Revert "Map llvm.isnan on OpIsNan (KhronosGroup#1179)"

The intrinsic was reverted in 3f1f08f0ed6 This reverts commit 81ebabd.
vmaksimo · Sep 3, 2021 · 6cef1d1 · 6cef1d1
1 parent 869f703
commit 6cef1d1
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diff --git a/lib/SPIRV/SPIRVWriter.cpp b/lib/SPIRV/SPIRVWriter.cpp
@@ -2576,7 +2576,6 @@ bool LLVMToSPIRVBase::isKnownIntrinsic(Intrinsic::ID Id) {
   case Intrinsic::dbg_label:
   case Intrinsic::trap:
   case Intrinsic::arithmetic_fence:
-  case Intrinsic::isnan:
     return true;
   default:
     // Unknown intrinsics' declarations should always be translated
@@ -3195,11 +3194,6 @@ SPIRVValue *LLVMToSPIRVBase::transIntrinsicInst(IntrinsicInst *II,
     }
     return Op;
   }
-  case Intrinsic::isnan: {
-    SPIRVType *Ty = transType(II->getType());
-    SPIRVValue *Op = transValue(II->getArgOperand(0), BB);
-    return BM->addUnaryInst(OpIsNan, Ty, Op, BB);
-  }
   default:
     if (BM->isUnknownIntrinsicAllowed(II))
       return BM->addCallInst(

diff --git a/test/transcoding/isnan.ll b/test/transcoding/isnan.ll