AMDGPU: Emit llvm.fshr for __builtin_amdgcn_alignbit
These are equivalent. The generic rotate builtins do not directly map
to the fshr intrinsic.
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 8d86424..754d95d 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -13609,6 +13609,13 @@
return emitRangedBuiltin(*this, Intrinsic::r600_read_tidig_y, 0, 1024);
case AMDGPU::BI__builtin_r600_read_tidig_z:
return emitRangedBuiltin(*this, Intrinsic::r600_read_tidig_z, 0, 1024);
+ case AMDGPU::BI__builtin_amdgcn_alignbit: {
+ llvm::Value *Src0 = EmitScalarExpr(E->getArg(0));
+ llvm::Value *Src1 = EmitScalarExpr(E->getArg(1));
+ llvm::Value *Src2 = EmitScalarExpr(E->getArg(2));
+ Function *F = CGM.getIntrinsic(Intrinsic::fshr, Src0->getType());
+ return Builder.CreateCall(F, { Src0, Src1, Src2 });
+ }
default:
return nullptr;
}