[CIR] Update cir.dyn_cast to use uniform assemby form w/o parens, commas

clang/include/clang/CIR/Dialect/IR/CIROps.td

@@ -287,6 +287,13 @@ def CIR_DynamicCastOp : CIR_Op<"dyn_cast"> {
     The `relative_layout` argument specifies whether the Itanium C++ ABI vtable
     uses relative layout. It is only meaningful when the operation models a
     cast-to-complete operation.
+
+    Example:
+
+    ```mlir
+    %res = cir.dyn_cast ptr %ptr: !cir.ptr<!rec_Base> -> !cir.ptr<!rec_Derived>
+    %res = cir.dyn_cast ptr relative_layout %ptr: !cir.ptr<!rec_Base> -> !cir.ptr<!rec_Derived>
+    ```
   }];
 
   let arguments = (ins
@@ -301,12 +308,9 @@ def CIR_DynamicCastOp : CIR_Op<"dyn_cast"> {
   );
 
   let assemblyFormat = [{
-    `(`
-      $kind `,` $src `:` qualified(type($src))
-      (`,` qualified($info)^)?
-      (`relative_layout` $relative_layout^)?
-    `)`
-    `->` qualified(type($result)) attr-dict
+    $kind (`relative_layout` $relative_layout^)? $src 
+    `:` qualified(type($src)) `->` qualified(type($result)) 
+    (qualified($info)^)? attr-dict
   }];
 
   let extraClassDeclaration = [{

clang/test/CIR/CodeGen/dynamic-cast-relative-layout.cpp

@@ -12,7 +12,7 @@ void *ptr_cast_to_complete(Base *ptr) {
 }
 
 // BEFORE: cir.func dso_local @_Z20ptr_cast_to_completeP4Base
-// BEFORE:   %{{.+}} = cir.dyn_cast(ptr, %{{.+}} : !cir.ptr<!rec_Base> relative_layout) -> !cir.ptr<!void>
+// BEFORE:   %{{.+}} = cir.dyn_cast ptr relative_layout %{{.+}} : !cir.ptr<!rec_Base> -> !cir.ptr<!void>
 // BEFORE: }
 
 //      AFTER: cir.func dso_local @_Z20ptr_cast_to_completeP4Base

clang/test/CIR/CodeGen/dynamic-cast.cpp

@@ -18,7 +18,7 @@ Derived *ptr_cast(Base *b) {
 }
 
 // BEFORE: cir.func dso_local @_Z8ptr_castP4Base
-// BEFORE:   %{{.+}} = cir.dyn_cast(ptr, %{{.+}} : !cir.ptr<!rec_Base>, #dyn_cast_info__ZTI4Base__ZTI7Derived) -> !cir.ptr<!rec_Derived>
+// BEFORE:   %{{.+}} = cir.dyn_cast ptr %{{.+}} : !cir.ptr<!rec_Base> -> !cir.ptr<!rec_Derived> #dyn_cast_info__ZTI4Base__ZTI7Derived
 // BEFORE: }
 
 //      AFTER: cir.func dso_local @_Z8ptr_castP4Base
@@ -43,7 +43,7 @@ Derived &ref_cast(Base &b) {
 }
 
 // BEFORE: cir.func dso_local @_Z8ref_castR4Base
-// BEFORE:   %{{.+}} = cir.dyn_cast(ref, %{{.+}} : !cir.ptr<!rec_Base>, #dyn_cast_info__ZTI4Base__ZTI7Derived) -> !cir.ptr<!rec_Derived>
+// BEFORE:   %{{.+}} = cir.dyn_cast ref %{{.+}} : !cir.ptr<!rec_Base> -> !cir.ptr<!rec_Derived> #dyn_cast_info__ZTI4Base__ZTI7Derived
 // BEFORE: }
 
 //      AFTER: cir.func dso_local @_Z8ref_castR4Base
@@ -66,7 +66,7 @@ void *ptr_cast_to_complete(Base *ptr) {
 }
 
 // BEFORE: cir.func dso_local @_Z20ptr_cast_to_completeP4Base
-// BEFORE:   %{{.+}} = cir.dyn_cast(ptr, %{{.+}} : !cir.ptr<!rec_Base>) -> !cir.ptr<!void>
+// BEFORE:   %{{.+}} = cir.dyn_cast ptr %{{.+}} : !cir.ptr<!rec_Base> -> !cir.ptr<!void>
 // BEFORE: }
 
 //      AFTER: cir.func dso_local @_Z20ptr_cast_to_completeP4Base

clang/test/CIR/IR/invalid.cir

@@ -1192,7 +1192,7 @@ module {
   cir.func private @__cxa_bad_cast()
   cir.func @test(%arg0 : !cir.ptr<!Base>) {
     // expected-error@+1 {{srcRtti must be an RTTI pointer}}
-    %0 = cir.dyn_cast(ptr, %arg0 : !cir.ptr<!Base>, #cir.dyn_cast_info<#cir.global_view<@_ZTI4Base> : !cir.ptr<!u32i>, #cir.global_view<@_ZTI7Derived> : !cir.ptr<!u8i>, @__dynamic_cast, @__cxa_bad_cast, #cir.int<0> : !s64i>) -> !cir.ptr<!Derived>
+    %0 = cir.dyn_cast ptr %arg0 : !cir.ptr<!Base> -> !cir.ptr<!Derived> #cir.dyn_cast_info<#cir.global_view<@_ZTI4Base> : !cir.ptr<!u32i>, #cir.global_view<@_ZTI7Derived> : !cir.ptr<!u8i>, @__dynamic_cast, @__cxa_bad_cast, #cir.int<0> : !s64i>
   }
 }
 
@@ -1214,7 +1214,7 @@ module {
   cir.func private @__cxa_bad_cast()
   cir.func @test(%arg0 : !cir.ptr<!Base>) {
     // expected-error@+1 {{destRtti must be an RTTI pointer}}
-    %0 = cir.dyn_cast(ptr, %arg0 : !cir.ptr<!Base>, #cir.dyn_cast_info<#cir.global_view<@_ZTI4Base> : !cir.ptr<!u8i>, #cir.global_view<@_ZTI7Derived> : !cir.ptr<!u32i>, @__dynamic_cast, @__cxa_bad_cast, #cir.int<0> : !s64i>) -> !cir.ptr<!Derived>
+    %0 = cir.dyn_cast ptr %arg0 : !cir.ptr<!Base> -> !cir.ptr<!Derived> #cir.dyn_cast_info<#cir.global_view<@_ZTI4Base> : !cir.ptr<!u8i>, #cir.global_view<@_ZTI7Derived> : !cir.ptr<!u32i>, @__dynamic_cast, @__cxa_bad_cast, #cir.int<0> : !s64i>
   }
 }