVExtInst *>(FrexpResult)->getArgValues()[1];
-          IntFromFrexpResult = BM->addLoadInst(IntFromFrexpResult, {}, BB);
+          SPIRVType *LoadTy = nullptr;
+
+          if (IntFromFrexpResult->isUntypedVariable()) {
+            auto *BV =
+                static_cast<SPIRVUntypedVariableKHR *>(IntFromFrexpResult);
+            LoadTy = BV->getDataType();
+          }
+          IntFromFrexpResult =
+              BM->addLoadInst(IntFromFrexpResult, {}, BB, LoadTy);
 
           std::vector<SPIRVId> Operands = {FrexpResult->getId(),
                                            IntFromFrexpResult->getId()};
@@ -2470,7 +2478,13 @@ LLVMToSPIRVBase::transValueWithoutDecoration(Value *V, SPIRVBasicBlock *BB,
         // Idx = 1
         SPIRVValue *IntFromFrexpResult =
             static_cast<SPIRVExtInst *>(Val)->getArgValues()[1];
-        IntFromFrexpResult = BM->addLoadInst(IntFromFrexpResult, {}, BB);
+        SPIRVType *LoadTy = nullptr;
+        if (IntFromFrexpResult->isUntypedVariable()) {
+          auto *BV = static_cast<SPIRVUntypedVariableKHR *>(IntFromFrexpResult);
+          LoadTy = BV->getDataType();
+        }
+        IntFromFrexpResult =
+            BM->addLoadInst(IntFromFrexpResult, {}, BB, LoadTy);
         return mapValue(V, IntFromFrexpResult);
       }
     }

llvm-spirv/test/llvm-intrinsics/frexp.ll

@@ -1,11 +1,18 @@
 ; RUN: llvm-as %s -o %t.bc
 ; RUN: llvm-spirv %t.bc -spirv-text
-; RUN: FileCheck < %t.spt %s --check-prefix=CHECK-SPIRV
+; RUN: FileCheck < %t.spt %s --check-prefixes=CHECK-SPIRV,CHECK-SPIRV-TYPED-PTR
 ; RUN: llvm-spirv %t.bc -o %t.spv
 ; RUN: llvm-spirv -r %t.spv -o %t.rev.bc
 ; RUN: llvm-dis %t.rev.bc
 ; RUN: FileCheck < %t.rev.ll %s --check-prefix=CHECK-LLVM
 
+; RUN: llvm-spirv %t.bc --spirv-ext=+SPV_KHR_untyped_pointers -spirv-text -o %t.spt
+; RUN: FileCheck < %t.spt %s --check-prefixes=CHECK-SPIRV,CHECK-SPIRV-UNTYPED-PTR
+; RUN: llvm-spirv %t.bc --spirv-ext=+SPV_KHR_untyped_pointers -o %t.spv
+; RUN: llvm-spirv -r %t.spv -o %t.rev.bc
+; RUN: llvm-dis %t.rev.bc
+; RUN: FileCheck < %t.rev.ll %s --check-prefix=CHECK-LLVM
+
 target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024"
 target triple = "spir64-unknown-unknown"
 
@@ -14,7 +21,8 @@ target triple = "spir64-unknown-unknown"
 ; CHECK-SPIRV: TypeInt [[#TypeInt:]] 32
 ; CHECK-SPIRV: TypeFloat [[#TypeFloat:]] 32
 ; CHECK-SPIRV: TypeStruct [[#TypeStrFloatInt:]] [[#TypeFloat]] [[#TypeInt]]
-; CHECK-SPIRV: TypePointer [[#TypeIntPtr:]] 7 [[#TypeInt]]
+; CHECK-SPIRV-TYPED-PTR: TypePointer [[#TypeIntPtr:]] 7 [[#TypeInt]]
+; CHECK-SPIRV-UNTYPED-PTR: TypeUntypedPointerKHR [[#TypePtr:]] 7
 
 ; CHECK-SPIRV: TypeFloat [[#TypeDouble:]] 64
 ; CHECK-SPIRV: TypeStruct [[#TypeStrDoubleInt:]] [[#TypeDouble]] [[#TypeInt]]
@@ -49,7 +57,8 @@ declare { <4 x float>, <4 x i32> } @llvm.frexp.v4f32.v4i32(<4 x float>)
 declare { <2 x double>, <2 x i32> } @llvm.frexp.v2f64.v2i32(<2 x double>)
 
 ; CHECK-SPIRV: Function [[#TypeStrFloatInt:]]
-; CHECK-SPIRV: Variable [[#TypeIntPtr]] [[#IntVar:]] 7
+; CHECK-SPIRV-TYPED-PTR: Variable [[#TypeIntPtr]] [[#IntVar:]] 7
+; CHECK-SPIRV-UNTYPED-PTR: UntypedVariableKHR [[#TypePtr]] [[#IntVar:]] 7 [[#TypeInt]]
 ; CHECK-SPIRV: ExtInst [[#TypeFloat]] [[#FrexpId:]] [[#ExtInstSetId]] frexp [[#NegatedZeroConst]] [[#IntVar]]
 ; CHECK-SPIRV: Load [[#]] [[#LoadId:]] [[#]]
 ; CHECK-SPIRV: CompositeConstruct [[#TypeStrFloatInt]] [[#ComposConstr:]] [[#FrexpId]] [[#LoadId]]