[clang] [llvm] [mlir] [NVPTX] Unify and extend barrier{.cta} intrinsic support (PR #140615)

[Alex MacLean via cfe-commits]

================
@@ -240,6 +240,47 @@ def BF16RT   : RegTyInfo<bf16, Int16Regs, bf16imm, fpimm, supports_imm = 0>;
 def F16X2RT  : RegTyInfo<v2f16, Int32Regs, ?, ?, supports_imm = 0>;
 def BF16X2RT : RegTyInfo<v2bf16, Int32Regs, ?, ?, supports_imm = 0>;
 
+// This class provides a basic wrapper around an NVPTXInst that abstracts the
+// specific syntax of most PTX instructions. It automatically handles the
+// construction of the asm string based on the provided dag arguments.
+// For example, the following asm-strings would be computed:
+//
+//   * BasicFlagsNVPTXInst<(outs Int32Regs:$dst),
+//                         (ins Int32Regs:$a, Int32Regs:$b), (ins),
+//                         "add.s32">;
+//         ---> "add.s32 \t$dst, $a, $b;"
+//
+//   * BasicFlagsNVPTXInst<(outs Int32Regs:$d),
+//                         (ins Int32Regs:$a, Int32Regs:$b, Hexu32imm:$c),
+//                         (ins PrmtMode:$mode),
+//                         "prmt.b32${mode}">;
+//         ---> "prmt.b32${mode} \t$dst, $a, $b, $c;"
----------------
AlexMaclean wrote:

Fixed!

https://github.com/llvm/llvm-project/pull/140615