[clang][SME] Remove folding of `__arm_in_streaming_mode()` (NFC) (#150917)
This is handled by the instcombine added in #147930; there is no need
for any clang-specific folding. NFC as all clang tests for
`__arm_in_streaming_mode()` used -O1, which applies the LLVM
instcombines.
diff --git a/clang/lib/CodeGen/TargetBuiltins/ARM.cpp b/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
index 2e6b4b3..980f7eb 100644
--- a/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
+++ b/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
@@ -4922,19 +4922,6 @@
if (Builtin->LLVMIntrinsic == 0)
return nullptr;
- if (BuiltinID == SME::BI__builtin_sme___arm_in_streaming_mode) {
- // If we already know the streaming mode, don't bother with the intrinsic
- // and emit a constant instead
- const auto *FD = cast<FunctionDecl>(CurFuncDecl);
- if (const auto *FPT = FD->getType()->getAs<FunctionProtoType>()) {
- unsigned SMEAttrs = FPT->getAArch64SMEAttributes();
- if (!(SMEAttrs & FunctionType::SME_PStateSMCompatibleMask)) {
- bool IsStreaming = SMEAttrs & FunctionType::SME_PStateSMEnabledMask;
- return ConstantInt::getBool(Builder.getContext(), IsStreaming);
- }
- }
- }
-
// Predicates must match the main datatype.
for (Value *&Op : Ops)
if (auto PredTy = dyn_cast<llvm::VectorType>(Op->getType()))
