[libcxx-commits] [compiler-rt] [clang] [llvm] [mlir] [flang] [libc] [lldb] [clang-tools-extra] [libcxx] intrinsic to generate a bfi instruction (PR #79672)

[Yingchi Long via libcxx-commits]

================
@@ -2558,6 +2558,14 @@ def : Pat<(rotr GPR32:$Rn, (i64 imm0_31:$imm)),
 def : Pat<(rotr GPR64:$Rn, (i64 imm0_63:$imm)),
           (EXTRXrri GPR64:$Rn, GPR64:$Rn, imm0_63:$imm)>;
 
+def SDT_AArch64BFI_32bit : SDTypeProfile<1, 2, [SDTCisVT<0, i32>, SDTCisVT<1, i32>,
+                                                    SDTCisVT<2, i32>]>;
+def SDT_AArch64BFI_64bit : SDTypeProfile<1, 2, [SDTCisVT<0, i64>, SDTCisVT<1, i64>,
+                                                    SDTCisVT<2, i64>]>;
+
+def aarch64_bfiw  : SDNode<"AArch64::BFMWri",  SDT_AArch64BFI_32bit>;
----------------
inclyc wrote:

(question) could you explain why creating a new SDNode? Is this necessary?

https://github.com/llvm/llvm-project/pull/79672